# Patent

## Title
Protein (poly)peptides libraries

## Abstract

The present invention relates to a method of identifying one or more genes encoding one or more proteins having an optimized property. In particular, the method comprises expressing a collection of genes and screening for a desired property, identifying a plurality of genes having the desired property, and replacing one or more one or more sub-sequences of each of said genes with a different, compatible genetic sub-sequence, and screening again in order to identify genes encoding proteins having an optimized property.

## Background
This application is a continuation of U.S. patent application Ser. No. 10/834,397, filed Apr. 29, 2004, which is a division of application Ser. No. 09/490,324, filed Jan. 24, 2000, now U.S. Pat. No. 6,828,422, which is a continuation of international application PCT/EP96/03647, filed Aug. 19, 1996, which claims priority to European Application No. 95 11 3021.0, filed Aug. 18, 1995. The contents of each of these application are hereby incorporated by reference in their entireties.


FIELD OF THE INVENTION
The present invention relates to synthetic DNA sequences which encode one or more collections of homologous proteins/(poly)peptides, and methods for generating and applying libraries of these DNA sequences. In particular, the invention relates to the preparation of a library of human-derived antibody genes by the use of synthetic consensus sequences which cover the structural repertoire of antibodies encoded in the human genome. Furthermore, the invention relates to the use of a single consensus antibody gene as a universal framework for highly diverse antibody libraries.
BACKGROUND TO THE INVENTION
All current recombinant methods which use libraries of proteins/(poly)peptides, e.g. antibodies, to screen for members with desired properties, e.g. binding a given ligand, do not provide the possibility to improve the desired properties of the members in an easy and rapid manner. Usually a library is created either by inserting a random oligonucleotide sequence into one or more DNA sequences cloned from an organism, or a family of DNA sequences is cloned and used as the library. The library is then screened, e.g. using phage display, for members which show the desired property. The sequences of one or more of these resulting molecules are then determined. There is no general procedure available to improve these molecules further on.
Winter (EP 0 368 684 B1) has provided a method for amplifying (by PCR), cloning, and expressing antibody variable region genes. Starting with these genes he was able to create libraries of functional antibody fragments by randomizing the CDR3 of the heavy and/or the light chain. This process is functionally equivalent to the natural process of VJ and VDJ recombination which occurs during the development of B-cells in the immune system.
However the Winter invention does not provide a method for optimizing the binding affinities of antibody fragments further on, a process which would be functionally equivalent to the naturally occurring phenomenon of “affinity maturation”, which is provided by the present invention. Furthermore, the Winter invention does not provide for artificial variable region genes, which represent a whole family of structurally similar natural genes, and which can be assembled from synthetic DNA oligonucleotides. Additionally, Winter does not enable the combinatorial assembly of portions of antibody variable regions, a feature which is provided by the present invention. Furthermore, this approach has the disadvantage that the genes of all antibodies obtained in the screening procedure have to be completely sequenced, since, except for the PCR priming regions, no additional sequence information about the library members is available. This is time and labor intensive and potentially leads to sequencing errors.
The teaching of Winter as well as other approaches have tried to create large antibody libraries having high diversity in the complementarity determining regions (CDRs) as well as in the frameworks to be able to find antibodies against as many different antigens as possible. It has been suggested that a single universal framework may be useful to build antibody libraries, but no approach has yet been successful.
Another problem lies in the production of reagents derived from antibodies. Small antibody fragments show exciting promise for use as therapeutic agents, diagnostic reagents, and for biochemical research. Thus, they are needed in large amounts, and the expression of antibody fragments, e.g. Fv, single-chain Fv (scFv), or Fab in the periplasm of E. coli (Skerra & Plückthun, 1988; Better et al., 1988) is now used routinely in many laboratories. Expression yields vary widely, however. While some fragments yield up to several mg of functional, soluble protein per liter and OD of culture broth in shake flask culture (Carter et al., 1992, Plückthun et al. 1996), other fragments may almost exclusively lead to insoluble material, often found in so-called inclusion bodies. Functional protein may be obtained from the latter in modest yields by a laborious and time-consuming refolding process. The factors influencing antibody expression levels are still only poorly understood. Folding efficiency and stability of the antibody fragments, protease lability and toxicity of the expressed proteins to the host cells often severely limit actual production levels, and several attempts have been tried to increase expression yields. For example, Knappik & Plückthun (1995) could show that expression yield depends on the antibody sequence. They identified key residues in the antibody framework which influence expression yields dramatically. Similarly, Ullrich et al. (1995) found that point mutations in the CDRs can increase the yields in periplasmic antibody fragment expression. Nevertheless, these strategies are only applicable to a few antibodies. Since the Winter invention uses existing repertoires of antibodies, no influence on expressibility of the genes is possible.
Furthermore, the findings of Knappik & Plückthun and Ullrich demonstrate that the knowledge about antibodies, especially about folding and expression is still increasing. The Winter invention does not allow to incorporate such improvements into the library design.
The expressibility of the genes is important for the library quality as well, since the screening procedure relies in most cases on the display of the gene product on a phage surface, and efficient display relies on at least moderate expression of the gene.
These disadvantages of the existing methodologies are overcome by the present invention, which is applicable for all collections of homologous proteins. It has the following novel and useful features illustrated in the following by antibodies as an example:
Artificial antibodies and fragments thereof can be constructed based on known antibody sequences, which reflect the structural properties of a whole group of homologous antibody genes. Therefore it is possible to reduce the number of different genes without any loss in the structural repertoire. This approach leads to a limited set of artificial genes, which can be synthesized de novo, thereby allowing introduction of cleavage sites and removing unwanted cleavages sites. Furthermore, this approach enables (i), adapting the codon usage of the genes to that of highly expressed genes in any desired host cell and (ii), analyzing all possible pairs of antibody light (L) and heavy (H) chains in terms of interaction preference, antigen preference or recombinant expression titer, which is virtually impossible using the complete collection of antibody genes of an organism and all combinations thereof.
The use of a limited set of completely synthetic genes makes it possible to create cleavage sites at the boundaries of encoded structural sub-elements. Therefore, each gene is built up from modules which represent structural sub-elements on the protein/(poly)peptide level. In the case of antibodies, the modules consist of “framework” and “CDR” modules. By creating separate framework and CDR modules, different combinatorial assembly possibilities are enabled. Moreover, if two or more artificial genes carry identical pairs of cleavage sites at the boundaries of each of the genetic sub-elements, pre-built libraries of sub-elements can be inserted in these genes simultaneously, without any additional information related to any particular gene sequence. This strategy enables rapid optimization of, for example, antibody affinity, since DNA cassettes encoding libraries of genetic sub-elements can be (i), pre-built, stored and reused and (ii), inserted in any of these sequences at the right position without knowing the actual sequence or having to determine the sequence of the individual library member.
Additionally, new information about amino acid residues important for binding, stability, or solubility and expression could be integrated into the library design by replacing existing modules with modules modified according to the new observations.
The limited number of consensus sequences used for creating the library allows to speed up the identification of binding antibodies after screening. After having identified the underlying consensus gene sequence, which could be done by sequencing or by using fingerprint restriction sites, just those part(s) comprising the random sequence(s) have to be determined. This reduces the probability of sequencing errors and of false-positive results.
The above mentioned cleavage sites can be used only if they are unique in the vector system where the artificial genes have been inserted. As a result, the vector has to be modified to contain none of these cleavage sites. The construction of a vector consisting of basic elements like resistance gene and origin of replication, where cleavage sites have been removed, is of general interest for many cloning attempts. Additionally, these vector(s) could be part of a kit comprising the above mentioned artificial genes and pre-built libraries.
The collection of artificial genes can be used for a rapid humanization procedure of non-human antibodies, preferably of rodent antibodies. First, the amino acid sequence of the non-human, preferably rodent antibody is compared with the amino acid sequences encoded by the collection of artificial genes to determine the most homologous light and heavy framework regions. These genes are then used for insertion of the genetic sub-elements encoding the CDRs of the non-human, preferably rodent antibody.
Surprisingly, it has been found that with a combination of only one consensus sequence for each of the light and heavy chains of a scFv fragment an antibody repertoire could be created yielding antibodies against virtually every antigen. Therefore, one aspect of the present invention is the use of a single consensus sequence as a universal framework for the creation of useful (poly)peptide libraries and antibody consensus sequences useful therefor.
DETAILED DESCRIPTION OF THE INVENTION
The present invention enables the creation of useful libraries of (poly)peptides. In a first embodiment, the invention provides for a method of setting up nucleic acid sequences suitable for the creation of said libraries. In a first step, a collection of at least three homologous proteins is identified and then analyzed. Therefore, a database of the protein sequences is established where the protein sequences are aligned to each other. The database is used to define subgroups of protein sequences which show a high degree of similarity in both the sequence and, if information is available, in the structural arrangement. For each of the subgroups a (poly)peptide sequence comprising at least one consensus sequence is deduced which represents the members of this subgroup; the complete collection of (poly)peptide sequences represent therefore the complete structural repertoire of the collection of homologous proteins. These artificial (poly)peptide sequences are then analyzed, if possible, according to their structural properties to identify unfavorable interactions between amino acids within said (poly)peptide sequences or between said or other (poly)peptide sequences, for example, in multimeric proteins. Such interactions are then removed by changing the consensus sequence accordingly. The (poly)peptide sequences are then analyzed to identify sub-elements such as domains, loops, helices or CDRs. The amino acid sequence is backtranslated into a corresponding coding nucleic acid sequence which is adapted to the codon usage of the host planned for expressing said nucleic acid sequences. A set of cleavage sites is set up in a way that each of the sub-sequences encoding the sub-elements identified as described above, is flanked by two sites which do not occur a second time within the nucleic acid sequence. This can be achieved by either identifying a cleavage site already flanking a sub-sequence of by changing one or more nucleotides to create the cleavage site, and by removing that site from the remaining part of the gene. The cleavage sites should be common to all corresponding sub-elements or sub-sequences, thus creating a fully modular arrangement of the sub-sequences in the nucleic acid sequence and of the sub-elements in the corresponding (poly)peptide.
In a further embodiment, the invention provides for a method which sets up two or more sets of (poly)peptides, where for each set the method as described above is performed, and where the cleavage sites are not only unique within each set but also between any two sets. This method can be applied for the creation of (poly)peptide libraries comprising for example two α-helical domains from two different proteins, where said library is screened for novel hetero-association domains.
In yet a further embodiment, at least two of the sets as described above, are derived from the same collection of proteins or at least a part of it. This describes libraries comprising for example, but not limited to, two domains from antibodies such as VH and VL, or two extracellular loops of transmembrane receptors.
In another embodiment, the nucleic acid sequences set up as described above, are synthesized. This can be achieved by any one of several methods well known to the practitioner skilled in the art, for example, by total gene synthesis or by PCR-based approaches.
In one embodiment, the nucleic acid sequences are cloned into a vector. The vector could be a sequencing vector, an expression vector or a display (e.g. phage display) vector, which are well known to those skilled in the art. Any vector could comprise one nucleic acid sequence, or two or more nucleic sequences, either in different or the same operon. In the last case, they could either be cloned separately or as contiguous sequences.
In one embodiment, the removal of unfavorable interactions as described above, leads to enhanced expression of the modified (poly)peptides.
In a preferred embodiment, one or more sub-sequences of the nucleic acid sequences are replaced by different sequences. This can be achieved by excising the sub-sequences using the conditions suitable for cleaving the cleavage sites adjacent to or at the end of the sub-sequence, for example, by using a restriction enzyme at the corresponding restriction site under the conditions well known to those skilled in the art, and replacing the sub-sequence by a different sequence compatible with the cleaved nucleic acid sequence. In a further preferred embodiment, the different sequences replacing the initial sub-sequence(s) are genomic or rearranged genomic sequences, for example in grafting CDRs from non-human antibodies onto consensus antibody sequences for rapid humanization of non-human antibodies. In the most preferred embodiment, the different sequences are random sequences, thus replacing the sub-sequence by a collection of sequences to introduce variability and to create a library. The random sequences can be assembled in various ways, for example by using a mixture of mononucleotides or preferably a mixture of trinucleotides (Virnekäs et al., 1994) during automated oligonucleotide synthesis, by error-prone PCR or by other methods well known to the practitioner in the art. The random sequences may be completely randomized or biased towards or against certain codons according to the amino acid distribution at certain positions in known protein sequences. Additionally, the collection of random sub-sequences may comprise different numbers of codons, giving rise to a collection of sub-elements having different lengths.
In another embodiment, the invention provides for the expression of the nucleic acid sequences from a suitable vector and under suitable conditions well known to those skilled in the art.
In a further preferred embodiment, the (poly)peptides expressed from said nucleic acid sequences are screened and, optionally, optimized. Screening may be performed by using one of the methods well known to the practitioner in the art, such as phage-display, selectively infective phage, polysome technology to screen for binding, assay systems for enzymatic activity or protein stability. (Poly)peptides having the desired property can be identified by sequencing of the corresponding nucleic acid sequence or by amino acid sequencing or mass spectrometry. In the case of subsequent optimization, the nucleic acid sequences encoding the initially selected (poly)peptides can optionally be used without sequencing. Optimization is performed by repealing the replacement of sub-sequences by different sequences, preferably by random sequences, and the screening step one or more times.
The desired property the (poly)peptides are screened for is preferably, but not exclusively, selected from the group of optimized affinity or specificity for a target molecule, optimized enzymatic activity, optimized expression yields, optimized stability and optimized solubility.
In one embodiment, the cleavage sites flanking the sub-sequences are sites recognized and cleaved by restriction enzymes, with recognition and cleavage sequences being either identical or different, the restricted sites either having blunt or sticky ends.
The length of the sub-elements is preferably, but not exclusively ranging between 1 amino acid, such as one residue in the active site of an enzyme or a structure-determining residue, and 150 amino acids, as for whole protein domains. Most preferably, the length ranges between 3 and 25 amino acids, such as most commonly found in CDR loops of antibodies.
The nucleic acid sequences could be RNA or, preferably, DNA.
In one embodiment, the (poly)peptides have an amino acid pattern characteristic of a particular species. This can for example be achieved by deducing the consensus sequences from a collection of homologous proteins of just one species, most preferably from a collection of human proteins. Since the (poly)peptides comprising consensus sequences are artificial, they have to be compared to the protein sequence(s) having the closest similarity to ensure the presence of said characteristic amino acid pattern.
In one embodiment, the invention provides for the creation of libraries of (poly)peptides comprising at least part of members or derivatives of the immunoglobulin superfamily, preferably of member or derivatives of the immunoglobulins. Most preferably, the invention provides for the creation of libraries of human antibodies, wherein said (poly)peptides are or are derived from heavy or light chain variable regions wherein said structural sub-elements are framework regions (FR) 1, 2, 3, or 4 or complementary determining regions (CDR) 1, 2, or 3. In a first step, a database of published antibody sequences of human origin is established where the antibody sequences are aligned to each other. The database is used to define subgroups of antibody sequences which show a high degree of similarity in both the sequence and the canonical fold of CDR loops (as determined by analysis of antibody structures). For each of the subgroups a consensus sequence is deduced which represents the members of this subgroup; the complete collection of consensus sequences represent therefore the complete structural repertoire of human antibodies.
These artificial genes are then constructed e.g. by total gene synthesis or by the use of synthetic genetic subunits. These genetic subunits correspond to structural sub-elements on the (poly)peptide level. On the DNA level, these genetic subunits are defined by cleavage sites at the start and the end of each of the sub-elements, which are unique in the vector system. All genes which are members of the collection of consensus sequences are constructed such that they contain a similar pattern of corresponding genetic sub-sequences. Most preferably, said (poly)peptides are or are derived from the HuCAL consensus genes: Vκ1, Vκ2, Vκ3, Vκ4, Vλ1, Vλ2, Vλ3, VH1A, VH1B, VH2, VH3, VH4, VH5, VH6, Cκ, Cλ, CH1 or any combination of said HuCAL consensus genes.
This collection of DNA molecules can then be used to create libraries of antibodies or antibody fragments, preferably Fv, disulphide-linked Fv, single-chain Fv (scFv), or Fab fragments, which may be used as sources of specificities against new target antigens. Moreover, the affinity of the antibodies can be optimized using pre-built library cassettes and a general procedure. The invention provides a method for identifying one or more genes encoding one or more antibody fragments which binds to a target, comprising the steps of expressing the antibody fragments, and then screening them to isolate one or more antibody fragments which bind to a given target molecule. Preferably, an scFv fragment library comprising the combination of HuCAL VH3 and HuCAL Vλ2 consensus genes and at least a random sub-sequence encoding the heavy chain CDR3 sub-element is screened for binding antibodies. If necessary, the modular design of the genes can then be used to excise from the genes encoding the antibody fragments one or more genetic sub-sequences encoding structural sub-elements, and replacing them by one or more second sub-sequences encoding structural sub-elements. The expression and screening steps can then be repeated until an antibody having the desired affinity is generated.
Particularly preferred is a method in which one or more of the genetic subunits (e.g. the CDRs) are replaced by a random collection of sequences (the library) using the said cleavage sites. Since these cleavage sites are (i) unique in the vector system and (ii) common to all consensus genes, the same (pre-built) library can be inserted into all artificial antibody genes. The resulting library is then screened against any chosen antigen. Binding antibodies are selected, collected and used as starting material for the next library. Here, one or more of the remaining genetic subunits are randomized as described above.
A further embodiment of the present invention relates to fusion proteins by providing for a DNA sequence which encodes both the (poly)peptide, as described above, as well as an additional moiety. Particularly preferred are moieties which have a useful therapeutic function. For example, the additional moiety may be a toxin molecule which is able to kill cells (Vitetta et al., 1993). There are numerous examples of such toxins, well known to the one skilled in the art, such as the bacterial toxins Pseudomonas exotoxin A, and diphtheria toxin, as well as the plant toxins ricin, abrin, modeccin, saporin, and gelonin. By fusing such a toxin for example to an antibody fragment, the toxin can be targeted to, for example, diseased cells, and thereby have a beneficial therapeutic effect. Alternatively, the additional moiety may be a cytokine, such as IL-2 (Rosenberg & Lotze, 1986), which has a particular effect (in this case a T-cell proliferative effect) on a family of cells. In a further embodiment, the additional moiety may confer on its (poly)peptide partner a means of detection and/or purification. For example, the fusion protein could comprise the modified antibody fragment and an enzyme commonly used for detection purposes, such as alkaline phosphatase (Blake et al., 1984). There are numerous other moieties which can be used as detection or purification tags, which are well known to the practitioner skilled in the art. Particularly preferred are peptides comprising at least five histidine residues (Hochuli et al., 1988), which are able to bind to metal ions, and can therefore be used for the purification of the protein to which they are fused (Lindner et al., 1992). Also provided for by the invention are additional moieties such as the commonly used C-myc and FLAG tags (Hopp et al., 1988; Knappik & Plückthun, 1994).
By engineering one or more fused additional domains, antibody fragments or any other (poly)peptide can be assembled into larger molecules which also fall under the scope of the present invention. For example, mini-antibodies (Pack, 1994) are dimers comprising two antibody fragments, each fused to a self-associating dimerization domain. Dimerization domains which are particularly preferred include those derived from a leucine zipper (Pack & Plückthun, 1992) or helix-turn-helix motif (Pack et al., 1993).
All of the above embodiments of the present invention can be effected using standard techniques of molecular biology known to anyone skilled in the art.
In a further embodiment, the random collection of sub-sequences (the library) is inserted into a singular nucleic acid sequence encoding one (poly)peptide, thus creating a (poly)peptide library based on one universal framework. Preferably a random collection of CDR sub-sequences is inserted into a universal antibody framework, for example into the HuCAL H3κ2 single-chain Fv fragment described above.
In further embodiments, the invention provides for nucleic acid sequence(s), vector(s) containing the nucleic acid sequence(s), host cell(s) containing the vector(s), and (poly)peptides, obtainable according to the methods described above.
In a further preferred embodiment, the invention provides for modular vector systems being compatible with the modular nucleic acid sequences encoding the (poly)peptides. The modules of the vectors are flanked by restriction sites unique within the vector system and essentially unique with respect to the restriction sites incorporated into the nucleic acid sequences encoding the (poly)peptides, except for example the restriction sites necessary for cloning the nucleic acid sequences into the vector. The list of vector modules comprises origins of single-stranded replication, origins of double-stranded replication for high- and low copy number plasmids, promotor/operator, repressor or terminator elements, resistance genes, potential recombination sites, gene III for display on filamentous phages, signal sequences, purification and detection tags, and sequences of additional moieties.
The vectors are preferably, but not exclusively, expression vectors or vectors suitable for expression and screening of libraries.
In another embodiment, the invention provides for a kit, comprising one or more of the list of nucleic acid sequence(s), recombinant vector(s), (poly)peptide(s), and vector(s) according to the methods described above, and suitable host cell(s) for producing the (poly)peptide(s).
In a preferred embodiment, the invention provides for the creation of libraries of human antibodies. In a first step, a database of published antibody sequences of human origin is established: The database is used to define subgroups of antibody sequences which show a high degree of similarity in both the sequence and the canonical fold (as determined by analysis of antibody structures). For each of the subgroups a consensus sequence is deduced which represents the members of this subgroup; the complete collection of consensus sequences represent therefore the complete structural repertoire of human antibodies.
These artificial genes are then constructed by the use of synthetic genetic subunits. These genetic subunits correspond to structural sub-elements on the protein level. On the DNA level, these genetic subunits are defined by cleavage sites at the start and the end of each of the subelements, which are unique in the vector system. All genes which are members of the collection of consensus sequences are constructed such that they contain a similar pattern of said genetic subunits.
This collection of DNA molecules can then be used to create libraries of antibodies which may be used as sources of specificities against new target antigens. Moreover, the affinity of the antibodies can be optimised using pre-built library cassettes and a general procedure. The invention provides a method for identifying one or more genes encoding one or more antibody fragments which binds to a target, comprising the steps of expressing the antibody fragments, and then screening them to isolate one or more antibody fragments which bind to a given target molecule. If necessary, the modular design of the genes can then be used to excise from the genes encoding the antibody fragments one or more genetic sub-sequences encoding structural sub-elements, and replacing them by one or more second sub-sequences encoding structural sub-elements. The expression and screening steps can then be repeated until an antibody having the desired affinity is generated.
Particularly preferred is a method in which one or more of the genetic subunits (e.g. the CDR's) are replaced by a random collection of sequences (the library) using the said cleavage sites. Since these cleavage sites are (i) unique in the vector system and (ii) common to all consensus genes, the same (pre-built) library can be inserted into all artificial antibody genes. The resulting library is then screened against any chosen antigen. Binding antibodies are eluted, collected and used as starting material for the next library. Here, one or more of the remaining genetic subunits are randomised as described above.
DEFINITIONS
Protein:
The term protein comprises monomeric polypeptide chains as well as homo- or heteromultimeric complexes of two or more polypeptide chains connected either by covalent interactions (such as disulphide bonds) or by non-covalent interactions (such as hydrophobic or electrostatic interactions).
Analysis of Homologous Proteins:
The amino acid sequences of three or more proteins are aligned to each other (allowing for introduction of gaps) in a way which maximizes the correspondence between identical or similar amino acid residues at all positions. These aligned sequences are termed homologous if the percentage of the sum of identical and/or similar residues exceeds a defined threshold. This threshold is commonly regarded by those skilled in the art as being exceeded when at least 15% of the amino acids in the aligned genes are identical, and at least 30% are similar. Examples for families of homologous proteins are: immunoglobulin superfamily, scavenger receptor superfamily, fibronectin superfamilies (e.g. type II and III), complement control protein superfamily, cytokine receptor superfamily, cystine knot proteins, tyrosine kinases, and numerous other examples well known to one of ordinary skill in the art.
Consensus Sequence:
Using a matrix of al least three aligned amino acid sequences, and allowing for gaps in the alignment, it is possible to determine the most frequent amino acid residue at each position. The consensus sequence is that sequence which comprises the amino acids which are most frequently represented at each position. In the event that two or more amino acids are equally represented at a single position, the consensus sequence includes both or all of those amino acids.
Removing Unfavorable Interactions:
The consensus sequence is per se in most cases artificial and has to be analyzed in order to change amino acid residues which, for example, would prevent the resulting molecule to adapt a functional tertiary structure or which would block the interaction with other (poly)peptide chains in multimeric complexes. This can be done either by (i) building a three-dimensional model of the consensus sequence using known related structures as a template, and identifying amino acid residues within the model which may interact unfavorably with each other, or (ii) analyzing the matrix of aligned amino acid sequences in order to detect combinations of amino acid residues within the sequences which frequently occur together in one sequence and are therefore likely to interact with each other. These probable interaction-pairs are then tabulated and the consensus is compared with these “interaction maps”. Missing or wrong interactions in the consensus are repaired accordingly by introducing appropriate changes in amino acids which minimize unfavorable interactions.
Identification of Structural Sub-Elements:
Structural sub-elements are stretches of amino acid residues within a protein/(poly)peptide which correspond to a defined structural or functional part of the molecule. These can be loops (e.g. CDR loops of an antibody) or any other secondary or functional structure within the protein/(poly)peptide (domains. α-helices, β-sheets, framework regions of antibodies, etc.). A structural sub-element can be identified using known structures of similar or homologous (poly)peptides, or by using the above mentioned matrices of aligned amino acid sequences. Here the variability at each position is the basis for determining stretches of amino acid residues which belong to a structural sub-element (e.g. hypervariable regions of an antibody).
Sub-Sequence:
A sub-sequence is defined as a genetic module which is flanked by unique cleavage sites and encodes at least one structural sub-element. It is not necessarily identical to a structural sub-element.
Cleavage Site:
A short DNA sequence which is used as a specific target for a reagent which cleaves DNA in a sequence-specific manner (e.g. restriction endonucleases).
Compatible Cleavage Sites:
Cleavage sites are compatible with each other, if they can be efficiently ligated without modification and, preferably, also without adding an adapter molecule.
Unique Cleavage Sites:
A cleavage site is defined as unique if it occurs only once in a vector containing at least one of the genes of interest, or if a vector containing at least one of the genes of interest could be treated in a way that only one of the cleavage sites could be used by the cleaving agent.
Corresponding (Poly)Peptide Sequences:
Sequences deduced from the same part of one group of homologous proteins are called corresponding (poly)peptide sequences.
Common Cleavage Sites:
A cleavage site in at least two corresponding sequences, which occurs at the same functional position (i.e. which flanks a defined sub-sequence), which can be hydrolyzed by the same cleavage tool and which yields identical compatible ends is termed a common cleavage site.
Excising Genetic Sub-Sequences:
A method which uses the unique cleavage sites and the corresponding cleavage reagents to cleave the target DNA at the specified positions in order to isolate, remove or replace the genetic sub-sequence flanked by these unique cleavage sites.
Exchanging Genetic Sub-Sequences:
A method by which an existing sub-sequence is removed using the flanking cleavage sites of this sub-sequence, and a new sub-sequence or a collection of sub-sequences, which contain ends compatible with the cleavage sites thus created, is inserted.
Expression of Genes:
The term expression refers to in vivo or in vitro processes, by which the information of a gene is transcribed into mRNA and then translated into a protein/(poly)peptide. Thus, the term expression refers to a process which occurs inside cells, by which the information of a gene is transcribed into mRNA and then into a protein. The term expression also includes all events of post-translational modification and transport, which are necessary for the (poly)peptide to be functional.
Screening of Protein/(Poly)Peptide Libraries:
Any method which allows isolation of one or more proteins/(poly)peptides having a desired property from other proteins/(poly)peptides within a library.
Amino Acid Pattern Characteristic for a Species:
A (poly)peptide sequence is assumed to exhibit an amino acid pattern characteristic for a species if it is deduced from a collection of homologous proteins from just this species.
Immunoglobulin Superfamily (IgSF):
The IgSF is a family of proteins comprising domains being characterized by the immunoglobulin fold. The IgSF comprises for example T-cell receptors and the immunoglobulins (antibodies).
Antibody Framework:
A framework of an antibody variable domain is defined by Kabat et al. (1991) as the part of the variable domain which serves as a scaffold for the antigen binding loops of this variable domain.
Antibody CDR:
The CDRs (complementarity determining regions) of an antibody consist of the antigen binding loops, as defined by Kabat et al. (1991). Each of the two variable domains of an antibody Fv fragment contain three CDRs.
HuCAL:
Acronym for Human Combinatorial Antibody Library. Antibody Library based on modular consensus genes according to the invention (see Example 1).
Antibody Fragment:
Any portion of an antibody which has a particular function, e.g. binding of antigen. Usually, antibody fragments are smaller than whole antibodies. Examples are Fv, disulphide-linked Fv, single-chain Fv (scFv), or Fab fragments. Additionally, antibody fragments are often engineered to include new functions or properties.
Universal Framework:
One single framework which can be used to create the full variability of functions, specificities or properties which is originally sustained by a large collection of different frameworks, is called universal framework.
Binding of an Antibody to its Target:
The process which leads to a tight and specific association between an antibody and a corresponding molecule or ligand is called binding. A molecule or ligand or any part of a molecule or ligand which is recognized by an antibody is called the target.
Replacing Genetic Sub-Sequences
A method by which an existing sub-sequence is removed using the flanking cleavage sites of this sub-sequence, and a new sub-sequence or collection of sub-sequences, which contains ends compatible with tow cleavage sites thus create, is inserted.
Assembling of Genetic Sequences:
Any process which is used to combine synthetic or natural genetic sequences in a specific manner in order to get longer genetic sequences which contain at least parts of the used synthetic or natural genetic sequences.
Analysis of Homologous Genes:
The corresponding amino acid sequences of two or more genes are aligned to each other in a way which maximizes the correspondence between identical or similar amino acid residues at all positions. These aligned sequences are termed homologous if the percentage of the gum of identical and/or similar residues exceeds a defined threshold. This threshold is commonly regarded by those skilled in the art as being exceeded when at least 15 percent of the amino acids in the aligned genes are identical, and at least 30 percent are similar.



