NLK1 -INTERACTING PROTEINS

Abstract: Disclosed are complexes of the NlK1 protein and proteins identified as interacting with the NlK1 protein (NlK1 protein-IPs). The NlK-1 interacting proteins include TrkA, protein phosphatase 1 alpha , 14-3-3 epsilon , alpha -tropomyosin, vimentin, p0071, Ini-1, and newly described proteins named IP-1, IP-2, IP-3, IP-4, and IP-5. Also described are derivatives, fragments analogs and homologs of these proteins. Methods of screening these complexes for efficacy in treating and/or preventing various diseases and disorders, particularly, neoplasia, neurodegenerative disease, hypertrophic cardiomyopathy, viral infections and metabolic diseases and disorders are also disclosed.

Description: NLK1 -INTERACTING PROTEINS GRANT SUPPORT This invention was made with United States Government support under award number 70NANB5H1066 awarded by the National Institute of Standards and Technology. The United States Government has certain rights in the invention. RELATED APPLICATIONS This application claims priority to U.S.S.N. 09/167,206, filed October 6, 1998. The contents of this application are incorporated herein in their entirety. FIELD OF THE INVENTION The invention disclosed relates to polypeptides and nucleic acids encoding the same. In particular, the invention relates to polypeptides interacting with the NIKl protein and nucleic acids encoding these polypeptides complexes of the NIKl protein with other. BACKGROUND OF THE INVENTION NIKl protein, which is also referred to as the Nek2 protein, is a human homolog of the filamentous fungus Aspergillus nidulans mitotic regulator, NIMA kinase. The NIKl protein is a 48 Kdal serine/threonine-specific kinase and is thought to play a key role in cell-cycle events leading to the onset of mitosis. NIKl protein is expressed during specific stages of the cell-cycle; with low levels of expression during mitosis (M) phase and in early gap phase (GI), and expression peaking during the DNA-synthesis (S) and late gap phase (G2) to reach a plateau in late G2 and M-phase. Localization studies have shown that NIKl is a core component of the centrosome, which is the microtubule organizing center of the cell, and functional approaches suggest a possible role for NIKl in centrosome separation at the G2/M transition. The NIKl protein shares some functions with the NIMA kinase. The activity of NIMA kinase is reported to be essential for the progression of cells into mitosis, and the full activation of the NIMA kinase is thought to depend on the cyclin-dependent kinase, CDC2. Both NIMA and CDC2 kinases have been demonstrated to be required for the progression from G2 to mitosis in Aspergillus. Following this cell-cycle progression, both kinases are rapidly degraded. Recent experimental evidence has demonstrated that the Aspergillus NIMA serine/threonine kinase is not only required for mitosis, in cooperation with CDC2, but is also implicated in chromatin condensation. Additionally, the NIKl protein may also be involved in other events of meiosis including, for example, chromosomal condensation. SUMMARY OF THE INVENTION The invention is based in part on the discovery of proteins which interact with the NIKl protein, and of complexes containing these proteins. NIKl -interacting proteins described herein include TrkA, protein phosphatase lα, 14-3-3ε, α tropomyosin, vimentin, p0071, Ini-1, IP-1, IP- 2, IP-3, IP-4, or IP-5. The genes which encode the IP-1, IP-2, IP-3, IP-4, or IP-5 proteins have not been previously described. These protein complexes, and proteins contained therein are useful in the development of treatment modalities and assays for various pathological processes including, but not limited to, hyperproliferative disorders (e.g., tumorigenesis and tumor progression), as well as other related genetic disorders. Disclosed herein are compositions and methodologies for the production of protein complexes comprised of the NIKl protein and various other proteins which interact with (i.e., bind to) said NIKl protein. The proteins which have been demonstrated to form complexes with the NIKl protein will be designated hereinafter as "NIKl protein-IP" for NIKl protein interacting protein; whereas a complex of the NIKl protein and a NIKl protein-IP will hereinafter be designated as "NIKl protein*NlKl protein-IP". More specifically, the present invention relates to complexes of the NIKl protein, and derivatives, fragments and analogs thereof, with the following cellular proteins: ( ) TrkA; ( /) protein phosphatase l ; (Hi) 14-3-3ε; (iv) a tropomyosin; (v) vimentin; (vi) p0071; (vii) Ini-1; (viii) IP-1; (ix) IP-2; (x) IP-3; (xi) IP-4 and (xii) IP-5, as well as their derivatives, analogs and fragments. Methods of production of the NIKl protein*NlKl protein-IP complexes, and derivatives and analogs of these aforementioned proteins and protein complexes by, for example, recombinant means, will also be disclosed herein. Various pharmaceutical compositions relating to the NIKl protein:NlKl protein-IPs, NIKl protein*NlKl protein-IP complexes, and derivatives, fragments and analog thereof, will also be disclosed by the present invention. The present invention will further provide methodologies for the modulation (i.e., inhibiting or enhancing) of the activity of the NIKl protein*NlKl protein-IP complexes, particularly: the following complexes: NIKl protein*TrkA; NIKl protein*α tropomyosin; NIKl protein* vimentin; NIKl protein* p0071; NIKl protein*protein phosphatase lα; NIKl protein* 14-3-3ε; NIKl protein*Ini-l ; NIKl protein*IP-l ; NIKl protein*IP-2; NIKl protein*IP-3; NIKl protein*IP-4 and NIKl protein*IP-5. The protein components of these aforementioned complexes have been implicated in a plethora of cellular and physiological processes, including, but not limited to: ( ) control of cell-cycle progression; (/ ) cellular differentiation and apoptosis; (Hi) regulation of transcription; (iv) control of intracellular signal transduction and (v) pathological processes including, but not restricted to, hyperproliferative disorders (e.g., tumorigenesis and tumor progression); neurodegenerative diseases; cardiovascular disease; metabolic diseases and viral infections. Accordingly, the present invention provides methodologies for the screening of NIKl protein*NlKl protein-IP complexes, particularly complexes of the NIKl protein with TrkA, protein phosphatase lα, 14-3-3ε, α tropomyosin, vimentin, p0071, Ini-1, IP-1, IP-2, IP-3, IP-4, or IP-5, as well as derivatives, fragments and analogs thereof, for the ability to modulate or alter cell functions, particularly those cell functions in which NIKl protein and/or a NIKl protein-IP has been implicated including, but not limited to: control of cell-cycle progression; cellular differentiation and apoptosis; regulation of transcription; control of intracellular signal transduction; and pathological processes including, but not restricted to, hyperproliferative disorders (e.g., tumorigenesis and tumor progression); neurodegenerative diseases; cardiovascular disease; metabolic diseases viral infections. The present invention further relates to therapeutic and prophylactic, as well as diagnostic, prognostic and screening methodologies and pharmaceutical compositions which are based upon NIKl protein*NlKl protein-IP complexes (and the nucleic acids encoding the individual proteins constituents which participate in the complexes). Therapeutic compounds of the invention include, but are not limited to: (i) NIKl protein*N!Kl protein-IP complexes, and complexes where one or both members of the complex is a derivative, fragment or analog of the NIKl protein or a NIKl protein-IP; ( / ' ) antibodies to, and nucleic acids encoding the foregoing and (Hi) antisense nucleic acids to the nucleotide sequences encoding the various protein complex components. Diagnostic, prognostic and screening kits will also be provided. Animal models and methodologies of screening for various modulatory agents (i.e., agonists, antagonists and inhibitors) of the activity of the NIKl protein:NlKl protein-IPs and NIKl protein*NlKl protein-IP complexes, are also disclosed herein. Methodologies for the identification of molecules which inhibit, or alternatively, which increase the formation/synthesis of the NIKl protein:NlKl protein-IPs and NIKl protein*NlKl protein-IP complexes will also be provided by the present invention. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 : The nucleotide sequence of the NIKl protein (GenBank Accession No. UI 1050) [SEQ ID NO: 1] and the associated inferred amino acid sequence [SEQ ID NO:2]. A bait fragment, comprised of nucleotides 1089-1472 (indicated in bold), was utilized in the modified yeast two hybrid assay system in Section 6, infra. Figure 2: The nucleotide sequence [SEQ ID NO:3] and the associated inferred amino acid sequence [SEQ ID NO:4] of the Trk oncogene (TrkA) (GenBank Accession No. X03541). The underlined nucleotides indicate the 5 '-terminus start sites of the identified prey sequences, utilized in the modified yeast two hybrid assay system, which occur at nucleotides 176, 182, 200, 224 and 230 (amino acid residues 1-641). Figure 3: The nucleotide sequence [SEQ ID NO:5] and the associated inferred amino acid sequence [SEQ ID NO: 6] of protein phosphatase- lα (GenBank Accession No. M63960). The arrows indicate the 5'-start sites of identified prey sequences, utilized in the modified yeast two hybrid assay system, which occur at nucleotides 30, 33, 36, 48, 93, 96 and 150 (amino acid residues 1, 2, 3, 7, 22, 23, or 41 to 330). In addition, the first amino acid residue of the interacting domain is underlined. Figure 4: The nucleotide sequence [SEQ ID NO: 7] and associated inferred amino acid sequence [SEQ ID NO:8] of the 14-3-3ε protein (GenBank Accession No. U28936). The arrows indicate the 5'-start sites of identified prey sequences, utilized in the modified yeast two hybrid assay system, which occur at nucleotides 214, 223 and 427 (amino acid residues 72, 75 and 143 to 263). In addition, the first amino acid of the interacting domain is underlined. Figure 5: The nucleotide sequence [SEQ ID NO:9] and associated inferred amino acid sequence [SEQ ID NO: 10] of the α-tropomyosin protein (GenBank Accession No. Ml 9713). The prey sequence, utilized in the modified yeast two hybrid assay system, begins at nucleotide 535 (amino acid residues 161-347) and is indicated by an arrow. In addition, the first amino acid residue of the interacting domain is underlined.. Figure 6: The nucleotide sequence [SEQ ID NO: 11] and associated inferred amino acid sequence [SEQ ID NO:12] of the vimentin protein (GenBank Accession No. X56134). The prey sequence, utilized in the modified yeast two hybrid assay system, begins at nucleotide 581 (amino acid residues 180-466) and is indicated by an arrow. In addition, the first amino acid of the interacting domain is underlined. Figure 7: The nucleotide sequence [SEQ ID NO: 13] and associated inferred amino acid sequence [SEQ ID NO: 14] of the p0071 protein (GenBank Accession No. X81889). The prey sequence, utilized in the modified yeast two hybrid assay system, begins at nucleotides 708 and 711 (amino acid residues 189 and 190, respectively, up to amino acid residue 1208) and is indicated by arrows. In addition, the first amino acid of the interacting domain is underlined.. Figure 8: The nucleotide acid sequence [SEQ ID NO: 15] and associated inferred amino acid sequence [SEQ ID NO: 16] of the integrase interactor 1 protein (Ini-1) (GenBank Accession No. U04847). The prey sequence, utilized in the modified yeast two hybrid assay system, begins at nucleotide 289 (amino acid 74-385) and is indicated by an arrow); the first amino acid of the interacting domain is underlined. Figure 9: The nucleotide sequence [SEQ ID NO: 17] and associated inferred amino acid sequence [SEQ ID NO: 18] of the IP-1 protein (EST cg30153.g5). The prey sequence, utilized in the modified yeast two hybrid assay system, begins at nucleotide 1 (shown by arrow). The sequence does not include an initiation codon, and therefore the residue at amino acid position 1 is denoted in bold, thus indicating that the sequence must be extended in the direction of the amino-terminus. Additionally, the sequence does not have a stop codon. The open reading frame (ORE), comprising nucleotides 1-364, encodes the core-portion of protein possessing homology to proteins which are associated with the cellular cytoskeleton. Figure 10: The nucleotide sequence [SEQ ID NO: 19] and associated inferred amino acid sequence [SEQ ID NO:20] of the IP-2 protein.. The prey sequence, utilized in the modified yeast two hybrid assay system, begins at nucleotide 337 and is indicated in bold. The open reading frame (ORF) of IP-2 (frame +2), comprising nucleotides 122-1054, encodes a protein of 311 amino acid residues. A methionine start codon is found in only position 428. Note, that no methionine start codon was found and thus, an extension to the 5 '-terminus is likely. Figure 11 The nucleotide sequence [SEQ ID NO:21], comprising a total of 941 nucleotides, and associated inferred amino acid sequence [SEQ ID NO:22] of the IP-3 protein. The prey, utilized in the modified yeast two hybrid assay system, utilized in the modified yeast two hybrid assay system, begins at nucleotide 514 and is indicated by an arrow. The nucleic acid sequence of the EST H67985 sequence is shown in bold lettering (nucleotides 269-701), EST AA255861 (nucleotides 1-429 of the assembled EST) is shown in italics and EST AA251528 is denoted by underline starting at nucleotide 524 of the assembled expressed sequence. An open reading frame (ORF) could be translated from nucleotide 67 to 939, comprising a total of 291 amino acid residues. The sequence does not have a stop codon and thus represents the amino- terminal region of a protein possessing homology to ubiquitin carboxyl-terminal hydrolases. Figure 12: The nucleotide sequence [SEQ ID NO:23], comprising a total of 542 nucleotides, and associated inferred amino acid sequence [SEQ ID NO:24] of the IP-4 protein. Nucleotides 1-70 of cg50648e3 were extended at the 3 '-terminus with nucleotides 1-472 of EST M62042 (GenBank Accession No. M62042). The prey sequences, utilized in the modified yeast two hybrid assay system, begin at nucleotides 1 , 4, 40, 44, 54 and 65 and are indicated by arrows. The open reading frame (ORF) of IP-4 (frame +2), comprising nucleotides 2-316, encodes a protein of 105 amino acid residues. The sequence does not include an initiation codon, and therefore the Gly residue at amino acid residue 1 is denoted in bold and indicates that the sequence must be extended in the direction of the amino-terminus. Figure 13: The nucleotide sequence [SEQ ID NO:25], comprising a total of 441 nucleotides, and associated inferred amino acid sequence [SEQ ID NO:26] of the IP-5 protein. The prey sequence, utilized in the modified yeast two hybrid assay system, begins at nucleotide 1. The sequence does not include an initiation codon, and therefore the Thr amino acid residue at amino acid position 1 is denoted in bold and indicates that the sequence must be extended in the direction of the amino-terminus. The open reading frame (ORF) from nucleotides 1-246 encodes the carboxyl-terminal region of a protein possessing homology to ganglioside-induced differentiation associated protein 1 homolog protein. Figure 14: Matrix of the results of the modified yeast two hybrid system assays. The results of assays using the bait NIKl protein are indicated above the columns; whereas prey proteins comprised of: TrkA, protein phosphatase lα, 14-3-3ε, α-tropomyosin, vimentin, p0071, Ini-1, IP-1, IP-2, IP-3, IP-4, IP-5, and CDK2 are indicated to the left of the rows. A positive interaction for a bait and prey protein is indicated as "+" within the box forming the intersection between the particular bait and prey proteins; whereas a "-" indicates the growth of yeast expressing vector, but no interaction with the NIKl protein. Table 1 : Overview of all NIKl protein interactants (NIKl protein-IPs) found in the modified yeast two hybrid assay system screening. In column one, the NIKl protein interactant (NIKl protein-IP) and its GenBank Accession Number (if available) is listed. In column 2, a brief description of the (putative) function and suggested utility is provided. In column 3, the nucleotides where the open reading frame (ORF) begin (start) and end (stop) are indicated, along with the total number of nucleotides in the case of expressed sequences. In column 4, the first nucleotide ("start") of the interacting domains is given. In column 5, the number of isolates obtained for the corresponding fragment found to interact with the NIKl protein in the two- hybrid screen is indicated. Column 6 shows the open reading frame (ORF) of the respective protein. Column 7 refers to the specific SEQ ID NO:, and finally, column 8 illustrates the expressed sequences which were utilized for the assembly of the corresponding sequence. DETAILED DESCRIPTION OF THE INVENTION The present invention is based upon the identification of proteins which have been demonstrated to interact with the NIKl protein (hereinafter referred to as "NIKl protein-IPs") using an improved, modified form of the yeast two hybrid system. The following proteins (NIKl protein-IPs were found to form complexes under physiological conditions with the NIKl protein: (i) TrkA; (ii) protein phosphatase lα; (Hi) 14-3-3ε; (iv) α-tropomyosin; (v) vimentin; (vi) p0071; (vii) Ini-1 ; (viii) IP-1 ; (ix) IP-2; (x) IP-3; (xi) IP-4 and (xii) IP-5. Complexes of the NIKl protein with a NIKl protein-IP are hereinafter referred to as "NIKl protein*NlKl protein-IP" complexes. NIKl protein*NlKl protein-IP complexes are implicated in the modulation of functional activities of the NIKl protein and its binding partners (NIKl protein-IPs). Such functional activities include, but are not limited to: (i) control of cell-cycle progression (e.g., cellular differentiation and apoptosis); (//) regulation of transcription; ( //) control of intracellular signal transduction and (iv) pathological processes including, but not restricted to, hyperproliferative disorders (e.g., tumorigenesis and tumor progression), neurodegenerative diseases, cardiovascular disease, metabolic diseases and viral infections. The present invention, through utilization of an improved, modified form of the yeast two hybrid system, has identified novel proteins, encoded by the IP-1, IP-2, IP-3, IP-4, or IP-5 nucleotide sequences. Accordingly, the invention further relates to nucleotide sequences IP-1, IP-2, IP-3, IP-4, or IP-5 (preferably, the human IP-1, IP-2, IP-3, IP-4, or IP-5 genes) and homologs of other species, as well as derivatives, fragments and analogs thereof. Nucleic acids which are able to hybridize to, or are complementary to, the aforementioned nucleotide sequence (e.g., the inverse complement) of the foregoing sequences are also provided. More specifically, the present invention discloses nucleic acids which comprise, are hybridizable (e.g., the inverse complement) or which are complementary to, at least a 5, 10 or 25 nucleotide region of the IP-1, IP-2, IP-3, IP-4, or IP-5 nucleotide sequences. The present invention also relates to IP-1, IP-2, IP-3, IP-4, or IP-5 derivatives, fragments and analogs which are functionally active (i.e., they are capable of displaying one or more known functional activities of a wild-type IP-1, IP-2, IP-3, IP-4, or IP-5 protein. Such functional activities include, but are not limited to: (z ' )the ability to bind with, or compete for binding with the NIKl protein; ( ) antigenicity (the ability to bind, or compete with, IP-1, IP-2, IP-3, IP-4, or IP-5 for binding to an anti-IP- l,anti-IP-2, anti-IP-3, anti-IP-4, or anti-IP-5 antibody, respectively) and (Hi) immunogenicity (the ability to generate an antibody which binds IP-1, IP- 2, IP-3, IP-4, or IP-5 respectively). The present invention further discloses methodologies of screening for proteins which interact with (e.g., bind to) the NIKl protein. The invention also relates to NIKl protein complexes, in particular the NIKl protein complexed with one of the following proteins: TrkA, protein phosphatase lα, 14-3-3ε, α-tropomyosin, vimentin, p0071, Ini-1, IP-1, IP-2, IP-3, IP-4, or IP-5. The invention further discloses complexes of the NIKl protein, or derivatives, analogs and fragments of the NIKl protein with TrkA, protein phosphatase lα, 14-3-3ε, α-tropomyosin, vimentin, p0071, Ini-1, IP-1, IP-2, IP-3, IP-4, or IP-5, or derivatives, analogs and fragments thereof. In a preferred embodiment, such complexes bind an anti-NlKl protein*NlKl protein-IP complex antibody. In another specific embodiment, complexes of human NIKl protein with human proteins are disclosed. The present invention also provides methodologies for the production and/or isolation of NIKl protein*NlKl protein-IP complexes. In a specific embodiment, the present invention provides methodologies of using recombinant DNA techniques to express both the NIKl protein and its binding partner (NIKl protein-IP), or fragments, derivatives or homologs of one or both members of the complex; wherein either both binding partners are under the control of one heterologous promoter (i.e. a promoter which is not naturally associated with the native gene encoding the particular complex component) or where each is under the control of a separate heterologous promoter. Methodologies of diagnosis, prognosis, and screening for diseases and disorders associated with aberrant levels of NIKl protein*NlKl protein-IP complexes are discloses. The present invention also provides methodologies for the treatment and prevention of diseases or disorders which are associated with aberrant levels of NIKl protein*NlKl protein-IP complexes, or aberrant levels or activity of one or more of the components of a NIKl protein*NlKl protein- IP complex, by the administration of NIKl protein*NlKl protein-IP complexes, or modulators of NIKl protein**NlKl protein-IP complex formation or activity (e.g., antibodies which bind the NIKl protein*NlKl protein-IP complex, or non-complexed NIKl protein, or its binding partner (NIKl protein-IP), or a fragment thereof. Preferably, the aforementioned fragment contains: (/) the portion of the NIKl protein or the NIKl protein-IP which is directly involved in complex formation; ( / ' ) mutants of the NIKl protein or the NIKl protein-IP which increase or decrease binding affinity; (Hi) small molecule inhibitors/enhancers of complex formation; (iv) antibodies that either stabilize or neutralize the complex, and the like. Methodologies of assaying NIKl protein*NlKl protein-IP complexes for biological activity as a therapeutic or diagnostic, as well as methods of screening for NIKl protein*NlKl protein-IP complex, or modulators thereof (i.e., inhibitors, agonists and antagonists) are also disclosed herein. For clarity of disclosure and enablement, and not by way of limitation, the detailed description of the invention is divided into the subsections which follow. (1) The NIKl Protein. NIKl Protein-IPs and NIKl Protein*NlKl Protein-IP Complexes The present invention discloses NIKl protein*NlKl protein-IP complexes and, in particular aspects, complexes of the NIKl protein with: TrkA, protein phosphatase lα, 14-3-3ε, α-tropomyosin, vimentin, p0071, Ini-1, IP-1, IP-2, IP-3, IP-4, or IP-5. In a preferred embodiment, the NIKl protein*NlKl protein-IP complexes are complexes of human proteins. The present invention also relates to: ( ) complexes of derivatives, fragments and analogs of the NIKl protein with a NIKl protein-IP; (ii) complexes of the NIKl protein with derivatives, fragments and analogs of a NIKl protein-IP and (Hi) complexes of derivatives, fragments and analogs of the NIKl protein and a NIKl protein-IP. As used herein, fragment, derivative or analog of a NIKl protein*NlKl protein-IP complex includes complexes where one or both members of the complex are fragments, derivatives or analogs of the wild-type NIKl protein or NIKl protein-IP. Preferably, as disclosed by the present invention, the NIKl protein*NlKl protein-IP complexes in which one or both members of the complex are a fragment, derivative or analog of the wild-type protein are functionally active NIKl protein*NlKl protein-IP complexes. In particular aspects, the native proteins, derivatives or analogs of the NIKl protein and/or the NIKl protein-IPs are of animals (e.g., mouse, rat, pig, cow, dog, monkey, frog); insects (e.g., fly); plants or, most preferably, human. As utilized herein, the term "functionally active NIKl protein *N1K1 protein-IP complex" refers to species displaying one or more known functional attributes of a full-length NIKl protein complexed with a full-length NIKl protein-IP (e.g., TrkA, protein phosphatase lα, 14-3-3ε, α-tropomyosin, vimentin, p0071, Ini-1, IP-1, IP-2, IP-3, IP-4, and IP-5) including, but not exclusive to, the control of cellular and physiological processes, such including, but not limited to: (/ ' ) control of cell-cycle progression (e.g., cellular differentiation and apoptosis); (/ ) regulation of transcription; (Hi) control of intracellular signal transduction and (v) pathological processes including but not limited to, hyperproliferative disorders (e.g., tumorigenesis and tumor progression); neurodegenerative diseases; cardiovascular disease; metabolic diseases and viral infections. In accord, the present invention provides methodologies for the screening of NIKl protein*NlKl protein-IP complexes, particularly complexes of the NIKl protein with: TrkA, protein phosphatase lα, 14-3-3ε, α-tropomyosin, vimentin, p0071, Ini-1, IP-1, IP-2, IP-3, IP-4, or IP-5, as well as derivatives, fragments and analogs thereof, for the ability to alter and/or modulate cellular functions, particularly those functions in which the NIKl protein and/or NIKl protein-IP have been implicated. These functions include, but are not limited to: but not limited to: control of cell-cycle progression; regulation of transcription; control of intracellular signal transduction; and pathological processes, as well as various other biological activities (e.g., binding to an anti-NlKl protein*NlKl protein-IP complex antibody, and the like). The derivatives, fragments or analogs which possess the desired immunogenicity and/or antigenicity may be utilized in immunoassays, for immunization, for inhibition of NIKl protein*NlKl protein-IP complex activity, etc. For example, derivatives, fragments or analogs which retain, or alternatively lack or inhibit, a given property of interest (e.g., participation in a NIKl protein* NIKl protein-IP complex) may be utilized as inducers, or inhibitors, respectively, of such a property and its physiological correlates. In a specific embodiment, a NIKl protein*NlKl protein-IP complex of a fragment of the NIKl protein and/or a fragment of NIKl protein-IP which can be bound by an anti-NlKl protein and/or anti-NlKl protein-IP antibody or antibody specific for a NIKl protein*NlKl protein-IP complex when such a fragment is included within a given NIKl protein*NlKl protein-IP complex. Derivatives, fragments and analogs of