LEGENDS TO FIGURES AND TABLES
FIGS. 2A-2G: Alignment of consensus sequences designed for each subgroup (amino acid residues are shown with their standard one-letter abbreviation). (A) (2A-2B) (SEQ ID NOS 28-31, respectively) kappa sequences, (B) (2C-2D) (SEQ ID NOS 32-34, respectively) lambda sequences and (C) (2E-2G) (SEQ ID NOS 35-41, respectively), heavy chain sequences. The positions are numbered according to Kabat (1991). In order to maximize homology in the alignment, gaps (−) have been introduced in the sequence at certain positions.
FIGS. 3A-3K: Gene sequences (SEQ ID NOS 42, 44, 46 and 48, respectively) of the synthetic V kappa consensus genes. The corresponding amino acid sequences (SEQ ID NOS 43, 45, 47 and 49, respectively) (see FIGS. 2A-2B) as well as the unique cleavage sites are also shown.
FIGS. 4A-4I: Gene sequences (SEQ ID NOS 50, 52 and 54, respectively) of the synthetic V lambda consensus genes. The corresponding amino acid sequences (SEQ ID NOS 51, 53 and 55, respectively) (see FIGS. 2C-2D) as well as the unique cleavage sites are also shown.
FIGS. 5A-5U: Gene sequences (SEQ ID NOS 56, 58, 60, 62, 64, 66 and 68, respectively) of the synthetic V heavy chain consensus genes. The corresponding amino acid sequences (SEQ ID NOS 57, 59, 61, 63, 65, 67 and 69, respectively) (see FIGS. 2E-2G) as well as the unique cleavage sites are also shown.
FIGS. 6A-6G: Oligonucleotides (SEQ ID NOS 70-164, respectively) used for construction of the consensus genes. The oligos are named according to the corresponding consensus gene, e.g. the gene Vκ1 was constructed using the six oligonucleotides OIK1 to OIK6. The oligonucleotides used for synthesizing the genes encoding the constant domains Cκ (OCLK1 to 8) and CH1 (OCH1 to 8) are also shown.
FIGS. 7A-7D: Sequences of the synthetic genes (SEQ ID NOS 165 and 167, respectively) encoding the constant domains Cκ (A) (7A-7B) and CH1 (B) (7C-7D). The corresponding amino acid sequences (SEQ ID NOS 166 and 168, respectively) as well as unique cleavage sites introduced in these genes are also shown.
FIGS. 7E-7H: Functional map and sequence (SEQ ID NOS 169-170, respectively) of module M24 comprising the synthetic CX gene segment (huCL lambda).
FIGS. 7I-7J: Oligonucleotides (SEQ ID NOS 171-176) used for synthesis of module M24.
FIGS. 8A-8E: Sequence (SEQ ID NOS 177-178, respectively) and restriction map of the synthetic gene encoding the consensus single-chain fragment VH3-Vκa. The signal sequence (amino acids 1 to 21) was derived from the E. coli phoA gene (Skerra & Pluckthun, 1988). Between the phoA signal sequence and the VH3 domain, a short sequence stretch encoding 4 amino acid residues (amino acid 22 to 25) has been inserted in order to allow detection of the single-chain fragment in Western blot or ELISA using the monoclonal antibody M1 (Knappik & PlOckthun, 1994). The last 6 basepairs of the sequence were introduced for cloning purposes (EcoR1 site).
FIG. 9: Plasmid map of the vector pIG10.3 used for phage display of the H3K2 scFv fragment. The vector is derived from pIG10 and contains the gene for the lac operon repressor, lacl, the artificial operon encoding the H3K2-gene3ss fusion under control of the lac promoter, the lpp terminator of transcription, the single-strand replication origin of the E. coli phage f1 (F1_ORI), a gene encoding β-lactamase (bla) and the ColEI derived origin of replication.
FIGS. 10A-10B: Sequencing results of independent clones from the initial library, translated into the corresponding amino acid sequences. (A) (SEQ ID NO: 179) Amino acid sequence of the VH3 consensus heavy chain CDR3 (position 93 to 102, Kabat numbering). (B) (SEQ ID NOS 180-191, respectively) Amino acid sequences of 12 clones of the 10-mer library. (C) (SEQ ID NOS 192-202, respectively) Amino acid sequences of 11 clones of the 15-mer library, *: single base deletion.
FIGS. 11A-11B: Expression test of individual library members. (A) Expression of 9 independent clones of the 10-mer library. (B) Expression of 9 independent clones of the 15-mer library. The lane designated with M contains the size marker. Both the gp3-scFv fusion and the scFv monomer are indicated.
FIG. 12: Enrichment of specific phage antibodies during the panning against FITCBSA. The initial as well as the subsequent fluorescein-specific sub-libraries were panned against the blocking buffer and the ratio of the phage eluted from the FITC-BSA coated well vs. that from the powder milk coated well from each panning round is presented as the “specificity factor”.
FIG. 13: Phage ELISA of 24 independent clones after the third round of panning tested for binding on FITC-BSA.
FIG. 14: Competition ELISA of selected FITC-BSA binding clones. The ELISA signals (OD.sub.405 nm) of scFv binding without inhibition are taken as 100%.
FIG. 15: Sequences results of the heavy chain CDR3s of independent clones after 3 rounds of planning against FITC-BSA, translated into the corresponding amino acid sequences (SEQ ID NOS 203-218, respectively) (position 93 to 102. Kabat numbering).
FIG. 16: Coomassie-Blue stained SDS-PAGE of the purified anti-fluorescein scFv fragments: M: molecular weight marker, A: total soluble cell extract after induction, B: fraction of the flow-through, C, D and E: purified scFv fragments 1HA-3E4, 1HA-3E5 and 1HA-3E10, respectively.
FIG. 17: Enrichment of specific phage antibodies during the panning against β-estradiol-BSA, testosterone-BSA, BSA, ESL-1, interleukin-2, lymphotoxin-β, and LeY-BSA after three rounds of panning.
FIG. 18: ELISA of selected ESL-1 and .beta.-estradiol binding clones.
FIG. 19: Selectivity and cross-reactivity of HuCAL antibodies: in the diagonal specific binding of HuCAL antibodies can be seen, off-diagonal signals show non-specific cross-reactivity.
FIG. 20: Sequencing results of the heavy chain CDR3s of independent clones after 3 rounds of panning against p-estradiol-BSA, translated into the corresponding amino acid sequences (SEQ ID NOS 219-230 respectively) (position 93 to 102, Kabat numbering). One clone is derived from the 10mer library.
FIG. 21: Sequencing results of the heavy chain CDR3s of independent clones after 3 rounds of panning against testosterone-BSA, translated into the corresponding amino acid sequences (SEQ ID NOS 231-236, respectively) (position 93 to 102, Kabat numbering).
FIG. 22: Sequencing results of the heavy chain CDR3s of independent clones after 3 rounds of panning against lymphotoxin-p, translated into the corresponding amino acid sequences (SEQ ID NOS 237-244, respectively) (position 93 to 102, Kabat numbering). One clone comprises a 14mer CDR, presumably introduced by incomplete coupling of the trinucleotide mixture during oligonucleotide synthesis.
FIG. 23: Sequencing results of the heavy chain CDR3s of independent clones after 3 rounds of panning against ESL-1, translated into the corresponding amino acid sequences (SEQ ID NOS 245-256, respectively) (position 93 to 102, Kabat numbering). Two clones are derived from the 10mer library. One clone comprises a 16mer CDR, presumably introduced by chain elongation during oligonucleotide synthesis using trinucleotides.
FIG. 24: Sequencing results of the heavy chain CDR3s of independent clones after 3 rounds of panning against BSA, translated into the corresponding amino acid sequences (SEQ ID NOS 257-262, respectively) (position 93 to 102, Kabat numbering).
FIG. 25A: Schematic representation of the modular pCAL vector system.
FIGS. 25B-25C: List of restriction sites already used in or suitable for the modular HuCAL genes and pCAL vector system.
FIGS. 26A-26D: List of the modular vector elements for the pCAL vector series: shown are only those restriction sites which are part of the modular system.
FIGS. 27A-27B: Functional map and sequence (SEQ ID NO: 263) of the multi-cloning site module (MCS).
FIGS. 28A-28G: Functional map and sequence (SEQ ID NO: 264-265, respectively) of the pMCS cloning vector series.
FIGS. 29A-29B: Functional map and sequence (SEQ ID NO: 266) of the pCAL module M1 (see FIGS. 26A-26D).
FIGS. 30A-30C: Functional map and sequence (SEQ ID NOS 267-268, respectively) of the pCAL module M7-III (see FIGS. 26A-26D).
FIGS. 31A-31 B: Functional map and sequence (SEQ ID NO: 269) of the pCAL module M9-II (see FIGS. 26A-26D).
FIGS. 32A-32C: Functional map and sequence (SEQ ID NO: 270) of the pCAL module M11-II (see FIGS. 26A-26D).
FIGS. 33A-33D: Functional map and sequence (SEQ ID NO: 271) of the pCAL module M14-Ext2 (see FIGS. 26A-26D).
FIGS. 34A-34D: Functional map and sequence (SEQ ID NOS 272-273, respectively) of the pCAL module M17 (see FIGS. 26A-26D).
FIGS. 35A-35I: Functional map and sequence (SEQ ID NOS 274-276, respectively) module vector pCAL4.
FIGS. 35J-35XXX: Functional maps and sequences (SEQ ID NOS 277-300, respectively) of additional pCAL modules (M2, M3, M7I, M711, M8, M1011, M111I, M12, M13, M19, M20, M21, M41) and of low-copy number plasmid vectors (pCALO1 to pCALO3).
FIGS. 35YYY-35CCCC: List of oligonucleotides and primers (SEQ ID NOS 301-360, respectively) used for synthesis of pCAL vector modules.
FIGS. 36A-36F: Functional map and sequence (SEQ ID NOS 361-362, respectively) of the β-lactamase cassette for replacement of CDRs for CDR library cloning.
FIGS. 37A-37D: Oligo and primer (SEQ ID NOS 363-367, respectively) design for Vκ CDR3 libraries.
FIGS. 38A-38D: Oligo and primer (SEQ ID NOS 368-371, respectively) design for Vλ CDR3 libraries.
FIG. 39: Functional map of the pBS13 expression vector series.
FIGS. 40A-40B: Expression of all 49 HuCAL scFvs obtained by combining each of the 7 VH genes with each of the 7 VL genes (pBS 13, 30° C.): Values are given for the percentage of soluble vs. insoluble material, the total and the soluble amount compared to the combination H3P2, which was set to 100%. In addition, the corresponding values for the McPC603 scFv are given.



Table 1: Summary of human immunoglobulin germline sequences used for computing the germline membership of rearranged sequences. (A) kappa sequences, (B) lambda sequences and (C), heavy chain sequences. (1) The germline name used in the various calculations, (2) the references number for the corresponding sequence (see appendix for sequence related citations), (3) the family where each sequence belongs to and (4), the various names found in literature for germline genes with identical amino acid sequences
Table 2: Rearranged human sequences used for the calculation of consensus sequences. (A) kappa sequences, (B) lambda sequences and (C), heavy chain sequences. The table summarized the name of the sequence (1), the length of the sequence in amino acids (2), the germline family (3) as well as the computed germline counterpart (4). The number of amino acid exchanges between the rearranged sequence and the germline sequence is tabulated in (5), and the percentage of different amino acids is given in (6). Column (7) gives the references number for the corresponding sequence (see appendix for sequence related citations).
Table 3: Assignment of rearranged V sequences to their germline counterparts. (A) kappa sequences, (B) lambda sequences and (C), heavy chain sequences. The germline genes are tabulated according to their family (1), and the number of rearranged genes found for every germline gene is given in (2).
Table 4: Computation of the consensus sequence of the rearranged V kappa sequences. (A) (SEQ ID NO: 14), V kappa subgroup 1, (B) (SEQ ID NO: 15), V kappa subgroup 2, (C) (SEQ ID NO: 16), V kappa subgroup 3 and (D) (SEQ ID NO: 17), V kappa subgroup 4. The number of each amino acid found at each position is tabulated together with the statistical analysis data. (1) Amino acids are given with their standard one-letter abbreviations (and B means D or N, Z means E or Q and X means any amino acid). The statistical analysis summarizes the number of sequences found at each position (2), the number of occurrences of the most common amino acid (3), the amino acid residue which is most common at this position (4), the relative frequency of the occurrence of the most common amino acid (5) and the number of different amino acids found at each position (6).
Table 5: Computation of the consensus sequence of the rearranged V lambda sequences. (A) (SEQ ID NO: 18), V lambda subgroup 1, (B) (SEQ ID NO: 19), V lambda subgroup 2, and (C) (SEQ ID NO: 20), V lambda subgroup 3. The number of each amino acid found at each position is tabulated together with the statistical analysis of the data. Abbreviations are the same as in Table 4.
Table 6: Computation of the consensus sequence of the rearranged V heavy chain sequences. (A) (SEQ ID NO: 21), V heavy chain subgroup 1A, (B) (SEQ ID NO: 22), V heavy chain subgroup 1 B, (C) (SEQ ID NO: 23), V heavy chain subgroup 2, (D) (SEQ ID NO: 24), V heavy chain subgroup 3, (E) (SEQ ID NO: 25), V heavy chain subgroup 4, (F) (SEQ ID NO: 26), V heavy chain subgroup 5, and (G) (SEQ ID NO: 27), V heavy chain subgroup 6. The number of each amino acid found at each position is tabulated together with the statistical analysis of the data. Abbreviations are the same as in Table 4.
EXAMPLES
Example 1
Design of a Synthetic Human Combinatorial Antibody Library (HuCAL)
The following example describes the design of a fully synthetic human combinatorial antibody library (HuCAL), based on consensus sequences of the human immunoglobulin repertoire, and the synthesis of the consensus genes. The general procedure is outlined in FIG. 1.
1.1 Sequence Database
1.1.1 Collection and Alignment of Human Immunoglobulin Sequences
In a first step, sequences of variable domains of human immunoglobulins have been collected and divided into three sub bases: V heavy chain (VH), V kappa (Vκ) and V lambda (Vλ). For each sequence, the gene sequence was then translated into the corresponding amino acid sequence. Subsequently, all amino acid sequences were aligned according to Kabat et al. (1991). In the case of Vλ sequences, the numbering system of Chuchana et al. (1990) was used. Each of the three main databases was then divided into two further sub bases: the first sub base contained all sequences derived from rearranged V genes, where more than 70 positions of the sequence were known. The second sub base contained all germline gene segments (without the D- and J-minigenes; pseudogenes with internal stop codons were also removed). In all cases, where germline sequences with identical amino acid sequence but different names were found, only one sequence was used (see Table 1). The final databases of rearranged sequences contained 386, 149 and 674 entries for Vκ, Vλ and VH, respectively. The final databases of germline sequences contained 48, 20 and 141 entries for Vκ, Vλ and VH, respectively.
1.1.2 Assignment of Sequences to Subgroups
The sequences in the three germline databases where then grouped according to sequence homology (see also Tomlinson et al., 1992, Williams & Winter, 1993, and Cox et al., 1994). In the case of Vκ, 7 families could be established. Vλ was divided into 8 families and VH into 6 families. The VH germline genes of the VH7 family (Van Dijk et al., 1993) were grouped into the VH1 family, since the genes of the two families are highly homologous. Each family contained different numbers of germline genes, varying from 1 (for example VH6) to 47 (VH3).
1.2 Analysis of Sequences
1.2.1 Computation of Germline Membership
For each of the 1209 amino acid sequences in the databases of rearranged genes, the nearest germline counterpart, i.e. the germline sequence with the smallest number of amino acid differences was then calculated. After the germline counterpart was found, the number of somatic mutations which occurred in the rearranged gene and which led to amino acid exchanges could be tabulated. In 140 cases, the germline counterpart could not be calculated exactly, because more than one germline gene was found with an identical number of amino acid exchanges. These rearranged sequences were removed from the database. In a few cases, the number of amino acid exchanges was found to be unusually large (>20 for VL and >25 for VH), indicating either heavily mutated rearranged genes or derivation from germline genes not present in the database. Since it was not possible to distinguish between these two possibilities, these sequences were also removed from the database. Finally, 12 rearranged sequences were removed from the database because they were found to have very unusual CDR lengths and composition or unusual amino acids at canonical positions (see below). In summary, 1023 rearranged sequences out of 1209 (85%) could be clearly assigned to their germline counterparts (see Table 2).
After this calculation, every rearranged gene could be arranged in one of the families established for the germline genes. Now the usage of each germline gene, i.e. the number of rearranged genes which originate from each germline gene, could be calculated (see Table 2). It was found that the usage was strongly biased towards a subset of germline genes, whereas most of the germline genes were not present as rearranged genes in the database and therefore apparently not used in the immune system (Table 3). This observation had already been reported in the case of Vκ (Cox, et al., 1994). All germline gene families, where no or only very few rearranged counterparts could be assigned, were removed from the database, leaving 4 Vκ, 3 Vλ, and 6 VH families.
1.2.2 Analysis of CDR Conformations
The conformation of the antigen binding loops of antibody molecules, the CDRs, is strongly dependent on both the length of the CDRs and the amino acid residues located at the so-called canonical positions (Chothia & Lesk, 1987). It has been found that only a few canonical structures exist, which determine the structural repertoire of the immunoglobulin variable domains (Chothia et al., 1989). The canonical amino acid positions can be found in CDR as well as framework regions. The 13 used germline families defined above (7 VL and 6 VH) were now analyzed for their canonical structures in order to define the structural repertoire encoded in these families.
In 3 of the 4 Vκ families (Vκ1, 2 and 4), one different type of CDR1 conformation could be defined for every family. The family Vκ3 showed two types of CDR1 conformation: one type which was identical to Vκ1 and one type only found in Vκ3. All Vκ CDR2s used the same type of canonical structure. The CDR3 conformation is not encoded in the germline gene segments. Therefore, the 4 Vκ families defined by sequence homology and usage corresponded also to 4 types of canonical structures found in Vκ germline genes.
The 3 Vλ families defined above showed 3 types of CDR1 conformation, each family with one unique type. The Vλ1 family contained 2 different CDR1 lengths (13 and 14 amino acids), but identical canonical residues, and it is thought that both lengths adopt the same canonical conformation (Chothia & Lesk, 1987). In the CDR2 of the used Vλ germlines, only one canonical conformation exists, and the CDR3 conformation is not encoded in the germline gene segments. Therefore, the 3 Vλ families defined by sequence homology and usage corresponded also to 3 types of canonical structures.
The structural repertoire of the human VH sequences was analyzed in detail by Chothia et al., 1992. In total, 3 conformations of CDR1 (H1-1, H1-2 and H1-3) and 6 conformations of CDR2 (H2-1, H2-2, H2-3, H2-4, H2-5 and H2-x) could be defined. Since the CDR3 is encoded in the D- and J-minigene segments, no particular canonical residues are defined for this CDR.
All the members of the VH1 family defined above contained the CDR1 conformation H1-1, but differed in their CDR2 conformation: the H2-2 conformation was found in 6 germline genes, whereas the conformation H2-3 was found in 8 germline genes. Since the two types of CDR2 conformations are defined by different types of amino acid at the framework position 72, the VH1 family was divided into two subfamilies: VH1A with CDR2 conformation H2-2 and VH1B with the conformation H2-3. The members of the VH2 family all had the conformations H1-3 and H2-1 in CDR1 and CDR2, respectively. The CDR1 conformation of the VH3 members was found in all cases to be H1-1, but 4 different types were found in CDR2 (H2-1, H2-3, H2-4 and H2-x). In these CDR2 conformations, the canonical framework residue 71 is always defined by an arginine. Therefore, it was not necessary to divide the VH3 family into subfamilies, since the 4 types of CDR2 conformations were defined solely by the CDR2 itself. The same was true for the VH4 family. Here, all 3 types of CDR1 conformations were found, but since the CDR1 conformation was defined by the CDR itself (the canonical framework residue 26 was found to be glycine in all cases), no subdivisions were necessary. The CDR2 conformation of the VH4 members was found to be H2-1 in all cases. All members of the VH5 family were found to have the conformation H1-1 and H2-2, respectively. The single germline gene of the VH6 family had the conformations H1-3 and H2-5 in CDR1 and CDR2, respectively.
In summary, all possible CDR conformations of the Vκ and Vλ genes were present in the 7 families defined by sequence comparison. From the 12 different CDR conformations found in the used VH germline genes, 7 could be covered by dividing the family VH1 into two subfamilies, thereby creating 7 VH families. The remaining 5 CDR conformations (3 in the VH3 and 2 in the VH4 family) were defined by the CDRs themselves and could be created during the construction of CDR libraries. Therefore, the structural repertoire of the used human V genes could be covered by 49 (7×7) different frameworks.
1.2.3 Computation of Consensus Sequences
The 14 databases of rearranged sequences (4 Vκ, 3 Vλ and 7 VH) were used to compute the HuCAL consensus sequences of each subgroup (4 HuCAL-Vκ, 3 HuCAL-Vλ, 7 HuCAL-VH, see Table 4, 5 and 6). This was done by counting the number of amino acid residues used at each position (position variability) and subsequently identifying the amino acid residue most frequently used at each position. By using the rearranged sequences instead of the used germline sequences for the calculation of the consensus, the consensus was weighted according to the frequency of usage. Additionally, frequently mutated and highly conserved positions could be identified. The consensus sequences were cross-checked with the consensus of the germline families to see whether the rearranged sequences were biased at certain positions towards amino acid residues which do not occur in the collected germline sequences, but this was found not to be the case. Subsequently, the number of differences of each of the 14 consensus sequences to each of the germline sequences found in each specific family was calculated. The overall deviation from the most homologous germline sequence was found to be 2.4 amino acid residues (s.d.=2.7), ensuring that the “artificial” consensus sequences can still be considered as truly human sequences as far as immunogenicity is concerned.
1.3 Structural Analysis
So far, only sequence information was used to design the consensus sequences. Since it was possible that during the calculation certain artificial combinations of amino acid residues have been created, which are located far away in the sequence but have contacts to each other in the three dimensional structure, leading to destabilized or even misfolded frameworks, the 14 consensus sequences were analyzed according to their structural properties.
It was rationalized that all rearranged sequences present in the database correspond to functional and therefore correctly folded antibody molecules. Hence, the most homologous rearranged sequence was calculated for each consensus sequence. The positions where the consensus differed from the rearranged sequence were identified as potential “artificial residues” and inspected.
The inspection itself was done in two directions. First, the local sequence stretch around each potentially “artificial residue” was compared with the corresponding stretch of all the rearranged sequences. If this stretch was found to be truly artificial, i.e. never occurred in any of the rearranged sequences, the critical residue was converted into the second most common amino acid found at this position and analyzed again. Second, the potentially “artificial residues” were analyzed for their long range interactions. This was done by collecting all available structures of human antibody variable domains from the corresponding PDB files and calculating for every structure the number and type of interactions each amino acid residue established to each side-chain. These “interaction maps” were used to analyze the probable side-chain/side-chain interactions of the potentially “artificial residues”. As a result of this analysis, the following residues were exchanged (given is the name of the gene, the position according to Kabat's numbering scheme, the amino acid found at this position as the most abundant one and the amino acid which was used instead):
VH2: S65T
Vκ1: N34A,
Vκ3: G9A, D60A, R77S
Vλ3: V78T
1.4 Design of CDR Sequences
The process described above provided the complete consensus sequences derived solely from the databases of rearranged sequences. It was rationalized that the CDR1 and CDR2 regions should be taken from the databases of used germline sequences, since the CDRs of rearranged and mutated sequences are biased towards their particular antigens. Moreover, the germline CDR sequences are known to allow binding to a variety of antigens in the primary immune response, where only CDR3 is varied. Therefore, the consensus CDRs obtained from the calculations described above were replaced by germline CDRs in the case of VH and Vκ. In the case of Vλ, a few amino acid exchanges were introduced in some of the chosen germline CDRs in order to avoid possible protease cleavage sites as well as possible structural constraints.
The CDRs of following germline genes have been chosen:












HuCAL gene
CDR1
CDR2







HuCAL-VH1A
VH1-12-1
VH1-12-1


HuCAL-VH1B
VH1-13-16
VH1-13-6, -7, -8, -9


HuCAL-VH2
VH2-31-10, -11, -12, -13
VH2-31-3, -4


HuCAL-VH3
VH3-13-8, -9, -10
VH3-13-8, -9, -10


HuCAL-VH4
VH4-11-7 to -14
VH4-11-8, -9, -11, -12,




-14, -16




VH4-31-17, -18, -19, -20


HuCAL-VH5
VH5-12-1, -2
VH5-12-1, -2


HuCAL-VH6
VH6-35-1
VH6-35-1


HuCAL-Vκ1
Vκ1-14, -15
Vκ1-2, -3, -4,




-5, -7, -8, -12, -13, -18, -19


HuCAL-Vκ2
Vκ2-6
Vκ2-6


HuCAL-Vκ3
Vκ3-1, -4
Vκ3-4


HuCAL-Vκ4
Vκ4-1
Vκ4-1


HuCAL-Vλ1
HUMLV117, DPL5
DPL5


HuCAL-Vλ2
DPL11, DPL12
DPL12


HuCAL-Vλ3
DPL23
HUMLV318









In the case of the CDR3s, any sequence could be chosen since these CDRs were planned to be the first to be replaced by oligonucleotide libraries. In order to study the expression and folding behavior of the consensus sequences in E. coli, it would be useful to have all sequences with the same CDR3, since the influence of the CDR3s on the folding behavior would then be identical in all cases. The dummy sequences QQHYTTPP (see, for instance, positions 89-96 of SEQ ID NO: 28 and positions 88-95 of SEQ ID NO: 34) and ARWGGDGFYAMDY (positions 97-109 of SEQ ID NOS 35 & 36) were selected for the VL chains (kappa and lambda) and for the VH chains, respectively. These sequences are known to be compatible with antibody folding in E. coli (Carter et al., 1992).
1.5 Gene Design
The final outcome of the process described above was a collection of 14 HuCAL amino acid sequences, which represent the frequently used structural antibody repertoire of the human immune system (see FIG. 2). These sequences were back-translated into DNA sequences. In a first step, the back-translation was done using only codons which are known to be frequently used in E. coli. These gene sequences were then used for creating a database of all possible restriction endonuclease sites, which could be introduced without changing the corresponding amino acid sequences. Using this database, cleavage sites were selected which were located at the flanking regions of all sub-elements of the genes (CDRs and framework regions) and which could be introduced in all HuCAL VH, Vκ or Vλ genes simultaneously at the same position. In a few cases it was not possible to find cleavage sites for all genes of a subgroup. When this happened, the amino acid sequence was changed, if this was possible according to the available sequence and structural information. This exchange was then analyzed again as described above. In total, the following 6 amino acid residues were exchanged during this design (given is the name of the gene, the position according to Kabat's numbering scheme, the amino acid found at this position as the most abundant one and the amino acid which was used instead):
VH2: T3Q
VH6: S47G
Vκ3: E1D, I58V
Vκ4: K24R
Vλ3: T22S
In one case (5′-end of VH framework 3) it was not possible to identify a single cleavage site for all 7 VH genes. Two different type of cleavage sites were used instead: BstEII for HuCAL VH1A, VH1B, VH4 and VH5, and NspV for HuCAL VH2, VH3, VH4 and VH6.
Several restriction endonuclease sites were identified, which were not located at the flanking regions of the sub-elements but which could be introduced in every gene of a given group without changing the amino acid sequence. These cleavage sites were also introduced in order to make the system more flexible for further improvements. Finally, all but one remaining restriction endonuclease sites were removed in every gene sequence. The single cleavage site, which was not removed was different in all genes of a subgroup and could be therefore used as a “fingerprint” site to ease the identification of the different genes by restriction digest. The designed genes, together with the corresponding amino acid sequences and the group-specific restriction endonuclease sites are shown in FIGS. 3, 4 and 5, respectively.
1.6 Gene Synthesis and Cloning
The consensus genes were synthesized using the method described by Prodromou & Pearl, 1992, using the oligonucleotides shown in FIG. 6. Gene segments encoding the human constant domains Cκ, Cλ and CH1 were also synthesized, based on sequence information given by Kabat et al., 1991 (see FIG. 6 and FIG. 7). Since for both the CDR3 and the framework 4 gene segments identical sequences were chosen in all HuCAL Vκ, Vλ and VH genes, respectively, this part was constructed only once, together with the corresponding gene segments encoding the constant domains. The PCR products were cloned into pCR-Script KS(+) (Stratagene, Inc.) or pZErO-1 (Invitrogen, Inc.) and verified by sequencing.
Example 2
Cloning and Testing of a HuCAL-Based Antibody Library
A combination of two of the synthetic consensus genes was chosen after construction to test whether binding antibody fragments can be isolated from a library based on these two consensus frameworks. The two genes were cloned as a single-chain Fv (scFv) fragment, and a VH-CDR3 library was inserted. In order to test the library for the presence of functional antibody molecules, a selection procedure was carried out using the small hapten fluorescein bound to BSA (FITC-BSA) as antigen.
2.1 Cloning of the HuCAL VH3-Vk2 scFv Fragment
In order to test the design of the consensus genes, one randomly chosen combination of synthetic light and heavy gene (HuCAL-Vx2 and HuCAL-VH3) was used for the construction of a single-chain antibody (scFv) fragment. Briefly, the gene segments encoding the VH3 consensus gene and the CH1 gene segment including the CDR3-framework 4 region, as well as the VK2 consensus gene and the CK gene segment including the CDR3-framework 4 region were assembled yielding the gene for the VH3-CH1 Fd fragment and the gene encoding the VK2-Cκ light chain, respectively. The CH1 gene segment was then replaced by an oligonucleotide (SEQ ID NOS 2 & 3, respectively) cassette encoding a 20-mer peptide linker (SEQ ID NO: 1) with the sequence AGGGSGGGGSGGGGSGGGGS. The two oligonucleotides encoding this linker were 5′-TCAGCGGGTGGCGGTTCTGGCGGCGGTGGGAGCGGTG GCGGTGGTTCTGGCGGTGGTGGTTCCGATATCGGTCCACGTACGG-3′ and 5′-AATTCCGTACGTGGACCGATATCGGAACCACCACCGCCAGA ACCACCGCCACCGCTCCCACCGCCGCCAGAACCGCCACCCGC-3′, respectively. Finally, the HuCAL-Vκ2 gene was inserted via EcoRV and BsiWI into the plasmid encoding the HuCAL-VH3-linker fusion, leading to the final gene HuCAL-VH3-Vx2, which encoded the two consensus sequences in the single-chain format VH-linker-VL. The complete coding sequence is shown in FIG. 8.
2.2 Construction of a Monovalent Phage-Display Phagemid Vector pIG10.3
Phagemid pIG10.3 (FIG. 9) was constructed in order to create a phage-display system (Winter et al., 1994) for the H3κ2 scFv gene. Briefly, the EcoRI/HindIII restriction fragment in the phagemid vector pIG10 (Ge et al., 1995) was replaced by the c-myc followed by an amber codon (which encodes an glutamate in the amber-suppresser strain XL1 Blue and a stop codon in the non-suppresser strain JM83) and a truncated version of the gene III (fusion junction at codon 249, see Lowman et al., 1991) through PCR mutagenesis.
2.3 Construction of H-CDR3 Libraries
Heavy chain CDR3 libraries of two lengths (10 and 15 amino acids) were constructed using trinucleotide codon containing oligonucleotides (Virnekäs et al., 1994) as templates and the oligonucleotides complementing the flanking regions as primers. To concentrate only on the CDR3 structures that appear most often in functional antibodies, we kept the salt-bridge of RH94 and DH101 in the CDR3 loop. For the 15-mer library, both phenylalanine and methionine were introduced at position 100 since these two residues were found to occur quite often in human CDR3s of this length (not shown). For the same reason, valine and tyrosine were introduced at position 102. All other randomized positions contained codons for all amino acids except cystein, which was not used in the trinucleotide mixture.
The CDR3 libraries of lengths 10 and 15 were generated from the PCR fragments using oligonucleotide templates (SEQ ID NOS 4 & 5, respectively) 03HCDR103T (5′-GATACGGCCGTGTATTATTGCGCGCGT (TRI)6 GATTATTGGGGCCAAGGCACCCTG-3′) and O3HCDR153T GATACGGCCGTGTATTATTGCGCGCGT(TRI)10 (TTT/ATG)GAT(GTT/TAT)TGGGGCCAAGGCACCCTG-3′), and primers (SEQ ID NOS 6 & 7, respectively) O3HCDR35 (5′-GATACGGCCGTGTATTATTGC-3′ and O3HCDR33 (5′-CAGGGTGCCTTGGCCCC-3′), where TRI are trinucleotide mixtures representing all amino acids without cystein, (TTT/ATG) and (GTT/TAT) are trinucleotide mixtures encoding the amino acids phenylalanine/methionine and valine/tyrosine, respectively. The potential diversity of these libraries was 4.7×107 and 3.4×1010 for 10-mer and 15-mer library, respectively. The library cassettes were first synthesized from PCR amplification of the oligo templates in the presence of both primers: 25 pmol of the oligo template 03HCDR103T or 03HCDR153T, 50 pmol each of the primers O3HCDR35 and O3HCDR33, 20 nmol of dNTP, 10× buffer and 2.5 units of Pfu DNA polymerase (Stratagene) in a total volume of 100 ml for 30 cycles (1 minute at 92° C., 1 minute at 62° C. and 1 minute at 72° C.). A hot-start procedure was used. The resulting mixtures were phenol-extracted, ethanol-precipitated and digested overnight with Eagl and Styl. The vector pIG10.3-sCH3κ2cat, where the Eagl-Styl fragment in the vector pIG10.3-sCH3κ2 encoding the H-CDR3 was replaced by the chloramphenicol acetyltransferase gene (cat) flanked with these two sites, was similarly digested. The digested vector (35 μg) was gel-purified and ligated with 100 μg of the library cassette overnight at 16° C. The ligation mixtures were isopropanol precipitated, air-dried and the pellets were redissolved in 100 ml of ddH2O. The ligation was mixed with 1 ml of freshly prepared electrocompetent XL1 Blue on ice. 20 rounds of electroporation were performed and the transformants were diluted in SOC medium, shaken at 37° C. for 30 minutes and plated out on large LB plates (Amp/Tet/Glucose) at 37° C. for 6-9 hrs. The number of transformants (library size) was 3.2×107 and 2.3×107 for the 10-mer and the 15-mer library, respectively. The colonies were suspended in 2×YT medium (Amp/Tet/Glucose) and stored as glycerol culture. In order to test the quality of the initial library, phagemids from 24 independent colonies (12 from the 10-mer and 12 from the 15-mer library, respectively) were isolated and analyzed by restriction digestion and sequencing. The restriction analysis of the 24 phagemids indicated the presence of intact vector in all cases. Sequence analysis of these clones (see FIG. 10) indicated that 22 out of 24 contained a functional sequence in their heavy chain CDR3 regions. 1 out of 12 clones of the 10-mer library had a CDR3 of length 9 instead of 10, and 2 out of 12 clones of the 15-mer library had no open reading frame, thereby leading to a non-functional scFv; one of these two clones contained two consecutive inserts, but out of frame (data not shown). All codons introduced were presented in an even distribution.
Expression levels of individual library members were also measured. Briefly, 9 clones from each library were grown in 2×YT medium containing Amp/Tet/0.5% glucose at 37° C. overnight. Next day, the cultures were diluted into fresh medium with Amp/Tet. At an OD600nm of 0.4, the cultures were induced with 1 mM of IPTG and shaken at RT overnight. Then the cell pellets were suspended in 1 ml of PBS buffer+1 mM of EDTA. The suspensions were sonicated and the supernatants were separated on an SDS-PAGE under reducing conditions, blotted on nylon membrane and detected with anti-FLAG M1 antibody (see FIG. 11). From the nine clones of the 10-mer library, all express the scFv fragments. Moreover, the gene III/scFv fusion proteins were present in all cases. Among the nine clones from the 15-mer library analyzed, 6/9 (67%) led to the expression of both scFv and the gene III/scFv fusion proteins. More importantly, all clones expressing the scFvs and gene III/scFv fusions gave rise to about the same level of expression.
2.4 Biopanning
Phages displaying the antibody libraries were prepared using standard protocols. Phages derived from the 10-mer library were mixed with phages from the 15-mer library in a ratio of 20:1 (1×1010 cfu/well of the 10-mer and 5×108 cfu/well of the 15-mer phages, respectively). Subsequently, the phage solution was used for panning in ELISA plates (Maxisorp, Nunc) coated with FITC-BSA (Sigma) at concentration of 100 μg/ml in PBS at 4° C. overnight. The antigen-coated wells were blocked with 3% powder milk in PBS and the phage solutions in 1% powder milk were added to each well and the plate was shaken at RT for 1 hr. The wells were then washed with PBST and PBS (4 times each with shaking at RT for 5 minutes). The bound phages were eluted with 0.1 M triethylamine (TEA) at RT for 10 minutes. The eluted phage solutions were immediately neutralized with 1⁄2 the volume of 1 M Tris-Cl, pH 7.6. Eluted phage solutions (ca. 450 μl) were used to infect 5 ml of XL1 Blue cells at 37° C. for 30 min. The infected cultures were then plated out on large LB plates (Amp/Tet/Glucose) and allowed to grow at 37° C. until the colonies were visible. The colonies were suspended in 2×YT medium and the glycerol cultures were made as above described. This panning round was repeated twice, and in the third round elution was carried out with addition of fluorescein in a concentration of 100 μg/ml in PBS. The enrichment of specific phage antibodies was monitored by panning the initial as well as the subsequent fluorescein-specific sub-libraries against the blocking buffer (FIG. 12). Antibodies with specificity against fluorescein were isolated after 3 rounds of panning.
2.5 ELISA Measurements
One of the criteria for the successful biopanning is the isolation of individual phage clones that bind to the targeted antigen or hapten. We undertook the isolation of anti-FITC phage antibody clones and characterized them first in a phage ELISA format. After the 3rd round of biopanning (see above), 24 phagemid containing clones were used to inoculate 100 μl of 2×YT medium (Amp/Tet/Glucose) in an ELISA plate (Nunc), which was subsequently shaken at 37° C. for 5 hrs. 100 μl of 2×YT medium (Amp/Tet/1 mM IPTG) were added and shaking was continued for 30 minutes. A further 100 μl of 2×YT medium (Amp/Tet) containing the helper phage (1×109 cfu/well) was added and shaking was done at RT for 3 hrs. After addition of kanamycin to select for successful helper phage infection, the shaking was continued overnight. The plates were then centrifuged and the supernatants were pipetted directly into ELISA wells coated with 100 μl FITC-BSA (100 μg/ml) and blocked with milk powder. Washing was performed similarly as during the panning procedure and the bound phages were detected with anti-M13 antibody-POD conjugate (Pharmacia) using soluble POD substrate (Boehringer-Mannheim). Of the 24 clones screened against FITC-BSA, 22 were active in the ELISA (FIG. 13). The initial libraries of similar titer gave rise to no detectable signal.
Specificity for fluorescein was measured in a competitive ELISA. Periplasmic fractions of five FITC specific scFvs were prepared as described above. Western blotting indicated that all clones expressed about the same amount of scFv fragment (data not shown). ELISA was performed as described above, but additionally, the periplasmic fractions were incubated 30 min at RT either with buffer (no inhibition), with 10 mg/ml BSA (inhibition with BSA) or with 10 mg/ml fluorescein (inhibition with fluorescein) before adding to the well. Binding scFv fragment was detected using the anti-FLAG antibody M1. The ELISA signal could only be inhibited, when soluble fluorescein was added, indicating binding of the scFvs was specific for fluorescein (FIG. 14).
2.6 Sequence Analysis
The heavy chain CDR3 region of 20 clones were sequenced in order to estimate the sequence diversity of fluorescein binding antibodies in the library (FIG. 15). In total, 16 of 20 sequences (80%) were different, showing that the constructed library contained a highly diverse repertoire of fluorescein binders. The CDR3s showed no particular sequence homology, but contained on average 4 arginine residues. This bias towards arginine in fluorescein binding antibodies had already been described by Barbas et al., 1992.
2.7 Production
E. coli JM83 was transformed with phagemid DNA of 3 selected clones and cultured in 0.5 L 2×YT medium. Induction was carried out with 1 mM IPTG at OD600nm=0.4 and growth was continued with vigorous shaking at RT overnight. The cells were harvested and pellets were suspended in PBS buffer and sonicated. The supernatants were separated from the cell debris via centrifugation and purified via the BioLogic system (Bio-Rad) by with a POROS®MC 20 column (IMAC, PerSeptive Biosystems, Inc.) coupled with an ion-exchange chromatography column. The ion-exchange column was one of the POROS®HS, CM or HQ or PI 20 (PerSeptive Biosystems, Inc.) depended on the theoretical pI of the scFv being purified. The pH of all the buffers was adjusted to one unit lower or higher than the pI of the scFv being purified throughout. The sample was loaded onto the first IMAC column, washed with 7 column volumes of 20 mM sodium phosphate, 1 M NaCl and 10 mM imidazole. This washing was followed by 7 column volumes of 20 mM sodium phosphate and 10 mM imidazole. Then 3 column volumes of an imidazole gradient (10 to 250 mM) were applied and the eluent was connected directly to the ion-exchanger. Nine column volumes of isocratic washing with 250 mM imidazole was followed by 15 column volumes of 250 mM to 100 mM and 7 column volumes of an imidazole/NaCl gradient (100 to 10 mM imidazole, 0 to 1 M NaCl). The flow rate was 5 ml/min. The purity of scFv fragments was checked by SDS-PAGE Coomassie staining (FIG. 16). The concentration of the fragments was determined from the absorbance at 280 nm using the theoretically determined extinction coefficient (Gill & von Hippel, 1989). The scFv fragments could be purified to homogeneity (see FIG. 16). The yield of purified fragments ranged from 5 to 10 mg/L/OD.
Example 3
HuCAL H3κ2 Library Against a Collection of Antigens
In order to test the library used in Example 2 further, a new selection procedure was carried out using a variety of antigens comprising β-estradiol, testosterone, Lewis-Y epitope (LeY), interleukin-2 (IL-2), lymphotoxin-β (LT-β), E-selectin ligand-1 (ESL-1), and BSA.
3.1 Biopanning
The library and all procedures were identical to those described in Example 2. The ELISA plates were coated with β-estradiol-BSA (100 μg/ml), testosterone-BSA (100 μg/ml), LeY-BSA (20 μg/ml) IL-2 (20 μg/ml), ESL-1 (20 μg/ml) and BSA (100 μg/ml), LT-β (denatured protein, 20 μg/ml). In the first two rounds, bound phages were eluted with 0.1 M triethylamine (TEA) at RT for 10 minutes. In the case of BSA, elution after three rounds of panning was carried out with addition of BSA in a concentration of 100 μg/ml in PBS. In the case of the other antigens, third round elution was done with 0.1 M triethylamine. In all cases except LeY, enrichment of binding phages could be seen (FIG. 17). Moreover, a repetition of the biopanning experiment using only the 15-mer library resulted in the enrichment of LeY-binding phages as well (data not shown).
3.2. ELISA Measurements
Clones binding to β-estradiol, testosterone, LeY, LT-β, ESL-1 and BSA were further analyzed and characterized as described in Example 2 for FITC. ELISA data for anti-β-estradiol and anti-ESL-1 antibodies are shown in FIG. 18. In one experiment. selectivity and cross-reactivity of binding scFv fragments were tested. For this purpose, an ELISA plate was coated with FITC, testosterone, β-estradiol, BSA, and ESL-1, with 5 wells for each antigen arranged in 5 rows, and 5 antibodies, one against each of the antigens, were screened against each of the antigens. FIG. 19 shows the specific binding of the antibodies to the antigen it was selected for, and the low cross-reactivity with the other four antigens.
3.3 Sequence Analysis
The sequencing data of several clones against β-estradiol (34 clones), testosterone (12 clones), LT-β (23 clones), ESL-1 (34 clones), and BSA (10 clones) are given in FIGS. 20 to 24.
Example 4
Vector Construction
To be able to take advantage of the modularity of the consensus gene repertoire, a vector system had to be constructed which could be used in phage display screening of HuCAL libraries and subsequent optimization procedures. Therefore, all necessary vector elements such as origins of single-stranded or double-stranded replication, promotor/operator, repressor or terminator elements, resistance genes, potential recombination sites, gene III for display on filamentous phages, signal sequences, or detection tags had to be made compatible with the restriction site pattern of the modular consensus genes. FIG. 25 shows a schematic representation of the pCAL vector system and the arrangement of vector modules and restriction sites therein. FIG. 25a shows a list of all restriction sites which are already incorporated into the consensus genes or the vector elements as part of the modular system or which are not yet present in the whole system. The latter could be used in a later stage for the introduction of or within new modules.
4.1 Vector Modules
A series of vector modules was constructed where the restriction sites flanking the gene sub-elements of the HuCAL genes were removed, the vector modules themselves being flanked by unique restriction sites. These modules were constructed either by gene synthesis or by mutagenesis of templates. Mutagenesis was done by add-on PCR, by site-directed mutagenesis (Kunkel et al., 1991) or multisite oligonucleotide-mediated mutagenesis (Sutherland et al., 1995; Perlak, 1990) using a PCR-based assembly method.
FIG. 26 contains a list of the modules constructed. Instead of the terminator module M9 (HindIII-Ipp-PacI), a larger cassette M9II was prepared to introduce FseI as additional restriction site. M9II can be cloned via HindIII/BsrGI.
All vector modules were characterized by restriction analysis and sequencing. In the case of module M11-II, sequencing of the module revealed a two-base difference in positions 164/65 compared to the sequence database of the template. These two different bases (CA→GC) created an additional BanII site. Since the same two-base difference occurs in the 11 origin of other bacteriophages, it can be assumed that the two-base difference was present in the template and not created by mutagenesis during cloning. This BanII site was removed by site-directed mutagenesis, leading to module M11-III. The BssSI site of module M14 could initially not be removed without impact on the function of the CoIE1 origin, therefore M14-Ext2 was used for cloning of the first pCAL vector series. FIGS. 29 to 34 are showing the functional maps and sequences of the modules used for assembly of the modular vector pCAL4 (see below). The functional maps and sequences of additional modules can be found in FIG. 35a. FIG. 35b contains a list of oligonucleotides and primers used for the synthesis of the modules.
4.2 Cloning Vector pMCS
To be able to assemble the individual vector modules, a cloning vector pMCS containing a specific multi-cloning site (MCS) was constructed. First, an MCS cassette (FIG. 27) was made by gene synthesis. This cassette contains all those restriction sites in the order necessary for the sequential introduction of all vector modules and can be cloned via the 5′-HindIII site and a four base overhang at the 3′-end compatible with an AatII site. The vector pMCS (FIG. 28) was constructed by digesting pUC19 with AatII and HindIII, isolating the 2174 base pair fragment containing the bla gene and the CoIE1 origin, and ligating the MCS cassette.
4.3 Cloning of Modular Vector pCAL4
This was cloned step by step by restriction digest of pMCS and subsequent ligation of the modules M1 (via AatII/XbaI), M7III (via EcoRI/HindIII), and M9II (via HindIII/BsrGI), and M11-II (via BsrGI/NheI). Finally, the bla gene was replaced by the cat gene module M17 (via AatII/BgIII), and the wild type CoIE1 origin by module M14-Ext2 (via BgIII/NheI). FIG. 35 is showing the functional map and the sequence of pCAL4.
4.4 Cloning of Low-Copy Number Plasmid Vectors pCALO
A series of low-copy number plasmid vectors was constructed in a similar way using the p15A module M12 instead of the CoIE1 module M14-Ext2. FIG. 35a is showing the functional maps and sequences of the vectors pCALO1 to pCALO3.
Example 5
Construction of a HuCAL scFv Library
5.1. Cloning of all 49 HuCAL scFv Fragments
All 49 combinations of the 7 HuCAL-VH and 7 HuCAL-VL consensus genes were assembled as described for the HuCAL VH3-VK2 scFv in Example 2 and inserted into the vector pBS12, a modified version of the pLisc series of antibody expression vectors (Skerra et al., 1991).
5.2 Construction of a CDR Cloning Cassette
For replacement of CDRs, a universal β-lactamase cloning cassette was constructed having a multi-cloning site at the 5′-end as well as at the 3′-end. The 5′-multi-cloning site comprises all restriction sites adjacent to the 5′-end of the HuCAL VH and VL CDRs, the 3′-multi-cloning site comprises all restriction sites adjacent to the 3′ end of the HuCAL VH and VL CDRs. Both 5′- and 38′-multi-cloning site were prepared as cassettes via add-on PCR using synthetic oligonucleotides as 5′- and 3′-primers using wild type β-lactamase gene as template. FIG. 36 shows the functional map and the sequence of the cassette bla-MCS.
5.3. Preparation of VL-CDR3 Library Cassettes
The VL-CDR3 libraries comprising 7 random positions were generated from the PCR fragments using oligonucleotide templates Vκ1&Vκ3, Vκ2 and Vκ4 and primers O_K3L—5 and O_K3L—3 (FIG. 37) for the Vκ genes, and Vλ and primers O_L3L—5 (5′-GCAGAAGGCGAACGTCC-3′) and O_L3LA—3 (FIG. 38) for the Vλ genes. Construction of the cassettes was performed as described in Example 2.3.
5.4 Cloning of HuCAL scFv Genes with VL-CDR3 Libraries
Each of the 49 single-chains was subcloned into pCAL4 via XbaI/EcoRI and the VL-CDR3 replaced by the β-lactamase cloning cassette via BbsI/MscI, which was then replaced by the corresponding VL-CDR3 library cassette synthesized as described above. This CDR replacement is described in detail in Example 2.3 where the cat gene was used.
5.5 Preparation of VH-CDR3 Library Cassette
The VH-CDR3 libraries were designed and synthesized as described in Example 2.3.
5.6 Cloning of HuCAL scFv Genes with VL- and VH-CDR3 Libraries
Each of the 49 single-chain VL-CDR3 libraries was digested with BssHII/StyI to replace VH-CDR3. The “dummy” cassette digested with BssHII/StyI was inserted, and was then replaced by a corresponding VH-CDR3 library cassette synthesized as described above.
Example 6
Expression Tests
Expression and toxicity studies were performed using the scFv format VH-linker-VL. All 49 combinations of the 7 HuCAL-VH and 7 HuCAL-VL consensus genes assembled as described in Example 5 were inserted into the vector pBS13, a modified version of the pLisc series of antibody expression vectors (Skerra et al., 1991). A map of this vector is shown in FIG. 39.
E. coli JM83 was transformed 49 times with each of the vectors and stored as glycerol stock. Between 4 and 6 clones were tested simultaneously, always including the clone H3κ2, which was used as internal control throughout. As additional control, the McPC603 scFv fragment (Knappik & Plückthun, 1995) in pBS13 was expressed under identical conditions. Two days before the expression test was performed, the clones were cultivated on LB plates containing 30 μg/ml chloramphenicol and 60 mM glucose. Using this plates an 3 ml culture (LB medium containing 90 μg chloramphenicol and 60 mM glucose) was inoculated overnight at 37° C. Next day the overnight culture was used to inoculate 30 ml LB medium containing chloramphenicol (30 μg/ml). The starting OD600nm was adjusted to 0.2 and a growth temperature of 30° C. was used. The physiology of the cells was monitored by measuring every 30 minutes for 8 to 9 hours the optical density at 600 nm. After the culture reached an OD600nm of 0.5, antibody expression was induced by adding IPTG to a final concentration of 1 mM. A 5 ml aliquot of the culture was removed after 2 h of induction in order to analyze the antibody expression. The cells were lysed and the soluble and insoluble fractions of the crude extract were separated as described in Knappik & Plückthun, 1995. The fractions were assayed by reducing SDS-PAGE with the samples normalized to identical optical densities. After blotting and immunostaining using the α-FLAG antibody M1 as the first antibody (see Ge et al., 1994) and an Fc-specific anti-mouse antiserum conjugated to alkaline phosphatase as the second antibody, the lanes were scanned and the intensities of the bands of the expected size (appr. 30 kDa) were quantified densitometrically and tabulated relative to the control antibody (see FIG. 40).
Example 7
Optimization of Fluorescein Binders
7.1. Construction of L-CDR3 and H-CDR2 Library Cassettes
A L-CDR3 library cassette was prepared from the oligonucleotide (SEQ ID NO: 9) template CDR3L (5′-TGGAAGCTGAAGACGTGGGCGTGTATTATT GCCAGCAG(TR5)(TRI)4CCG(TRI)TTTGGCCAGGGTACGAAAGTT-3′) and primer (SEQ ID NO: 10) 5′-AATTTCGTACCCTGGCC-3′ for synthesis of the complementary strand, where (TRI) was a trinucleotide mixture representing all amino acids except Cys, (TR5) comprised a trinucleotide mixture representing the 5 codons for Ala, Arg, His, Ser, and Tyr.
A H-CDR2 library cassette was prepared from the oligonucleotide template CDRsH (SEQ ID NOS 11 & 12, respectively) (5′-AGGGTCTCG AGIGGGTGAGC(TROATT(TRI)2-3(6)2(TRI)ACC(TRI)TATGCG GATAGCGTGAAAGGCCGTTTTACCATTTCACGTGATAATTCG AAAAA CACCA-3′), and primer (SEQ ID NO: 13) 5′-TGGTGTTTTTCGAATTATCA-3′ for synthesis of the complementary strand, where (TRI) was a trinucleotide mixture representing all amino acids except Cys, (6) comprised the incorporation of (A/G)(A/C/G) T, resulting in the formation of 6 codons for Ala, Asn, Asp, Gly, Ser, and Thr, and the length distribution being obtained by performing one substoichiometric coupling of the (TRI) mixture during synthesis, omitting the capping step normally used in DNA synthesis.
DNA synthesis was performed on a 40 nmole scale, oligos were dissolved in TE buffer, purified via gel filtration using spin columns (S-200), and the DNA concentration determined by OD measurement at 260 nm (OD 1.0=40 μg/ml).
10 nmole of the oligonucleotide templates and 12 nmole of the corresponding primers were mixed and annealed at 80° C. for 1 min, and slowly cooled down to 37° C. within 20 to 30 min. The fill-in reaction was performed for 2 h at 37° C. using Klenow polymerase (2.0 μl) and 250 nmole of each dNTP. The excess of dNTPs was removed by gel filtration using Nick-Spin columns (Pharmacia), and the double-stranded DNA digested with BbsI/MscI (L-CDR3), or XhoI/SfuI (H-CDR2) over night at 37° C. The cassettes were purified via Nick-Spin columns (Pharmacia), the concentration determined by OD measurement, and the cassettes aliquoted (15 pmole) for being stored at −80° C.
7.2 Library Cloning:
DNA was prepared from the collection of FITC binding clones obtained in Example 2 (approx. 104 to clones). The collection of scFv fragments was isolated via XbaI/EcoRI digest. The vector pCAL4 (100 fmole, 10 μg) described in Example 4.3 was similarly digested with XbaI/EcoRI, gel-purified and ligated with 300 fmole of the scFv fragment collection over night at 16° C. The ligation mixture was isopropanol precipitated, air-dried, and the pellets were redissolved in 100 μl of dd H2O. The ligation mixture was mixed with 1 ml of freshly prepared electrocompetent SCS 101 cells (for optimization of L-CDR3), or XL1 Blue cells (for optimization of H-CDR2) on ice. One round of electroporation was performed and the transformants were eluted in SOC medium, shaken at 37° C. for 30 minutes, and an aliquot plated out on LB plates (Amp/Tet/Glucose) at 37° C. for 6-9 hrs. The number of transformants was 5×104.
Vector DNA (100 μg) was isolated and digested (sequence and restriction map of scH3κ2 see FIG. 8) with BbsI/MscI for optimization of L-CDR3, or XhoI/NspV for optimization of H-CDR2. 10 μg of purified vector fragments (5 pmole) were ligated with 15 pmole of the L-CDR3 or H-CDR2 library cassettes over night at 16° C. The ligation mixtures were isopropanol precipitated, air-dried, and the pellets were redissolved in 100 μl of dd H2O. The ligation mixtures were mixed with 1 ml of freshly prepared electrocompetent XL1 Blue cells on ice. Electroporation was performed and the transformants were eluted in SOC medium and shaken at 37° C. for 30 minutes. An aliquot was plated out on LB plates (Amp/Tet/Glucose) at 37° C. for 6-9 hrs. The number of transformants (library size) was greater than 108 for both libraries. The libraries were stored as glycerol cultures.
7.3. Biopanning
This was performed as described for the initial H3κ2 H-CDR3 library in Example 2.1. Optimized scFvs binding to FITC could be characterized and analyzed as described in Example 2.2 and 2.3, and further rounds of optimization could be made if necessary.
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TABLE 1A