NIKl protein*NlKl protein-IP complexes may be analyzed for the desired activity or activities by procedures known within the art. Specific embodiments of the present invention disclose NIKl protein* Kl protein-IP complexes comprised of fragments of one or both protein species of the complex. In a preferred embodiment, these aforementioned fragments may consist of, but are not limited to, fragments of: TrkA, protein phosphatase lα, 14-3-3ε, α-tropomyosin, vimentin, p0071, Ini-1, IP-1, IP-2, IP-3, IP-4, or IP-5, which have previously been identified as interacting with the NIKl protein in an improved, modified yeast two hybrid assay. For example, amino acid residues 1-641 of the TrkA protein (depicted in Figure 2; SEQ ID NO:4); amino acid residues 1, 2, 3, 7, 22, 23, and 41-330 of protein phosphatase lα (depicted in Figure 3; SEQ ID NO:6); amino acid residues 72, 75 and 143-263 of the 14-3-3ε protein (depicted in Figure 4; SEQ ID NO:8); amino acid residue 161-347 of the α-tropomyosin protein (depicted in Figure 5; SEQ ID NO: 10); amino acid residues 180-466 of the vimentin protein (depicted in Figure 6; SEQ ID NO:12); amino acid residues 189, 190-1208 of the p0071 protein (depicted in Figure 7; SEQ ID NO:14); amino acid residues 74-385 of the Ini-1 protein (depicted in Figure 8; SEQ ID NO:16); at least amino acid residue 1-122 of the IP-1 protein (depicted in Figure 9; SEQ ID NO:18); at least amino acid residues 58-311 of the IP-2 protein (depicted in Figure 10; SEQ ID NO:20); at least amino acid residues 150-291 of the IP-3 protein, a ubiquitin hydrolase homolog (depicted in Figure 11; SEQ ID NO:22); at least amino acid residues 1-105 of the IP-4 protein (depicted in Figure 12; SEQ ID NO:24) and at least amino acid residues 1-82 of the IP-5 protein (depicted in Figure 13; SEQ ID NO:26). In addition, fragments (or proteins comprising fragments) which may lack some or all of the aforementioned regions of either member of the complex, as well as nucleic acids which encode the aforementioned proteins, are also disclosed herein. The present invention further relates to the IP-1, IP-2, IP-3, IP-4, or IP-5 proteins, as well as derivatives, fragments, analogs, homologs and paralogs thereof. In a preferred embodiment, human IP-1, IP-2, IP-3, IP-4, or IP-5 genes and/or proteins are disclosed. In a specific embodiments, the derivative, fragment, analog, homolog or paralog has the following attributes: (i) is functionally active (i.e., capable of exhibiting one or more functional activities associated with full-length, wild-type IP-1, IP-2, IP-3, IP-4, or IP-5; (ii) possesses the ability to bind the NIKl protein; ( ) is immunogenic or (iv) is antigenic. The nucleotide sequences which encode, as well as the corresponding amino acid sequences of, human NIKl protein, TrkA, α-tropomyosin, vimentin, p0071, protein phosphatase lα; 14-3-3ε and Ini-1 are known (GenBank Accession Nos. UI 1050; X03541 ; M63960; U28936; M19713; X56134; X81889 and U04847, respectively), are provided in Figures 1-8, respectively and are identified by SEQ ID NOS: 1-16, respectively. In addition, the nucleotide and inferred amino acid sequences of IP-1, IP-2, IP-3, IP-4, and IP-5 are provided in Figures 9, 10, 11, 12, and 13, respectively (SEQ ID NOS: 17-26, respectively). Nucleic acids encoding TrkA, α-tropomyosin, vimentin, p0071, protein phosphatase lα; 14-3-3ε and Ini-1, IP- 1, IP-2, IP-3, IP-4, or IP-5 may be obtained by any method known within the art (e.g., by PCR amplification using synthetic primers hybridizable to the 3'- and 5'-termini of the sequence and/or by cloning from a cDNA or genomic library using an oligonucleotide sequence specific for the given gene sequence. Homologs (i.e., nucleic acids encoding the aforementioned proteins derived from species other than human) or other related sequences (e.g., paralogs) can also be obtained by low, moderate or high stringency hybridization with all or a portion of the particular human sequence as a probe using methods well known in the art for nucleic acid hybridization and cloning. The NIKl protein, TrkA, α-tropomyosin, vimentin, p0071, protein phosphatase lα; 14-3-3ε and Ini-1, IP-1, IP-2, IP-3, IP-4, or IP-5 proteins, either alone or within a complex, may be obtained by methods well-known in the art for protein purification and recombinant protein expression. For recombinant expression of one or more of the proteins, the nucleic acid containing all or a portion of the nucleotide sequence encoding the protein may be inserted into an appropriate expression vector (i.e., a vector which contains the necessary elements for the transcription and translation of the inserted protein coding sequence). In a preferred embodiment, the regulatory elements are heterologous (i.e., not the native gene promoter). Alternately, the necessary transcriptional and translational signals may also be supplied by the native promoter for the NIKl protein or any NIKl protein-IP genes and/or their flanking regions. A variety of host- vector systems may be utilized to express the protein coding sequence(s). These include, but are not limited to: (i) mammalian cell systems which are infected with vaccinia virus, adenovirus, and the like; (ii) insect cell systems infected with baculovirus and the like; (///) yeast containing yeast vectors or (iv) bacteria transformed with bacteriophage, DNA, plasmid DNA, or cosmid DNA. Depending upon the host-vector system utilized, any one of a number of suitable transcription and translation elements may be used. In a preferred embodiment of the present invention, the NIKl protein*NlKl protein-IP complexes are obtained by expressing the entire NIKl protein coding sequence and a NIKl protein-IP coding sequence within the same cell, either under the control of the same promoter or two separate promoters. In another embodiment, a derivative, fragment or homolog of the NIKl protein and/or a derivative, fragment or homolog of a NIKl protein-IP are recombinantly expressed. Preferably, the derivative, fragment or homolog of the NIKl protein and/or the NIKl protein-IP form a complex with a binding partner which has been identified by a binding assay (e.g., the modified yeast two hybrid system assay ) and, more preferably, form a complex which binds to an anti-NlKl protein*NlKl protein-IP complex antibody. Any of the methodologies known within the relevant prior art regarding the insertion of nucleic acid fragments into a vector may be utilized to construct expression vectors which contain a chimeric gene comprised of the appropriate transcriptional/translational control signals and protein-coding sequences. These methodologies may include, but are not limited to, in vitro recombinant DNA and synthetic techniques, as well as in vivo recombination techniques (e.g., genetic recombination). The expression of nucleic acid sequences which encode the NIKl protein and a NIKl protein-IP, or derivatives, fragments, analogs or homologs thereof, may be regulated by a second nucleic acid sequence such that the genes or fragments thereof are expressed in a host which has been concomitantly transformed with the recombinant DNA molecule(s) of interest. The expression of the specific proteins may be controlled by any promoter/enhancer known in the art including, but not limited to: (/) the SV40 early promoter (see e.g., Bernoist & Chambon, 1981. Nature 290:304-310); (ii) the promoter contained within the 3'-terminus long terminal repeat of Rous Sarcoma Virus (RSV; see e.g., Yamamoto, et al., 1980. Cell 22:787-797); (Hi) the Herpesvirus thymidine kinase promoter (see e.g., Wagner, et al., 1981. Proc. Natl. Acad. Sci. USA 78 : 1441 - 1445); (iv) the regulatory sequences of the metallothionein gene (see e.g., Brinster, et al., 1982. Nature 296:39-42); (v) prokaryotic expression vectors such as the β-lactamase promoter (see e.g., Villa-Kamaroff, et al., 1978. Proc. Natl. Acad. Sci. USA 75:3727-3731); (vi) the tac promoter (see e.g., DeBoer, et al., 1983. Proc. Natl. Acad Sci. USA 80:21-25. In addition, plant promoter/enhancer sequences within plant expression vectors may also be utilized including, but not limited to: ( ) the nopaline synthetase promoter (see e.g., Herrar- Estrella, et al., 1984. Nature 303:209-213); ( /) the cauliflower mosaic virus 35S RNA promoter (see e.g., Garder, et al., 1981. Nuc. Acids Res. 9:2871) and (Hi) the promoter of the photosynthetic enzyme ribulose bisphosphate carboxylase (see e.g., Herrera-Estrella, et al., 1984. Nature 310:115-120). Promoter/enhancer elements from yeast and other fungi (e.g., the Gal4 promoter, the alcohol dehydrogenase promoter, the phosphoglycerol kinase promoter, the alkaline phosphatase promoter), as well as the following animal transcriptional control regions, which possess tissue specificity and have been used in transgenic animals, may be utilized in the production of proteins of the present invention. Transcriptional control sequences derived from animals include, but are not limited to: (i) the elastase I gene control region active within pancreatic acinar cells (see e.g., Swift, et al., 1984. Cell 38:639-646; Ornitz, et al., 1986. Cold Spring Harbor Symp. Quant. Biol. 50:399-409); (ii) the insulin gene control region active within pancreatic β-cells (see e.g., Hanahan, et al., 1985. Nature 315:115-122); (Hi) the immunoglobulin gene control region active within lymphoid cells (see e.g., Grosschedl, et al., 1984. Cell 38:647-658); (iv) the mouse mammary tumor virus control region active within testicular, breast, lymphoid and mast cells (see e.g., Leder, et al, 1986. Cell 45:485-495); (v) the albumin gene control region active within liver (see e.g., Pinckert, et al, 1987. Genes and Devel 1:268-276); (vi) the α-fetoprotein gene control region active within liver (see e.g., Krumlauf, et al, 1985. Mol. Cell. Biol. 5:1639-1648; (Hammer et al., 1987, Science 235: 53-58), (vii) the α-1 anti-trypsin gene control region active within liver (see e.g., Kelsey, et al., 1987. Genes and Devel. 1:161-171); (viii) the β-globin gene control region active within myeloid cells (see e.g., Mogram, et al, 1985. Nature 315:338-340; (ix) the myelin basic protein gene control region active within brain oligodendrocyte cells (see e.g., Readhead, et al, 1987. Cell 48:703-712); (x) the myosin light chain-2 gene control region active within skeletal muscle (see e.g., Sani, et al, 1985. Nature 314:283-286) and (xi) the gonadotrophin-releasing hormone gene control region active within the hypothalamus (see e.g., Mason, et al, 1986. Science 234:1372-1378). In a specific embodiment of the present invention, a vector is utilized which comprises a promoter operably-linked to nucleic acid sequences which encode the NIKl protein and/or a NIKl protein-IP (e.g., TrkA, protein phosphatase lα, 14-3-3ε, α-tropomyosin, vimentin, p0071, Ini-1, IP-1, IP-2, IP-3, IP-4, or IP-5), or a fragment, derivative or homolog, thereof, one or more origins of replication, and optionally, one or more selectable markers (e.g., an antibiotic resistance gene). In a preferred embodiment, a vector is utilized which is comprised of a promoter operably-linked to nucleic acid sequences encoding both the NIKl protein and a NIKl protein-IP, one or more origins of replication, and, optionally, one or more selectable markers. In another specific embodiment, an expression vector containing the coding sequences (or portions thereof) of the NIKl protein and a NIKl protein-IP, either together or separately. The expression vector is generated by subcloning the aforementioned gene sequences into the EcoRI restriction site of each of the three available pGEX vectors (glutathione S-transf erase expression vectors; see e.g., Smith & Johnson, 1988. Gene 7:31-40), thus allowing the expression of products in the correct reading frame. Expression vectors which contain the sequences of interest may be identified by three general approaches: (i) nucleic acid hybridization, (ii) presence or absence of "marker" gene function and/or (///) expression of the inserted sequences. In the first approach, NIKl protein, TrkA, protein phosphatase lα, 14-3-3ε, α-tropomyosin, vimentin, p0071, Ini-1, IP-1, IP-2, IP-3, IP-4, or IP-5 (or other NIKl protein-IP sequences) may be detected by nucleic acid hybridization using probes comprising sequences homologous and complementary to the inserted sequences of interest. In the second approach, the recombinant vector/host system may be identified and selected based upon the presence or absence of certain "marker" functions (e.g., binding to an antibody specific for the NIKl protein, a NIKl protein-IP, or a NIKl protein*NlKl protein-IP complex, resistance to antibiotics, occlusion-body formation in baculovirus, and the like) caused by the insertion of the sequences of interest into the vector. In the third approach, recombinant expression vectors may be identified by assaying for the expression of the NIKl protein concomitantly with expression of the aforementioned NIKl protein-IPs by the recombinant vector. Once the recombinant NIKl protein and NIKl protein-IP molecules have been identified and the complexes or individual proteins isolated, and a suitable host system and growth conditions have been established, the recombinant expression vectors may be propagated and amplified in-quantity. As previously discussed, expression vectors or their derivatives which can be used include, but are not limited to, human or animal viruses (e.g., vaccinia virus or adenovirus); insect viruses (e.g., baculovirus); yeast vectors; bacteriophage vectors (e.g., lambda phage); plasmid vectors and cosmid vectors. A host cell strain may then be selected which modulates the expression of the inserted sequences of interest, or modifies/processes the expressed proteins in the specific manner desired. In addition, expression from certain promoters may be enhanced in the presence of certain inducers; thus facilitating control of the expression of the genetically-engineered NIKl protein and/or NIKl protein-IP. Moreover, different host cells possess characteristic and specific mechanisms for the translational and post-translational processing and modification (e.g., glycosylation, phosphorylation, and the like) of expressed proteins. Appropriate cell lines or host systems may thus be chosen to ensure the desired modification and processing of the foreign protein is achieved. For example, protein expression within a bacterial system can be used to produce an unglycosylated core protein; whereas expression within mammalian cells ensures "native" glycosylation of a heterologous protein. In other specific embodiments, the NIKl protein and/or NIKl protein-IPs (or derivatives, fragments, analogs and homologs thereof) may be expressed as fusion or chimeric protein products comprising the protein joined via a peptide bond to a heterologous protein sequence of a different protein. Such chimeric products may be produced by the ligation of the appropriate nucleic acid sequences encoding the desired amino acids to one another in the proper coding frame and subsequently expressing the chimeric products in a suitable host by methods known within the art. Alternatively, such a chimeric product can be made by protein synthetic techniques (e.g., by use of a peptide synthesizer). A specific embodiment of the present invention discloses a chimeric protein comprising a fragment of the NIKl protein and/or a NIKl protein-IP. In another specific embodiment, fusion proteins are provided which contain the domains of the NIKl protein and a NIKl protein-IP (which result in the direct formation of NIKl protein*NlKl protein-IP complexes) and, optionally, a heterofunctional reagent (e.g., a peptide linker) which serves to both link the two aforementioned proteins and promote the interaction of the NIKl protein and NIKl protein-IP binding domains. These fusion proteins may be particularly useful where the stability of the interaction is desirable (i.e., stability due to the formation of the complex as an intramolecular reaction), for example in production of antibodies specific to the NIKl protein*NlKl protein-IP complex. In a specific embodiment of the present invention, the nucleic acids encoding proteins, and proteins consisting of, or comprising a fragment of the NIKl protein or a NIKl protein-IP which consists of at least 6 contiguous amino acid residues of the NIKl protein and/or a NIKl protein-IP, are provided herein. In another embodiment, the aforementioned protein fragment is comprised of at least 10, 20, 30, 40, or 50 amino acid residues (preferably not larger that 35, 100 or 200 amino acid residues) of the NIKl protein or NIKl protein-IP. Derivatives or analogs of the NIKl protein and NIKl protein-IPs include, but are not limited to, molecules comprising regions which are substantially homologous to the NIKl protein or the NIKl protein-IPs in various embodiments, of at least 30%, 40%, 50%, 60%, 70%, 80%, 90% or 95% amino acid identity when: (/) compared to an amino acid sequence of identical size; (ii) compared to an aligned sequence in which the alignment is done by a computer homology program known within the art or ( /) the encoding nucleic acid is capable of hybridizing to a sequence encoding the NIKl protein or a NIKl protein-IP under stringent, moderately stringent, or non-stringent conditions. NIKl protein and/or NIKl protein-IP derivatives may be produced by alteration of their sequences by substitutions, additions or deletions which result in functionally-equivalent molecules. In a specific embodiment of the present invention, the degeneracy of nucleotide coding sequences allows for the use of other DNA sequences which encode substantially the same amino acid sequence as the NIKl protein or NIKl protein-IP genes. In another specific embodiment, one or more amino acid residues within the sequence of interest may be substituted by another amino acid of a similar polarity and net charge, thus resulting in a silent alteration. Substitutes for an amino acid within the sequence may be selected from other members of the class to which the amino acid belongs. The NIKl protein or NIKl protein-IP derivatives and analogs of the present invention may be produced by various methodologies known within the art. For example, the cloned NIKl protein and NIKl protein-IP gene sequences may be modified by any of numerous methods known within the art. See e.g., Sambrook, et al, 1990. Molecular Cloning: A Laboratory Manual, 2nd ed., (Cold Spring Harbor Laboratory Press; Cold Spring Harbor, NY). These sequences may be digested at appropriate sites with restriction endonuclease(s), followed by further enzymatic modification, if so desired, and the resultant fragments isolated and ligated in vitro. Additionally, the NIKl protein- or NIKl protein-IP- encoding nucleic acids may be mutated in vitro or in vivo to: (ϊ) create variations in coding regions; (//) create and/or destroy translation, initiation, and/or termination sequences and/or (Hi) form new restriction endonuclease sites or destroy pre-existing ones, so as to facilitate further in vitro modification. Any technique for mutagenesis known within the art may be utilized, including but not limited to, chemical mutagenesis and in vitro site-directed mutagenesis (see e.g., Hutchinson, et al, 1978. J. Biol. Chem 253:6551-6558); by use of TABJ™ linkers (Pharmacia) and similar methodologies. Once a recombinant cell expressing the NIKl protein and/or a NIKl protein-IP, or a fragment or derivative thereof, is identified, the individual gene product or complex may be isolated and analyzed. This is achieved by assays which are based upon the physical and/or functional properties of the protein or complex, including, but not limited to, radioactive labeling of the product followed by analysis by gel electrophoresis, immunoassay, cross-linking to marker-labeled products, and the like. The NIKl protein*NlKl protein-IP complexes may be isolated and purified by standard methods known in the art (either from natural sources or recombinant host cells expressing the proteins/protein complexes) including, but not limited to, column chromatography (e.g., ion exchange, affinity, gel exclusion, reverse-phase, high pressure, fast protein liquid, etc), differential centrifugation, differential solubility, or similar methodologies used for the purification of proteins. Alternatively, once NIKl protein or NIKl protein-IP or its derivative is identified, the amino acid sequence of the protein can be deduced from the nucleic acid sequence of the chimeric gene from which it was encoded. Hence, the protein or its derivative can be synthesized by standard chemical methodologies known in the art. See, e.g., Hunkapiller, et al., 1984. Nature 310:105-111. In a specific embodiment of the present invention, such NIKl protein*NlKl protein-IP complexes, whether produced by recombinant DNA techniques, chemical synthesis methods or by purification from native sources, include, but are not limited to, those containing as a primary amino acid sequence, all or part of the amino acid sequences substantially as depicted in Figures 1-14 [SEQ ID NOS:2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, and 28], as well as fragments, analogs and derivatives thereof, including proteins homologous thereto. Manipulations of the NIKl protein and/or NIKl protein-IP sequences, may be made at the protein level. Included within the scope of the present invention are complexes of the NIKl protein or NIKl protein-IP fragments, derivatives, fragments or analogs which are differentially modified during or after translation (e.g., by glycosylation, acetylation, phosphorylation, amidation, derivatization by known protecting/blocking groups, proteolytic cleavage, linkage to an antibody molecule or other cellular ligand, and the like). Any of the numerous chemical modification methodologies known within the art may be utilized including, but not limited to, specific chemical cleavage by cyanogen bromide, trypsin, chymotrypsin, papain, V8 protease, NaBH 4 , acetylation, formylation, oxidation, reduction, metabolic synthesis in the presence of tunicamycin, etc. In a specific embodiment, the NIKl protein and/or NIKl protein-IP sequences are modified to include a fluorescent label. In another specific embodiment, the NIKl protein and/or the NIKl protein-IP are modified by the incorporation of a heterofunctional reagent, wherein such heterofunctional reagent may be used to cross-link the members of the complex. In addition, complexes of analogs and derivatives of the NIKl protein and/or a NIKl protein-IP can be chemically synthesized. For example, a peptide corresponding to a portion of the NIKl protein and/or a NIKl protein-IP, which comprises the desired domain or which mediates the desired activity in vitro (e.g., NIKl protein*NlKl protein-IP complex formation), may be synthesized by use of a peptide synthesizer. In cases where natural products are suspected of being "mutant" or are isolated from new species, the amino acid sequence of the NIKl protein, a NIKl protein-IP isolated from the natural source, as well as those expressed in vitro, or from synthesized expression vectors in vivo or in vitro, may be determined from analysis of the DNA sequence, or alternatively, by direct sequencing of the isolated protein. The NIKl protein*NlKl protein-IP complexes may also be analyzed by hydrophilicity analysis (see e.g., Hopp & Woods, 1981. Proc. Natl. Acad. Sci. USA 78:3824-3828) which can be utilized to identify the hydrophobic and hydrophilic regions of the proteins, thus aiding in the design of substrates for experimental manipulation, such as in binding experiments, antibody synthesis, etc. Secondary structural analysis may also be performed to identify regions of the NIKl protein and/or a NIKl protein-IP which assume specific structural motifs. See e.g., Chou & Fasman, 1974. Biochem. 13:222-223. Manipulation, translation, secondary structure prediction, hydrophilicity and hydrophobicity profiles, open reading frame prediction and plotting, and determination of sequence homologies, can be accomplished using computer software programs available in the art. Other methods of structural analysis including, but not limited to, X-ray crystallography (see e.g., Engstrom, 1974. Biochem. Exp. Biol. 11:7-13); mass spectroscopy and gas chromatography (see e.g., Methods in Protein Science, 1997. J. Wiley and Sons, New York, NY) and computer modeling (see e.g., Fletterick & Zoller, eds., 1986. Computer Graphics and Molecular Modeling, In: Current Communications in Molecular Biology, Cold Spring Harbor Laboratory Press, Cold Spring Harbor, NY) may also be employed. (2) Sequences Encoding IP-1. IP-2. IP-3. IP-4, and IP-5 The present invention discloses the nucleotide sequences of nucleic acids which encode IP-1, IP-2, IP-3, IP-4, or IP-5. In specific embodiments, the nucleic acid sequences of IP-1. IP-2, IP-3, IP-4, and IP-5 nucleic acids are set forth in SEQ ID NOS:17, 19, 21, 23, and 25, respectively; wherein the associated inferred amino acid sequences of these nucleic acids are set forth in SEQ ID NOS: 18, 22, 24, and 26, respectively. The present invention also relates to nucleic acids which are hybridizable or complementary to the aforementioned sequences. In specific aspects, nucleic acids are provided which comprise a sequence complementary to (specifically, are the inverse complement of) at least 10, 25, 50, 100, or 200 nucleotides, or the entire coding region, of an IP-1, IP-2, IP-3, IP-4, or IP-5 gene. In a specific embodiment of the present invention, a nucleic acid which is hybridizable to IP-1, IP-2, IP-3, IP-4, or IP-5nucleic acids (e.g., possessing a sequence which is anti-sense to SEQ ID NOS: 17, 19, 21, 23, or 25, respectively), or derivatives thereof, under conditions of low stringency hybridization is disclosed herein. By way of example, and not of limitation, procedures using such conditions of low stringency hybridization were as follows (see e.g., Shilo & Weinberg, 1981. Proc. Natl. Acad. Sci. USA 78:6789-6792): filters containing DNA were prehybridized for 6 hours at 40°C in a solution containing 35% formamide, 5X SSC, 50 mM Tris-HCl (pH 7.5), 5 mM EDTA, 0.1% PVP, 0.1% Ficoll, 1% BSA, and 500 μg/ml denatured salmon sperm DNA. Hybridizations were carried out in the same solution with the following modifications: 0.02% PVP, 0.02% Ficoll, 0.2% BSA, 100 μg/ml salmon sperm DNA, 10% (wt/vol) dextran sulfate, and 5-20 X 10 6 cpm 32 P-labeled probe. The filters were incubated in the hybridization mixture for 18-20 hours at 40°C and then washed for 1.5 hours at 50°C in a solution containing 2X SSC, 25 mM Tris-HCl (pH 7.4), 5 mM EDTA, and 0.1% SDS. The wash solution was replaced with fresh solution and re-incubated an additional 1.5 hours at 60°C. The filters were blotted dry and autoradiographed. If necessary, the filters were washed for a third time at 65-68°C and re-exposed to film. Other conditions of low stringency hybridizations which are well-known in the art may also be utilized in the practice of the present invention. In another specific embodiment of the present invention, a nucleic acid, which is hybridizable to an IP-1, IP-2, IP-3, IP-4, or IP-5nucleic acid under conditions of moderate stringency is disclosed. By way of example, and not of limitation, the procedure utilized for the moderate stringency hybridization were as follows: filters containing DNA were pre-hybridized for 6 hours at 55°C in a solution containing 6X SSC, 5X Denhart's solution, 0.5% SDS and 100 μ g/ml denatured salmon sperm DNA. Hybridizations were carried out in the same solution with the addition of 5-20 X 10 6 cpm 32 P-labeled probe. The filters were incubated in hybridization mixture for 18-20 hours at 55°C and then washed twice for 30 minutes at 60°C in a solution containing IX SSC and 0.1% SDS. The filters were blotted dry and autoradiographed. Other conditions of moderate stringency which are well-known within the art may also be utilized in the practice of the present invention. In yet other specific embodiment of the present invention, a nucleic acids which is hybridizable to an IP-1, IP-2, IP-3, IP-4, or IP-5 nucleic acid under conditions of high stringency hybridization is disclosed. By way of example, and not of limitation, the procedure utilized for such conditions of high stringency were as follows: pre-hybridization of filters containing DNA was carried out for 8-16 hours at 65 °C in buffer comprised of 6X SSC, 50 mM Tris-HCl (pH 7.5), 1 mM EDTA, 0.02% PVP, 0.02% Ficoll, 0.02% BSA, and 500 μg/ml denatured salmon sperm DNA. The filters were hybridized for 48 hours at 65°C in pre-hybridization mixture containing 100 μg/ml denatured salmon sperm DNA and 5-20 X 10 6 cpm of 32 P-labeled probe. Washing of filters was done at 37°C for 1 hour in a solution containing 2X SSC, 0.01% PVP, 0.01% Ficoll, and 0.01% BSA. This was then followed by a wash in 0.1X SSC at 50°C for 45 minutes prior to autoradiography. Other conditions of high stringency hybridization which well known within the art may also be utilized in the practice of the present invention. Nucleic acids encoding derivatives, fragments and analogs of IP-1, IP-2, IP-3, IP-4, or IP- 5 proteins and IP-1, IP-2, IP-3, IP-4, or IP-5 antisense nucleic acids are additionally disclosed. The amino acid and nucleotide sequences for IP-1, IP-2, IP-3, IP-4, or IP-5 were determined in silico as described above. Any methodology available within the art may be utilized to obtain a full-length (i.e., encompassing the entire coding region) cDNA clone encoding IP-1, IP-2, IP-3, IP-4, or IP-5. For example, the polymerase chain reaction (PCR) may be utilized to amplify the sequence within a cDNA library. Similarly, oligonucleotide primers may also be used to amplify by PCR sequences from a nucleic acid sample (RNA or DNA), preferably a cDNA library, from an appropriate source (e.g., the sample from which the initial cDNA library for the modified yeast two hybrid assay fusion population was derived). PCR may be performed by use of, for example, a Perkin-Elmer Cetus thermal cycler and Taq polymerase. The DNA being amplified is preferably cDNA derived from any eukaryotic species. Several different degenerate primers may be synthesized for use in the PCR reactions. It is also possible to vary the stringency of the hybridization conditions used in priming the PCR reactions, to amplify nucleic acid homologs by allowing for greater or lesser degrees of nucleotide sequence similarity between the known nucleotide sequence and the nucleic acid homolog being isolated. For cross species hybridization, low stringency conditions are preferred; whereas for same species hybridization, moderately stringent conditions are preferred. Any eukaryotic cell may potentially serve as the nucleic acid source for the molecular cloning of the IP-1, IP-2, IP-3, IP-4, or IP-5 sequences. The DNA may be obtained by standard procedures known in the art from cloned DNA (e.g., a DNA "library"), by chemical synthesis, by cDNA cloning, or by the cloning of genomic DNA, or fragments thereof, purified from the desired cell. See e.g., Sambrook, et al, 1989. Molecular Cloning: A Laboratory Manual, 2nd ed, (Cold Spring Harbor Laboratory Press, Cold Spring Harbor, NY); Glover, 1985. DNA Cloning: A Practical Approach (MRL Press, Ltd., Oxford, U.K. Vol. I, II). Clones derived from genomic DNA may contain regulatory and intronic DNA regions in addition to exonic (coding) regions; whereas clones derived from cDNA will contain only exonic sequences. In a preferable embodiment of the present invention, IP-1, IP-2, IP-3, IP-4, or IP-5 nucleic acids are derived from a cDNA source. Identification of the specific cDNA containing the desired sequence may be accomplished in a number of ways. In one methodology, a portion of the IP-1, IP-2, IP-3, IP-4, or IP-5 sequence (e.g., a PCR amplification product obtained as described supra), or an oligonucleotide possessing a sequence of a portion of the known nucleotide sequence, or its specific RNA, or a fragment thereof, may be purified, amplified, and labeled, and the generated nucleic acid fragments may be screened by nucleic acid hybridization utilizing a labeled probe. See e.g., Benton & Davis, 1977. Science 196:180. In a second methodology, the appropriate fragment is identified by restriction enzyme digestion(s) and comparison of fragment sizes with those expected from comparison to a known restriction map (if such is available) or by DNA sequence analysis and comparison to the known nucleotide sequence of IP-1, IP-2, IP-3, IP-4, or IP-5. In a third methodology, the gene of interest may be detected utilizing assays based on the physical, chemical or immunological properties of its expressed product. For example, cDNA clones, or DNA clones which hybrid-select the proper mRNAs, may be selected as a function of their production of a protein which, for example, has similar or identical electrophoretic migration, isolectric focusing behavior, proteolytic digestion maps, antigenic properties or ability to bind the NIKl protein. In a fourth methodology, should an anti-IP-4 or anti-IP-5 antibody be available, the protein of interest may be identified by the binding of a labeled antibody to the putatively IP-1, IP-2, IP-3, IP-4, or IP-5 clone in an enzyme- linked immunosorbent assay (ELISA). In specific embodiments of the present invention, following isolation and identification, the nucleic acids may then be inserted into an appropriate cloning vector including, but are not limited to, bacteriophages (e.g., λ derivatives) or bacterial plasmids (e.g., pBR322, pUC, or the Bluescript® vector (Stratagene; La Jolla, CA). The insertion of the nucleic acid of interest into a cloning vector may be facilitated by, for example, ligating the DNA fragment into a vector possessing complementary cohesive termini or, if there are no complementary cohesive termini present in the cloning vector, the termini of the DNA insert or vector molecule may be enzymatically modified. Alternatively, any restriction site may be produced by the ligation of linker sequences onto the DNA termini; wherein these linker sequences may comprise specific chemically-synthesized oligonucleotides possessing restriction endonuclease recognition sequences. In an additional embodiment, both the cleaved vector and IP-1, IP-2, IP-3, IP-4, or IP-5 sequence may be modified by complementary, homopolymeric tailing. Recombinant molecules may be introduced into host cells via transformation, transfection, infection, electroporation, and the like. In yet another embodiment, the desired gene may be identified and isolated after insertion into a suitable cloning vector in a "shotgun" approach. Enrichment for the desired gene (e.g., by size fractionation) may be done before insertion into the cloning vector. The IP-1 , IP-2, IP-3, IP-4, or IP-5 sequences provided by the instant invention include those nucleotide sequences encoding substantially the same amino acid sequences as found in native IP-1, IP-2, IP-3, IP-4, or IP-5 proteins, and those encoded amino acid sequences with functionally equivalent amino acids, as well as those encoding other IP-1, IP-2, IP-3, IP-4, or IP- 5 derivatives, fragments or analogs. (3) Production of Antibodies to NIKl Protein*NlKl Protein-IP Complexes As disclosed by the present invention herein, NIKl protein*NlKl protein-IP complexes, or derivatives, fragments, analogs or homologs thereof, may be utilized as immunogens in the generation of antibodies which immunospecifically-bind these protein components. Such antibodies include, but are not limited to, polyclonal, monoclonal, chimeric, single chain, F ab fragments and an F ab expression library. In a specific embodiment, antibodies to complexes of human NIKl protein and human NIKl protein-IP are disclosed. In another specific embodiment, complexes formed from fragments of the NIKl protein and a NIKl protein-IP; wherein these fragments contain the protein domain which interacts with the other member of the complex and are used as immunogens for antibody production. Various procedures known within the art may be used for the production of polyclonal or monoclonal antibodies to a NIKl protein*NlKl protein-IP complex, or derivative, fragment, analog or homolog thereof. For the production of polyclonal antibodies, various host animals may be immunized by injection with the native NIKl protein*NlKl protein-IP complex, or a synthetic version, or a derivative of the foregoing (e.g., a cross-linked NIKl protein*NlKl protein-IP). Various adjuvants may be used to increase the immunological response and include, but are not limited to, Freund's (complete and incomplete), mineral gels (e.g., aluminum hydroxide), surface active substances (e.g., lysolecithin, pluronic polyols, polyanions, peptides, oil emulsions, dinitrophenol, etc.) and human adjuvants such as Bacille Calmette-Guerin (BCG) and Corynebacterium parvum. For preparation of monoclonal antibodies directed towards a NIKl protein*NlKl protein- IP complex, or derivatives, fragments, analogs or homologs thereof, any technique which provides for the production of antibody molecules by continuous cell line culture may be utilized. Such techniques include, but are not limited to, the hybridoma technique (see Kohler & Milstein, 1975. Nature 256:495-497); the trioma technique; the human B-cell hybridoma technique (see Kozbor, et al, 1983. Immunol. Today 4:72) and the EBV hybridoma technique to produce human monoclonal antibodies (see Cole, et al, 1985. In: Monoclonal Antibodies and Cancer Therapy (Alan R. Liss, Inc., pp. 77-96). In an additional embodiment of the present invention, monoclonal antibodies may be produced in germ-free animals utilizing recently developed technology. See PCT Publication US 90/02545. Human monoclonal antibodies may be utilized in the practice of the present invention and may be produced by the use of human hybridomas (see Cote, et al, 1983. Proc. Natl. Acad. Sci. USA 80:2026-2030) or by transforming human B-cells with Epstein Barr Virus (EBV) in vitro (see Cole, et al., 1985. In: Monoclonal Antibodies and Cancer Therapy (Alan R. Liss, Inc., pp. 77-96). In an additional embodiment of the present invention, techniques are disclosed for the production of single-chain antibodies (see e.g., U.S. Patent No. 4,946,778) may be adapted for the production of NIKl protein*NlKl protein-IP complex-specific single-chain antibodies. In yet another embodiment, methodologies are disclosed for the construction of F ab expression libraries (see e.g., Huse, et al, 1989. Science 246:1275-1281) to allow rapid and effective identification of monoclonal F ab fragments with the desired specificity for NIKl protein*NlKl protein-IP or derivatives, fragments, analogs or homologs thereof. Furthermore, the present invention discloses methodologies for the "humanization" of non-human antibodies by techniques known within the art. See e.g., U.S. Patent No. 5,225,539). Antibody fragments which contain the idiotypes of NIKl protein*NlKl protein-IP complexes may be produced by techniques known in the art including, but not limited to: (/) the F(ab'), fragment which is produced by pepsin digestion of an antibody molecule; ( /) the Fab fragments which may be generated by the reduction of the disulfide bridges of the F(ab') 2 fragment; (Hi) the F ab fragments which may be generated by the treatment of the antibody molecule with papain and a reducing agent and (iv) F v fragments. In one embodiment of the present invention, methodologies for the screening of antibodies which possess the desired specificity include, but are not limited to, enzyme-linked immunosorbent assay (ELISA) and other immunologically-mediated techniques known within the art. In a specific embodiment, selection of antibodies which are specific to a particular domain of the NIKl protein*NlKl protein-IP complex is facilitated by generation of hybridomas which binds to the fragment of the NIKl protein*NlKl protein-IP complex possessing such a domain. In another specific embodiment, methodologies for the selection of an antibody which specifically-binds a NIKl protein*NlKl protein-IP complex but which does not specifically-bind to the individual proteins of the NIKl protein*NlKl protein-IP complex (by selecting the antibody on the basis of positive-binding to the NIKl protein*NlKl protein-IP complex with a concomitant lack of binding to the individual NIKl protein and NIKl protein-IP proteins) are disclosed herein. Accordingly, antibodies which are specific for a domain within the NIKl protein*NlKl protein-IP complex, or derivative, fragments, analogs or homologs thereof, are also provided herein. The aforementioned antibodies may be used in methods known within the art relating to the localization and/or quantitation of NIKl protein*NlKl protein-IP complexes (e.g., for use in measuring levels of the protein within appropriate physiological samples, for use in diagnostic methods, for use in imaging the protein, and the like). In yet another embodiment of the present invention, anti-NlKl protein*NlKl protein-IP complex antibodies, or derivatives, fragments, analogs or homologs thereof, which possess the protein binding domain, are utilized as pharmacologically-active compounds [hereinafter "Therapeutics"]. (4) Use of NIKl Protein*NlKl Protein-IP Complexes in Diagnosis, Prognosis and Screening NIKl protein*NlKl protein-IP complexes (i.e., particularly the NIKl protein complexed with TrkA, protein phosphatase lα, 14-3-3ε, α-tropomyosin, vimentin, p0071, Ini-1, IP-1, IP-2, IP-3, IP-4, or IP-5), may serve as "markers" for specific disease states which involve the disruption of physiological processes including, but not limited to: (/) cell-cycle progression, cellular apoptosis and/or differentiation; (ii) intracellular signal transduction; (Hi) transcriptional regulation; (iv) metabolism and pathological processes (e.g., hyperproliferative disorders, tumorigenesis and tumor progression, neurodegeneration, vascular disorders, viral infection and various genetic disorder), and thus may have diagnostic utility. In accord, the differentiation and classification of particular groups of patients possessing elevations or deficiencies of a NIKl protein*NlKl protein-IP complex may lead to new nosological classifications of diseases, thus markedly advancing diagnostic ability. The detection of NIKl protein*NlKl protein-IP complex levels, or the levels of the individual proteins which have been shown to form complexes with the NIKl protein, or detecting the levels of the mRNAs which encode the components of the NIKl protein*NlKl protein-IP complexes, may be utilized in diagnosis, prognosis, following the disease course, following the efficacy of administered therapeutics, of disease states, following therapeutic response, etc. Similarly, both the nucleic acid sequences (and sequences complementary thereto) and anti-NlKl protein*NlKl protein-IP complex antibodies and antibodies directed against the individual components that can form NIKl protein*NlKl protein-IP complexes, have uses in diagnostics. Such molecules may be utilized in assays (e.g., immunoassays) to detect, prognose, diagnose, or monitor various conditions, diseases, and disorders characterized by aberrant levels of NIKl protein*NlKl protein-IP complexes, or monitor the treatment thereof. The aforementioned immunoassay may be performed by a methodology comprising contacting a sample derived from a patient with an anti-NlKl protein*NlKl protein-IP complex antibody under conditions such that immunospecific-binding may occur, and subsequently detecting or measuring the amount of any immunospecific-binding by the antibody. In a specific embodiment, an antibody specific for a NIKl protein*NlKl protein-IP complex may be used to analyze a tissue or serum sample from a patient for the presence of NIKl protein*NlKl protein- IP complex; wherein an aberrant level of NIKl protein*NlKl protein-IP complex is indicative of a diseased condition. The immunoassays which may be utilized include, but are not limited to, competitive and non-competitive assay systems using techniques such as Western Blots, radioimmunoassays (RIA), enzyme linked immunosorbent assay (ELISA), "sandwich" immunoassays, immunoprecipitation assays, precipitin reactions, gel diffusion precipitin reactions, immunodiffusion assays, agglutination assays, complement-fixation assays, immunoradiometric assays, fluorescent immunoassays, and protein-A immunoassays, etc. The nucleic acid species of the present invention encoding the associated protein components of the NIKl protein*NlKl protein-IP complexes, and related nucleotide sequences and subsequences, may also be used in hybridization assays. The NIKl protein and NIKl protein-IP nucleotide sequences, or subsequences thereof comprising at least 8 nucleotides, may be used as hybridization probes. Hybridization assays can be used to detect, prognose, diagnose, or monitor conditions, disorders, or disease states associated with aberrant levels of the mRNAs encoding the components of a NIKl protein*NlKl protein-IP complex, as described supra. In specific embodiments of the present invention, diseases and disorders involving or characterized by aberrant levels of NIKl protein*NlKl protein-IP complexes or a predisposition to develop such disorders may be diagnosed by detecting aberrant levels of NIKl protein*NlKl protein-IP complexes, or non-complexed NIKl protein and/or NIKl protein-IP proteins or nucleic acids for functional activity. This aforementioned functional activity may including, but is not restricted to, (i) binding to an interacting partner (e.g., the NIKl protein, TrkA, protein phosphatase lα, 14- 3-3ε, α-tropomyosin, vimentin, p0071, Ini-1, IP-1, IP-2, IP-3, IP-4, or IP-5) or (ii) by detecting mutations in NIKl protein and/or a NIKl protein-IP RNA, DNA or protein (e.g., translocations, truncations, changes in nucleotide or amino acid sequence relative to wild-type NIKl protein and/or the NIKl protein-IP) which can cause increased or decreased expression or activity of the NIKl protein, a NIKl protein-IP or a NIKl protein*:MKl protein-IP complex. Methodologies which are well-known within the art (e.g., immunoassays, nucleic acid hybridization assays, biological activity assays, and the like) may be used to determine whether one or more particular NIKl protein*NlKl protein-IP complexes are present at either increased or decreased levels, or are absent, within samples derived from patients suffering from a particular disease or disorder, or possessing a predisposition to develop such a disease or disorder, as compared to the levels in samples from subjects not having such disease or disorder or predisposition thereto. Additionally, these assays may be utilized to determine whether the ratio of the NIKl protein*NlKl protein-IP complex to the non-complexed components (i.e. the NIKl protein and/or the specific NIKl protein-IP) in the complex of interest is increased or decreased in samples from patients suffering from a particular disease or disorder or having a predisposition to develop such a disease or disorder as compared to the ratio in samples from subjects not having such a disease or disorder or predisposition thereto. Accordingly, in specific embodiments of the present invention, diseases and disorders which involve increased/decreased levels of one or more NIKl protein*NlKl protein-IP complexes may be diagnosed, or their suspected presence may be screened for, or a predisposition to develop such diseases and disorders may be detected, by quantitatively ascertaining increased/decreased levels of: (i) the one or more NIKl protein*NlKl protein-IP complexes; (/ ) the mRNA encoding both protein members of said complex; (/ ' //) the complex functional activity or (iv) mutations in the NIKl protein or the NIKl protein-IP (e.g., translocations in nucleic acids, truncations in the gene or protein, changes in nucleotide or amino acid sequence relative to wild-type NIKl protein or the NIKl protein-IP) which enhance/inhibit or stabilize/destabilize NIKl protein*NlKl protein-IP complex formation. In the practice of the present invention, the use of detection techniques, especially those involving antibodies directed against the NIKl protein*NlKl protein-IP complexes, provide methods for the detection of specific cells which express the protein or protein complex of interest. Using such assays, specific cell types may be quantitatively characterized in which one or more particular NIKl protein*NlKl protein-IP complex are expressed, and the presence of the protein or protein complex may be correlated with cell viability by techniques well-known within the art (e.g., florescence-activated cell sorting (FACS)). Also embodied herein are methodologies directed to the detection of a NIKl protein*NlKl protein-IP complex within in vitro cell culture models which express particular NIKl protein*NlKl protein-IP complexes, or derivatives thereof, for the purpose of characterizing and/or isolating NIKl protein*NlKl protein-IP complexes. These detection techniques include, but are not limited to, cell-sorting of prokaryotes (see e.g., Davey & Kell, 1996. Microbiol Rev. 60:641-696); primary cultures and tissue specimens from eukaryotes, including mammalian species such as human (see e.g., Steele, et al, 1996. Clin. Obstet. Gynecol. 39:801-813) and continuous cell cultures (see e.g., Orfao & Ruiz-Arguelles, 1996. Clin. Biochem. 29:5-9. The present invention additionally provides kits for diagnostic use which are comprised of one or more containers containing an anti-NlKl protein*NlKl protein-IP complex antibody and, optionally, a labeled binding partner to said antibody. The label incorporated into the anti- NIKl protein*NlKl protein-IP complex antibody may include, but is not limited to, a chemiluminescent, enzymatic, fluorescent, colorimetric or radioactive moiety. In an alternative specific embodiment, the kit may comprise, in one or more containers, a pair of oligonucleotide primers (e.g., each 6-30 nucleotides in length) which are capable of acting as amplification primers for: polymerase chain reaction (PCR; see e.g., Innis, et al, 1990. PCR Protocols (Academic Press, Inc., San Diego, CA)); ligase chain reaction; cyclic probe reaction, or other methods known within the art. The kit may, optionally, further comprise a predetermined amount of a purified NIKl protein, NIKl protein-IP or Nek*NlKl protein-IP complex, or nucleic acids thereof, for use as a standard or control in the aforementioned assays. (5) Therapeutic Uses of the NIKl Protein, NIKl Protein-IP and NIKl Protein*NlKl Protein-IP Complexes The present invention provides for treatment or prevention of various diseases and disorders by administration of a biologically-active, therapeutic compound (hereinafter "Therapeutic"). Such Therapeutics include, but are not limited to: ( ) various NIKl protein* NIKl protein-IP complexes (e.g., the NIKl protein complexed with TrkA, protein phosphatase 1 α, 14-3-3ε, α-tropomyosin, vimentin, p0071, Ini-1, IP-1, IP-2, IP-3, IP-4, or IP-5 ) and derivative, fragments, analogs and homologs thereof; (/ ' / ' ) antibodies directed against the aforementioned proteins and protein complexes thereof; (Hi) nucleic acids encoding the NIKl protein and NIKl protein-IPs and derivatives, fragments, analogs and homologs thereof; (iv) antisense nucleic acids encoding the NIKl protein and (V)N1K1 protein IPs and NIKl protein* NIKl protein-IP complex and modulators (i.e., inhibitors, agonists and antagonists) thereof. As previously discussed, the NIKl protein and/or several of its binding partners (i.e., NIKl protein-IPs) have been implicated to play a significant role in disorders of cell-cycle progression, cell differentiation, and transcriptional control, including cancer and tumorigenesis and tumor progression. Disorders of neurodegeneration (e.g., Alzheimer's disease) may also involve the NIKl protein and/or Nek protein-IPs. A wide range of cellular diseases affected by intracellular signal transduction may involve proteins (e.g., the NIKl protein, TrkA, protein phosphatase- lα and 14-3-3ε) and may be treated or prevented by the administration of a Therapeutic which modulates (i.e. inhibits, antagonizes or promotes) NIKl protein*NlKl protein-IP complex activity. Cardiovascular disease may involve α-tropomyosin, IP-2 and IP-5. Aberrant DNA repair and transcriptional control frequently results in a variety of genetic disorders, including xeroderma pigmentosum, Cockayne's syndrome and trichothiodystrophy (see e.g., Seroz, et al, 1995. Curr. Opin. Genet. Dev. 5:217-222), and may involve the NIKl protein, Ini-1, and IP-1. Ini-1 is also putatively involved in viral (e.g., HIV) infection. In addition, TrkA, protein phosphatase- lα, 14-3-3ε, vimentin, IP-4 and IP-1 are specifically implicated in numerous metabolic diseases and disorders. (/ ' ) Disorders with Increased NIKl protein and NIKl protein *N1K1 protein-IP Complex Levels Diseases and disorders which are characterized by increased (relative to a subject not suffering from said disease or disorder) NIKl protein*NlKl protein-IP levels or biological activity may be treated with Therapeutics which antagonize (i.e., reduce or inhibit) NIKl protein •NIKl protein-IP complex formation or activity. Therapeutics which antagonize NIKl protein* NIKl protein-IP complex formation or activity may be administered in a therapeutic or prophylactic manner. Therapeutics which may be utilized include, but are not limited to, the NIKl protein or NIKl protein-IPs, or analogs, derivatives, fragments or homologs thereof; (ii) anti-NlKl protein*NlKl protein-IP complex antibodies; (Hi) nucleic acids encoding the NIKl protein or a NIKl protein-IP; (iv) concurrent administration of a NIKl protein and a NIKl protein-IP antisense nucleic acid and NIKl protein and/or NIKl protein-IP nucleic acids which are "dysfunctional" (i.e., due to a heterologous [non-NlKl protein and/or non-NlKl protein-IP] insertion within the coding sequences of the NIKl protein and NIKl protein-IP coding sequences) are utilized to "knockout" endogenous NIKl protein and/or NIKl protein-IP function by homologous recombination (see e.g., Capecchi, 1989. Science 244:1288-1292). In an additionally embodiment of the present invention, mutants or derivatives of a first NIKl protein- IP which possess greater affinity for NIKl protein than the