Human kappa germline gene segments










Used Name1
Reference2
Family3
Germline genes4













Vk1-1
9
1
O8; O18; DPK1


Vk1-2
1
1
L14; DPK2


Vk1-3
2
1
L15(1); HK101; HK146; HK189


Vk1-4
9
1
L11


Vk1-5
2
1
A30


Vk1-6
1
1
LFVK5


Vk1-7
1
1
LFVK431


Vk1-8
1
1
L1; HK137


Vk1-9
1
1
A20; DPK4


Vk1-10
1
1
L18; Va′′


Vk1-11
1
1
L4; L18; Va′; V4a


Vk1-12
2
1
L5; L19(1); Vb; Vb4;





DPK5; L19(2); Vb′′; DPK6


Vk1-13
2
1
L15(2); HK134; HK166; DPK7


Vk1-14
8
1
L8; Vd; DPK8


Vk1-15
8
1
L9; Ve


Vk1-16
1
1
L12(1); HK102; V1


Vk1-17
2
1
L12(2)


Vk1-18
1
1
O12a (V3b)


Vk1-19
6
1
O2; O12; DPK9


Vk1-20
2
1
L24; Ve′′; V13; DPK10


Vk1-21
1
1
O4; O14


Vk1-22
2
1
L22


Vk1-23
2
1
L23


Vk2-1
1
2
A2; DPK12


Vk2-2
6
2
O1; O11(1); DPK13


Vk2-3
6
2
O12(2); V3a


Vk2-4
2
2
L13


Vk2-5
1
2
DPK14


Vk2-6
4
2
A3; A19; DPK15


Vk2-7
4
2
A29; DPK27


Vk2-8
4
2
A13


Vk2-9
1
2
A23


Vk2-10
4
2
A7; DPK17


Vk2-11
4
2
A17; DPK18


Vk2-12
4
2
A1; DPK19


Vk3-1
11
3
A11; humkv305; DPK20


Vk3-2
1
3
L20; Vg′′


Vk3-3
2
3
L2; L16; humkv328; humkv328h2;





humkv328h5; DPK21


Vk3-4
11
3
A27; humkv325; VkRF; DPK22


Vk3-5
2
3
L25; DPK23


Vk3-6
2
3
L10(1)


Vk3-7
7
3
L10(2)


Vk3-8
7
3
L6; Vg


Vk4-1
3
4
B3; VkIV; DPK24


Vk5-1
10
5
B2; EV15


Vk6-1
12
6
A14; DPK25


Vk6-2
12
6
A10; A26; DPK26


Vk7-1
5
7
B1
















TABLE 1B







Human lambda germline gene segments










Used Name1
Reference2
Family3
Germline genes4





DPL1
1
1



DPL2
1
1
HUMLV1L1


DPL3
1
1
HUMLV122


DPL4
1
1
VLAMBDA 1.1


HUMLV117
2
1



DPL5
1
1
HUMLV117D


DPL6
1
1



DPL7
1
1
IGLV1S2


DPL8
1
1
HUMLV1042


DPL9
1
1
HUMLV101


DPL10
1
2



VLAMBDA 2.1
3
2



DPL11
1
2



DPL12
1
2



DPL13
1
2



DPL14
1
2



DPL16
1
3
Humlv418; IGLV3S1


DPL23
1
3
VI III.1


Humlv318
4
3



DPL18
1
7
4A; HUMIGLVA


DPL19
1
7



DPL21
1
8
VL8.1


HUMLV801
5
8



DPL22
1
9



DPL24
1
unassigned
VLAMBDA N.2


gVLX-4.4
6
10 
















TABLE 1C







Human heavy chain germline gene segments










Used Name1
Reference2
Family3
Germline genes4













VH1-12-1
19
1
DP10; DA-2; DA-6


VH1-12-8
22
1
RR.VH1.2


VH1-12-2
6
1
hv1263


VH1-12-9
7
1
YAC-7; RR.VH1.1; 1-69


VH1-12-3
19
1
DP3


VH1-12-4
19
1
DP21; 4d275a; VH7a


VH1-12-5
18
1
I-4.1b; V1-4.1b


VH1-12-6
21
1
1D37; VH7b; 7-81; YAC-10


VH1-12-7
19
1
DP14; VH1GRR; V1-18


VH1-13-1
10
1
71-5; DP2


VH1-13-2
10
1
E3-10


VH1-13-3
19
1
DP1


VH1-13-4
12
1
V35


VH1-13-5
8
1
V1-2b


VH1-13-6
18
1
I-2; DP75


VH1-13-7
21
1
V1-2


VH1-13-8
19
1
DP8


VH1-13-9
3
1
1-1


VH1-13-10
19
1
DP12


VH1-13-11
15
1
V13C


VH1-13-12
18
1
I-3b; DP25; V1-3b


VH1-13-13
3
1
1-92


VH1-13-14
18
1
I-3; V1-3


VH1-13-15
19
1
DP15; V1-8


VH1-13-16
3
1
21-2; 3-1; DP7; V1-46


VH1-13-17
16
1
HG3


VH1-13-18
19
1
DP4; 7-2; V1-45


VH1-13-19
27
1
COS 5


VH1-1X-1
19
1
DP5; 1-24P


VH2-21-1
18
2
II-5b


VH2-31-1
2
2
VH2S12-1


VH2-31-2
2
2
VH2S12-7


VH2-31-3
2
2
VH2S12-9; DP27


VH2-31-4
2
2
VH2S12-10


VH2-31-5
14
2
V2-26; DP26; 2-26


VH2-31-6
15
2
VF2-26


VH2-31-7
19
2
DP28; DA-7


VH2-31-14
7
2
YAC-3; 2-70


VH2-31-8
2
2
VH2S12-5


VH2-31-9
2
2
VH2S12-12


VH2-31-10
18
2
II-5; V2-5


VH2-31-11
2
2
VH2S12-2; VH2S12-8


VH2-31-12
2
2
VH2S12-4; VH2S12-6


VH2-31-13
2
2
VH2S12-14


VH3-11-1
13
3
v65-2; DP44


VH3-11-2
19
3
DP45


VH3-11-3
3
3
13-2; DP48


VH3-11-4
19
3
DP52


VH3-11-5
14
3
v3-13


VH3-11-6
19
3
DP42


VH3-11-7
3
3
8-1B; YAC-5; 3-66


VH3-11-8
14
3
V3-53


VH3-13-1
3
3
22-2B; DP35; V3-11


VH3-13-5
19
3
DP59; VH19; V3-35


VH3-13-6
25
3
f1-p1; DP61


VH3-13-7
19
3
DP46; GL-SJ2; COS 8;





hv3005; hv3005f3; 3d21b; 56p1


VH3-13-8
24
3
VH26


VH3-13-9
5
3
vh26c


VH3-13-10
19
3
DP47; VH26; 3-23


VH3-13-11
3
3
1-91


VH3-13-12
19
3
DP58


VH3-13-13
3
3
1-9III; DP49; 3-30; 3d28.1


VH3-13-14
24
3
3019B9; DP50; 3-33; 3d277


VH3-13-15
27
3
COS 3


VH3-13-16
19
3
DP51


VH3-13-17
16
3
H11


VH3-13-18
19
3
DP53; COS 6; 3-74; DA-8


VH3-13-19
19
3
DP54; VH3-11; V3-7


VH3-13-20
14
3
V3-64; YAC-6


VH3-13-21
14
3
V3-48


VH3-13-22
14
3
V3-43; DP33


VH3-13-23
14
3
V3-33


VH3-13-24
14
3
V3-21; DP77


VH3-13-25
14
3
V3-20; DP32


VH3-13-26
14
3
V3-9; DP31


VH3-14-1
3
3
12-2; DP29; 3-72; DA-3


VH3-14-4
7
3
YAC-9; 3-73; MTGL


VH3-14-2
4
3
VHD26


VH3-14-3
19
3
DP30


VH3-1X-1
1
3
LSG8.1; LSG9.1; LSG10.1;





HUM12IGVH; HUM13IGVH


VH3-1X-2
1
3
LSG11.1; HUM4IGVH


VH3-1X-3
3
3
9-1; DP38; LSG7.1; RCG1.1;





LSG1.1; LSG3.1; LSG5.1;





HUM15IGVH;





HUM2IGVH; HUM9IGVH


VH3-1X-4
1
3
LSG4.1


VH3-1X-5
1
3
LSG2.1


VH3-1X-6
1
3
LSG6.1; HUM10IGVH


VH3-1X-7
18
3
3-15; V3-15


VH3-1X-8
1
3
LSG12.1; HUM5IGVH


VH3-1X-9
14
3
V3-49


VH4-11-1
22
4
Tou-VH4.21


VH4-11-2
17
4
VH4.21; DP63; VH5; 4d76; V4-34


VH4-11-3
23
4
4.44


VH4-11-4
23
4
4.44.3


VH4-11-5
23
4
4.36


VH4-11-6
23
4
4.37


VH4-11-7
18
4
IV-4; 4.35; V4-4


VH4-11-8
17
4
VH4.11; 3d197d; DP71; 58p2


VH4-11-9
20
4
H7


VH4-11-10
20
4
H8


VH4-11-11
20
4
H9


VH4-11-12
17
4
VH4.16


VH4-11-13
23
4
4.38


VH4-11-14
17
4
VH4.15


VH4-11-15
11
4
58


VH4-11-16
10
4
71-4; V4-59


VH4-21-1
11
4
11


VH4-21-2
17
4
VH4.17; VH4.23; 4d255;





4.40; DP69


VH4-21-3
17
4
VH4.19; 79; V4-4b


VH4-21-4
19
4
DP70; 4d68; 4.41


VH4-21-5
19
4
DP67; VH4-4B


VH4-21-6
17
4
VH4.22; VHSP; VH-JA


VH4-21-7
17
4
VH4.13; 1-9II; 12G-1;





3d28d; 4.42; DP68; 4-28


VH4-21-8
26
4
hv4005; 3d24d


VH4-21-9
17
4
VH4.14


VH4-31-1
23
4
4.34; 3d230d; DP78


VH4-31-2
23
4
4.34.2


VH4-31-3
19
4
DP64; 3d216d


VH4-31-4
19
4
DP65; 4-31; 3d277d


VH4-31-5
23
4
4.33; 3d75d


VH4-31-6
20
4
H10


VH4-31-7
20
4
H11


VH4-31-8
23
4
4.31


VH4-31-9
23
4
4.32


VH4-31-10
20
4
3d277d


VH4-31-11
20
4
3d216d


VH4-31-12
20
4
3d279d


VH4-31-13
17
4
VH4.18; 4d154; DP79


VH4-31-14
8
4
V4-39


VH4-31-15
11
4
2-1; DP79


VH4-31-16
23
4
4.30


VH4-31-17
17
4
VH4.12


VH4-31-18
10
4
71-2; DP66


VH4-31-19
23
4
4.39


VH4-31-20
8
4
V4-61


VH5-12-1
9
5
VH251; DP73; VHVCW; 51-R1;





VHVLB; VHVCH; VHVTT;





VHVAU; VHVBLK;





VhAU; V5-51


VH5-12-2
17
5
VHVJB


VH5-12-3
3
5
1-v; DP80; 5-78


VH5-12-4
9
5
VH32; VHVRG; VHVMW; 5-2R1


VH6-35-1
4
6
VHVI; VH6; VHVIIS; VHVITE;





VHVIJB; VHVICH; VHVICW;





VHVIBLK; VHVIMW; DP74;





6-1G1; V6-1
















TABLE 2A







rearranged human kappa sequences















Computed
Germline
Diff. to
% diff. to



Name1
aa2
family3
gene4
germline5
germline6
Reference7
















III-3R
108
1
O8
1
1.1%
70


No. 86
109
1
O8
3
3.2%
80


AU
108
1
O8
6
6.3%
103


ROY
108
1
O8
6
6.3%
43


IC4
108
1
O8
6
6.3%
70


HIV-B26
106
1
O8
3
3.2%
8


GRI
108
1
O8
8
8.4%
30


AG
106
1
O8
8
8.6%
116


REI
108
1
O8
9
9.5%
86


CLL PATIENT 16
88
1
O8
2
2.3%
122


CLL PATIENT 14
87
1
O8
2
2.3%
122


CLL PATIENT 15
88
1
O8
2
2.3%
122


GM4672
108
1
O8
11
11.6%
24


HUM. YFC51.1
108
1
O8
12
12.6%
110


LAY
108
1
O8
12
12.6%
48


HIV-b13
106
1
O8
9
9.7%
8


MAL-NaCl
108
1
O8
13
13.7%
102


STRAb SA-1A
108
1
O2
0
0.0%
120


HuVHCAMP
108
1
O8
13
13.7%
100


CRO
108
1
O2
10
10.5%
30


Am 107
108
1
O2
12
12.6%
108


WALKER
107
1
O2
4
4.2%
57


III-2R
109
1
A20
0
0.0%
70


FOG1-A4
107
1
A20
4
4.2%
41


HK137
95
1
L1
0
0.0%
10


CEA4-8A
107
1
O2
7
7.4%
41


Va′
95
1
L4
0
0.0%
90


TR1.21
108
1
O2
4
4.2%
92


HAU
108
1
O2
6
6.3%
123


HK102
95
1
L12(1)
0
0.0%
9


H20C3K
108
1
L12(2)
3
3.2%
125


CHEB
108
1
O2
7
7.4%
5


HK134
95
1
L15(2)
0
0.0%
10


TEL9
108
1
O2
9
9.5%
73


TR1.32
103
1
O2
3
3.2%
92


RF-KES1
97
1
A20
4
4.2%
121


WES
108
1
L5
10
10.5%
61


DILp1
95
1
O4
1
1.1%
70


SA-4B
107
1
L12(2)
8
8.4%
120


HK101
95
1
L15(1)
0
0.0%
9


TR1.23
108
1
O2
5
5.3%
92


HF2-1/17
108
1
A30
0
0.0%
4


2E7
108
1
A30
1
1.1%
62


33.C9
107
1
L12(2)
7
7.4%
126


3D6
105
1
L12(2)
2
2.1%
34


I-2a
108
1
L8
8
8.4%
70


RF-KL1
97
1
L8
4
4.2%
121


TNF-E7
108
1
A30
9
9.5%
41


TR1.22
108
1
O2
7
7.4%
92


HIV-B35
106
1
O2
2
2.2%
8


HIV-b22
106
1
O2
2
2.2%
8


HIV-b27
106
1
O2
2
2.2%
8


HIV-B8
107
1
O2
10
10.8%
8


HIV-b3
107
1
O2
10
10.8%
8


RF-SJ5
95
1
A30
5
5.3%
113


GAL(I)
108
1
A30
6
6.3%
64


R3.5H5G
108
1
O2
6
6.3%
70


HIV-b14
106
1
A20
2
2.2%
8


TNF-E1
105
1
L5
8
8.4%
41


WEA
108
1
A30
8
8.4%
37


EU
108
1
L12(2)
5
5.3%
40


FOG1-G8
108
1
L8
11
11.6%
41


1X7RG1
108
1
L1
8
8.4%
70


BLI
108
1
L8
3
3.2%
72


KUE
108
1
L12(2)
11
11.6%
32


LUNm01
108
1
L12(2)
10
10.5%
6


HIV-b1
106
1
A20
4
4.3%
8


HIV-s4
103
1
O2
2
2.2%
8


CAR
107
1
L12(2)
11
11.7%
79


BR
107
1
L12(2)
11
11.6%
50


CLL PATIENT 10
88
1
O2
0
0.0%
122


CLL PATIENT 12
88
1
O2
0
0.0%
122


KING
108
1
L12(2)
12
12.6%
30


V13
95
1
L24
0
0.0%
46


CLL PATIENT 11
87
1
O2
0
0.0%
122


CLL PATIENT 13
87
1
O2
0
0.0%
122


CLL PATIENT 9
88
1
O12
1
1.1%
122


HIV-B2
106
1
A20
9
9.7%
8


HIV-b2
106
1
A20
9
9.7%
8


CLL PATIENT 5
88
1
A20
1
1.1%
122


CLL PATIENT 1
88
1
L8
2
2.3%
122


CLL PATIENT 2
88
1
L8
0
0.0%
122


CLL PATIENT 7
88
1
L5
0
0.0%
122


CLL PATIENT 8
88
1
L5
0
0.0%
122


HIV-b5
105
1
L5
11
12.0%
8


CLL PATIENT 3
87
1
L8
1
1.1%
122


CLL PATIENT 4
88
1
L9
0
0.0%
122


CLL PATIENT 18
85
1
L9
6
7.1%
122


CLL PATIENT 17
86
1
L12(2)
7
8.1%
122


HIV-b20
107
3
A27
11
11.7%
8


2C12
108
1
L12(2)
20
21.1%
68


1B11
108
1
L12(2)
20
21.1%
68


1H1
108
1
L12(2)
21
22.1%
68


2A12
108
1
L12(2)
21
22.1%
68


CUR
109
3
A27
0
0.0%
66


GLO
109
3
A27
0
0.0%
16


RF-TS1
96
3
A27
0
0.0%
121


GAR′
109
3
A27
0
0.0%
67


FLO
109
3
A27
0
0.0%
66


PIE
109
3
A27
0
0.0%
91


HAH 14.1
109
3
A27
1
1.0%
51


HAH 14.2
109
3
A27
1
1.0%
51


HAH 16.1
109
3
A27
1
1.0%
51


NOV
109
3
A27
1
1.0%
52


33.F12
108
3
A27
1
1.0%
126


8E10
110
3
A27
1
1.0%
25


TH3
109
3
A27
1
1.0%
25


HIC (R)
108
3
A27
0
0.0%
51


SON
110
3
A27
1
1.0%
67


PAY
109
3
A27
1
1.0%
66


GOT
109
3
A27
1
1.0%
67


mAbA6H4C5
109
3
A27
1
1.0%
12


BOR′
109
3
A27
2
2.1%
84


RF-SJ3
96
3
A27
2
2.1%
121


SIE
109
3
A27
2
2.1%
15


ESC
109
3
A27
2
2.1%
98


HEW′
110
3
A27
2
2.1%
98


YES8c
109
3
A27
3
3.1%
33


TI
109
3
A27
3
3.1%
114


mAb113
109
3
A27
3
3.1%
71


HEW
107
3
A27
0
0.0%
94


BRO
106
3
A27
0
0.0%
94


ROB
106
3
A27
0
0.0%
94


NG9
96
3
A27
4
4.2%
11


NEU
109
3
A27
4
4.2%
66


WOL
109
3
A27
4
4.2%
2


35G6
109
3
A27
4
4.2%
59


RF-SJ4
109
3
A11
0
0.0%
88


KAS
109
3
A27
4
4.2%
84


BRA
106
3
A27
1
1.1%
94


HAH
106
3
A27
1
1.1%
94


HIC
105
3
A27
0
0.0%
94


FS-2
109
3
A27
6
6.3%
87


JH′
107
3
A27
6
6.3%
38


EV1-15
109
3
A27
6
6.3%
83


SCA
108
3
A27
6
6.3%
65


mAb112
109
3
A27
6
6.3%
71


SIC
103
3
A27
3
3.3%
94


SA-4A
109
3
A27
6
6.3%
120


SER
108
3
A27
6
6.3%
98


GOL′
109
3
A27
7
7.3%
82


B5G10K
105
3
A27
9
9.7%
125


HG2B10K
110
3
A27
9
9.4%
125


Taykv322
105
3
A27
5
5.4%
52


CLL PATIENT 24
89
3
A27
1
1.1%
122


HIV-b24
107
3
A27
7
7.4%
8


HIV-b6
107
3
A27
7
7.4%
8


Taykv310
99
3
A27
1
1.1%
52


KA3D1
108
3
L6
0
0.0%
85


19.E7
107
3
L6
0
0.0%
126


rsv6L
109
3
A27
12
12.5%
7


Taykv320
98
3
A27
1
1.2%
52


Vh
96
3
L10(2)
0
0.0%
89


LS8
108
3
L6
1
1.1%
109


LS1
108
3
L6
1
1.1%
109


LS2S3-3
107
3
L6
2
2.1%
99


LS2
108
3
L6
1
1.1%
109


LS7
108
3
L6
1
1.1%
109


LS2S3-4d
107
3
L6
2
2.1%
99


LS2S3-4a
107
3
L6
2
2.1%
99


LS4
108
3
L6
1
1.1%
109


LS6
108
3
L6
1
1.1%
109


LS2S3-10a
107
3
L6
2
2.1%
99


LS2S3-8c
107
3
L6
2
2.1%
99


LS5
108
3
L6
1
1.1%
109


LS2S3-5
107
3
L6
3
3.2%
99


LUNm03
109
3
A27
13
13.5%
6


IARC/BL41
108
3
A27
13
13.7%
55


slkv22
99
3
A27
3
3.5%
13


POP
108
3
L6
4
4.2%
111


LS2S3-10b
107
3
L6
3
3.2%
99


LS2S3-8f
107
3
L6
3
3.2%
99


LS2S3-12
107
3
L6
3
3.2%
99


HIV-B30
107
3
A27
11
11.7%
8


HIV-B20
107
3
A27
11
11.7%
8


HIV-b3
108
3
A27
11
11.7%
8


HIV-s6
104
3
A27
9
9.9%
8


YSE
107
3
L2/L16
1
1.1%
72


POM
109
3
L2/L16
9
9.4%
53


Humkv328
95
3
L2/L16
1
1.1%
19


CLL
109
3
L2/L16
3
3.2%
47


LES
96
3
L2/L16
3
3.2%
38


HIV-s5
104
3
A27
11
12.1%
8


HIV-s7
104
3
A27
11
12.1%
8


slkv1
99
3
A27
7
8.1%
13


Humka31es
95
3
L2/L16
4
4.2%
18


slkv12
101
3
A27
8
9.2%
13


RF-TS2
95
3
L2/L16
3
3.2%
121


II-1
109
3
L2/L16
4
4.2%
70


HIV-s3
105
3
A27
13
14.3%
8


RF-TMC1
96
3
L6
10
10.5%
121


GER
109
3
L2/L16
7
7.4%
75


GF4/1.1
109
3
L2/L16
8
8.4%
36


mAb114
109
3
L2/L16
6
6.3%
71


HIV-loop13
109
3
L2/L16
7
7.4%
8


bkv16
86
3
L6
1
1.2%
13


CLL PATIENT 29
86
3
L6
1
1.2%
122


slkv9
98
3
L6
3
3.5%
13


bkv17
99
3
L6
1
1.2%
13


slkv14
99
3
L6
1
1.2%
13


slkv16
101
3
L6
2
2.3%
13


bkv33
101
3
L6
4
4.7%
13


slkv15
99
3
L6
2
2.3%
13


bkv6
100
3
L6
3
3.5%
13


R6B8K
108
3
L2/L16
12
12.6%
125


AL 700
107
3
L2/L16
9
9.5%
117


slkv11
100
3
L2/L16
3
3.5%
13


slkv4
97
3
L6
4
4.8%
13


CLL PATIENT 26
87
3
L2/L16
1
1.1%
122


AL Se124
103
3
L2/L16
9
9.5%
117


slkv13
100
3
L2/L16
6
7.0%
13


bkv7
100
3
L2/L16
5
5.8%
13


bkv22
100
3
L2/L16
6
7.0%
13


CLL PATIENT 27
84
3
L2/L16
0
0.0%
122


bkv35
100
3
L6
8
9.3%
13


CLL PATIENT 25
87
3
L2/L16
4
4.6%
122


slkv3
86
3
L2/L16
7
8.1%
13


slkv7
99
1
O2
7
8.1%
13


HuFd79
111
3
L2/L16
24
24.2%
21


RAD
99
3
A27
9
10.3%
78


CLL PATIENT 28
83
3
L2/L16
4
4.8%
122


REE
104
3
L2/L16
25
27.2%
95


FR4
99
3
A27
8
9.2%
77


MD3.3
92
3
L6
1
1.3%
54


MD3.1
92
3
L6
0
0.0%
54


GA3.6
92
3
L6
2
2.6%
54


M3.5N
92
3
L6
3
3.8%
54


WEI′
82
3
A27
0
0.0%
65


MD3.4
92
3
L2/L16
1
1.3%
54


MD3.2
91
3
L6
3
3.8%
54


VER
97
3
A27
19
22.4%
20


CLL PATIENT 30
78
3
L6
3
3.8%
122


M3.1N
92
3
L2/L16
1
1.3%
54


MD3.6
91
3
L2/L16
0
0.0%
54


MD3.8
91
3
L2/L16
0
0.0%
54


GA3.4
92
3
L6
7
9.0%
54


M3.6N
92
3
A27
0
0.0%
54


MD3.10
92
3
A27
0
0.0%
54


MD3.13
91
3
A27
0
0.0%
54


MD3.7
93
3
A27
0
0.0%
54


MD3.9
93
3
A27
0
0.0%
54


GA3.1
93
3
A27
6
7.6%
54


bkv32
101
3
A27
5
5.7%
13


GA3.5
93
3
A27
5
6.3%
54


GA3.7
92
3
A27
7
8.9%
54


MD3.12
92
3
A27
2
2.5%
54


M3.2N
90
3
L6
6
7.8%
54


MD3.5
92
3
A27
1
1.3%
54


M3.4N
91
3
L2/L16
8
10.3%
54


M3.8N
91
3
L2/L16
7
9.0%
54


M3.7N
92
3
A27
3
3.8%
54


GA3.2
92
3
A27
9
11.4%
54


GA3.8
93
3
A27
4
5.1%
54


GA3.3
92
3
A27
8
10.1%
54


M3.3N
92
3
A27
5
6.3%
54


B6
83
3
A27
8
11.3%
78


E29.1 KAPPA
78
3
L2/L16
0
0.0%
22


SCW
108
1
O8
12
12.6%
31


REI-based CAMPATH-9
107
1
O8
14
14.7%
39


RZ
107
1
O8
14
14.7%
50


BI
108
1
O8
14
14.7%
14


AND
107
1
O2
13
13.7%
69


2A4
109
1
O2
12
12.6%
23


KA
108
1
O8
19
20.0%
107


MEV
109
1
O2
14
14.7%
29


DEE
106
1
O2
13
14.0%
76


OU(IOC)
108
1
O2
18
18.9%
60


HuRSV19VK
111
1
O8
21
21.0%
115


SP2
108
1
O2
17
17.9%
93


BJ26
99
1
O8
21
24.1%
1


NI
112
1
O8
24
24.2%
106


BMA 0310EUCIV2
106
1
L12(1)
21
22.3%
105


CLL PATIENT 6
71
1
A20
0
0.0%
122


BJ19
85
1
O8
16
21.9%
1


GM 607
113
2
A3
0
0.0%
58


R5A3K
114
2
A3
1
1.0%
125


R1C8K
114
2
A3
1
1.0%
125


VK2.R149
113
2
A3
2
2.0%
118


TR1.6
109
2
A3
4
4.0%
92


TR1.37
104
2
A3
5
5.0%
92


FS-1
113
2
A3
6
6.0%
87


TR1.8
110
2
A3
6
6.0%
92


NIM
113
2
A3
8
8.0%
28


Inc
112
2
A3
11
11.0%
35


TEW
107
2
A3
6
6.4%
96


CUM
114
2
O1
7
6.9%
44


HRF1
71
2
A3
4
5.6%
124


CLL PATIENT 19
87
2
A3
0
0.0%
122


CLL PATIENT 20
87
2
A3
0
0.0%
122


MIL
112
2
A3
16
16.2%
26


FR
113
2
A3
20
20.0%
101


MAL-Urine
83
1
O2
6
8.6%
102


Taykv306
73
3
A27
1
1.6%
52


Taykv312
75
3
A27
1
1.6%
52


HIV-b29
93
3
A27
14
17.5%
8


1-185-37
110
3
A27
0
0.0%
119


1-187-29
110
3
A27
0
0.0%
119


TT117
110
3
A27
9
9.4%
63


HIV-loop8
108
3
A27
16
16.8%
8


rsv23L
108
3
A27
16
16.8%
7


HIV-b7
107
3
A27
14
14.9%
8


HIV-b11
107
3
A27
15
16.0%
8


HIV-LC1
107
3
A27
19
20.2%
8


HIV-LC7
107
3
A27
20
21.3%
8


HIV-LC22
107
3
A27
21
22.3%
8


HIV-LC13
107
3
A27
21
22.3%
8


HIV-LC3
107
3
A27
21
22.3%
8


HIV-LC5
107
3
A27
21
22.3%
8


HIV-LC28
107
3
A27
21
22.3%
8


HIV-b4
107
3
A27
22
23.4%
8


CLL PATIENT 31
87
3
A27
15
17.2%
122


HIV-loop2
108
3
L2/L16
17
17.9%
8


HIV-loop35
108
3
L2/L16
17
17.9%
8


HIV-LC11
107
3
A27
23
24.5%
8


HIV-LC24
107
3
A27
23
24.5%
8


HIV-b12
107
3
A27
24
25.5%
8


HIV-LC25
107
3
A27
24
25.5%
8


HIV-b21
107
3
A27
24
25.5%
8


HIV-LC26
107
3
A27
26
27.7%
8


G3D10K
108
1
L12(2)
12
12.6%
125


TT125
108
1
L5
8
8.4%
63


HIV-s2
103
3
A27
28
31.1%
8


265-695
108
1
L5
7
7.4%
3


2-115-19
108
1
A30
2
2.1%
119


rsv13L
107
1
O2
20
21.1%
7


HIV-b18
106
1
O2
14
15.1%
8


RF-KL5
98
3
L6
36
36.7%
97


ZM1-1
113
2
A17
7
7.0%
3


HIV-s8
103
1
O8
16
17.8%
8


K-EV15
95
5
B2
0
0.0%
112


RF-TS3
100
2
A23
0
0.0%
121


HF-21/28
111
2
A17
1
1.0%
17


RPMI6410
113
2
A17
1
1.0%
42


JC11
113
2
A17
1
1.0%
49


O-81
114
2
A17
5
5.0%
45


FK-001
113
4
B3
0
0.0%
81


CD5+.28
101
4
B3
1
1.0%
27


LEN
114
4
B3
1
1.0%
104


UC
114
4
B3
1
1.0%
111


CD5+.5
101
4
B3
1
1.0%
27


CD5+.26
101
4
B3
1
1.0%
27


CD5+.12
101
4
B3
2
2.0%
27


CD5+.23
101
4
B3
2
2.0%
27


CD5+.7
101
4
B3
2
2.0%
27


VJI
113
4
B3
3
3.0%
56


LOC
113
4
B3
3
3.0%
72


MAL
113
4
B3
3
3.0%
72


CD5+.6
101
4
B3
3
3.0%
27


H2F
113
4
B3
3
3.0%
70


PB17IV
114
4
B3
4
4.0%
74


CD5+.27
101
4
B3
4
4.0%
27


CD5+.9
101
4
B3
4
4.0%
27


CD5−.28
101
4
B3
5
5.0%
27


CD5−.26
101
4
B3
6
5.9%
27


CD5+.24
101
4
B3
6
5.9%
27


CD5+.10
101
4
B3
6
5.9%
27


CD5−.19
101
4
B3
6
5.9%
27


CD5−.18
101
4
B3
7
6.9%
27


CD5−.16
101
4
B3
8
7.9%
27


CD5−.24
101
4
B3
8
7.9%
27


CD5−.17
101
4
B3
10
9.9%
27


MD4.1
92
4
B3
0
0.0%
54


MD4.4
92
4
B3
0
0.0%
54


MD4.5
92
4
B3
0
0.0%
54


MD4.6
92
4
B3
0
0.0%
54


MD4.7
92
4
B3
0
0.0%
54


MD4.2
92
4
B3
1
1.3%
54


MD4.3
92
4
B3
5
6.3%
54


CLL PATIENT 22
87
2
A17
2
2.3%
122


CLL PATIENT 23
84
2
A17
2
2.4%
122
















TABLE 2B







rearranged human lambda sequences















Computed
Germline
Diff. to
% diff. to



Name1
aa2
family3
gene4
germline5
germline6
Reference7
















WAH
110
1
DPL3
7
7%
68


1B9/F2
112
1
DPL3
7
7%
9


DIA
112
1
DPL2
7
7%
36


mAb67
89
1
DPL3
0
0%
29


HiH2
110
1
DPL3
12
11%
3


NIG-77
112
1
DPL2
9
9%
72


OKA
112
1
DPL2
7
7%
84


KOL
112
1
DPL2
12
11%
40


T2:C5
111
1
DPL5
0
0%
6


T2:C14
110
1
DPL5
0
0%
6


PR-TS1
110
1
DPL5
0
0%
55


4G12
111
1
DPL5
1
1%
35


KIM46L
112
1
HUMLV117
0
0%
8


Fog-B
111
1
DPL5
3
3%
31


9F2L
111
1
DPL5
3
3%
79


mAb111
110
1
DPL5
3
3%
48


PHOX15
111
1
DPL5
4
4%
49


BL2
111
1
DPL5
4
4%
74


NIG-64
111
1
DPL5
4
4%
72


RF-SJ2
100
1
DPL5
6
6%
78


AL EZI
112
1
DPL5
7
7%
41


ZIM
112
1
HUMLV117
7
7%
18


RF-SJ1
100
1
DPL5
9
9%
78


IGLV1.1
98
1
DPL4
0
0%
1


NEW
112
1
HUMLV117
11
10%
42


CB-201
87
1
DPL2
1
1%
62


MEM
109
1
DPL2
6
6%
50


H210
111
2
DPL10
4
4%
45


NOV
110
2
DPL10
8
8%
25


NEI
111
2
DPL10
8
8%
24


AL MC
110
2
DPL11
6
6%
28


MES
112
2
DPL11
8
8%
84


FOG1-A3
111
2
DPL11
9
9%
27


AL NOV
112
2
DPL11
7
7%
28


HMST-1
110
2
DPL11
4
4%
82


HBW4-1
108
2
DPL12
9
9%
52


WH
110
2
DPL11
11
11%
34


11-50
110
2
DPL11
7
7%
82


HBp2
110
2
DPL12
8
8%
3


NIG-84
113
2
DPL11
12
11%
73


VIL
112
2
DPL11
9
9%
58


TRO
111
2
DPL12
10
10%
61


ES492
108
2
DPL11
15
15%
76


mAb216