wild-type first NIKl protein-IP may be administered to compete with a second NIKl protein-IP for binding to the NIKl protein, thereby reducing the levels of complexes between the NIKl protein and the second NIKl protein-IP. Increased levels of NIKl protein*NlKl protein-IP complexes can be readily detected by quantifying protein and/or RNA, by obtaining a patient tissue sample (e.g., from biopsy tissue) and assaying it in vitro for RNA or protein levels, structure and/or activity of the expressed NIKl protein*NlKl protein-IP complex (or the NIKl protein and NIKl protein-IP mRNAs). Methods which are well-known within the art including, but not limited to, immunoassays to detect NIKl protein*NlKl protein-IP complexes (e.g., by Western blot analysis, immunoprecipitation followed by sodium dodecyl sulfate (SDS) polyacrylamide gel electrophoresis, immunocytochemistry, etc.) and/or hybridization assays to detect concurrent expression of the NIKl protein and a NIKl protein-IP mRNAs (e.g., Northern assays, dot blots, in situ hybridization, etc.). (ii) Disorders with Increased NIKl protein and NIKl protein*N!Kl protein-IP Complex Levels A specific embodiment of the present invention discloses methods for the reduction of NIKl protein*NlKl protein-IP complex expression (i.e., the expression of the two protein components of the complex and/or formation of the complex) by targeting mRNAs which express the protein moieties. RNA Therapeutics are, currently, differentiated into three classes: (0 antisense species; (ii) ribozymes or (Hi) RNA aptamers. See e.g., Good, et al, 1997. Gene Therapy 4:45-54. Antisense oligonucleotides have been the most widely utilized and will be discussed, infra. Ribozyme therapy involves the administration (i.e., induced expression) of small RNA molecules with enzymatic ability to cleave, bind, or otherwise inactivate specific RNAs, thus reducing or eliminating the expression of particular proteins. See e.g., Grassi & Marini, 1996. Ann. Med. 28:499-510. At present, the design of "hairpin" and/or "hammerhead" RNA ribozymes are necessary to specifically-target a particular mRNA (e.g., the NIKl protein mRNA). RNA aptamers are specific RNA ligands for proteins, such as for Tat and Rev RNA (see e.g., Good, et al, 1997. Gene Therapy 4:45-54) which can specifically inhibit their translation. In a preferred embodiment of the present invention, the activity or level of the NIKl protein may be reduced by administration of a NIKl protein-IP, a nucleic acid which encodes the NIKl protein-IP or an antibody (or a derivative or fragment of the antibody possessing the binding domain thereof) which immunospecifically-binds to the NIKl protein-IP. Similarly, the levels or activity of a NIKl protein-IP may be reduced by administration of the NIKl protein, a nucleic acid encoding the NIKl protein or an antibody (or a derivative or fragment of the antibody possessing the binding domain thereof) which immunospecifically-binds the NIKl protein. In another embodiment of the present invention, diseases or disorders which are associated with increased levels of the NIKl protein, or a particular NIKl protein-IP, may be treated or prevented by administration of a Therapeutic which increases NIKl protein*NlKl protein-IP complex formation, if said complex formation acts to reduce or inactivate the NIKl protein or the particular NIKl protein-IP via NIKl protein*NlKl protein-IP complex formation. Such diseases or disorders may be treated or prevented by: ( ) the administration of one member of the NIKl protein*NlKl protein-IP complex, including mutants of one or both of the proteins which possess increased affinity for the other member of the NIKl protein*NlKl protein-IP complex (so as to cause increased complex formation) or (ii) the administration of antibodies or other molecules which serve to stabilize the NIKl protein*NlKl protein-IP complex, or the like. (6) Determination of the Biological Effect of the Therapeutic In preferred embodiments of the present invention, suitable in vitro or in vivo assays are utilized to determine the effect of a specific Therapeutic and whether its administration is indicated for treatment of the affected tissue. In various specific embodiments, in vitro assays may be performed with representative cells of the type(s) involved in the patient's disorder, to determine if a given Therapeutic exerts the desired effect upon said cell type(s). Compounds for use in therapy may be tested in suitable animal model systems including, but not limited to rats, mice, chicken, cows, monkeys, rabbits, and the like, prior to testing in human subjects. Similarly, for in vivo testing, any of the animal model system known in the art may be used prior to administration to human subjects. (i) Malignancies Components of the NIKl proteinVNIKI protein-IP complexes (i.e., the NIKl protein, TrkA, protein phosphatase lα, 14-3-3ε, α-tropomyosin, vimentin, p0071, IP-1 (intermediate filament associated protein), IP-2 (tropomyosin homolog), IP-3 (ubiquitin homolog specific hydrolase), IP-4, and IP-5 (a ganglioside-induced differentitation associated protein 1 homolog) are involved in the regulation of cell proliferation. Accordingly, Therapeutics of the present invention may be useful in the therapeutic or prophylactic treatment of diseases or disorders which are associated with cell hyperproliferation and/or loss of control of cell proliferation (e.g., cancers, malignancies and tumors). For a review of such hyperproliferation disorders, see e.g., Fishman, et al, 1985. Medicine, 2nd ed. (J.B. Lippincott Co., Philadelphia, PA). Therapeutics of the present invention may be assayed by any method known within the art for efficacy in treating or preventing malignancies and related disorders. Such assays include, but are not limited to, in vitro assays utilizing transformed cells or cells derived from the patient's tumor, as well as in vivo assays using animal models of cancer or malignancies. Potentially effective Therapeutics, for example, inhibit the proliferation of tumor-derived or transformed cells in culture or cause a regression of tumors in animal models, in comparison to the controls. In the practice of the present invention, once a malignancy or cancer has been shown to be amenable to treatment by modulating (i.e., inhibiting, antagonizing or agonizing) NIKl protein*NlKl protein-IP complex activity, that cancer or malignancy may subsequently be treated or prevented by the administration of a Therapeutic which serves to modulate NIKl protein*NlKl protein-IP complex formation and function, including supplying NIKl protein* :N1K1 protein-IP complexes and the individual binding partners of said protein complex (i.e., the NIKl protein and/or a NIKl protein protein-IP. ( / ' ) Pre-Malignant Conditions The Therapeutics of the present invention which are effective in the therapeutic or prophylactic treatment of cancer or malignancies may also be administered for the treatment of pre-malignant conditions and/or to prevent the progression of a pre-malignancy to a neoplastic or malignant state. Such prophylactic or therapeutic use is indicated in conditions known or suspected of preceding progression to neoplasia or cancer, in particular, where non-neoplastic cell growth consisting of hyperplasia, metaplasia or, most particularly, dysplasia has occurred. For a review of such abnormal cell growth see e.g., Robbins & Angell, 1976. Basic Pathology, 2nd ed. (W.B. Saunders Co., Philadelphia, PA). Hypeφlasia is a form of controlled cell proliferation involving an increase in cell number in a tissue or organ, without significant alteration in its structure or function. For example, it has been demonstrated that endometrial hyperplasia often precedes endometrial cancer. Metaplasia is a form of controlled cell growth in which one type of mature or fully differentiated cell substitutes for another type of mature cell. Metaplasia may occur in epithelial or connective tissue cells; whereas atypical metaplasia involves a somewhat disorderly metaplastic epithelium. Dysplasia is generally considered a precursor of cancer, and is found mainly in the epithelia. Dysplasia is the most disorderly form of non-neoplastic cell growth, and involves a loss in individual cell uniformity and in the architectural orientation of cells. Dysplastic cells often have abnormally large, deeply stained nuclei, and exhibit pleomorphism. Dysplasia characteristically occurs where there exists chronic irritation or inflammation, and is often found in the cervix, respiratory passages, oral cavity, and gall bladder. Alternatively, or in addition to the presence of abnormal cell growth characterized as hyperplasia, metaplasia, or dysplasia, the presence of one or more characteristics of a transformed or malignant phenotype displayed either in vivo or in vitro within a cell sample derived from a patient, is indicative of the desirability of prophylactic/therapeutic administration of a Therapeutic of the present invention which possesses the ability to modulate NIKl protein* NIKl protein-IP complex activity. Characteristics of a transformed phenotype include, but are not limited to: (i) morphological changes; (ii) looser substratum attachment; (Hi) loss of cell-to- cell contact inhibition; (iv) loss of anchorage dependence; (v) protease release; (vi) increased sugar transport; (vii) decreased serum requirement; (viii) expression of fetal antigens, (ix) disappearance of the 250 Kdal cell-surface protein, and the like. See e.g., Richards, et al, 1986. Molecular Pathology (W.B. Saunders Co., Philadelphia, PA). In a specific embodiment of the present invention, leukoplakia (a benign-appearing hyperplastic or dysplastic lesion of the epithelium) or Bowen's disease (a carcinoma in situ) are pre-neoplastic lesions which are illustrative of the desirability of prophylactic intervention to prevent transformation to a frankly malignant phenotype. In another specific embodiment, the Therapeutics of the present invention may be useful in the therapeutic or prophylactic treatment of fibrocystic diseases including, but not limited to, cystic hyperplasia, mammary dysplasia and, particularly, adenosis (benign epithelial hyperplasia). In other preferred embodiments, a patient which exhibits one or more of the following predisposing factors for malignancy is treated by administration of an effective amount of a Therapeutic: (/) a chromosomal translocation associated with a malignancy (e.g., the Philadelphia chromosome (bcr/abl) for chronic myelogenous leukemia and t(14;18) for follicular lymphoma, etc.); (ii) familial polyposis or Gardner's syndrome (possible forerunners of colon cancer); (Hi) monoclonal gammopathy of undetermined significance (MGUS; a possible precursor of multiple myeloma) and (iv) a first degree kinship with persons having a cancer or pre-cancerous disease showing a Mendelian (genetic) inheritance pattern (e.g., familial polyposis of the colon, Gardner's syndrome, hereditary exostosis, polyendocrine adenomatosis, medullary thyroid carcinoma with amyloid production and pheochromocytoma, Peutz-Jeghers syndrome, neurofibromatosis of Von Recklinghausen, retinoblastoma, carotid body tumor, cutaneous melanocarcinoma, intraocular melanocarcinoma, xeroderma pigmentosum, ataxia telangiectasia, Chediak-Higashi syndrome, albinism, Fanconi's aplastic anemia and Bloom's syndrome). In another preferred embodiment, a Therapeutic of the present invention is administered to a human patient to prevent the progression to breast, colon, lung, pancreatic, or uterine cancer, or melanoma or sarcoma. ( //) Hyperproliferative and Dysproliferative Disorders In a preferred embodiment of the present invention, a Therapeutic is administered in the therapeutic or prophylactic treatment of hyperproliferative or benign dysproliferative disorders. The efficacy in treating or preventing hyperproliferative diseases or disorders of a Therapeutic of the present invention may be assayed by any method known within the art. Such assays include in vitro cell proliferation assays, in vitro or in vivo assays using animal models of hyperproliferative diseases or disorders, or the like. Potentially effective Therapeutics may, for example, promote cell proliferation in culture or cause growth or cell proliferation in animal models in comparison to controls. In accord, once a hyperproliferative disorder has been shown to be amenable to treatment by modulation of NIKl protein*NlKl protein-IP complex activity, the hyperproliferative disease or disorder may be treated or prevented by the administration of a Therapeutic which modulates NIKl protein*NlKl protein-IP complex formation (including supplying NIKl protein*NlKl protein-IP complexes and the individual binding partners of a NIKl protein*NlKl protein-IP complex (e.g., the NIKl protein, TrkA, protein phosphatase lα, 14-3-3ε, α-tropomyosin, vimentin, p0071, IP-1, IP-2, IP-3, IP-4, or IP-5). Specific embodiments of the present invention are directed to the treatment or prevention of cirrhosis of the liver (a condition in which scarring has overtaken normal liver regeneration processes); treatment of keloid (hypertrophic scar) formation causing disfiguring of the skin in which the scarring process interferes with normal renewal; psoriasis (a common skin condition characterized by excessive proliferation of the skin and delay in proper cell fate determination); benign tumors; fibrocystic conditions and tissue hypertrophy (e.g., benign prostatic hypertrophy). (iv) Neurodegenerative Disorders Certain binding partners of the NIKl protein (i.e., NIKl protein-IPs) have been implicated in neurodegenerative disease, such as Alzheimer disease, and it appears likely that IP-3 (ubiquitin specific hydrolases homolog) and IP-4 (collagen-homolog) play an important role in these disorders. Accordingly, Therapeutics of the present invention (particularly those which modulate or supply complexes of the NIKl protein and a NIKl protein-IP) may prove effective in treating or preventing neurodegenerative diseases including, but not limited to: Alzheimer disease, Creutzfeuld Jakob disease, Lewy body disease and others. The efficacy of the Therapeutics of the present invention in treating or preventing such neurodegenerative diseases and disorders may be ascertained by any method known within the art for efficacy. Such assays include in vitro assays for regulated cell maturation or inhibition of apoptosis, in vivo assays using animal models of neurodegenerative diseases or disorders, or the like. Potentially effective Therapeutics, for example but not by way of limitation, promote regulated cell maturation and prevent cell apoptosis in culture or reduce neurodegeneration in animal models, in comparison to controls. Once a neurodegenerative disease or disorder has been shown to be amenable to treatment by modulation of NIKl protein*NlKl protein-IP complex activity, that neurodegenerative disease or disorder may be treated or prevented by the administration of a Therapeutic which modulates NIKl protein*NlKl protein-IP complex formation or function. (v) Cardiovascular Disease Cardiomyopathies are serious heart muscle disorders in children and adults, which result in morbidity and premature death. These disorders include hypertrophic cardiomyopathy, dilated cardiomyopathy and restrictive cardiomyopathy. Hypertrophic cardiomyopathy is characterized by left ventricular hypertrophy in the absence of an increased external load, and myofibrillar disarray. Mutations in a total of seven genes, all encoding sarcomeric proteins, have been identified as causes of familial hypertrophic cardiomyopathy, and include those genes encoding cytoskeletal proteins (e.g., α-tropomyosin, β-myosin heavy chain, cardiac troponin-T, myosin binding protein-C, myosin essential light chain, myosin regulatory light chain, troponin I, and probably the tropomyosin-homolog proteins, IP-2 and IP-5. Accordingly, Therapeutics of the present invention, particularly those that modulate or supply NIKl protein*NlKl protein-IP complex activity, may be effective in treating or preventing cardiomyopathy-associated diseases or disorders. A vast array of animal and in vitro cell culture models exist for processes involved in cardiovascular disorders. Potentially effective Therapeutics, for example but not by way of limitation, may be studied in: (/) a murine systems which express mutant tropomyosin or myosin as a model for familial hypertrophic cardiomyopathy (see e.g., Vikstrom, et al, 1996. Mol. Med. 2:556-567); ( ) in a pig model with naturally occurring hypertrophic cardiomyopathy (see e.g., Lee, et al, 1996. FASEB J. 10:1198-1204) or (Hi) in a feline model of hypertrophic cardiomyopathy (see e.g., Fox, et al, 1995. Circulation 92:2645-2651). In accord, once an cardiomyopathy-associated disease or disorder has been shown to be amenable to treatment by modulation of NIKl protein*NlKl protein-IP complex activity, that disease or disorder may be treated or prevented by the administration of a Therapeutic which modulates NIKl protein*NlKl protein-IP complex formation or function. (vi) Viral Infection The NIKl protein binding partner (i.e., a NIKl protein-IP), Ini-1, has been implicated in viral infections. Ini-1 is involved in the integration of the virus HIV-1 into the host genome by interacting with and activating the enzyme, HIV-1 integrase. It has also been shown to interact with the Epstein Barr virus (EBV) nuclear antigen 2. Therapeutics of the present invention, particularly those that modulate or supply NIKl protein:Ini-l complex activity may be effective in treating or preventing viral infections and related diseases and disorders, including HIV infection and AIDS. Therapeutics of the invention (particularly Therapeutics which modulate the levels or biological activity of the NIKl protein:Ini-l complex) may be assayed by any method known within the art to be efficacious in treating or preventing such viral infections and related diseases and disorders. Such assays include in vitro assays for using cell culture models or in vivo assays using animal models of viral diseases or disorders. Potentially effective Therapeutics, for example but not by way of limitation, reduce viral responses in animal models in comparison to controls. Accordingly, once a viral disease or disorder has been shown to be amenable to treatment by modulation of NIKl protein:Ini-l complex activity, that viral disease or disorder may be treated or prevented by the administration of a Therapeutic which modulates NIKl protein*NlKl protein-IP complex formation or function. (vii) Metabolic Diseases and Disorders Several NIKl protein binding partners (i.e., NIKl protein-IPs) have been implicated in metabolic diseases. The Trk oncogene (TrkA) shows an expression deficit in rodent diabetes model; PPl-α controls glycolytic flux in muscles; 14-3-3ε regulates the insulin sensitivity and vimentin has a role in adrenal steroidogenesis. IP-1 (IF-associated protein homolog), IP-3 (ubiquitin-hydroxylase homolog) and IP-4 (collagen-homolog) all appear to have similar or additional roles in metabolic diseases. Therapeutics of the present invention, particularly those which modulate or supply NIKl protein*NlKl protein-IP complex formation and/or activity may be effective in treating or preventing related diseases and disorders. The Therapeutics of the present invention may be assayed by any method known within the art for efficacy in treating or preventing metabolic diseases and disorders. Such assays include in vitro assays for using cell culture models or in vivo assays using animal models of metabolic diseases or disorders. Potentially effective Therapeutics, for example but not by way of limitation, reduce metabolic diseases and their deleterious physiological consequences in animal models, in comparison to controls. Accordingly, once an metabolic disease or disorder has been shown to be amenable to treatment by modulation of NIKl protein*Nek 2 protein IP complex activity, that metabolic disease or disorder may be treated or prevented by the administration of a Therapeutic which modulates NIKl protein*NlKl protein-IP complex formation or function. (7) Gene Therapy In a specific embodiment of the present invention, nucleic acids comprising a sequence which encodes the NIKl protein and/or a NIKl protein-IP, or functional derivatives thereof, are administered to modulate NIKl protein*NlKl protein-IP complex function, by way of gene therapy. In more specific embodiments, a nucleic acid or nucleic acids encoding both the NIKl protein and a NIKl protein-IP (e.g., TrkA, protein phosphatase lα, 14-3-3ε, α-tropomyosin, vimentin, p0071, Ini-1, IP-1, IP-2, IP-3, IP-4, or IP-5), or functional derivatives thereof, are administered by way of gene therapy. Gene therapy refers to therapy which is performed by the administration of a specific nucleic acid to a subject. In this embodiment of the present invention, the nucleic acid produces its encoded protein(s), which then serve to exert a therapeutic effect by modulating NIKl protein*NlKl protein-IP complex function. Any of the methodologies relating to gene therapy available within the art may be used in the practice of the present invention. See e.g., Goldspiel, et al, 1993. Clin. Pharm. 12:488-505. In a preferred embodiment, the Therapeutic comprises a NIKl protein and a NIKl protein-IP nucleic acid which is part of an expression vector expressing both of the aforementioned proteins, or fragments or chimeric proteins thereof, within a suitable host. In a specific embodiment, such a nucleic acid possesses a promoter which is operably-linked to the NIKl protein and the NIKl protein-IP coding region(s), or, less preferably two separate promoters linked to the NIKl protein and the NIKl protein-IP coding regions separately; wherein said promoter is inducible or constitutive, and, optionally, tissue-specific. In another specific embodiment, a nucleic acid molecule is used in which the NIKl protein and NIKl protein-IP coding sequences (and any other desired sequences) are flanked by regions which promote homologous recombination at a desired site within the genome, thus providing for intra- chromosomal expression of the NIKl protein and the NIKl protein-IP nucleic acids. See e.g., Roller & Smithies, 1989. Proc. Natl. Acad. Sci. USA 86:8932-8935. Delivery of the Therapeutic nucleic acid into a patient may be either direct (i.e., the patient is directly exposed to the nucleic acid or nucleic acid-containing vector) or indirect (i.e., cells are first transformed with the nucleic acid in vitro, then transplanted into the patient). These two approaches are known, respectively, as in vivo or ex vivo gene therapy. In a specific embodiment of the present invention, the nucleic acid is directly administered in vivo, where it is expressed to produce the encoded product. This may be accomplished by any of numerous methods known in the art including, but not limited to: (/) constructing it as part of an appropriate nucleic acid expression vector and administering in a manner such that it becomes intracellular (e.g., by infection using a defective or attenuated retroviral or other viral vector ; see U.S. Patent No. 4,980,286) or (ii) direct injection of naked DNA, or through the use of microparticle bombardment (e.g., a "Gene Gun®; Biolistic, Dupont), or by coating it with lipids, cell-surface receptors/transfecting agents, or through encapsulation in liposomes, microparticles, or microcapsules, or by administering it in linkage to a peptide which is known to enter the nucleus, or by administering it in linkage to a ligand predisposed to receptor-mediated endocytosis (see e.g., Wu & Wu, 1987. J. Biol. Chem. 262:4429-4432), which can be used to "target" cell types which specifically express the receptors of interest, etc. In another specific embodiment of the present invention, a nucleic acid-ligand complex may be produced in which the ligand comprises a fusogenic viral peptide designed so as to disrupt endosomes, thus allowing the nucleic acid to avoid subsequent lysosomal degradation. In yet another specific embodiment, the nucleic acid may be targeted in vivo for cell-specific endocytosis and expression, by targeting a specific receptor. See e.g., PCT Publications WO 92/06180; WO93/14188 and WO 93/20221. Alternatively, the nucleic acid may be introduced intracellularly and incorporated within host cell genome for expression by homologous recombination. See e.g., Zijlstra, et al, 1989. Nature 342:435-438. In yet another specific embodiment, a viral vector which contains the NIKl protein and/or the NIKl protein-IP nucleic acids is utilized. For example, retroviral vectors may be employed (see e.g., Miller, et al, 1993. Meth. Enzymol. 217:581-599) which have been modified to delete those retroviral-specific sequences which are not required for packaging of the viral genome and its subsequent integration into host cell DNA. The NIKl protein and/or NIKl protein-IP (preferably both protein species) nucleic acids are cloned into the vector, which facilitates delivery of the genes into a patient. See e.g., Boesen, et al, 1994. Biotherapy 6:291-302; Kiem, et al, 1994. Blood 83: 1467- 1473. Additionally, adenovirus is an especially efficacious "vehicle" for the delivery of genes to the respiratory epithelia. Other targets for adenovirus-based delivery systems are liver, the central nervous system, endothelial cells, and muscle. Adenoviruses also possess the advantageous ability to infect non-dividing cells. For a review see e.g., Kozarsky & Wilson, 1993. Curr. Opin. Gen. Develop. 