89
2
DPL12
1
1%
7


BSA3
109
3
DPL16
0
0%
49


THY-29
110
3
DPL16
0
0%
27


PR-TS2
108
3
DPL16
0
0%
55


E29.1 LAMBDA
107
3
DPL16
1
1%
13


mAb63
109
3
DPL16
2
2%
29


TEL14
110
3
DPL16
6
6%
49


6H-3C4
108
3
DPL16
7
7%
39


SH
109
3
DPL16
7
7%
70


AL GIL
109
3
DPL16
8
8%
23


H6-3C4
108
3
DPL16
8
8%
83


V-lambda-2.DS
111
2
DPL11
3
3%
15


8.12 ID
110
2
DPL11
3
3%
81


DSC
111
2
DPL11
3
3%
56


PV11
110
2
DPL11
1
1%
56


33.H11
110
2
DPL11
4
4%
81


AS17
111
2
DPL11
7
7%
56


SD6
110
2
DPL11
7
7%
56


KS3
110
2
DPL11
9
9%
56


PV6
110
2
DPL12
5
5%
56


NGD9
110
2
DPL11
7
7%
56


MUC1-1
111
2
DPL11
11
10%
27


A30c
111
2
DPL10
6
6%
56


KS6
110
2
DPL12
6
6%
56


TEL13
111
2
DPL11
11
10%
49


AS7
110
2
DPL12
6
6%
56


MCG
112
2
DPL12
12
11%
20


U266L
110
2
DPL12
13
12%
77


PR-SJ2
110
2
DPL12
14
13%
55


BOH
112
2
DPL12
11
10%
37


TOG
111
2
DPL11
19
18%
53


TEL16
111
2
DPL11
19
18%
49


No. 13
110
2
DPL10
14
13%
52


BO
112
2
DPL12
18
17%
80


WIN
112
2
DPL12
17
16%
11


BUR
104
2
DPL12
15
15%
46


NIG-58
110
2
DPL12
20
19%
69


WEIR
112
2
DPL11
26
25%
21


THY-32
111
1
DPL8
8
8%
27


TNF-H9G1
111
1
DPL8
9
9%
27


mAb61
111
1
DPL3
1
1%
29


LV1L1
98
1
DPL2
0
0%
54


HA
113
1
DPL3
14
13%
63


LA1L1
111
1
DPL2
3
3%
54


RHE
112
1
DPL1
17
16%
22


K1B12L
113
1
DPL8
17
16%
79


LOC
113
1
DPL2
15
14%
84


NIG-51
112
1
DPL2
12
11%
67


NEWM
104
1
DPL8
23
22%
10


MD3-4
106
3
DPL23
14
13%
4


COX
112
1
DPL2
13
12%
84


HiH10
106
3
DPL23
13
12%
3


VOR
112
1
DPL2
16
15%
16


AL POL
113
1
DPL2
16
15%
57


CD4-74
111
1
DPL2
19
18%
27


AMYLOID MOL
102
3
DPL23
15
15%
30


OST577
108
3
Humlv318
10
10%
4


NIG-48
113
1
DPL3
42
40%
66


CARR
108
3
DPL23
18
17%
19


mAb60
108
3
DPL23
14
13%
29


NIG-68
99
3
DPL23
25
26%
32


KERN
107
3
DPL23
26
25%
59


ANT
106
3
DPL23
17
16%
19


LEE
110
3
DPL23
18
17%
85


CLE
94
3
DPL23
17
17%
19


VL8
98
8
DPL21
0
0%
81


MOT
110
3
Humlv318
23
22%
38


GAR
108
3
DPL23
26
25%
33


32.B9
98
8
DPL21
5
5%
81


PUG
108
3
Humlv318
24
23%
19


T1
115
8
HUMLV801
52
50%
6


RF-TS7
96
7
DPL18
4
4%
60


YM-1
116
8
HUMLV801
51
49%
75


K6H6
112
8
HUMLV801
20
19%
44


K5C7
112
8
HUMLV801
20
19%
44


K5B8
112
8
HUMLV801
20
19%
44


K5G5
112
8
HUMLV801
20
19%
44


K4B8
112
8
HUMLV801
19
18%
44


K6F5
112
8
HUMLV801
17
16%
44


HIL
108
3
DPL23
22
21%
47


KIR
109
3
DPL23
20
19%
19


CAP
109
3
DPL23
19
18%
84


1B8
110
3
DPL23
22
21%
43


SHO
108
3
DPL23
19
18%
19


HAN
108
3
DPL23
20
19%
19


cML23
96
3
DPL23
3
3%
12


PR-SJ1
96
3
DPL23
7
7%
55


BAU
107
3
DPL23
9
9%
5


TEX
99
3
DPL23
8
8%
19


X(PET)
107
3
DPL23
9
9%
51


DOY
106
3
DPL23
9
9%
19


COT
106
3
DPL23
13
12%
19


Pag-1
111
3
Humlv318
5
5%
31


DIS
107
3
Humlv318
2
2%
19


WIT
108
3
Humlv318
7
7%
19


I.RH
108
3
Humlv318
12
11%
19


S1-1
108
3
Humlv318
12
11%
52


DEL
108
3
Humlv318
14
13%
17


TYR
108
3
Humlv318
11
10%
19


J.RH
109
3
Humlv318
13
12%
19


THO
112
2
DPL13
38
36%
26


LBV
113
1
DPL3
38
36%
2


WLT
112
1
DPL3
33
31%
14


SUT
112
2
DPL12
37
35%
65
















TABLE 2C







rearranged human heavy chain sequences















Computed
Germline
Diff. to
% diff. to



Name1
aa2
family3
gene4
germline5
germline6
Reference7
















21/28
119
1
VH1-13-12
0
0.0%
31


8E10
123
1
VH1-13-12
0
0.0%
31


MUC1-1
118
1
VH1-13-6
4
4.1%
42


gF1
98
1
VH1-13-12
10
10.2%
75


VHGL 1.2
98
1
VH1-13-6
2
2.0%
26


HV1L1
98
1
VH1-13-6
0
0.0%
81


RF-TS7
104
1
VH1-13-6
3
3.1%
96


E55 1.A15
106
1
VH1-13-15
1
1.0%
26


HA1L1
126
1
VH1-13-6
7
7.1%
81


UC
123
1
VH1-13-6
5
5.1%
105


WIL2
123
1
VH1-13-6
6
6.1%
55


R3.5H5G
122
1
VH1-13-6
10
10.2%
70


N89P2
123
1
VH1-13-16
11
11.2%
77


mAb113
126
1
VH1-13-6
10
10.2%
71


LS2S3-3
125
1
VH1-12-7
5
5.1%
98


LS2S3-12a
125
1
VH1-12-7
5
5.1%
98


LS2S3-5
125
1
VH1-12-7
5
5.1%
98


LS2S3-12e
125
1
VH1-12-7
5
5.1%
98


LS2S3-4
125
1
VH1-12-7
5
5.1%
98


LS2S3-10
125
1
VH1-12-7
5
5.1%
98


LS2S3-12d
125
1
VH1-12-7
6
6.1%
98


LS2S3-8
125
1
VH1-12-7
5
5.1%
98


LS2
125
1
VH1-12-7
6
6.1%
113


LS4
105
1
VH1-12-7
6
6.1%
113


LS5
125
1
VH1-12-7
6
6.1%
113


LS1
125
1
VH1-12-7
6
6.1%
113


LS6
125
1
VH1-12-7
6
6.1%
113


LS8
125
1
VH1-12-7
7
7.1%
113


THY-29
122
1
VH1-12-7
0
0.0%
42


1B9/F2
122
1
VH1-12-7
10
10.2%
21


51P1
122
1
VH1-12-1
0
0.0%
105


NEI
127
1
VH1-12-1
0
0.0%
55


AND
127
1
VH1-12-1
0
0.0%
55


L7
127
1
VH1-12-1
0
0.0%
54


L22
124
1
VH1-12-1
0
0.0%
54


L24
127
1
VH1-12-1
0
0.0%
54


L26
116
1
VH1-12-1
0
0.0%
54


L33
119
1
VH1-12-1
0
0.0%
54


L34
117
1
VH1-12-1
0
0.0%
54


L36
118
1
VH1-12-1
0
0.0%
54


L39
120
1
VH1-12-1
0
0.0%
54


L41
120
1
VH1-12-1
0
0.0%
54


L42
125
1
VH1-12-1
0
0.0%
54


VHGL 1.8
101
1
VH1-12-1
0
0.0%
26


783c
127
1
VH1-12-1
0
0.0%
22


X17115
127
1
VH1-12-1
0
0.0%
37


L25
124
1
VH1-12-1
0
0.0%
54


L17
120
1
VH1-12-1
1
1.0%
54


L30
127
1
VH1-12-1
1
1.0%
54


L37
120
1
VH1-12-1
1
1.0%
54


TNF-E7
116
1
VH1-12-1
2
2.0%
42


mAb111
122
1
VH1-12-1
7
7.1%
71


III-2R
122
1
VH1-12-9
3
3.1%
70


KAS
121
1
VH1-12-1
7
7.1%
79


YES8c
122
1
VH1-12-1
8
8.2%
34


RF-TS1
123
1
VH1-12-1
8
8.2%
82


BOR′
121
1
VH1-12-8
7
7.1%
79


VHGL 1.9
101
1
VH1-12-1
8
8.2%
26


mAb410.30F305
117
1
VH1-12-9
5
5.1%
52


EV1-15
127
1
VH1-12-8
10
10.2%
78


mAb112
122
1
VH1-12-1
11
11.2%
71


EU
117
1
VH1-12-1
11
11.2%
28


H210
127
1
VH1-12-1
12
12.2%
66


TRANSGENE
104
1
VH1-12-1
0
0.0%
111


CLL2-1
93
1
VH1-12-1
0
0.0%
30


CLL10 13-3
97
1
VH1-12-1
0
0.0%
29


LS7
99
1
VH1-12-7
4
4.1%
113


ALL7-1
87
1
VH1-12-7
0
0.0%
30


CLL3-1
91
1
VH1-12-7
1
1.0%
30


ALL56-1
85
1
VH1-13-8
0
0.0%
30


ALL1-1
87
1
VH1-13-6
1
1.0%
30


ALL4-1
94
1
VH1-13-8
0
0.0%
30


ALL56 15-4
85
1
VH1-13-8
5
5.1%
29


CLL4-1
88
1
VH1-13-1
1
1.0%
30


Au92.1
98
1
VH1-12-5
0
0.0%
49


RF-TS3
120
1
VH1-12-5
1
1.0%
82


Au4.1
98
1
VH1-12-5
1
1.0%
49


HP1
121
1
VH1-13-6
13
13.3%
110


BLI
127
1
VH1-13-15
5
5.1%
72


No. 13
127
1
VH1-12-2
19
19.4%
76


TR1.23
122
1
VH1-13-2
23
23.5%
88


S1-1
125
1
VH1-12-2
18
18.4%
76


TR1.10
119
1
VH1-13-12
14
14.3%
88


E55 1.A2
102
1
VH1-13-15
3
3.1%
26


SP2
119
1
VH1-13-6
15
15.3%
89


TNF-H9G1
111
1
VH1-13-18
2
2.0%
42


G3D10H
127
1
VH1-13-16
19
19.4%
127


TR1.9
118
1
VH1-13-12
14
14.3%
88


TR1.8
121
1
VH1-12-1
24
24.5%
88


LUNm01
127
1
VH1-13-6
22
22.4%
9


K1B12H
127
1
VH1-12-7
23
23.5%
127


L3B2
99
1
VH1-13-6
2
2.0%
46


ss2
100
1
VH1-13-6
2
2.0%
46


No. 86
124
1
VH1-12-1
20
20.4%
76


TR1.6
124
1
VH1-12-1
19
19.4%
88


ss7
99
1
VH1-12-7
3
3.1%
46


s5B7
102
1
VH1-12-1
0
0.0%
46


s6A3
97
1
VH1-12-1
0
0.0%
46


ss6
99
1
VH1-12-1
0
0.0%
46


L2H7
103
1
VH1-13-12
0
0.0%
46


s6BG8
93
1
VH1-13-12
0
0.0%
46


s6C9
107
1
VH1-13-12
0
0.0%
46


HIV-b4
124
1
VH1-13-12
21
21.4%
12


HIV-b12
124
1
VH1-13-12
21
21.4%
12


L3G5
98
1
VH1-13-6
1
1.0%
46


22
115
1
VH1-13-6
11
11.2%
118


L2A12
99
1
VH1-13-15
3
3.1%
46


PHOX15
124
1
VH1-12-7
20
20.4%
73


LUNm03
127
1
VH1-1X-1
18
18.4%
9


CEA4-8A
129
1
VH1-12-7
1
1.0%
42


M60
121
2
VH2-31-3
3
3.0%
103


HiH10
127
2
VH2-31-5
9
9.0%
4


COR
119
2
VH2-31-2
11
11.0%
91


2-115-19
124
2
VH2-31-11
8
8.1%
124


OU
125
2
VH2-31-14
20
25.6%
92


HE
120
2
VH2-31-13
19
19.0%
27


CLL33 40-1
78
2
VH2-31-5
2
2.0%
29


E55 3.9
88
3
VH3-11-5
7
7.2%
26


MTFC3
125
3
VH3-14-4
21
21.0%
131


MTFC11
125
3
VH3-14-4
21
21.0%
131


MTFJ1
114
3
VH3-14-4
21
21.0%
131


MTFJ2
114
3
VH3-14-4
21
21.0%
131


MTFUJ4
100
3
VH3-14-4
21
21.0%
131


MTFUJ5
100
3
VH3-14-4
21
21.0%
131


MTFUJ2
100
3
VH3-14-4
22
22.0%
131


MTFC8
125
3
VH3-14-4
23
23.0%
131


TD e Vq
113
3
VH3-14-4
0
0.0%
16


rMTF
114
3
VH3-14-4
5
5.0%
131


MTFUJ6
100
3
VH3-14-4
10
10.0%
131


RF-KES
107
3
VH3-14-4
9
9.0%
85


N51P8
126
3
VH3-14-1
9
9.0%
77


TEI
119
3
VH3-13-8
21
21.4%
20


33.H11
115
3
VH3-13-19
10
10.2%
129


SB1/D8
101
3
VH3-1X-8
14
14.0%
2


38P1
119
3
VH3-11-3
0
0.0%
104


BRO′IGM
119
3
VH3-11-3
13
13.4%
19


NIE
119
3
VH3-13-7
15
15.3%
87


3D6
126
3
VH3-13-26
5
5.1%
35


ZM1-1
112
3
VH3-11-3
8
8.2%
5


E55 3.15
110
3
VH3-13-26
0
0.0%
26


gF9
108
3
VH3-13-8
15
15.3%
75


THY-32
120
3
VH3-13-26
3
3.1%
42


RF-KL5
100
3
VH3-13-26
5
5.1%
96


OST577
122
3
VH3-13-13
6
6.1%
5


BO
113
3
VH3-13-19
15
15.3%
10


TT125
121
3
VH3-13-10
15
15.3%
64


2-115-58
127
3
VH3-13-10
11
11.2%
124


KOL
126
3
VH3-13-14
16
16.3%
102


mAb60
118
3
VH3-13-17
14
14.3%
45


RF-AN
106
3
VH3-13-26
8
8.2%
85


BUT
115
3
VH3-11-6
13
13.4%
119


KOL-based CAMPATH-9
118
3
VH3-13-13
16
16.3%
41


B1
119
3
VH3-13-19
13
13.3%
53


N98P1
127
3
VH3-13-1
13
13.3%
77


TT117
107
3
VH3-13-10
12
12.2%
64


WEA
114
3
VH3-13-12
15
15.3%
40


HIL
120
3
VH3-13-14
14
14.3%
23


s5A10
97
3
VH3-13-14
0
0.0%
46


s5D11
98
3
VH3-13-7
0
0.0%
46


s6C8
100
3
VH3-13-7
0
0.0%
46


s6H12
98
3
VH3-13-7
0
0.0%
46


VH10.7
119
3
VH3-13-14
16
16.3%
128


HIV-loop2
126
3
VH3-13-7
16
16.3%
12


HIV-loop35
126
3
VH3-13-7
16
16.3%
12


TRO
122
3
VH3-13-1
13
13.3%
61


SA-4B
123
3
VH3-13-1
15
15.3%
125


L2B5
98
3
VH3-13-13
0
0.0%
46


s6E11
95
3
VH3-13-13
0
0.0%
46


s6H7
100
3
VH3-13-13
0
0.0%
46


ss1
102
3
VH3-13-13
0
0.0%
46


ss8
94
3
VH3-13-13
0
0.0%
46


DOB
120
3
VH3-13-26
21
21.4%
116


THY-33
115
3
VH3-13-15
20
20.4%
42


NOV
118
3
VH3-13-19
14
14.3%
38


rsv13H
120
3
VH3-13-24
20
20.4%
11


L3G11
98
3
VH3-13-20
2
2.0%
46


L2E8
99
3
VH3-13-19
0
0.0%
46


L2D10
101
3
VH3-13-10
1
1.0%
46


L2E7
98
3
VH3-13-10
1
1.0%
46


L3A10
100
3
VH3-13-24
0
0.0%
46


L2E5
97
3
VH3-13-2
1
1.0%
46


BUR
119
3
VH3-13-7
21
21.4%
67


s4D5
107
3
VH3-11-3
1
1.0%
46


19
116
3
VH3-13-16
4
4.1%
118


s5D4
99
3
VH3-13-1
0
0.0%
46


s6A8
100
3
VH3-13-1
0
0.0%
46


HIV-loop13
123
3
VH3-13-12
17
17.3%
12


TR1.32
112
3
VH3-11-8
18
18.6%
88


L2B10
97
3
VH3-11-3
1
1.0%
46


TR1.5
114
3
VH3-11-8
21
21.6%
88


s6H9
101
3
VH3-13-25
0
0.0%
46


8
112
3
VH3-13-1
6
6.1%
118


23
115
3
VH3-13-1
6
6.1%
118


7
115
3
VH3-13-1
4
4.1%
118


TR1.3
120
3
VH3-11-8
20
20.6%
88


18/2
125
3
VH3-13-10
0
0.0%
32


18/9
125
3
VH3-13-10
0
0.0%
31


30P1
119
3
VH3-13-10
0
0.0%
106


HF2-1/17
125
3
VH3-13-10
0
0.0%
8


A77
109
3
VH3-13-10
0
0.0%
44


B19.7
108
3
VH3-13-10
0
0.0%
44


M43
119
3
VH3-13-10
0
0.0%
103


1/17
125
3
VH3-13-10
0
0.0%
31


18/17
125
3
VH3-13-10
0
0.0%
31


E54 3.4
109
3
VH3-13-10
0
0.0%
26


LAMBDA-VH26
98
3
VH3-13-10
1
1.0%
95


E54 3.8
111
3
VH3-13-10
1
1.0%
26


GL16
106
3
VH3-13-10
1
1.0%
44


4G12
125
3
VH3-13-10
1
1.0%
56


A73
106
3
VH3-13-10
2
2.0%
44


AL1.3
111
3
VH3-13-10
3
3.1%
117


3.A290
118
3
VH3-13-10
2
2.0%
108


Ab18
127
3
VH3-13-8
2
2.0%
100


E54 3.3
105
3
VH3-13-10
3
3.1%
26


35G6
121
3
VH3-13-10
3
3.1%
57


A95
107
3
VH3-13-10
5
5.1%
44


Ab25
128
3
VH3-13-10
5
5.1%
100


N87
126
3
VH3-13-10
4
4.1%
77


ED8.4
99
3
VH3-13-10
6
6.1%
2


RF-KL1
122
3
VH3-13-10
6
6.1%
82


AL1.1
112
3
VH3-13-10
2
2.0%
117


AL3.11
102
3
VH3-13-10
1
1.0%
117


32.B9
127
3
VH3-13-8
6
6.1%
129


TK1
109
3
VH3-13-10
2
2.0%
117


POP
123
3
VH3-13-10
8
8.2%
115


9F2H
127
3
VH3-13-10
9
9.2%
127


VD
115
3
VH3-13-10
9
9.2%
10


Vh38Cl.10
121
3
VH3-13-10
8
8.2%
74


Vh38Cl.9
121
3
VH3-13-10
8
8.2%
74


Vh38Cl.8
121
3
VH3-13-10
8
8.2%
74


63P1
120
3
VH3-11-8
0
0.0%
104


60P2
117
3
VH3-11-8
0
0.0%
104


AL3.5
90
3
VH3-13-10
2
2.0%
117


GF4/1.1
123
3
VH3-13-10
10
10.2%
39


Ab21
126
3
VH3-13-10
12
12.2%
100


TD d Vp
118
3
VH3-13-17
2
2.0%
16


Vh38Cl.4
119
3
VH3-13-10
8
8.2%
74


Vh38Cl.5
119
3
VH3-13-10
8
8.2%
74


AL3.4
104
3
VH3-13-10
1
1.0%
117


FOG1-A3
115
3
VH3-13-19
2
2.0%
42


HA3D1
117
3
VH3-13-21
1
1.0%
81


E54 3.2
112
3
VH3-13-24
0
0.0%
26


mAb52
128
3
VH3-13-12
2
2.0%
51


mAb53
128
3
VH3-13-12
2
2.0%
51


mAb56
128
3
VH3-13-12
2
2.0%
51


mAb57
128
3
VH3-13-12
2
2.0%
51


mAb58
128
3
VH3-13-12
2
2.0%
51


mAb59
128
3
VH3-13-12
2
2.0%
51


mAb105
128
3
VH3-13-12
2
2.0%
51


mAb107
128
3
VH3-13-12
2
2.0%
51


E55 3.14
110
3
VH3-13-19
0
0.0%
26


F13-28
106
3
VH3-13-19
1
1.0%
94


mAb55
127
3
VH3-13-18
4
4.1%
51


YSE
117
3
VH3-13-24
6
6.1%
72


E55 3.23
106
3
VH3-13-19
2
2.0%
26


RF-TS5
101
3
VH3-13-1
3
3.1%
85


N42P5
124
3
VH3-13-2
7
7.1%
77


FOG1-H6
110
3
VH3-13-16
7
7.1%
42


O-81
115
3
VH3-13-19
11
11.2%
47


HIV-s8
122
3
VH3-13-12
11
11.2%
12


mAb114
125
3
VH3-13-19
12
12.2%
71


33.F12
116
3
VH3-13-2
4
4.1%
129


4B4
119
3
VH3-1X-3
0
0.0%
101


M26
123
3
VH3-1X-3
0
0.0%
103


VHGL 3.1
100
3
VH3-1X-3
0
0.0%
26


E55 3.13
113
3
VH3-1X-3
1
1.0%
26


SB5/D6
101
3
VH3-1X-6
3
3.0%
2


RAY4
101
3
VH3-1X-6
3
3.0%
2


82-D V-D
106
3
VH3-1X-3
5
5.0%
112


MAL
129
3
VH3-1X-3
5
5.0%
72


LOC