3:499-503. Adenovirus-associated virus (AAV) has also been proposed for use in gene therapy. See e.g., Walsh, et al, 1993. Proc. Soc. Exp. Biol. Med. 204:289-300. An additional approach to gene therapy in the practice of the present invention involves transferring a gene into cells in in vitro tissue culture by such methods as electroporation, lipofection, calcium phosphate-mediated transfection, or viral infection. Generally, the methodology of transfer includes the transfer of a selectable marker to the cells. The cells are then placed under selection pressure (e.g., antibiotic resistance) so as facilitate the isolation of those cells which have taken up, and are expressing the transferred gene. Those cells are then delivered to a patient. In this specific embodiment, the nucleic acid is introduced into a cell prior to the in vivo administration of the resulting recombinant cell by any method known within the art including, but not limited to: transfection, electroporation, microinjection, infection with a viral or bacteriophage vector containing the nucleic acid sequences of interest, cell fusion, chromosome-mediated gene transfer, microcell-mediated gene transfer, spheroplast fusion, and similar methodologies which ensure that the necessary developmental and physiological functions of the recipient cells are not disrupted by the transfer. See e.g., Loeffler & Behr, 1993. Meth. Enzymol 217: 599-618. The technique should provide for the stable transfer of the nucleic acid to the cell, so that the nucleic acid is expressible by the cell and preferably heritable and expressible by its cell progeny. In preferred embodiments of the present invention, the resulting recombinant cells may be delivered to a patient by various methods known within the art including, but not limited to: injection of epithelial cells (e.g., subcutaneously); the application of recombinant skin cells as a skin graft onto the patient and the intravenous injection of recombinant blood cells (e.g., hematopoetic stem or progenitor cells). The total amount of cells which are envisioned for use depend upon the desired effect, patient state, etc., and may be determined by one skilled within the art. Cells into which a nucleic acid can be introduced for purposes of gene therapy encompass any desired, available cell type, and include but are not limited to epithelial cells, endothelial cells, keratinocytes, fibroblasts, muscle cells, hepatocytes and blood cells (e.g., T-lymphocytes, B-lymphocytes, monocytes, macrophages, neutrophils, eosinophils, megakaryocytes, granulocytes and hematopoetic stem or progenitor cells obtained from bone marrow, umbilical cord blood, peripheral blood, fetal liver, etc.). In a preferred embodiment of the present invention, the cell utilized for gene therapy may be autologous to the patient. In a specific embodiment in which recombinant cells are used in gene therapy, stem or progenitor cells, which can be isolated and maintained in vitro, may be utilized. Such stem cells include, but are not limited to, hematopoetic stem cells (HSC), stem cells of epithelial tissues (e.g., skin, lining of the gut, embryonic heart muscle cells, liver stem cells) and neural stem cells (see e.g., Stemple & Anderson, 1992. Cell 71:973-985). With respect to hematopoetic stem cells (HSC), any technique which provides for the isolation, propagation, and maintenance in vitro of HSC may be used in this specific embodiment of the invention. As previously discussed, the HSCs utilized for gene therapy are, preferably, autologous to the patient. Hence, non-autologous HSCs are, preferably, utilized in conjunction with a method of suppressing transplantation immune reactions of the future host/patient. See e.g., Kodo, et al, 1984. J. Clin. Invest. 73:1377- 1384. In another preferred embodiment of the present invention, HSCs may be highly enriched (or produced in a substantially-pure form), by any techniques known within the art, prior to administration to the patient. See e.g., Witlock & Witte, 1982. Proc. Natl. Acad. Sci. USA 79:3608-3612. (8) Utilization of Anti-Sense Oligonucleotides In a specific embodiment of the present invention, NIKl protein*NlKl protein-IP complex formation and function may be inhibited by the use of anti-sense nucleic acids for the NIKl protein and/or a NIKl protein-IP (e.g., TrkA, protein phosphatase lα, 14-3-3ε, α- tropomyosin, vimentin, p0071, Ini-1, IP-1, IP-2, IP-3, IP-4, or IP-5 ), and is preferably comprised of both the NIKl protein and the NIKl protein-IP. In addition, the present invention discloses the therapeutic or prophylactic use of nucleic acids (of at least six nucleotides in length) which are anti-sense to a genomic sequence (gene) or cDNA encoding the NIKl protein and/or a NIKl protein-IP, or portions thereof. Such anti-sense nucleic acids have utility as Therapeutics which inhibit NIKl protein*NlKl protein-IP complex formation or activity, and may be utilized in a therapeutic or prophylactic manner. Another specific embodiment of the present invention discloses methodologies for the inhibition of the expression of the NIKl protein and a NIKl protein-IP nucleic acid sequences, within a prokaryotic or eukaryotic cell, which is comprised of providing the cell with an therapeutically-effective amount of an anti-sense nucleic acid of the NIKl protein and a NIKl protein-IP, or derivatives thereof. The anti-sense nucleic acids of the present invention may be oligonucleotides which may either be directly administered to a cell or which may be produced in vivo by transcription of the exogenous, introduced sequences. In addition, the anti-sense nucleic acid may be complementary to either a coding (i.e., exonic) and/or non-coding (i.e., intronic) region of the NIKl protein or NIKl protein-IP mRNAs. The NIKl protein and NIKl protein-IP anti-sense nucleic acids are, at least, six nucleotides in length and are, preferably, oligonucleotides ranging from 6-200 nucleotides in length. In specific embodiments, the anti-sense oligonucleotide is at least 10 nucleotides, at least 15 nucleotides, at least 100 nucleotides, or at least 200 nucleotides. The anti-sense oligonucleotides may be DNA or RNA (or chimeric mixtures, derivatives or modified versions thereof), may be either single-stranded or double-stranded and may be modified at a base, sugar or phosphate backbone moiety. In addition, the anti-sense oligonucleotide of the present invention may include other associated functional groups, such as peptides, moieties which facilitate the transport of the oligonucleotide across the cell membrane, a hybridization-triggered cross-linking agent, a hybridization-triggered cleavage-agent, and the like. See e.g., Letsinger, et al, 1989. Proc. Natl. Acad. Sci. U.S.A. 86:6553-6556; PCT Publication No. WO 88/09810. In a specific embodiment, the NIKl protein and NIKl protein-IP antisense oligonucleotides comprise catalytic RNAs or ribozymes. See, e.g., Sarver, et al, 1990. Science 247:1222-1225. The anti-sense oligonucleotides of the present invention may be synthesized by standard methodologies known within the art including, but not limited to: (/) automated phosphorothioate-mediated oligonucleotide synthesis (see e.g., Stein, et al, 1988. Nuc. Acids Res. 16:3209) or (/ ' /) methylphosphonate oligonucleotides can be prepared by use of controlled pore glass polymer supports (see e.g., Sarin, et al, 1988. Proc. Natl. Acad. Sci U.S.A. 85:7448-7451). In an alternative embodiment, the NIKl protein and NIKl protein-IP antisense nucleic acids are produced intracellularly by transcription of an exogenous sequence. For example, a vector may be produced which (upon being exocytosed by the cell) is transcribed in vivo, thus producing an antisense nucleic acid (RNA) species. The aforementioned vector may either remain episomal or become chromosomally-integrated, so long as it can be transcribed to produce the desired antisense RNA. The vectors utilized in the practice of the present invention may be derived from bacterial, viral, yeast or other sources known within the art, which are utilized for replication and expression in mammalian cells. Expression of the sequences encoding the NIKl protein and NIKl protein-IP antisense RNAs may be facilitated by any promoter known within the art to function in mammalian, preferably, human cells. Such promoters may be inducible or constitutive and include, but are not limited to: (/ ' ) the SV40 early promoter region; (ii) the promoter contained in the 3 '-terminus long terminal repeat of Rous sarcoma virus (RSV); (Hi) the Herpesvirus thymidine kinase promoter and (iv) the regulatory sequences of the metallothionein gene. The NIKl protein and NIKl protein-IP antisense nucleic acids may be utilized prophylactically or therapeutically in the treatment or prevention of disorders of a cell type which expresses (or preferably over-expresses) the NIKl protein*NlKl protein-IP complex. Cell types which express or over-express the NIKl protein and NIKl protein-IP RNA, or IP-1, IP-2, IP-3, IP-4, or IP-5 RNA, may be identified by various methods known within the art including, but are not limited to, hybridization with NIKl protein- and NIKl protein-IP-specific nucleic acids (e.g., by Northern hybridization, dot blot hybridization, in situ hybridization) or by observing the ability of RNA from the specific cell type to be translated in vitro into the NIKl protein and the NIKl protein-IP by immunohistochemistry. In a preferred aspect, primary tissue from a patient may be assayed for the NIKl protein and/or NIKl protein-IP expression prior to actual treatment by, for example, immunocytochemistry or in situ hybridization. Pharmaceutical compositions of the present invention, comprising an effective amount of a NIKl protein and a NIKl protein-IP antisense nucleic acid contained within a pharmaceutically-acceptable carrier may be administered to a patient having a disease or disorder which is of a type that expresses or over-expresses NIKl protein*NlKl protein-IP complex RNA or protein. The amount of NIKl protein and/or NIKl protein-IP antisense nucleic acid which will be effective in the treatment of a particular disorder or condition will be dependant upon the nature of the disorder or condition, and may be determined by standard clinical techniques. Where possible, it is desirable to determine the antisense cytotoxicity in vitro, and then in useful animal model systems prior to testing and use in humans. In a specific embodiment, pharmaceutical compositions comprising NIKl protein and NIKl protein-IP antisense nucleic acids may be administered via liposomes, microparticles, or microcapsules. See e.g., Leonetti, et al, 1990. Proc. Natl. Acad. Sci. U.S.A. 87:2448-2451. (9) NIKl Protein*NlKl Protein-IP Complex Assays The functional activity of NIKl protein*NlKl protein-IP complexes (and derivatives, fragments, analogs and homologs thereof) may be assayed by a number of methods known within the art. For example, putative modulators (e.g., inhibitors, agonists and antagonists) of NIKl protein*NlKl protein complex activity (e.g., anti-NlKl protein*NlKl protein-IP complex antibodies, as well as NIKl protein or NIKl protein-IP antisense nucleic acids) may be assayed for their ability to modulate NIKl protein*NlKl protein-IP complex formation and/or activity. ( ) Immunoassays In a specific embodiment of the present invention, immunoassay-based methodologies are disclosed where one is assaying for: (i) the ability to bind to, or compete with, wild-type NIKl protein*NlKl protein-IP complex or IP-1, IP-2, IP-3, IP-4, or IP-5 or (ii) the ability to bind to an anti-NlKl protein*NlKl protein-IP complex antibody. These immunoassays include, but are not limited to, competitive and non-competitive assay systems utilizing techniques such as radioimmunoassays, enzyme linked immunosorbent assay(ELISA), "sandwich" immunoassays, immunoradiometric assays, gel diffusion precipitin reactions, immunodiffusion assays, in situ immunoassays (e.g., using colloidal gold, enzyme or radioisotope labels), Western blots, Northwestern blots, precipitation reactions, agglutination assays (e.g., gel agglutination assays, hemagglutination assays), complement fixation assays, immunofluorescence assays, protein-A assays and immunoelectrophoresis assays, and the like. In one specific embodiment of the present invention, antibody binding is detected by assaying for a label on the primary antibody. In another specific embodiment, the binding of the primary antibody is ascertained by the detection of the binding of a secondary antibody (or reagent) specific for the primary antibody. In a further embodiment, the secondary antibody is labeled. (/ ) Gene Expression Assays The expression of the NIKl protein or NIKl protein-IP genes (both endogenous genes and those expressed from recombinant DNA) may be detected using techniques known within the art including, but not limited to: Southern hybridization, Northern hybridization, restriction endonuclease mapping, DNA sequence analysis and polymerase chain reaction amplification (PCR) followed by Southern hybridization or RNase protection (see e.g., Current Protocols in Molecular Biology 1997. (John Wiley and Sons, New York, NY)) with probes specific for the NIKl protein and NIKl protein-IP genes in various cell types. In one specific embodiment of the present invention, Southern hybridization may be used to detect genetic linkage of the NIKl protein and/or NIKl protein-IP gene mutations to physiological or pathological states. Numerous cell types, at various stages of development, may be characterized for their expression of the NIKl protein and a NIKl protein-IP (particularly the concomitant expression of the NIKl protein and NIKl protein-IP within the same cells). The stringency of the hybridization conditions for Northern or Southern blot analysis may be manipulated to ensure detection of nucleic acids with the desired degree of relatedness to the specific probes used. Modification of these aforementioned methods, as well as other methods well-known within the art, may be utilized in the practice of the present invention. (Hi) Binding Assays Derivatives, fragments, analogs and homologs of NIKl protein-IPs may be assayed for binding to the NIKl protein by any method known within the art including, but not limited to: ( ) the modified yeast two hybrid assay system; (ii) immunoprecipitation with an antibody which binds to the NIKl protein within a complex, followed by analysis by size fractionation of the immunoprecipitated proteins (e.g., by denaturing or non-denaturing polyacrylamide gel electrophoresis); (Hi) Western analysis; (v) non-denaturing gel electrophoresis, and the like. (/ ) Assays for Biological Activity A specific embodiment of the present invention provides a methodology for the screening of a derivative, fragment, analog or homolog of the NIKl protein for biological activity which is comprised of contacting a derivative, fragment, analog or homolog of the NIKl protein with one of the NIKl Protein-IPs (e.g., TrkA, protein phosphatase lα, 14-3-3ε, α-tropomyosin, vimentin, p0071, Ini-1, IP-1, IP-2, IP-3, IP-4, or IP-5) and detecting the formation of a complex between said derivative, fragment, analog or homolog of the NIKl protein and the specific NIKl protein- IP; wherein the detection of the formation of said complex indicates that the NIKl protein derivative, fragment, analog or homolog, possesses biological (e.g., binding) activity. Similarly, an additional embodiment discloses a methodology for the screening a derivative, fragment, analog or homolog of a NIKl protein-IP for biological activity comprising contacting said derivative, fragment, analog or homolog of said protein with the NIKl protein; and detecting the formation of a complex between said derivative, fragment, analog or homolog of the NIKl protein-IP and the NIKl protein; wherein detecting the formation of said complex indicates that said the NIKl protein-IP derivative, fragment, analog, or homolog possesses biological activity. (10) Modulation of NIKl Protein*NlKl Protein-IP Complex Activity The present invention discloses methodologies relating to the modulation of the activity of a protein moiety which possesses the ability to participate in a NIKl protein*NlKl protein-IP complex (e.g., the NIKl protein of TrkA, protein phosphatase lα, 14-3-3, α-tropomyosin, vimentin, p0071, Ini-1 , IP-1, IP-2, IP-3, IP-4, or IP-5) by the administration of a binding partner of that protein (or derivative, fragment, analog or homolog thereof). The NIKl protein (and derivatives, fragments, analogs and homologs thereof) may be assayed for their ability to modulate the activity or levels of a NIKl protein-IP by contacting a cell, or administering to an animal expressing a NIKl protein-IP gene, with the NIKl protein, or a nucleic acid encoding the NIKl protein or an antibody which immunospecifically-binds the NIKl protein, or a derivative, fragment, analog or homolog of said antibody which contains the binding domain thereof, and measuring a change in NIKl protein-IP levels or activity; wherein a change in NIKl protein-IP levels or activity indicates that the NIKl protein possesses the ability to modulate NIKl protein- IP levels or activity. In another embodiment, a NIKl protein-IP may be assayed for the ability to modulate the activity or levels of the NIKl protein in an analogous manner. In a specific embodiment, the NIKl protein is active as a protein phosphatase which phosphorylates serine/threonine residues of proteins involved early in the cell-cycle. Accordingly, proteins and protein complexes of the present invention may be screened for the ability to modulate (i.e., increase or decrease) effects on critical cell-cycle proteins. For example, the NIKl protein has been shown to interact with retinoblastoma protein. Hence, the proteins and protein complexes of the present invention may be screened by assaying for changes in the level of retinoblastoma protein phosphorylation, and the like. See e.g., Milne, et al, 1994. J. Biol. Chem. 269:9253-9260. Furthermore, the NIKl protein has been shown to be associated with the centrosome during the cell-cycle, including all stages of mitosis. See e.g., Fry, et al, 1998. EMBO J. 17:470-481. Accordingly, the protein and protein complexes of the present invention may be screened for the ability to modulate (i.e., increase or decrease) effects on the centrosome. In addition, TrkA is an essential component of the signal transducing receptor which mediates the biological properties of the nerve growth factor (NGF) family of neutrophins. Other TrkA substrates include: phospholipase C, PI-3 kinase, SHP-2, Ras GTPase activating protein, and ERK. TrkA is implicated in the growth of many tumors, including, but not limited to, those of the nervous system, colon carcinomas, thyroid tumors, and melanomas. Therefore, the proteins and protein complexes of the present invention may be screened for the ability to modulate (i.e., increase or decrease) the ability of TrkA to effect the biological properties and functions of its substrates. Protein phosphatase lα (PP lα) is a protein phosphatase affecting several signal transduction processes, including cell-cycle progression and neurotransmitter receptor activity. In particular, PPlα interacts with several proteins, including the retinoblastoma protein, Hoxl 1, DARPP-32, and toxins. Accordingly, the proteins and protein complexes of the present invention may be screened for the ability to modulate effects of PP l on these proteins. The 14-3-3ε protein associates with a range of cellular proteins involved in signal transduction and/or cell-cycle regulation and oncogenesis. In addition, 14-3-3ε is present in the brains of patients with Alzheimer's disease and Creutzfeldt- Jakob disease. Accordingly, complexes and proteins of the invention can be screened for the ability to modulate effects of 14-3-3ε on cell-cycle regulation and neurodegenerative diseases and disorders. The ubiquitin specific hydrolase-homolog protein, IP-3, is implicated in degradation of cellular proteins. Accordingly, the proteins and protein complexes of the present invention may be screened for the ability to modulate the putative ability of IP-3 to influence degradation of cellular proteins. Alpha-tropomyosin is a structural protein of the muscle which binds to actin and/or troponin and the homolog protein, IP-2, have been shown to possess similar properties. Tropomyosins are found to be down-regulated in malignantly transformed cells and other tumors and a mutation in the gene for α-tropomyosin (and other structural cytoskeletal proteins) has been identified as cause of familial hypertrophic cardiomyopathy. Accordingly, complexes and proteins of the invention can be screened for the ability to modulate the expression of, and ability of α-tropomyosin, IP-2, to bind to actin and/or troponin. The vimentin protein assembles to intermediate filaments. Vimentin filaments have been demonstrated in many tumors and vimentin is believed to be involved in migration, invasion and metastasis. Accordingly, the proteins and protein complexes of the present invention may be screened for the ability to modulate the ability of vimentin to assemble to intermediate filaments, as well as to modulate the effects of vimentin on tumor migration, invasion and metastasis. In addition, vimentin may be utilized as marker for different cancers. IP-1 is a protein homolog to intermediate filament associated proteins and homolog to keratins. Intermediate filaments are found in many tumors and are believed to be involved in migration, invasion and metastasis. Accordingly, the proteins and protein complexes of the present invention may be screened for the ability to modulate the ability of IP-1 to associate with intermediate filaments, as well as the ability to modulate the effects of IP-1 on tumor migration, invasion and metastasis. In addition, IP-1 may be utilized as marker for different cancers. The p0071 protein (an Armadillo protein) is associated with the cell-cell adherens junctional plaque (desmosomes). Accordingly, the proteins and protein complexes of the present invention may be screened for the ability to modulate the ability of p0071 to associate with desmosomal plaques. In addition, both NIKl protein*NlKl protein-IP complexes and individual NIKl protein-IPs may be screened by assaying for changes in levels of p0071 -association with the desmosomal plaque (e.g., by immunoassays with anti-p0071 antibodies). Integrase interactor 1 (Ini-1) protein has been demonstrated to interact with and activate HIV-1 integrase. Accordingly, the proteins and protein complexes of the present invention may be screened for the ability to modulate the ability of Ini-1 to influence the HIV-1 integration and replication. (11) NlKl-Related Treatment Assays (z) Tumorigenesis The NIKl protein, and several of the identified binding partners of the NIKl protein (i.e., NIKl protein-IPs) have roles in the control of cell proliferation and, therefore, cell- transformation and tumorigenesis. Accordingly, the present invention discloses methodologies for screening NIKl protein*NlKl protein-IP complexes and NIKl protein-IPs (and derivatives, fragments, analogs and homologs, thereof) for the ability to alter cell proliferation, cell transformation and/or tumorigenesis in vitro and in vivo. For example, but not by way of limitation, cell proliferation may be assayed by measuring 3 H-thymidine incorporation, by direct cell count, by detecting changes in transcriptional activity of known genes such as proto- oncogenes (e.g., c-fos, c-myc) cell-cycle markers, and the like. The NIKl protein*NlKl protein-IP complexes and NIKl protein-IPs (and derivatives, fragments, analogs and homologs, thereof) may also be screened for activity in inducing or inhibiting cell transformation (or the progression to malignant phenotype) in vitro. The proteins and protein complexes of the present invention may be screened by contacting either cells with a normal phenotype (for assaying for cell transformation) or a transformed cell phenotype (for assaying for inhibition of cell transformation) with the protein or protein complex of the present invention and examining the cells for acquisition or loss of characteristics associated with a transformed phenotype (a set of in vitro characteristics associated with a tumorigenic ability in vivo) including, but not limited to: colony formation in soft agar, a more rounded cell morphology, looser substratum attachment, loss of contact inhibition, loss of anchorage dependence, release of proteases such as plasminogen activator, increased sugar transport, decreased serum requirement, expression of fetal antigens, disappearance of the 250 Kdal cell- surface protein, and the like. See e.g., Luria, et al, 1978. General Virology, 3rd ed. (John Wiley & Sons, New York, NY). The NIKl protein*NlKl protein-IP complexes (and derivatives, fragments, analogs and homologs, thereof) may also be screened for activity to promote or inhibit tumor formation in vivo in non-human test animal. A vast number of animal models of hyperproliferative disorders (e.g., tumorigenesis and metastatic spread) are known within the art. See e.g., Lovejoy, et al, 1997. J. Pathol 181 :130-135. In a specific embodiment of the present invention, the proteins and protein complexes may be administered to a non-human test animal (preferably a test animal predisposed to develop a type of tumor) and the non-human test animals is subsequently examined for an increased incidence of tumor formation in comparison with controls animals which were not administered the proteins or protein complex of the present invention. Alternatively, the proteins and protein complexes may be administered to non-human test animals possessing tumors (e.g., animals in which tumors have been induced by introduction of malignant, neoplastic, or transformed cells or by administration of a carcinogen) and subsequently examining the tumors within the test animals for tumor regression in comparison to controls. Accordingly, once a hyperproliferative disease or disorder has been shown to be amenable to treatment by modulation of NIKl protein*NlKl protein-IP complex activity that disease or disorder may be treated or prevented by administration of a Therapeutic which modulates NIKl protein*NlKl protein-IP complex formation. (ii) Neurodegenerative Diseases In an embodiment of the present invention, a Therapeutic of the present invention may be assayed for activity in the treatment or prevention of neurodegenerative disease by administering the Therapeutic to: (/) culture cells in vitro or (ii) a test animal, such as but not limited to the PDAPP transgenic mouse model of Alzheimer disease (see e.g., Johnson- Wood, et al, 1997. Proc. Natl. Acad. Sci. USA 94:1550-1555), which exhibits symptoms of a neurodegenerative disease, or that is predisposed to develop symptoms of a neurodegenerative disease, and measuring the change in said symptoms or predisposition of the neurodegenerative disease after the administration of said Therapeutic; wherein a reduction in the predisposition or the severity of the symptoms of the neurodegenerative or prevention of the symptoms of the neurodegenerative disease indicates that the Therapeutic possesses activity in treating or preventing neurodegenerative disease. Specific embodiments of such cultured cell models for neurodegenerative disease include, but are not limited to: cultured rat endothelial cells from affected and unaffected individual humans (see e.g., Maneiro, et al, 1997. Methods Find. Exp. Clin. Pharmacol. 19:5- 12) including, but not limited to, cultured rat endothelial cells from affected and unaffected individual humans (see e.g., Maneiro, et al, 1997. Methods Find. Exp. Clin. Pharmacol 19:5- 12); P19 murine embryonic carcinoma cells (see e.g., Hung, et al, 1992. Proc Natl Acad Sci USA 89:9439-9443) and dissociated cell cultures of cholinergic neurons from nucleus basalis of Meynert (see e.g., Nakajima, et al, 1985. Proc Natl Acad Sci USA 82:6325-6329). Specific embodiments of such test animal models neurodegenerative disease include, but are not limited to: partial trisomy 16 mouse (see e.g., Holtzman, et al, 1996. Proc. Natl. Acad. Sci. USA 93:13333-13338); bilateral nucleus basalis magnocellularis-lesioned rats (see e.g., Popovic, et al, 1996. Int. J. Neurosci 86:281-299); the aged rat (see e.g., Muir, 1997. Pharmacol. Biochem. Behav. 56:687-696); the PDAPP transgenic mouse model of Alzheimer disease (see e.g., Johnson- Wood, et al, 1997. Proc. Natl. Acad. Sci. USA 94:1550-1555) and experimental autoimmune dementia (see e.g., Oron, et al, 1997. J. Neural. Transm. 49:77-84). Accordingly, once a neurodegeneration disease or disorder has been shown to be amenable to treatment by modulation of NIKl protein*NlKl protein-IP complex activity, that disease or disorder may be treated or prevented by administration of a Therapeutic which modulates NIKl protein*NlKl protein-IP complex formation and/or biological function. (Hi) Cardiomyopathy As previously discussed, α-tropomyosin and is implicated in hypertrophic cardiomyopathy and associated disorders. Furthermore, due to their overall degree of homology to α-tropomyosin, the IP-2 protein may also be implicated in these aforementioned disorders. Accordingly, in one embodiment of the present invention, a Therapeutic may be assayed for activity in treating or preventing cardiomyopathy (and associated disorders) by contacting: ( ) cultured cells in vitro or (ii) animal models which exhibit an indicator or symptoms of cardiomyopathy with the Therapeutic, and subsequently comparing the level of said indicator in the cells or symptoms of the test animals contacted with the Therapeutic, with the level of said indicator in cells or symptoms in test animals not so contacted; wherein a diminution of these level in said contacted cells or test animals indicates that the Therapeutic possesses activity in treating or preventing cardiomyopathy and associated disorders. Examples of cultured cells utilized in the practice of the present invention include, but are not limited to: cultured cardiac myocytes from neonates or adults (see e.g., Wall, et al, 1996. Eur. J. Pharmacol. 306:165-174) and cultured autoreactive T-lymphocytes in autoimmune myocarditis (see e.g., Perez-Leiros, et al, 1997. Neuroimmunomodulation 4:91-97). In another embodiment of the present invention, examples of test animals which may be utilized for the determination of whether a Therapeutic possesses activity in treating or preventing cardiomyopathy include, but not limited to: the aryl-hydrocarbon receptor-deficient mouse model of cardiomyopathy (see e.g., Fernandez-Salguero, et al, 1997. Vet. Pathol. 34:605-614); experimental autoimmune myocarditis in mice (see e.g., Perez-Leiros, et al, 1997. Neuroimmunomodulation 4:91-97), transgenic mice over-expressing tropomodulin (see e.g., Sussman, et al, 1998. J Clin. Invest. 101 :51-61); guinea pigs immunized with adenine nucleotide transporter type I (see e.g., Dorner, et al, 1997. Mol. Cell. Biochem. 114:261-269) and MLP-deficient mice (see e.g., Arber, et al, 1997. Cell 88:393-403). (iv) Viral Infection The NIKl protein interactant (NIKl protein-IP), Ini-1, is strongly implicated in viral infection mechanisms, including that for the AIDS virus, HIV-1. An enormous number of human diseases result from virulent and opportunistic viral infection. Accordingly, the N1K1- related proteins and protein complexes, nucleic acids, and antibodies of the present invention may be tested for activity in treating or preventing viral diseases by the use of in vitro and in vivo assays. Specifically, a Therapeutic of the present invention may be assayed for activity in the treatment or prevention of viral disease and/or infection by contacting: (i) cultured cells in vitro or (ii) animals models which exhibit an indicator or symptoms a viral infection reaction with the Therapeutic, and comparing the level of said indicator in the cells or symptoms in the test animals contacted with the Therapeutic with said level of said indicator in cells or symptoms in the test animals not so contacted; wherein a lower level in said contacted cells or test animals indicates that the Therapeutic possesses activity in treating or preventing viral infection and/or disease. In vitro cell culture models which may be used for such assays include, but are not limited to: viral infection of T-lymphocytes (see e.g., Selin, et al, 1996. J Exp. Med. 183:2489- 2499); hepatitis B infection of dedifferentiated hepatoma cells (see e.g., Raney, et al, 1997. J. Virol. 71:1058-1071) and synchronous HIV-1 infection of CD4 + lymphocytic cell lines (see e.g., Wainberg, et al, 1997. Virology 233:364-373). Animal models of the present invention which can be utilized for such assays include, but are not limited to: neurotrophic virus infection of mice (see e.g., Barna, et al, 1996. Virology 223:331-343); encephalomyocarditis infection of mice (see e.g., Hirasawa, et al, 1997. J. Virol. 71:4024-4031) and cytomegalovirus (CMV) infection of mice (see e.g., Orange & Biron, 1996. J. Immunol. 156:1138-1142). (v) Metabolic Disorders In specific embodiments of the present invention, NIKl -related proteins, protein complexes, nucleic acids, and antibodies (as well as derivatives, fragments, analogs and homologs thereof) may be tested for activity in the treatment or prevention of diabetic neuropathy, glycolytic disorders, disorders involved in cholesterol transport and related disorders and diseases by the use of in vitro and in vivo assays. Therapeutics of the present invention may be assayed for activity in treating or preventing diabetes by contacting: (/) cultured cells in vitro or (/ ' ) animal models with the Therapeutic, and comparing the level of disease indicators in the cells or symptoms in the test animals contacted with the Therapeutic, with said level of said indicator in cells or animals not so contacted; wherein a lower level in said contacted cells or said test animals indicates that the Therapeutic possesses activity in treating or preventing diabetes or its sequelae. Specific examples of cell culture models include, but are not limited to: ( ) diabetes - cultured rat endothelial cells from diabetes-affected and -nonaffected humans (see e.g., Bazan, et al, 1997. Therapie 52:447-451) and (ii) cholesterol transport - cultured Chinese hamster ovary cells (see e.g., Underwood, et al, 1998. J. Biol. Chem. 273:4266-4274). Specific examples of animal models include, but are not limited to: (/) diabetes - IL-2-expressing transgenic mice (see e.g., Elliot & Flavell, 1994. Int. Immunol. 6:1629-1637) and (ii) cholesterol transport - obese murine model of hypercholesterolemia (see e.g., Hassel, 1998. Curr. Opin. Lipidol 9:7-10). (12) Protein-Protein Interaction Assays The present invention discloses methodologies for assaying and screening derivatives, fragments, analogs and homologs of NIKl protein-interacting proteins (NIKl protein-IPs) for binding to NIKl protein. The derivatives, fragments, analogs and homologs of the NIKl protein- IPs which interact with NIKl protein may be identified by means of a yeast two hybrid assay system (see e.g., Fields & Song, 1989. Nature 340:245-246) or; preferably, a modification and improvement thereof, as described in U.S. Patent Applications Serial Nos. 08/663,824 (filed June 14, 1996) and 08/874,825 (filed June 13, 1997), both of which are entitled "Identification and Comparison of Protein-Protein Interactions that Occur in Populations and Identification of Inhibitors of These Interactions," to Nandabalan, et al, and which are incorporated by reference herein in their entireties. The identification of interacting proteins by the improved yeast two hybrid system is based upon the detection of the expression of a reporter gene (hereinafter "Reporter Gene"), the transcription of which is dependent upon the reconstitution of a transcriptional regulator by the interaction of two proteins, each fused to one half of the transcriptional regulator. The bait NIKl protein (or derivative, fragment, analog or homolog) and prey protein (proteins to be tested for ability to interact with the bait protein) are expressed as fusion proteins to a DNA-binding domain, and to a transcriptional regulatory domain, respectively, or vice versa. In a specific embodiment of the present invention, the prey population may be one or more nucleic acids encoding mutants of a NIKl protein-IP (e.g., as generated by site-directed mutagenesis or another method of producing mutations in a nucleotide sequence). Preferably, the prey populations are proteins encoded by DNA (e.g., cDNA, genomic DNA or synthetically generated DNA). For example, the populations may be expressed from chimeric genes comprising cDNA sequences derived from a non-characterized sample of a population of cDNA from mammalian RNA. In another specific embodiment, recombinant biological libraries expressing random peptides may be used as the source of prey nucleic acids. The present invention discloses methods for the screening for inhibitors of the interacting proteins (NIKl protein-IPs). In brief, the protein-protein interaction assay may be performed as previously described herein, with the exception that it is performed in the presence of one or more candidate molecules. A resulting increase or decrease in Reporter Gene activity, in relation to that which was present when the one or more candidate molecules are absent, indicates that the candidate molecule exerts an effect on the interacting pair. In a preferred embodiment, inhibition of the protein interaction is necessary for the yeast cells to survive, for example, where a non- attenuated protein interaction causes the activation of the URA3 gene, causing yeast to die in medium containing the chemical 5-fluoroorotic acid. See e.g., Rothstein, 1983. Meth. Enzymol. 101 :167-180. In general, the proteins comprising the bait and prey populations are provided as fusion (chimeric) proteins, preferably by recombinant expression of a chimeric coding sequence containing each protein contiguous to a pre-selected sequence. For one population, the preselected sequence is a DNA-binding domain which may be any DNA-binding domain, so long as it specifically recognizes a DNA sequence within a promoter (e.g., a transcriptional activator or inhibitor). For the other population, the pre-selected sequence is an activator or inhibitor domain of a transcriptional activator or inhibitor, respectively. The regulatory domain alone (not as a fusion to a protein sequence) and the DNA-binding domain alone (not as a fusion to a protein sequence) preferably, do not detectably interact, so as to avoid false-positives in the assay. The assay system further includes a reporter gene operably linked to a promoter which contains a binding site for the DNA-binding domain of the transcriptional activator (or inhibitor). Accordingly, in the practice of the present invention, the binding of the NIKl protein fusion protein to a prey fusion protein leads to reconstitution of a transcriptional activator (or inhibitor), which concomitantly activates (or inhibits) expression of the Reporter Gene. In a specific embodiment, the present invention discloses a methodology for detecting one or more protein-protein interactions comprising the following steps: (/) recombinantly- expressing the NIKl protein (or a derivative, fragment, analog or homolog thereof) in a first population of yeast cells of a first mating type and possessing a first fusion protein containing the NIKl protein sequence and a DNA-binding domain; wherein said first population of yeast cells contains a first nucleotide sequence operably-linked to a promoter which is "driven" by one or more DNA-binding sites recognized by said DNA-binding domain such that an interaction of said first fusion protein with a second fusion protein (comprising a transcriptional activation domain) results in increased transcription of said first nucleotide sequence; (ii) negatively selecting to eliminate those yeast cells in said first population in which said increased transcription of said first nucleotide sequence occurs in the absence of said second fusion protein; (Hi) recombinantly expressing in a second population of yeast cells of a second mating type different from said first mating type, a plurality of said second fusion proteins; wherein said second fusion protein is comprised of a sequence of a derivative, fragment, analog or homolog of a NIKl protein-IP and an activation domain of a transcriptional activator, in which the activation domain is the same in each said second fusion protein; (iv) mating said first population of yeast cells with said second population of yeast cells to form a third population of diploid yeast cells, wherein said third population of diploid yeast cells contains a second nucleotide sequence operably linked to a promoter "driven" by a DNA-binding site recognized by said DNA-binding domain such that an interaction of a first fusion protein with a second fusion protein results in increased transcription of said second nucleotide sequence, in which the first and second nucleotide sequences can be the same or different and (v) detecting said increased transcription of said first and/or second nucleotide sequence, thereby detecting an interaction between a first fusion protein and a second fusion protein. In a preferred embodiment, the bait (a NIKl protein sequence) and the prey (a library of chimeric genes) are combined by mating the two yeast strains on solid media for a period of approximately 6-8 hours. In a less preferred embodiment, the mating is performed in liquid media. The resulting diploids contain both types of chimeric genes (i.e., the DNA-binding domain fusion and the activation domain fusion). After an interactive population is obtained, the DNA sequences encoding the pairs of interactive proteins are isolated by a method wherein either the DNA-binding domain hybrids or the activation domain hybrids are amplified, in separate reactions. Preferably, the amplification is carried out by polymerase chain reaction (PCR; see e.g., Innis, et al, 1990. PCR Protocols (Academic Press, Inc., San Diego, CA)) utilizing pairs of oligonucleotide primers specific for either the DNA-binding domain hybrids or the activation domain hybrids. The PCR amplification reaction may also be performed on pooled cells expressing interacting protein pairs, preferably pooled arrays of interactants. Other amplification methods known within the art may also be used including, but not limited to, ligase chain reaction; Qβ-replicase or the like. See e.g., Kricka, et al, 1995. Molecular Probing, Blotting, and Sequencing (Academic Press, New York, NY). In an additional embodiment of the present invention, the plasmids encoding the DNA- binding domain hybrid and the activation domain hybrid proteins may also be isolated and cloned by any of the methods well-known within the art. For example, but not by way of limitation, if a shuttle (yeast to E coli) vector is used to express the fusion proteins, the genes may be subsequently recovered by transforming the yeast DNA into E. coli and recovering the plasmids from the bacteria. See e.g., Hoffman ,et al, 1987. Gene 57:267-272. (13) Pharmaceutical Compositions The invention present discloses methods of treatment and prophylaxis by the administration to a subject of an pharmaceutically-effective amount of a Therapeutic of the invention. In a preferred embodiment, the Therapeutic is substantially purified and the subject is a mammal, and most preferably, human. The pharmaceutical compositions may in addition be used in the manufacture of a medicament for treating medical conditions. Formulations and methods of administration that can be employed when the Therapeutic comprises a nucleic acid are described in Sections 6(ϊ) and 6(H), supra. Various delivery systems are known and can be used to administer a Therapeutic of the present invention including, but not limited to: (/ ' ) encapsulation in liposomes, microparticles, microcapsules; (//) recombinant cells capable of expressing the Therapeutic; ( /) receptor-mediated endocytosis (see, e.g., Wu & Wu, 1987. J. Biol. Chem. 262:4429-4432); (iv) construction of a Therapeutic nucleic acid as part of a retroviral or other vector, and the like. Methods of administration include, but are not limited to, intradermal, intramuscular, intraperitoneal, intravenous, subcutaneous, intranasal, epidural, and oral routes. The Therapeutics of the present invention may be administered by any convenient route, for example by infusion or bolus injection, by absorption through epithelial or mucocutaneous linings (e.g., oral mucosa, rectal and intestinal mucosa, etc.) and may be administered together with other biologically-active agents. Administration can be systemic or local. In addition, it may be advantageous to administer the Therapeutic into the central nervous system by any suitable route, including intraventricular and intrathecal injection. Intraventricular injection may be facilitated by an intraventricular catheter attached to a reservoir (e.g., an Ommaya reservoir). Pulmonary administration may also be employed by use of an inhaler or nebulizer, and formulation with an aerosolizing agent. It may also be desirable to administer the Therapeutic locally to the area in need of treatment; this may be achieved by, for example, and not by way of limitation, local infusion during surgery, topical application, by injection, by means of a catheter, by means of a suppository, or by means of an implant. In a specific embodiment, administration may be by direct injection at the site (or former site) of a malignant tumor or neoplastic or pre-neoplastic tissue. In another embodiment of the present invention, the Therapeutic may be delivered in a vesicle, in particular a liposome. See e.g., Langer, 1990. Science 249:1527-1533. In yet another embodiment, the Therapeutic can be delivered in a controlled release system including ,but not limited to: a delivery pump (see e.g., Saudek, et al, 1989. New Engl J. Med. 321 :574 and a semi-permeable polymeric material (see e.g., Howard, et al, 1989. J. Neurosurg. 71 :105). Additionally, the controlled release system can be placed in proximity of the therapeutic target (e.g., the brain), thus requiring only a fraction of the systemic dose. See, e.g., Goodson, In: Medical Applications of Controlled Release 1984. (CRC Press, Bocca Raton, FL). In a specific embodiment of the present invention, where the Therapeutic is a nucleic acid encoding a protein, the Therapeutic nucleic acid may be administered in vivo to promote expression of its encoded protein, by constructing it as part of an appropriate nucleic acid expression vector and administering it so that it becomes intracellular (e.g., by use of a retroviral vector, by direct injection, by use of microparticle bombardment, by coating with lipids or cell- surface receptors or transfecting agents, or by administering it in linkage to a homeobox-like peptide which is known to enter the nucleus (see e.g., Joliot, et al, 1991. Proc. Natl. Acad. Sci. USA 88: 1864-1868), and the like. Alternatively, a nucleic acid Therapeutic can be introduced intracellularly and incorporated within host cell DΝA for expression, by homologous recombination. The present invention also provides pharmaceutical compositions. Such compositions comprise a therapeutically-effective amount of a Therapeutic, and a pharmaceutically acceptable carrier. As utilized herein, the term "pharmaceutically acceptable" means approved by a regulatory agency of the Federal or a state government or listed in the U.S. Pharmacopoeia or other generally recognized pharmacopoeia for use in animals and, more particularly, in humans. The term "carrier" refers to a diluent, adjuvant, excipient, or vehicle with which the therapeutic is administered and includes, but is not limited to such sterile liquids as water and oils. The amount of the Therapeutic of the invention which will be effective in the treatment of a particular disorder or condition will depend on the nature of the disorder or condition, and may be determined by standard clinical techniques by those of average skill within the art. In addition, in vitro assays may optionally be employed to help identify optimal dosage ranges. The precise dose to be employed in the formulation will also depend on the route of administration, and the overall seriousness of the disease or disorder, and should be decided according to the judgment of the practitioner and each patient's circumstances. However, suitable dosage ranges for intravenous administration of the Therapeutics of the present invention are generally about 20-500 micrograms (μg) of active compound per kilogram (Kg) body weight. Suitable dosage ranges for intranasal administration are generally about 0.01 pg/kg body weight to 1 mg/kg body weight. Effective doses may be extrapolated from dose-response curves derived from in vitro or animal model test systems. Suppositories generally contain active ingredient in the range of 0.5% to 10% by weight; oral formulations preferably contain 10% to 95% active ingredient. The present invention also provides a pharmaceutical pack or kit, comprising one or more containers filled with one or more of the ingredients of the pharmaceutical compositions and Therapeutics of the present invention. Optionally associated with such container(s) may be a notice in the form prescribed by a governmental agency regulating the manufacture, use or sale of pharmaceuticals or biological products, which notice reflects approval by the agency of manufacture, use or sale for human administration. (14) Specific Examples (0 Identification of NIKl Protein*NlKl Protein-IP Complexes A modified, improved yeast two hybrid system was used to identify protein interactions of the present invention. Yeast is a eukaryot, and therefore any intermolecular protein interactions detected in this type of system demonstrate protein interactions that occur under physiological conditions. See e.g., Chien, et al, 1991. Proc. Natl. Acad. Sci. USA 88:9578-9581. Expression vectors were constructed to encode two hybrid proteins. In a "reverse" screen methodology of the present invention, a portion of the NIKl protein was fused to the Gal4 activator domain, and the prey protein sequences of the mammalian cDNA library were fused to the DNA-binding domain. Each of the resulting vectors was then inserted into complementary mating types of yeast (an a mating type and an α mating type) by use of techniques well-known within the art. See e.g., Chien, et al, 1991., supra. Mating was carried out to express both vector constructs within the same yeast cells, thus allowing protein-protein interaction to occur. Interaction between the bait and prey domains led to transcriptional activation of Reporter Genes containing c s-binding elements for Gal4. The Reporter Genes encoding the indicator protein β-galactosidase, and metabolic markers for uracil and histidine auxotrophy, were included in a specific fashion, in one or the other of the yeast strains utilized in the mating. In this manner, yeast were selected for successful mating, expression of both fusion constructs and expression of NIKl protein-IPs. Yeast clones which were found to contain interacting regions were selected and grown in individual wells of 96-well microtiter plates. The plasmids containing the NIKl protein-IP sequences were then isolated and characterized. The prey cDNAs were obtained from a fetal brain cDNA library of 1.5 x 10 6 independent isolates. The library was synthesized from Xho 7 -digested and Tl 5-primed fetal brain mRNA (derived from five male/female, 19-22 week fetuses) which was directionally cloned into pBD- GAL4 (Stratagene; La Jolla, CA), a yeast Gal4 activation domain cloning vector including the TRP I gene for selection of yeast deficient in tryptophan biosynthesis. Two reverse screens were performed in order to test the interaction of prey cDNA products against an array of 20 and 22 bait proteins, respectively. The bait was encoded by the NIKl protein nucleotide sequence comprised of nucleotides 1089-1472 encoding the carboxyl- terminal region of the NIKl protein, as depicted in Figure 1 [SEQ ID NO:l] and [SEQ ID NO:2], respectively. The NIKl protein was obtained by use of a yeast two-hybrid screen in which it served as an Retinoblastoma (Rb)-interactant. The nucleic acid encoding the introduced bait was then expressed by lithium acetate- polyethylene glycol-mediated transformation (see e.g., Ito, et al, 1983. J. Bacteriol 153:163- 168) into the yeast strain N106r (mating type a, ura3, his3, ade2, trpl, leu2, gal4, gal80, cyh Lys2: :GAL1 UAS -HIS3 TATA -HIS3, ura3: :GAL1 UAS -GAL TATA -lacZ); whereas the prey sequences were introduced by transformation into the yeast strain YULH (mating type a, ura3, his3, lys2, Ade2, trpl, leu2, gal4, gal80, GAL1-URA3, GALl-lacZ), The two transformed yeast populations were then mated using standard methods in the art. See e.g., Sherman, et al, 1991. Getting Started with Yeast (Academic Press; New York, NY). In brief, the yeast were grown until mid- to late- log phase on media which selected for the presence of the appropriate plasmids. The two mating strains (α and a) were then diluted in YAPD media, filtered onto nitrocellulose membranes and incubated at 30°C for 6-8 hours. The yeast cells were then transferred to media selective for the desired diploids (i.e., yeast harboring Reporter Genes for β-galactosidase, uracil auxotrophy, and histidine auxotrophy and expression of the vectors encoding the bait and prey). The mating products were then plated onto synthetic complete (SC ) media (see e.g., Kaiser, et al, 1994. Methods in Yeast Genetics (Cold Spring Harbor Laboratory Press; Cold Spring Harbor, NY)) lacking adenine and lysine (to facilitate the selection of successful matings), leucine and tryptophan (to facilitate the selection for expression of genes encoded by both the bait and prey plasmids) and uracil and histidine (to facilitate the selection for protein interactions). This medium containing the aforementioned compounds is referred to as SC Selective medium (hereinafter "SCS medium"). Selected clones were examined for expression of β-galactosidase to confirm the formation of a NIKl protein*NlKl protein-IP interaction. Filter-lift β-galactosidase assays were then performed as per a modified of the protocol of Breeden & Nasmyth (1985. Cold Spring Harbor Quant. Biol. 50: 643-650). Colonies were patched onto SCS plates, grown overnight and replica-plated onto Whatman No. 1 filters. The replica filters were subsequently assayed for β-galactosidase activity (i.e., colonies which were positive turned a visible blue). The cells contained within colonies which were positive for protein interaction contained a mixture of DNA-binding and activation-domain plasmids and these cells were individually plated and regrown as single isolates in the individual wells of 96-well microtiter plates. Ten microliters (μl) of each isolate was lysed, the inserts contained within the pACT2 and pBD- GAL4 plasmids were amplified by PCR using primers specific for the flanking sequences of each vector and approximately 200 amino-terminal nucleotides of each insert sequence was determined using an ABI Model 377 sequenator. Comparison to known sequences was made using the "BLAST" computer program publicly available through the National Center for Biotechnology Information. During a subsequent screening procedure utilizing a fragment of the NIKl protein consisting of nucleotides 1089-1472, five unique isolates were identified, which were determined to be identical to known Trk oncogene (TrkA) nucleic acid sequence (GenBank Ace. No. X03541) starting at nucleotides 176, 182, 200, 224 and 230 (as depicted in Figure 2 [SEQ ID NO:3] and Table 1). Other identified sequences included: (/ ' ) eight isolates identical to the protein phosphatase Iα sequence (GenBank Ace. No. M63960), starting at nucleotides 30, 33, 36, 48, 93, 96, and 150 (as depicted in Figure 3 [SEQ ID NO:5]; (ii) seven isolates identical to the 14-3-3ε sequence (GenBank Ace. No. U28936), starting at nucleotides 214 (2 isolates), 223 (4 isolates) and 427 (as depicted in Figure 4 [SEQ ID NO:7]; ( ) two isolates identical to the α-tropomyosin sequence (GenBank Ace. No. M19713), starting from nucleotide 535 (as depicted in Figure 5 [SEQ ID NO:9]; (iv) one isolate identical to the vimentin sequence (GenBank Ace. No. X56134), starting at nucleotide 581 (as depicted in Figure 6 [SEQ ID NO:l 1]; (v) four isolates identical to the p0071 sequence (GenBank Ace. No. X81889), starting at nucleotide 708 (3 isolates) and 711 (as depicted in Figure 7 [SEQ ID NO: 13]; (vi) one isolate identical to the Ini- 1 sequence (GenBank Ace. No. U04847), starting at nucleotide 289 (as depicted in Figure 8 [SEQ ID NO:15]; (vii) one isolate identical to the ESTS cg30153.1.g5 sequence (referred to herein as IP-1), starting at nucleotide 1 (as depicted in Figure 9 [SEQ ID NO: 17]; (viii) one isolate referred to herein as IP-2, starting at nucleotide 337 (as depicted in Figure 10 [SEQ ID NO: 19]; (ix) one isolate identical to the sequence referred to herein as IP-3, starting at nucleotide 514 (as depicted in Figure 11 [SEQ ID NO:21]; (x) 24 isolates identical to the cg50648.e3 sequence (referred to herein as IP-4), starting at nucleotide 1 (15 isolates), 4 (3 isolates), 40 (3 isolates), 43, 52, and 64 (as depicted in Figure 12 [SEQ ID NO:23] and (xi) one isolate identical to the cg50424.b2 sequence (referred to herein as IP-5), at nucleotide 1 (as depicted in Figure 13 [SEQ ID NO:25]. As previously discussed herein, the nucleotide sequences for IP-1, IP-2, IP-3, IP-4, or IP-5 have never been disclosed within the prior art and are considered to be sequences of novel genes. The determined nucleic acid sequences for IP-1, IP-2, IP-3, IP-4, or IP-5 and their corresponding inferred amino acid sequences are shown in Figures 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, and 13, respectively. A summary of the NIKl protein-interactants identified herein is shown in Table 1. (ii) Verification of the Specificity of the NIKl Protein-Interactions To determine the overall degree of specificity for the bai prey interaction, two general assays were performed. In the first assay, N106r yeast cells were produced which expressed the individual plasmids encoding the NIKl proteins. These yeast cells were plated on SCS plates, grown overnight, and examined for growth. No growth was found for all five proteins, thus confirming that they were not "self-activating" proteins (i.e., these proteins require interaction with a second protein domain for a functional activation complex). In the second assay, plasmids containing TrkA, protein phosphatase lα, 14-3-3ε, α-tropomyosin, vimentin, p0071, Ini-1, IP-1, IP-2, IP-3, IP-4, or IP-5 inserts were transformed into strain YULH yeast (mating type a) and mated with yeast strain N106r (mating type α) expressing proteins other than the NIKl protein. Promiscuous binders (i.e., inserts able to bind with many other proteins in a non-specific manner) would interact in a non-specific manner with non-NlKl protein domains, and would subsequently be discarded as non-specific interactants. None of the interactants of the present invention showed binding to protein other than those described in the following paragraph. In order to recapitulate the aforementioned detected interactions, and further demonstrate their specificity, the isolated bait plasmid for the NIKl protein was used to transform yeast N106r (mating type α). The interacting domains from TrkA, protein phosphatase lα, 14-3-3ε, α-tropomyosin, vimentin, p0071, Ini-1, IP-1, IP-2, IP-3, IP-4, or IP-5 were transformed into strain YULH (mating type a). The transformants were re-amplified and a mating was performed to recapitulate the identified NIKl protein*NlKl protein-IP interactions. As shown in Figure 14, the NIKl protein was shown to complex in a specific manner with the aforementioned NIKl protein-IPs. In addition, the NIKl protein was also shown not to react non-specifically with the CDK2 protein and the vector controls. As illustrated in Figure 14, the intersection of the NIKl protein row (top) with the TrkA, protein phosphatase lα, 14-3-3ε, α-tropomyosin, vimentin, p0071, Ini-1, IP-1, IP-2, IP-3, IP-4, or IP-5 columns, indicates growth (i.e. a positive protein- protein interaction), but the intersection of the NIKl protein row with the columns for CDK2 and vector control, indicates no growth (i.e., no protein-protein interaction). The control using p27(Kipl) also showed no reaction with any of the NIKl protein interacting proteins (intersection of the column p27(Kipl) and TrkA, protein phosphatase lα, 14-3-3ε, α-tropomyosin, vimentin, p0071, Ini-1, IP-1, IP-2, IP-3, IP-4, or IP-5, or vector). In contrast, the intersection of the p27(Kipl) indicates growth (i.e. a positive protein-protein interaction) with CDK2. (Hi) Analysis of the Sequences Encoding IP-1, IP-2. IP-3. IP-4. or IP-5 The general procedure for the assembly and identity searches of the sequences encoding human EST were performed using publicly-available EST assembly databases such as the National Center for Biotechnology Information (N. C.B.I.) BlastN 2.0 program. See Altschul, et al, 1990. J. Mol. Biol. 215:403-410. Sequences which were demonstrated to align with 95% or greater identity at the nucleic acid level over their terminal sequences comprised of, at least, 30 nucleotides, were utilized if the alignment resulted in 5 '-extension or 3 '-extension of the EST sequence of interest. Once this first assembly procedure was complete, the extended sequence was again subjected to comparison with the BlastN 2.0 program in order to detect potential new homologies to the added extensions. The sequence was extended in both directions until new, related sequences which allowed extension of the assembled sequence were no longer detected. The assembled EST sequence was then subjected to further homology searches using the BlastN 2.0 program for the identification of protein coding regions by database similarity search. See e.g., Gish & States, 1993. Nat. Genet. 3:266-272. The BlastN 2.0 program translates the DNA sequence in all six reading frames and compares the translated protein sequence with those within protein databases. The statistical significance is estimated under the assumption that the equivalent of one entire reading frame in the query sequence codes for protein and that significant alignments will involve only coding reading frames. Only those sequences which produce high-scoring segment pairs are shown in the BlastN 2.0 program results. Additionally, the sequences were analyzed for open reading frames (ORFs) using proprietary software which translates the DNA sequence in all six reading frames of the (assembled) DNA sequence using the standard genetic code. The interacting ESTs were obtained from directionally-cloned libraries, and thus the direction of translation of the assembled EST is known to be in the 5' to 3' orientation. Within the translations obtained, all ORFs found in frames 1 -3 were analyzed. ORFs which were found to be comprised of: ( ) amino acid sequences greater than 50 amino acids which followed an initiator codon or (ii) an ORF with no initiator methionine at the 5 '-terminus were determined to be possible protein products, and were compared to sequences in protein data bases using the BlastN 2.0 program. Further protein sequence analysis was performed after selecting a suitable ORF. The protein sequence was then compared to previously characterized protein domains present in the PROSITE, BLOCKS and PRODOM motif databases. See e.g., Nakai & Kanehisa, 1992. Genomics 14:897-891 ; Wallace & Henikoff, 1992. Cabios 8:249-254. The BLIMPS program found matches to entries in the BLOCKS; wherein the BLOCKS analysis aligns similar sequence domains found in proteins and reveals the corresponding protein families. The BlastN 2.0 program found matches to entries in the PRODOM database; wherein the PRODOM analysis displays the alignment that constitutes protein domains with high identities and similarities. The Prosite-Scan program found matches to entries in the PROSITE database; wherein the PROSITE analysis reveals shorter functional domains, such as myristylation or phosphorylation sites or targeting signals. (a) IP-1 (EST cg30153.g5) One identified prey sequence of the present invention which was found to interact with the NIKl protein was identical to EST cg30153.g5, a human cDNA clone of 552 nucleotides. No other expressed sequences which were identical or highly homologous to the cg30153.g5 sequence were found. EST cg30153.g5 could not be extended to in either the 5' or 3' direction. A search was performed with the IP-1 nucleotide sequence and revealed significant homologies to proteins which are associated with the cytoskeleton. An identity of 61% (nucleotides 68 to 453) was seen with human plectin gene (GenBank Ace. Nos. Z54367 [gene], U63610 [gene, exon 3-320] and U53204 [mRNA]). In addition, an identity of 64% of nucleotides 66-344 was found to rat α-internexin (GenBank Ace. No. X52017). An open reading frame (ORF) from nucleotides 1-363 could be translated and the resulting protein was designated IP-1. This aforementioned translational frame had no initiator methionine codon (ATG) and no stop codon, thus it may represent the core region of a protein. A BlastN 2.0 search with the IP-1 sequence showed: ( ) 42% identities and 50% similarities of amino acid residues 20-74 to human high-sulfur keratins (GenBank Ace. No. X63755); (ii) 51% similarity of amino acids 51-97 to KAP5.4 keratin protein (GenBank Ace. No. X73434) and (///) 25 amino acids (amino acid residue 68-92) showed 64% homology to metallothionein (GenBank Ace. No. U67347). A search using the PRODOM program also revealed homology to high-sulfur keratin (38% homology of amino acid residues 51-94 and 45% homologies to amino acid residues 66-105). The IP-1 nucleotide and amino acid sequences are illustrated in Figure 9 [SEQ ID NOS: 17 and 18, respectively]. The homology of IP-1 to intermediate-filament-associated proteins such as plectin, internexin and keratin are quite promising, due to the fact that vimentin (an intermediate filament protein) and p0071 (a protein of the adherens junctions) were found to be another interactant of the NIKl protein. In addition, PROSITE analysis showed three phosphorylation sites and an N- myristolation site within the ORF of IP- 1. Accordingly, the NIKl protein interactant, IP-1, represents a core region of a novel protein with homologies to intermediate-filament associated proteins. (b) IP-2 TEST AA143467) Another of the identified prey sequences of the present invention which were found to interact with the NIKl protein could be extended to 1601 nucleotides using a minimum of four human ESTs: AI929382 (nucleotides 1 to 533), AA143467 (nucleotides 310-907), H83769 (nucleotides 644-1062), and W19892 (nucleotides 998-1601). The IP-2 nucleotide and amino acid sequences are illustrated in Figure 10 [SEQ ID NOS: 19 and 21, respectively]. No significant homology to known proteins was detected using the IP-2 sequence by the BlastN 2.0 program. An open reading frame (ORF) was found to be capable of translation from nucleotides 122-1054 (a 311 amino acid residue ORF) and the resulting protein was designated IP-2. The IP-2 ORF has no initiator methionine codon (ATG) until nucleotide 428, thus it may represent the carboxyl-terminus of a protein following further 5' extension of the EST sequence. IP-2 showed a 28% identity and a 46% similarity to the amino-terminal region of a contractile system protein. A domain search utilizing the PRODOM database showed a 32% identities and a 41% similarity of amino acid residues 17-89 to the amino-terminal region of the α-tropomyosin chain from skeletal muscle. This result is promising due to the fact that α-tropomyosin was found to be an interactant with the NIKl protein. Thus, the NIKl protein-interactant, IP-2, may represent a novel tropomyosin-homolog protein. (c) IP-3 An additional identified prey sequence of the present invention which was demonstrated to interact with the NIKl protein was found to be identical to EST H67985, a 371 nucleotide sequence derived from a human fetal liver/spleen library, which may function as a ubiquitin carboxyl-terminal hydrolase (see e.g., Hillier, et al, 1995. Wash Univ.-Merck EST Project). The 5'-terminus of this EST was able to be extended with EST AA255861 (NCI Cancer Genome Anatomy Project, 1997 Tumor Gene Index) and the 3 '-terminus could be extended with EST AA251528 (NCI Cancer Genome Anatomy Project, 1997 Tumor Gene Index), resulting in an assembled EST 941 nucleotides in length. The complete assembled EST sequence of 941 nucleotides is shown in Figure 11, with the nucleic acid sequence of EST H67985 shown in bold lettering (nucleotides 269-701), the nucleic acid sequence of EST AA255861 (nucleotides 1-429 of the assembled EST) shown in italics and the nucleic acid sequence of EST AA251528 denoted by underline starting at nucleotide 524 of the assembled expressed sequence. Recently, it has been found that the sequence disclosed herein is identical to sequence for Homo sapiens mRNA for KIAA1097 protein, partial cds - 4271 bp (GenBank Accession Number AB029020). That sequence was added to GenBank Aug 4, 1999, and thus, nothing has been reported about its functional role. The nucleotide sequence of the assembled EST showed high homology to ubiquitin carboxyl-terminal hydrolase-homolog ESTs. Specifically, EST AA236822 showed a 94% identity to nucleotides 9-98; EST AA081709 showed a 98% identity to nucleotides 336-674; EST AA 592337 showed an 87% identity to nucleotides 1-183; EST AA 410216 showed a 94% identity to nucleotides 1-74 and EST R52765 showed a 99% identity to nucleotides 597-941. Nonetheless, no sequence could be utilized for further extension of the assembled EST. The IP-3 nucleotide and amino acid sequences are illustrated in Figure 11 [SEQ ID NO:21 and 22, respectively]. The translated protein was found to encompass an open reading frame (ORF) from nucleotides 67-939 (291 amino acid ORF) and was designated IP-3. This translational frame had an initiator methionine codon (ATG) but no stop codon, thus it may represent the amino-terminal region of a protein. A domain search utilizing the PRODOM program was performed and showed identities to ubiquitin carboxyl-terminal hydrolases 1, 2, 3 and 4. These identities were all revealed within the region between amino acid residues 17 and 172, and showed a 38% identity and 55% similarity. In addition, the PRODOM search was found to be in good agreement with the PROSITE analysis, which showed, in addition to several phosphorylation and a N-myristylation site, a ubiquitin carboxyl-terminal hydrolases family 2 signature. Therefore, the NIKl protein-interactant, IP-3, represents a novel ubiquitin processing enzyme homolog. (d) IP-4 (EST eg 50648e3 Another identified prey sequence of the present invention which was found to interact with the NIKl protein was EST cg50648e3, a human cDNA clone of 439 nucleotides. EST cg50648e3 was shown to exhibit a high degree of identity to EST M62042 (GenBank Ace. No. M62042; see e.g., Adams, et al, 1991. Science 252:1651-1656) and thus, the expressed sequence was assembled as follows. Nucleotides 1-70 of cg50648e3 were extended at the 3'-terminus with nucleotides 1-472 of EST M62042, resulting in an expressed sequence 542 nucleotides in length. Further homology searches resulted in.no significant identity to other published EST sequences, and therefore, the extended expressed sequence could not be further extended. The IP-4 nucleotide and amino acid sequences are illustrated in Figure 12 [SEQ ID NO:23 and 24, respectively]. The extended sequence of 542 nucleotides showed a 65% identity (nucleotides 55-297) to the Caenorhabditis elegans collagen encoding gene Col-2 (GenBank Ace. No. V00148). A 62% identity of nucleotides 154-435 were found to the human zinc finger transcriptional regulator (GenBank Ace. No. M92844). The open reading frame (ORF) from nucleotides 2-316 (105 amino acid ORF) was shown not to possess a methionine start codon, thus it may represent the carboxyl-terminal region of the protein designated IP-4 herein. The ORF in reading frame +2 extends the protein sequence in the database for the Homo sapiens EST00098 gene, last exon - 766 bp (GenBank Accession Number Y17450). Amino acid sequence for the EST00098 exon is only 57 amino acids long whereas the sequence disclosed herein has 105 amino acids. The 100% overlap between protein EST00098 and IP-4 is found in the carboxy-terminal region of IP-4; amino acid acids 1-48 are an extension to EST00098. No significant homology to any other proteins were found. There are ORFs in reading frame +1 and +3 also but has no homologies to known proteins could be found. Thus, the NIKl protein-interactant, IP-4, represents a novel protein. (e) IP-5 (EST cg50424 hi) Yet another identified prey sequence which was demonstrated to interact with the NIKl protein was shown to be identical to EST cg50424.b2, a human cDNA clone of 441 nucleotides. Further homology searches resulted in no significant identities to other published EST sequences and EST cg50424.b2 could not be extended in either the 5' or 3' direction. The IP-5 nucleotide and amino acid sequences are illustrated in Figure 13 [SEQ ID NO:25 and 26, respectively]. An open reading frame (ORF) from nucleotides 1-246 (82 amino acid ORF) was found to be translated and was designated IP-5. At the nucleotide level 98% identities over 236 nucleotides (out of 441bp in IP-5, diverges at both ends) were found to human ganglioside-induced differentiation associated protein 1 (Genbank Accession Number y 178490) - 1084bp, 358aa. At the amino acid level, 96% identity over 78 amino acids (out of 82aa in IP-5, diverges at both ends). IP-5 could represent a splice- variant of human ganglioside-induced differentiation associated protein 1. Currently, no information is publically available for human ganglioside-induced differentiation associated protein 1 (Genbank Accession Number yl 78490), except the nucleotide and amino acid sequences, identified in brain. In accord, the NIKl protein interactant, IP-5, represents a homolog or splice varient to human ganglioside-induced differentiation associated protein 1. The present invention is not to be limited in scope by the specific embodiments described herein. Indeed, various modifications of the invention, in addition to those described herein, will become apparent to those skilled within the art from the foregoing description and accompanying figures. Such modifications are intended to fall within the scope of the appended claims. Various publications are cited herein, and the disclosures of which are incorporated by reference in their entireties. TABLE 1 . NEK2 (UI 1050) INTERACTANTS TRADOCS: 1249011.1 (qrqrOϋ.doc)

Claims: WHAT IS CLAIMED IS: (1) A purified complex of a NIKl protein and a NIKl protein-IP protein, wherein said NIKl protein-IP protein is selected from the group consisting of: TrkA, protein phosphatase lα, 14-3-3ε, α-tropomyosin, vimentin, p0071, Ini-1, IP-1, IP-2, IP-3, IP-4, or IP-5. (2) The purified complex of claim 1 , wherein said proteins are human proteins. (3) A purified complex selected from the group consisting of a complex of a derivative of a NIKl protein and a NIKl protein-IP protein, a complex of a NIKl protein and a derivative of a NIKl protein-IP, and a complex of a derivative of a NIKl protein and a derivative of a NIKl protein-IP, in which the derivative of the NIKl protein is capable of forming a complex with a wild-type NIKl protein-IP protein and the derivative of the NIKl protein-IP is capable of forming a complex with a wild-type NIKl protein, wherein the NIKl protein-IP protein is selected from the group consisting of: TrkA, protein phosphatase lα, 14-3-3ε, α-tropomyosin, vimentin, p0071, Ini-1, IP-1, IP-2, IP-3, IP-4, or IP-5. (4) The purified complex of claim 3, wherein the derivative of the NIKl protein and/or the NIKl protein-IP protein is detectably-labeled with a label selected from a group consisting of: radioactive, fluorescent, chemiluminescent, colorimetric, or enzymatic moieties. (5) A chimeric protein comprising a fragment of a NIKl protein consisting of at least 6 amino acid residues joined via a covalent bond to a fragment of a NIKl protein-IP protein also consisting of at least 6 amino acid residues. (6) The chimeric protein of claim 5, wherein the fragment of the NIKl protein is a fragment capable of binding a NIKl protein-IP protein and in which the fragment of the NIKl protein-IP protein is a fragment capable of binding the NIKl protein. (7) The chimeric protein of claim 6, wherein the fragment of the NIKl protein and the fragment of the NIKl protein-IP protein interact to form a NIKl protein»NlKl protein-IP complex. (8) An antibody which immunospecifically-binds the complex of claim 1 or a fragment or derivative of said antibody containing the binding domain thereof. (9) The antibody of claim 8, which does not immunospecifically-bind a NIKl protein or a NIKl protein-IP protein which are not part of a NIKl protein»NlKl protein-IP complex. (10) An isolated nucleic acid or an isolated plurality of nucleic acids comprising a nucleotide sequence encoding a NIKl protein and a nucleotide sequence encoding a NIKl protein-IP protein selected from the group consisting of: TrkA, protein phosphatase lα, 14-3-3ε, α-tropomyosin, vimentin, p0071, Ini-1, IP-1, IP-2, IP-3, IP-4, or IP-5. (11) The isolated nucleic acid or isolated plurality of nucleic acids of claim 10 which are comprised of nucleic acid vectors. (12) The isolated nucleic acid or isolated plurality of nucleic acids of claim 11, wherein the NIKl protein coding sequence and the NIKl protein-IP protein coding sequence are operably- linked to a promoter. (13) An isolated nucleic acid which comprises a nucleotide sequence encoding the chimeric protein of claim 7. (14) A cell containing a nucleic acid of claim 10, wherein the nucleic acid is a recombinant molecule. (15) A cell containing a nucleic acid of claim 12, wherein the nucleic acid is a recombinant molecule. (16) A recombinant cell containing a nucleic acid of claim 13, wherein the nucleic acid is a recombinant molecule. (17) A purified protein selected from the group consisting of IP-1, IP-2, IP-3, IP-4, or IP-5 proteins. (18) The protein of claim 17, wherein said protein is a human protein. (19) The protein of claim 18, which comprises an amino acid sequence selected from the group consisting of: SEQ ID NO.: 18; SEQ ID NO.:22; SEQ ID NO.:24 and SEQ ID NO.:26. (20) A purified protein encoded by a nucleic acid which is hybridizable to the inverse complement of a DNA possessing a nucleotide sequence consisting of a portion of the nucleotide sequence selected from the group consisting of: SEQ ID NO.: 17; SEQ ID NO.: 19; SEQ ID NO.:21; SEQ ID NO.:23, or SEQ ID NO.:25. (21) A purified derivative or analog of the protein of claim 17, wherein said derivative or analog is capable of binding a NIKl protein. (22) The derivative or analog of claim 21, which is capable of being bound by an antibody specific for a protein selected from the group consisting of: IP-1, IP-2, IP-3, IP-4, or IP-5 proteins. (23) A purified fragment of the protein of claim 17, wherein said fragment are comprised of, at least, a 6 amino acid residue portion of said protein. (24) A purified protein comprising an amino acid sequence which possesses at least a 60% identity to the protein of claim 17, wherein the percentage of identity is determined over an amino acid sequence of identical size to said protein of claim 17. (25) A chimeric protein comprising a fragment of the protein of claim 17, wherein said fragment consists of at least 6 amino acid residues of IP-1, IP-2, IP-3, IP-4, or IP-5, which is joined via a covalent bond to an amino acid sequence of a second protein, wherein the second protein is not said protein of claim 17. (26) An antibody which is capable of immunospecifically-binding the protein of claim 17, or a fragment or derivative of said antibody containing the binding domain thereof. (27) An isolated nucleic acid comprising a nucleotide sequence encoding the protein of claim 18. (28) An isolated nucleic acid comprising the nucleotide sequence of: SEQ ID NO.: 17; SEQ ID NO.: 19; SEQ ID NO.:21; SEQ ID NO.:23, or SEQ ID NO.:25. (29) An isolated nucleic acid which is hybridizable to the inverse complement of a nucleic acid possessing a nucleotide sequence consisting of a portion of the nucleotide sequence of: SEQ ID NO.:17; SEQ ID NO.:19; SEQ ID NO.:21 ; SEQ ID NO.:23, or SEQ ID NO.:25. (30) An isolated nucleic acid comprising a portion of the nucleotide sequence of SEQ ID NO.: 17; SEQ ID NO.: 19; SEQ ID NO.:21; SEQ ID NO.:23, or SEQ ID NO.:25, wherein said nucleic acid sequence is comprised of at least 10 nucleotides. (31) A cell containing the nucleic acid of claim 27, wherein said nucleic acid is a recombinant molecule. (32) A pharmaceutical composition comprising a therapeutically- or prophylactically-effective amount of the complex of claim 1 and a pharmaceutically-acceptable carrier. (33) The pharmaceutical composition of claim 31, wherein said proteins are human proteins. (34) A pharmaceutical composition comprising a therapeutically- or prophylactically-effective amount of the complex of claim 3 and a pharmaceutically-acceptable carrier. (35) A pharmaceutical composition comprising a therapeutically- or prophylactically-effective amount of the chimeric protein of claim 5 and a pharmaceutically-acceptable carrier. (36) A pharmaceutical composition of comprising a therapeutically- or prophylactically- effective amount of the chimeric protein of claim 6 and a pharmaceutically-acceptable carrier. (37) A pharmaceutical composition comprising a therapeutically- or prophylactically-effective amount of the antibody of claim 8, or a fragment or derivative of said antibody containing the binding domain thereof, and a pharmaceutically-acceptable carrier. (38) A pharmaceutical composition comprising a therapeutically- or prophylactically-effective amount of the antibody of claim 9, or a fragment or derivative of said antibody containing the binding domain thereof, and a pharmaceutically-acceptable carrier. (39) A pharmaceutical composition comprising a therapeutically- or prophylactically-effective amount of the nucleic acids or plurality of the nucleic acids of claim 10 and a pharmaceutically- acceptable carrier. (40) A pharmaceutical composition comprising a therapeutically- or prophylactically-effective amount of isolated nucleic acid of claim 13 and a pharmaceutically-acceptable carrier. (41) A pharmaceutical composition comprising a therapeutically- or prophylactically-effective amount of the recombinant cell of claim 14 and a pharmaceutically-acceptable carrier. (42) A pharmaceutical composition comprising a therapeutically- or prophylactically-effective amount of the protein of claim 15 and a pharmaceutically-acceptable carrier. (43) The pharmaceutical composition of claim 41 , wherein the proteins comprise the amino acid sequence as set forth in SEQ ID NO.: 18; SEQ ID NO.:20; SEQ ID NO.:22; SEQ ID NO.:24 and SEQ ID NO.:26. (44) A pharmaceutical composition comprising a therapeutically- or prophylactically-effective amount of the antibody of claim 26, or a fragment or derivative of said antibody containing the binding domain thereof, and a pharmaceutically-acceptable carrier. (45) A pharmaceutical composition comprising a therapeutically- or prophylactically-effective amount of a nucleic acid comprising a nucleotide sequence encoding the protein of claim 17; and a pharmaceutically-acceptable carrier. (46) A pharmaceutical composition comprising a therapeutically- or prophylactically-effective amount of a cell containing the recombinant nucleic acid of claim 27 and a pharmaceutically acceptable carrier. (47) A methodology for the production of a complex of a NIKl protein and a NIKl protein-IP protein which is comprised of: (/) growing a recombinant cell containing the nucleic acid of claim 10 such that the encoded NIKl protein and NIKl protein-IP proteins are expressed and bind to each other and (ii) recovering the expressed complex of the NIKl protein and the NIKl protein-IP protein. (48) A methodology for the production of a protein selected from the group consisting of: IP-1, IP-2, IP-3, IP-4, or IP-5, which is comprised of: ( ) growing a cell containing a recombinant nucleic acid encoding said protein such that the encoded protein is expressed and (ii) recovering the expressed protein. (49) A methodology of diagnosing or screening for the presence of, or a predisposition for, developing a disease or disorder which is characterized by an aberrant level of a complex of a NIKl protein and a NIKl protein-IP protein, wherein the NIKl protein-IP is selected from the group consisting of: TrkA, protein phosphatase lα, 14-3-3ε, α-tropomyosin, vimentin, p0071, Ini-1, IP-1, IP-2, IP-3, IP-4, or IP-5, within a subject which is comprised of measuring the level of said complex, RNA encoding the NIKl protein and NIKl protein-IP proteins or functional activity of said complex within a sample derived from the subject; wherein an increase or decrease in the level of said complex, said RNA encoding the NIKl protein and NIKl protein-IP protein, or functional activity of said complex within the sample, relative to the level of said complex, said RNA encoding the NIKl protein and NIKl protein-IP protein or functional activity of said complex found in an analogous sample derived from a subject not having the disease or disorder or a predisposition for developing the disease or disorder, indicates the presence of the disease or disorder or a predisposition for developing the disease or disorder. (50) A methodology of diagnosing or screening for the presence of, or a predisposition for, developing a disease or disorder which is characterized by an aberrant level of a protein or RNA selected from the group consisting of IP-1, IP-2, IP-3, IP-4, or IP-5 protein or RNA, within a subject, which is comprised of measuring the level of said protein, said RNA or the functional activity of said protein within a sample derived from the subject; wherein an increase or decrease in the level of said protein, said RNA or said functional activity within the sample, relative to the level of said protein, said RNA or said functional activity found within an analogous sample derived from a subject not having the disease or disorder or a predisposition for developing the disease or disorder, indicates the presence of the disease or disorder or a predisposition for developing the disease or disorder. (51) A kit comprising, in one or more containers, a substance selected from the group consisting of a complex of a NIKl protein and a NIKl protein-IP, an antibody against said complex, nucleic acid probes which are capable of hybridizing to RNA encoding a NIKl protein and RNA encoding a NIKl protein-IP, or pairs of nucleic acid primers which are capable of priming the amplification of, at least, a portion of a gene encoding a NIKl protein and gene encoding a NIKl protein-IP, in which said NIKl protein-IP is selected from the group consisting of: TrkA, protein phosphatase lα, 14-3-3ε, α-tropomyosin, vimentin, p0071, Ini-1, IP-1, IP-2, IP-3, IP-4, or IP-5. (52) A methodology of treating or preventing a disease or disorder involving aberrant levels of a complex of a NIKl protein and a NIKl protein-IP, wherein the NIKl protein-IP is selected from the group consisting of: TrkA, protein phosphatase lα, 14-3-3ε, α-tropomyosin, vimentin, p0071, Ini-1, IP-1, IP-2, IP-3, IP-4, or IP-5, within a subject, comprised of administering to a subject in which such treatment or prevention is desired, a therapeutically-effective amount of a molecule or molecules which are capable of modulating the function of said complex. (53) The methodology of claim 52, wherein said disease or disorder involves decreased levels of said complex and said molecule or molecules are capable of promoting the function of the complex of a NIKl protein and a NIKl protein-IP, and wherein said molecule or molecules are selected from the group consisting of: (i) a complex of a NIKl protein and NIKl protein-IP; ( /) a derivative or analog of a complex of a NIKl protein and a NIKl protein-IP which is more stable or more active than the wild-type complex; (Hi) nucleic acids encoding a NIKl protein and a NIKl protein-IP and (iv) nucleic acids encoding a derivative or analog of a NIKl protein and a NIKl protein-IP which is capable of forming a complex which is more stable or more active than the wild-type complex. (54) The methodology of claim 52, wherein said disease or disorder involves increased levels of said complex and said molecule or molecules are capable of inhibiting the function of the complex of a NIKl protein and a NIKl protein-IP, and wherein said molecule or molecules are selected from the group consisting of: (/) an antibody against said complex ,or a fragment or derivative thereof, containing the binding region thereof; (ii) a NIKl protein and a NIKl protein- IP antisense nucleic acids and (Hi) nucleic acids comprising, at least, a portion of a NIKl protein and a NIKl protein-IP gene into which a heterologous nucleotide sequence has been inserted such that said heterologous sequence inactivates the biological activity of, at least, a portion of the NIKl protein and NIKl protein-IP genes, and wherein the NIKl protein and the NIKl protein-IP gene portions flank the heterologous sequences so as to promote homologous recombination with the genomic NIKl protein and NIKl protein-IP genes. (55) A methodology of treating or preventing a disease or disorder involving an aberrant level of a NIKl protein-IP selected from the group consisting of: IP-1, IP-2, IP-3, IP-4, or IP-5, within a subject, which is comprised of administering to the subject in which such treatment or prevention is desired, a therapeutically-effective amount of a molecule or molecules which modulates the function of said NIKl protein-IP. (56) The methodology of claim 55, wherein said disease or disorder involves a decreased level of a NIKl protein-IP and said molecule or molecules promote the function of the NIKl protein- IP; and wherein said molecule or molecules are selected from the group consisting of: (i) the NIKl protein-IP protein; (ii) a derivative or analog of the NIKl protein-IP which is capable of binding a NIKl protein; (Hi) a nucleic acid encoding the NIKl protein-IP protein and (iv) a nucleic acid encoding a derivative or analog of the NIKl protein-IP which is capable of binding a NIKl protein. (57) The methodology of claim 55, wherein said disease or disorder involves an increased level of the NIKl protein-IP and said molecule or molecules inhibits the function of the NIKl protein-IP; and wherein said molecule or molecules are selected from the group consisting of: (0 an anti-NlKl protein-IP antibody, or a fragment or derivative thereof containing the binding region thereof; (//) a NIKl protein-IP antisense nucleic acid and (Hi) a nucleic acid comprising, at least, a portion of the NIKl protein-IP gene into which a heterologous nucleotide sequence has been inserted such that said heterologous sequence inactivates the biological activity of, at least, a portion of the NIKl protein-IP gene; wherein the NIKl protein-IP gene portion flanks the heterologous sequence so as to promote homologous recombination with the genomic NIKl protein-IP gene. (58) A methodology for screening a purified complex of a NIKl protein and a NIKl protein-IP selected from the group consisting of: TrkA, protein phosphatase lα, 14-3-3ε, α-tropomyosin, vimentin, p0071, Ini-1, IP-1, IP-2, IP-3, IP-4, or IP-5, or a derivative of said complex, or a modulator of the activity of said complex, for anti-neoplastic activity; wherein said methodology is comprised of measuring the survival or proliferation of cells from a cell line which is derived from, or displays characteristics associated with, malignant disorder; wherein said cells have been contacted with the complex, derivative, or modulator, compaired with the level of said indicator measured in cells not so contacted; and wherein a lower level in said contacted cells indicates that the complex, derivative or modulator possesses anti-neoplastic activity. (59) A methodology for screening a purified complex of a NIKl protein and a NIKl protein-IP selected from the group consisting of: TrkA, protein phosphatase lα, 14-3-3ε, α-tropomyosin, vimentin, p0071, Ini-1, IP-1, IP-2, IP-3, IP-4, or IP-5, or a derivative of said complex, or a modulator of the activity of said complex, for anti-neoplastic activity; wherein said methodology is comprised of administering the complex, derivative or modulator to a test animal which has a tumor, or which does not have a tumor but is subsequently challenged with tumor cells or tumori genie agents, and measuring tumor growth or regression in said test animal; wherein decreased tumor growth or increased tumor regression or prevention of tumor growth within said test animals which were administered the complex, derivative, or modulator, in comparison to said test animals not so administered, indicates that the complex, derivative or modulator possesses anti-neoplastic activity. (60) A methodology for screening a purified complex of a NIKl protein and a NIKl protein-IP selected from the group consisting of: TrkA, protein phosphatase lα, 14-3-3ε, α-tropomyosin, vimentin, p0071, Ini-1, IP-1, IP-2, IP-3, IP-4, or IP-5, or a derivative of said complex, or a modulator of the activity of said complex, for activity in treating or preventing a neurodegenerative disease; wherein said methodology is comprised of contacting cultured cells, which exhibit an indicator of a neurodegenerative disease, in vitro with said complex, derivative or modulator, and comparing the level of said indicator within the cells contacted with the complex, derivative, or modulator with said level of said indicator within cells not so contacted; wherein a lower level within said contacted cells indicates that the complex, derivative or modulator possesses activity in treating or preventing neurodegenerative disease. (61) A methodology for screening a purified complex of a NIKl protein and a NIKl protein-IP selected from the group consisting of: TrkA, protein phosphatase lα, 14-3-3ε, α-tropomyosin, vimentin, p0071, Ini-1, IP-1, IP-2, IP-3, IP-4, or IP-5, or a derivative of said complex, or a modulator of the activity of said complex, for activity in treating or preventing neurodegenerative disease; wherein said methodology is comprised of administering the complex, derivative or modulator to a test animal which exhibits symptoms of a neurodegenerative disease, or which is predisposed to develop symptoms of a neurodegenerative disease, and measuring the change in said symptoms of the neurodegenerative disease after administration of said complex, derivative, or modulator; wherein a reduction in the severity of the symptoms of the neurodegenerative disease, or prevention of the symptoms of the neurodegenerative disease, indicates that the complex, derivative or modulator possesses activity in treating or preventing neurodegenerative disease. (62) A methodology for screening a purified complex of a NIKl protein and a NIKl protein-IP selected from the group consisting of: TrkA, protein phosphatase lα, 14-3-3ε, α-tropomyosin, vimentin, p0071, Ini-1, IP-1, IP-2, IP-3, IP-4, or IP-5, or a derivative of said complex, or a modulator of the activity of said complex, for activity in treating or preventing cardiomyopathy or cardiomyopathy-associated disease; wherein said methodology is comprised of administering said complex, derivative or modulator to a test animal which test exhibits symptoms of a cardiomyopathy or cardiomyopathy-associated disease, or which is predisposed to develop symptoms of a cardiomyopathy or cardiomyopathy-associated disease, and measuring the change in said symptoms of the cardiomyopathy or cardiomyopathy-associated disease after administration of said complex, derivative, or modulator; wherein a reduction in the severity of the symptoms of the cardiomyopathy or cardiomyopathy-associated disease, or prevention of the symptoms of the cardiomyopathy or cardiomyopathy-associated disease, indicates that the complex, derivative or modulator possesses activity in treating or preventing cardiomyopathy or cardiomyopathy-associated disease. (63) A methodology for screening a purified complex of a NIKl protein and a NIKl protein-IP selected from the group consisting of: TrkA, protein phosphatase lα, 14-3-3ε, α-tropomyosin, vimentin, p0071, Ini-1, IP-1, IP-2, IP-3, IP-4, or IP-5, or a derivative of said complex, or a modulator of the activity of said complex, for activity in treating or preventing viral infection and associated diseases; wherein said methodology is comprised of administering said complex, derivative or modulator to a test animal which exhibits symptoms of a viral infection, or which is predisposed to develop symptoms of a viral infection, and measuring the change in said symptoms of the viral infection after administration of said complex, derivative, or modulator; wherein a reduction in the severity of the symptoms of the viral infection or prevention of the symptoms of the viral infection indicates that the complex, derivative or modulator possesses activity in treating or preventing viral infection. (64) A methodology for screening a purified complex of a NIKl protein and a NIKl protein-IP selected from the group consisting of: TrkA, protein phosphatase lα, 14-3-3ε, α-tropomyosin, vimentin, p0071, Ini-1, IP-1, IP-2, IP-3, IP-4, or IP-5, or a derivative of said complex, or a modulator of the activity of said complex, for activity in treating or preventing metabolic diseases and associated disorders; wherein said methodology is comprised of administering said complex, derivative or modulator to a test animal which exhibits symptoms of a metabolic diseases and associated disorders, or which is predisposed to develop symptoms of a metabolic diseases and associated disorders, and measuring the change in said symptoms of the metabolic diseases and associated disorders after administration of said complex, derivative, or modulator; wherein a reduction in the severity of the symptoms of the metabolic diseases and associated disorders, or prevention of the symptoms of the metabolic diseases and associated disorders, indicates that the complex, derivative or modulator possesses activity in treating or preventing metabolic diseases and associated disorders. (65) A methodology of screening for a molecule or molecules which modulate, directly or indirectly, the formation of a complex of a NIKl protein and a NIKl protein-IP, in which said NIKl protein-IP is selected from the group consisting of: TrkA, protein phosphatase lα, 14-3-3ε, α-tropomyosin, vimentin, p0071, Ini-1, IP-1, IP-2, IP-3, IP-4, or IP-5; wherein said methodology is comprised of measuring the levels of said complex formed from a NIKl protein and a NIKl protein-IP in the presence of said molecule or molecules under conditions which are conducive to formation of said complex, and comparing the levels of said complex with those levels of said complex which are formed in the absence of said molecule or molecules; wherein a lower or higher level of said complex in the presence of said molecule or molecules indicates that the molecule or molecules possess the ability to modulate the formation of said complex. (66) A recombinant, non-human animal, or ancestor thereof, wherein both an endogenous NIKl protein gene and an endogenous NIKl protein-IP gene selected from the group consisting of: TrkA, protein phosphatase lα, 14-3-3ε, α-tropomyosin, vimentin, p0071, Ini-1, IP-1, IP-2, IP-3, IP-4, or IP-5 have been deleted or inactivated by homologous recombination or insertional mutagenesis. (67) A recombinant, non-human animal, or ancestor thereof, containing both a NIKl protein gene and a NIKl protein-IP gene selected from the group consisting of: TrkA, protein phosphatase lα, 14-3-3ε, α-tropomyosin, vimentin, p0071, Ini-1, IP-1, IP-2, IP-3, IP-4, or IP-5, wherein the NIKl protein gene is under the control of a promoter which is not the promoter of the native NIKl protein gene and the NIKl protein-IP gene is under the control of a promoter which is not the promoter of the native NIKl protein-IP gene. (68) A recombinant, non-human animal, or ancestor thereof, containing a transgene comprising a nucleic acid sequence encoding the chimeric protein of claim 7. (69) A recombinant, non-human animal, or ancestor thereof, containing a transgene comprising the nucleotide sequence of SEQ ID NO.: 17; SEQ ID NO: 19, SEQ ID NO:21; SEQ ID NO.:23 and SEQ ID NO.:25. (70) A methodology of modulating the activity or levels of a NIKl protein; wherein said methodology is comprised of contacting a cell with, or administering to, an animal expressing a NIKl protein gene, a protein selected from the group consisting of: TrkA, protein phosphatase 1 α, 14-3-3ε, α-tropomyosin, vimentin, p0071, Ini-1, IP-1, IP-2, IP-3, IP-4, or IP-5, or a nucleic acid encoding said protein, or an antibody which immunospecifically-binds said protein, or a fragment or derivative of said antibody containing the binding domain thereof. (71) A methodology of modulating the activity or levels of a protein selected from the group consisting of: TrkA, protein phosphatase lα, 14-3-3ε, α-tropomyosin, vimentin, p0071, Ini-1, IP-1, IP-2, IP-3, IP-4, or IP-5; wherein said methodology is comprised of contacting a cell with, or administering to, an animal expressing a gene encoding said protein, a NIKl protein, a nucleic acid encoding a NIKl protein, or an antibody which immunospecifically-binds a NIKl protein, or a fragment or derivative of said antibody containing the binding domain thereof. (72) A methodology of modulating the activity or levels of a complex of a NIKl protein and a protein selected from the group consisting of: TrkA, protein phosphatase lα, 14-3-3ε, α-tropomyosin, vimentin, p0071, Ini-1, IP-1, IP-2, IP-3, IP-4, or IP-5; wherein said methodology is comprised of contacting a cell with, or administering to an animal expressing and forming said complex, a molecule which possesses the ability to modulate the formation of said complex. (73) A methodology for identifying a molecule which possesses the ability to modulate the activity of a NIKl protein or a protein selected from the group consisting of: TrkA, protein phosphatase lα, 14-3-3ε, α-tropomyosin, vimentin, p0071, Ini-1, IP-1, IP-2, IP-3, IP-4, or IP-5, or a complex of a NIKl protein and said protein; wherein said methodology is comprised of contacting one or more candidate molecules with a NIKl protein in the presence of said protein, and measuring the amount of complex which forms between the NIKl protein and said protein; and wherein an increase or decrease in the amount of complex which forms, relative to the amount of complex which forms in the absence of the candidate molecule or molecules, indicates that the molecule or molecules possess the ability to modulate the activity of a NIKl protein, said protein or said complex of a NIKl protein and said protein. (74) The methodology of claim 73, wherein said contacting is carried out by administering the candidate molecule or molecules to the recombinant, non-human animal, or ancestor thereof, of claim 68. (75) The methodology of claim 73, wherein said contacting is carried out in vitro; and the NIKl protein, said protein, and said candidate molecule or molecules are purified. (76) A methodology for screening a derivative or analog of a NIKl protein for biological activity; wherein said methodolgy is comprised of contacting said derivative or analog of the NIKl protein with a protein selected from the group consisting of: TrkA, protein phosphatase lα, 14-3-3ε, α-tropomyosin, vimentin, p0071, Ini-1, IP-1, IP-2, IP-3, IP-4, or IP-5, and detecting the formation of a complex between said derivative or analog of the NIKl protein and said protein; and wherein detecting formation of said complex, indicates that said derivative or analog of the NIKl protein possesses biological activity. (77) A methodology for screening a derivative or analog of a protein selected from the group consisting of: TrkA, protein phosphatase lα, 14-3-3ε, α-tropomyosin, vimentin, p0071, Ini-1, IP-1, IP-2, IP-3, IP-4, or IP-5, for biological activity; wherein said methodology is comprised of contacting said derivative or analog of said protein with the NIKl protein, and detecting the formation of a complex between said derivative or analog of said protein and the NIKl protein; and wherein detecting the formation of said complex, indicates that said derivative or analog of said protein possesses biological activity. (78) A methodology of monitoring the efficacy of a treatment of a disease or disorder characterized by an aberrant level of a complex of a NIKl protein and a NIKl protein-IP, in a subject which is administered said treatment for said disease or disorder; wherein said methodology is comprised of measuring the level of said complex, the RNAs encoding the NIKl protein and the NIKl protein-IP or the functional activity of said complex within a sample derived from said subject, wherein said sample is taken from said subject after the administration of said treatment, and compared to (i) said level within a sample taken from said subject prior to the administration of the treatment or ( ) a standard level associated with the pre-treatment stage of the disease or disorder; and wherein the change, or lack of change, in the level of said complex, said RNAs encoding the NIKl protein and the NIKl protein-IP or functional activity of said complex within said sample taken after the administration of said treatment, relative to the level of said complex, said RNAs encoding the NIKl protein and the NIKl protein-IP or functional activity of said complex within said sample taken before the administration of said treatment, or to said standard level, indicates whether said administration is effective in the treatment of said disease or disorder. (79) A methodology of treating or preventing cancer, or a hyperproliferative disorder, within a subject; wherein said methodology is comprised of administering to a subject, in which such treatment or prevention is desired, a therapeutically-effective amount of a molecule or molecules which possess the ability to modulate the function of a complex of the NIKl protein and a NIKl protein-IP selected from the group consisting of: TrkA, protein phosphatase lα, 14-3-3ε, α- tropomyosin, vimentin, p0071, Ini-1, IP-1, IP-2, IP-3, IP-4, or IP-5, or a combination of one or more of the aforementioned NIKl protein-IPs. (80) A methodology of treating or preventing neurodegenerative disease within a subject; wherein said methodology is comprised of administering to a subject, in which such treatment or prevention is desired, a therapeutically-effective amount of a molecule or molecules which possesses the ability to modulate the function of a complex of the NIKl protein and a NIKl protein-IP selected from the group consisting of: TrkA, protein phosphatase lα, 14-3-3ε, α- tropomyosin, vimentin, p0071, Ini-1, IP-1, IP-2, IP-3, IP-4, or IP-5, or a combination of one or more of the aforementioned NIKl protein-IPs. (81) A methodology of treating or preventing cardiomyopathies, or an associated disease, within a subject; wherein said methodology is comprised of administering to a subject, in which such treatment or prevention is desired, a therapeutically-effective amount of a molecule or molecules which possesses the ability to modulate the function of a complex of the NIKl protein and a NIKl protein-IP selected from the group consisting of: TrkA, protein phosphatase lα, 14-3-3ε, α-tropomyosin, vimentin, p0071, Ini-1, IP-1, IP-2, IP-3, IP-4, or IP-5, or a combination of one or more of the aforementioned NIKl protein-IPs. (82) A methodology of treating or preventing viral infections, or an associated disease, within a subject; wherein said methodology is comprised of administering to a subject, in which such treatment or prevention is desired, a therapeutically-effective amount of a molecule or molecules which possess the ability to modulate the function of a complex of the NIKl protein and a NIKl protein-IP selected from the group consisting of: TrkA, protein phosphatase lα, 14-3-3ε, α-tropomyosin, vimentin, p0071, Ini-1, IP-1, IP-2, IP-3, IP-4, or IP-5, or a combination of one or more of the aforementioned NIKl protein-IPs. (83) A methodology of treating or preventing metabolic disorders, or an associated disease, within a subject; wherein said methodology is comprised of administering to a subject, in which such treatment or prevention is desired, a therapeutically-effective amount of a molecule which possesses the ability to modulate the function of a complex of NIKl protein and a NIKl protein- IP protein selected from the group consisting of: TrkA, protein phosphatase lα, 14-3-3ε, α-tropomyosin, vimentin, p0071, Ini-1, IP-1, IP-2, IP-3, IP-4, or IP-5, or a combination of one or more of the aforementioned NIKl protein-IPs. (84) A purified fragment of a protein selected from the group consisting of: TrkA, protein phosphatase lα, 14-3-3ε, α-tropomyosin, vimentin, p0071, Ini-1, IP-1, IP-2, IP-3, IP-4 and IP-5; wherein said fragment possesses the ability to bind the NIKl protein.

Inventors: NANDABALAN KRISHNAN, SCHULZ VINCENT P, YANG MEIJIA, NANDABALAN, KRISHNAN, SCHULZ, VINCENT, P., YANG, MEIJIA
Applicants: CURAGEN CORP, NANDABALAN KRISHNAN, SCHULZ VINCENT P, YANG MEIJIA, CURAGEN CORPORATION, NANDABALAN, KRISHNAN, SCHULZ, VINCENT, P., YANG, MEIJIA
Application year: 1999
Main classification: C07K14
IPC codes: A61K31, A61K38, A61K39, A61K48, A61P3, A61P9, A61P25, A61P31, A61P35, A61P43, C07K14, C07K16, C07K19, C12N1, C12N5, C12N9, C12N15, C12P21, C12Q1, G01N33