123
3
VH3-1X-6
5
5.0%
72


LSF2
101
3
VH3-1X-6
11
11.0%
2


HIB RC3
100
3
VH3-1X-6
11
11.0%
1


56P1
119
3
VH3-13-7
0
0.0%
104


M72
122
3
VH3-13-7
0
0.0%
103


M74
121
3
VH3-13-7
0
0.0%
103


E54 3.5
105
3
VH3-13-7
0
0.0%
26


2E7
123
3
VH3-13-7
0
0.0%
63


2P1
117
3
VH3-13-7
0
0.0%
104


RF-SJ2
127
3
VH3-13-7
1
1.0%
83


PR-TS1
114
3
VH3-13-7
1
1.0%
85


KIM46H
127
3
VH3-13-13
0
0.0%
18


E55 3.6
108
3
VH3-13-7
2
2.0%
26


E55 3.10
107
3
VH3-13-13
1
1.0%
26


3.B6
114
3
VH3-13-13
1
1.0%
108


E54 3.6
110
3
VH3-13-13
1
1.0%
26


FL2-2
114
3
VH3-13-13
1
1.0%
80


RF-SJ3
112
3
VH3-13-7
2
2.0%
85


E55 3.5
105
3
VH3-13-14
1
1.0%
26


BSA3
121
3
VH3-13-13
1
1.0%
73


HMST-1
119
3
VH3-13-7
3
3.1%
130


RF-TS2
126
3
VH3-13-13
4
4.1%
82


E55 3.12
109
3
VH3-13-15
0
0.0%
26


19.E7
126
3
VH3-13-14
3
3.1%
129


11-50
119
3
VH3-13-13
6
6.1%
130


E29.1
120
3
VH3-13-15
2
2.0%
25


E55 3.16
108
3
VH3-13-7
6
6.1%
26


TNF-E1
117
3
VH3-13-7
7
7.1%
42


RF-SJ1
127
3
VH3-13-13
6
6.1%
83


FOG1-A4
116
3
VH3-13-7
8
8.2%
42


TNF-A1
117
3
VH3-13-15
4
4.1%
42


PR-SJ2
107
3
VH3-13-14
8
8.2%
85


HN.14
124
3
VH3-13-13
10
10.2%
33


CAM′
121
3
VH3-13-7
12
12.2%
65


HIV-B8
125
3
VH3-13-7
9
9.2%
12


HIV-b27
125
3
VH3-13-7
9
9.2%
12


HIV-b8
125
3
VH3-13-7
9
9.2%
12


HIV-s4
125
3
VH3-13-7
9
9.2%
12


HIV-B26
125
3
VH3-13-7
9
9.2%
12


HIV-B35
125
3
VH3-13-7
10
10.2%
12


HIV-b18
125
3
VH3-13-7
10
10.2%
12


HIV-b22
125
3
VH3-13-7
11
11.2%
12


HIV-b13
125
3
VH3-13-7
12
12.2%
12


333
117
3
VH3-14-4
24
24.0%
24


1H1
120
3
VH3-14-4
24
24.0%
24


1B11
120
3
VH3-14-4
23
23.0%
24


CLL30 2-3
86
3
VH3-13-19
1
1.0%
29


GA
110
3
VH3-13-7
19
19.4%
36


JeB
99
3
VH3-13-14
3
3.1%
7


GAL
110
3
VH3-13-19
10
10.2%
126


K6H6
119
3
VH3-1X-6
18
18.0%
60


K4B8
119
3
VH3-1X-6
18
18.0%
60


K5B8
119
3
VH3-1X-6
18
18.0%
60


K5C7
119
3
VH3-1X-6
19
19.0%
60


K5G5
119
3
VH3-1X-6
19
19.0%
60


K6F5
119
3
VH3-1X-6
19
19.0%
60


AL3.16
98
3
VH3-13-10
1
1.0%
117


N86P2
98
3
VH3-13-10
3
3.1%
77


N54P6
95
3
VH3-13-16
7
7.1%
77


LAMBDA HT112-1
126
4
VH4-11-2
0
0.0%
3


HY18
121
4
VH4-11-2
0
0.0%
43


mAb63
126
4
VH4-11-2
0
0.0%
45


FS-3
105
4
VH4-11-2
0
0.0%
86


FS-5
111
4
VH4-11-2
0
0.0%
86


FS-7
107
4
VH4-11-2
0
0.0%
86


FS-8
110
4
VH4-11-2
0
0.0%
86


PR-TS2
105
4
VH4-11-2
0
0.0%
85


RF-TMC
102
4
VH4-11-2
0
0.0%
85


mAb216
122
4
VH4-11-2
1
1.0%
15


mAb410.7.F91
122
4
VH4-11-2
1
1.0%
52


mAbA6H4C5
124
4
VH4-11-2
1
1.0%
15


Ab44
127
4
VH4-11-2
2
2.1%
100


6H-3C4
124
4
VH4-11-2
3
3.1%
59


FS-6
108
4
VH4-11-2
6
6.2%
86


FS-2
114
4
VH4-11-2
6
6.2%
84


HIG1
126
4
VH4-11-2
7
7.2%
62


FS-4
105
4
VH4-11-2
8
8.2%
86


SA-4A
123
4
VH4-11-2
9
9.3%
125


LES-C
119
4
VH4-11-2
10
10.3%
99


DI
78
4
VH4-11-9
16
16.5%
58


Ab26
126
4
VH4-31-4
8
8.1%
100


TS2
124
4
VH4-31-12
15
15.2%
110


265-695
115
4
VH4-11-7
16
16.5%
5


WAH
129
4
VH4-31-13
19
19.2%
93


268-D
122
4
VH4-11-8
22
22.7%
6


58P2
118
4
VH4-11-8
0
0.0%
104


mAb67
128
4
VH4-21-4
1
1.0%
45


4.L39
115
4
VH4-11-8
2
2.1%
108


mF7
111
4
VH4-31-13
3
3.0%
75


33.C9
122
4
VH4-21-5
7
7.1%
129


Pag-1
124
4
VH4-11-16
5
5.2%
50


B3
123
4
VH4-21-3
8
8.2%
53


IC4
120
4
VH4-11-8
6
6.2%
70


C6B2
127
4
VH4-31-12
4
4.0%
48


N78
118
4
VH4-11-9
11
11.3%
77


B2
109
4
VH4-11-8
12
12.4%
53


WRD2
123
4
VH4-11-12
6
6.2%
90


mAb426.4.2F20
126
4
VH4-11-8
2
2.1%
52


E54 4.58
115
4
VH4-11-8
1
1.0%
26


WRD6
123
4
VH4-11-12
10
10.3%
90


mAb426.12.3F1.4
122
4
VH4-11-9
4
4.1%
52


E54 4.2
108
4
VH4-21-6
2
2.0%
26


WIL
127
4
VH4-31-13
0
0.0%
90


COF
126
4
VH4-31-13
0
0.0%
90


LAR
122
4
VH4-31-13
2
2.0%
90


WAT
125
4
VH4-31-13
4
4.0%
90


mAb61
123
4
VH4-31-13
5
5.1%
45


WAG
127
4
VH4-31-4
0
0.0%
90


RF-SJ4
108
4
VH4-31-12
2
2.0%
85


E54 4.4
110
4
VH4-11-7
0
0.0%
26


E55 4.A1
108
4
VH4-11-7
0
0.0%
26


PR-SJ1
103
4
VH4-11-7
1
1.0%
85


E54 4.23
111
4
VH4-11-7
1
1.0%
26


CLL7 7-2
97
4
VH4-11-12
0
0.0%
29


37P1
95
4
VH4-11-12
0
0.0%
104


ALL52 30-2
91
4
VH4-31-12
4
4.0%
29


EBV-21
98
5
VH5-12-1
0
0.0%
13


CB-4
98
5
VH5-12-1
0
0.0%
13


CLL-12
98
5
VH5-12-1
0
0.0%
13


L3-4
98
5
VH5-12-1
0
0.0%
13


CLL11
98
5
VH5-12-1
0
0.0%
17


CORD3
98
5
VH5-12-1
0
0.0%
17


CORD4
98
5
VH5-12-1
0
0.0%
17


CORD8
98
5
VH5-12-1
0
0.0%
17


CORD9
98
5
VH5-12-1
0
0.0%
17


CD+1
98
5
VH5-12-1
0
0.0%
17


CD+3
98
5
VH5-12-1
0
0.0%
17


CD+4
98
5
VH5-12-1
0
0.0%
17


CD−1
98
5
VH5-12-1
0
0.0%
17


CD−5
98
5
VH5-12-1
0
0.0%
17


VERG14
98
5
VH5-12-1
0
0.0%
17


PBL1
98
5
VH5-12-1
0
0.0%
17


PBL10
98
5
VH5-12-1
0
0.0%
17


STRAb SA-1A
127
5
VH5-12-1
0
0.0%
125


DOB′
122
5
VH5-12-1
0
0.0%
97


VERG5
98
5
VH5-12-1
0
0.0%
17


PBL2
98
5
VH5-12-1
1
1.0%
17


Tu16
119
5
VH5-12-1
1
1.0%
49


PBL12
98
5
VH5-12-1
1
1.0%
17


CD+2
98
5
VH5-12-1
1
1.0%
17


CORD10
98
5
VH5-12-1
1
1.0%
17


PBL9
98
5
VH5-12-1
1
1.0%
17


CORD2
98
5
VH5-12-1
2
2.0%
17


PBL6
98
5
VH5-12-1
2
2.0%
17


CORD5
98
5
VH5-12-1
2
2.0%
17


CD−2
98
5
VH5-12-1
2
2.0%
17


CORD1
98
5
VH5-12-1
2
2.0%
17


CD−3
98
5
VH5-12-1
3
3.1%
17


VERG4
98
5
VH5-12-1
3
3.1%
17


PBL13
98
5
VH5-12-1
3
3.1%
17


PBL7
98
5
VH5-12-1
3
3.1%
17


HAN
119
5
VH5-12-1
3
3.1%
97


VERG3
98
5
VH5-12-1
3
3.1%
17


PBL3
98
5
VH5-12-1
3
3.1%
17


VERG7
98
5
VH5-12-1
3
3.1%
17


PBL5
94
5
VH5-12-1
0
0.0%
17


CD−4
98
5
VH5-12-1
4
4.1%
17


CLL10
98
5
VH5-12-1
4
4.1%
17


PBL11
98
5
VH5-12-1
4
4.1%
17


CORD6
98
5
VH5-12-1
4
4.1%
17


VERG2
98
5
VH5-12-1
5
5.1%
17


83P2
119
5
VH5-12-1
0
0.0%
103


VERG9
98
5
VH5-12-1
6
6.1%
17


CLL6
98
5
VH5-12-1
6
6.1%
17


PBL8
98
5
VH5-12-1
7
7.1%
17


Ab2022
120
5
VH5-12-1
3
3.1%
100


CAV
127
5
VH5-12-4
0
0.0%
97


HOW′
120
5
VH5-12-4
0
0.0%
97


PET
127
5
VH5-12-4
0
0.0%
97


ANG
121
5
VH5-12-4
0
0.0%
97


KER
121
5
VH5-12-4
0
0.0%
97


5.M13
118
5
VH5-12-4
0
0.0%
107


Au2.1
118
5
VH5-12-4
1
1.0%
49


WS1
126
5
VH5-12-1
9
9.2%
110


TD Vn
98
5
VH5-12-4
1
1.0%
16


TEL13
116
5
VH5-12-1
9
9.2%
73


E55 5.237
112
5
VH5-12-4
2
2.0%
26


VERG1
98
5
VH5-12-1
10
10.2%
17


CD4-74
117
5
VH5-12-1
10
10.2%
42


257-D
125
5
VH5-12-1
11
11.2%
6


CLL4
98
5
VH5-12-1
11
11.2%
17


CLL8
98
5
VH5-12-1
11
11.2%
17


Ab2
124
5
VH5-12-1
12
12.2%
120


Vh383ex
98
5
VH5-12-1
12
12.2%
120


CLL3
98
5
VH5-12-2
11
11.2%
17


Au59.1
122
5
VH5-12-1
12
12.2%
49


TEL16
117
5
VH5-12-1
12
12.2%
73


M61
104
5
VH5-12-1
0
0.0%
103


Tu0
99
5
VH5-12-1
5
5.1%
49


P2-51
122
5
VH5-12-1
13
13.3%
121


P2-54
122
5
VH5-12-1
11
11.2%
121


P1-56
119
5
VH5-12-1
9
9.2%
121


P2-53
122
5
VH5-12-1
10
10.2%
121


P1-51
123
5
VH5-12-1
19
19.4%
121


P1-54
123
5
VH5-12-1
3
3.1%
121


P3-69
127
5
VH5-12-1
4
4.1%
121


P3-9
119
5
VH5-12-1
4
4.1%
121


1-185-37
125
5
VH5-12-4
0
0.0%
124


1-187-29
125
5
VH5-12-4
0
0.0%
124


P1-58
128
5
VH5-12-4
10
10.2%
121


P2-57
118
5
VH5-12-4
3
3.1%
121


P2-55
123
5
VH5-12-1
5
5.1%
121


P2-56
123
5
VH5-12-1
20
20.4%
121


P2-52
122
5
VH5-12-1
11
11.2%
121


P3-60
122
5
VH5-12-1
8
8.2%
121


P1-57
123
5
VH5-12-1
4
4.1%
121


P1-55
122
5
VH5-12-1
14
14.3%
121


MD3-4
128
5
VH5-12-4
12
12.2%
5


P1-52
121
5
VH5-12-1
11
11.2%
121


CLL5
98
5
VH5-12-1
13
13.3%
17


CLL7
98
5
VH5-12-1
14
14.3%
17


L2F10
100
5
VH5-12-1
1
1.0%
46


L3B6
98
5
VH5-12-1
1
1.0%
46


VH6.A12
119
6
VH6-35-1
13
12.9%
122


s5A9
102
6
VH6-35-1
1
1.0%
46


s6G4
99
6
VH6-35-1
1
1.0%
46


ss3
99
6
VH6-35-1
1
1.0%
46


6-1G1
101
6
VH6-35-1
0
0.0%
14


F19L16
107
6
VH6-35-1
0
0.0%
68


L16
120
6
VH6-35-1
0
0.0%
69


M71
121
6
VH6-35-1
0
0.0%
103


ML1
120
6
VH6-35-1
0
0.0%
69


F19ML1
107
6
VH6-35-1
0
0.0%
68


15P1
127
6
VH6-35-1
0
0.0%
104


VH6.N1
121
6
VH6-35-1
0
0.0%
122


VH6.N11
123
6
VH6-35-1
0
0.0%
122


VH6.N12
123
6
VH6-35-1
0
0.0%
122


VH6.N2
125
6
VH6-35-1
0
0.0%
122


VH6.N5
125
6
VH6-35-1
0
0.0%
122


VH6.N6
127
6
VH6-35-1
0
0.0%
122


VH6.N7
126
6
VH6-35-1
0
0.0%
122


VH6.N8
123
6
VH6-35-1
0
0.0%
122


VH6.N9
123
6
VH6-35-1
0
0.0%
122


VH6.N10
123
6
VH6-35-1
0
0.0%
122


VH6.A3
123
6
VH6-35-1
0
0.0%
122


VH6.A1
124
6
VH6-35-1
0
0.0%
122


VH6.A4
120
6
VH6-35-1
0
0.0%
122


E55 6.16
116
6
VH6-35-1
0
0.0%
26


E55 6.17
120
6
VH6-35-1
0
0.0%
26


E55 6.6
120
6
VH6-35-1
0
0.0%
26


VHGL 6.3
102
6
VH6-35-1
0
0.0%
26


CB-201
118
6
VH6-35-1
0
0.0%
109


VH6.N4
122
6
VH6-35-1
0
0.0%
122


E54 6.4
109
6
VH6-35-1
1
1.0%
26


VH6.A6
126
6
VH6-35-1
1
1.0%
122


E55 6.14
120
6
VH6-35-1
1
1.0%
26


E54 6.6
107
6
VH6-35-1
1
1.0%
26


E55 6.10
112
6
VH6-35-1
1
1.0%
26


E54 6.1
107
6
VH6-35-1
2
2.0%
26


E55 6.13
120
6
VH6-35-1
2
2.0%
26


E55 6.3
120
6
VH6-35-1
2
2.0%
26


E55 6.7
116
6
VH6-35-1
2
2.0%
26


E55 6.2
120
6
VH6-35-1
2
2.0%
26


E55 6.X
111
6
VH6-35-1
2
2.0%
26


E55 6.11
111
6
VH6-35-1
3
3.0%
26


VH6.A11
118
6
VH6-35-1
3
3.0%
122


A10
107
6
VH6-35-1
3
3.0%
68


E55 6.1
120
6
VH6-35-1
4
4.0%
26


FK-001
124
6
VH6-35-1
4
4.0%
65


VH6.A5
121
6
VH6-35-1
4
4.0%
122


VH6.A7
123
6
VH6-35-1
4
4.0%
122


HBp2
119
6
VH6-35-1
4
4.0%
4


Au46.2
123
6
VH6-35-1
5
5.0%
49


A431
106
6
VH6-35-1
5
5.0%
68


VH6.A2
120
6
VH6-35-1
5
5.0%
122


VH6.A9
125
6
VH6-35-1
8
7.9%
122


VH6.A8
118
6
VH6-35-1
10
9.9%
122


VH6-FF3
118
6
VH6-35-1
2
2.0%
123


VH6.A10
126
6
VH6-35-1
12
11.9%
122


VH6-EB10
117
6
VH6-35-1
3
3.0%
123


VH6-E6
119
6
VH6-35-1
6
5.9%
123


VH6-FE2
121
6
VH6-35-1
6
5.9%
123


VH6-EE6
116
6
VH6-35-1
6
5.9%
123


VH6-FD10
118
6
VH6-35-1
6
5.9%
123


VH6-EX8
113
6
VH6-35-1
6
5.9%
123


VH6-FG9
121
6
VH6-35-1
8
7.9%
123


VH6-E5
116
6
VH6-35-1
9
8.9%
123


VH6-EC8
122
6
VH6-35-1
9
8.9%
123


VH6-E10
120
6
VH6-35-1
10
9.9%
123


VH6-FF11
122
6
VH6-35-1
11
10.9%
123


VH6-FD2
115
6
VH6-35-1
11
10.9%
123


CLL10 17-2
88
6
VH6-35-1
4
4.0%
29


VH6-BB11
94
6
VH6-35-1
4
4.0%
123


VH6-B4I
93
6
VH6-35-1
7
6.9%
123


JU17
102
6
VH6-35-1
3
3.0%
114


VH6-BD9
96
6
VH6-35-1
11
10.9%
123


VH6-BB9
94
6
VH6-35-1
12
11.9%
123
















TABLE 3A







assignment of rearranged V kappa sequences


to their germline counterparts










Family1
Name
Rearranged2
Sum














1
Vk1-1
28




1
Vk1-2
0




1
Vk1-3
1




1
Vk1-4
0




1
Vk1-5
7




1
Vk1-6
0




1
Vk1-7
0




1
Vk1-8
2




1
Vk1-9
9




1
Vk1-10
0




1
Vk1-11
1




1
Vk1-12
7




1
Vk1-13
1




1
Vk1-14
7




1
Vk1-15
2




1
Vk1-16
2




1
Vk1-17
16




1
Vk1-18
1




1
Vk1-19
33




1
Vk1-20
1




1
Vk1-21
1




1
Vk1-22
0




1
Vk1-23
0
119 
entries


2
Vk2-1
0




2
Vk2-2
1




2
Vk2-3
0




2
Vk2-4
0




2
Vk2-5
0




2
Vk2-6
16




2
Vk2-7
0




2
Vk2-8
0




2
Vk2-9
1




2
Vk2-10
0




2
Vk2-11
7




2
Vk2-12
0
25 
entries


3
Vk3-1
1




3
Vk3-2
0




3
Vk3-3
35




3
Vk3-4
115




3
Vk3-5
0




3
Vk3-6
0




3
Vk3-7
1




3
Vk3-8
40
192 
entries


4
Vk4-1
33
33 
entries


5
Vk5-1
1
1 
entry


6
Vk6-1
0




6
Vk6-2
0
0 
entries


7
Vk7-1
0
0 
entries
















TABLE 3B







assignment of rearranged V lambda sequences to their germline


counterparts










Family1
Name
Rearranged2
Sum














1
DPL1
1




1
DPL2
14




1
DPL3
6




1
DPL4
1




1
HUMLV117
4




1
DPL5
13




1
DPL6
0




1
DPL7
0




1
DPL8
3




1
DPL9
0
42 
entries


2
DPL10
5




2
VLAMBDA 2.1
0




2
DPL11
23




2
DPL12
15




2
DPL13
0




2
DPL14
0
43 
entries


3
DPL16
10




3
DPL23
19




3
Humlv318
9
38 
entries


7
DPL18
1




7
DPL19
0
1 
entries


8
DPL21
2




8
HUMLV801
6
8 
entries


9
DPL22
0
0 
entries


unassigned
DPL24
0
0 
entries


10 
gVLX-4.4
0
0 
entries
















TABLE 3C







assignment of rearranged V heavy chain sequences to their germline


counterparts










Family1
Name
Rearranged2
Sum














1
VH1-12-1
38




1
VH1-12-8
2




1
VH1-12-2
2




1
VH1-12-9
2




1
VH1-12-3
0




1
VH1-12-4
0




1
VH1-12-5
3




1
VH1-12-6
0




1
VH1-12-7
23




1
VH1-13-1
1




1
VH1-13-2
1




1
VH1-13-3
0




1
VH1-13-4
0




1
VH1-13-5
0




1
VH1-13-6
17




1
VH1-13-7
0




1
VH1-13-8
3




1
VH1-13-9
0




1
VH1-13-10
0




1
VH1-13-11
0




1
VH1-13-12
10




1
VH1-13-13
0




1
VH1-13-14
0




1
VH1-13-15
4




1
VH1-13-16
2




1
VH1-13-17
0




1
VH1-13-18
1




1
VH1-13-19
0




1
VH1-1X-1
1
110 
entries


2
VH2-21-1
0




2
VH2-31-1
0




2
VH2-31-2
1




2
VH2-31-3
1




2
VH2-31-4
0




2
VH2-31-5
2




2
VH2-31-6
0




2
VH2-31-7
0




2
VH2-31-14
1




2
VH2-31-8
0




2
VH2-31-9
0




2
VH2-31-10
0




2
VH2-31-11
1




2
VH2-31-12
0




2
VH2-31-13
1
7 
entries


3
VH3-11-1
0




3
VH3-11-2
0




3
VH3-11-3
5




3
VH3-11-4
0




3
VH3-11-5
1




3
VH3-11-6
1




3
VH3-11-7
0




3
VH3-11-8
5




3
VH3-13-1
9




3
VH3-13-2
3




3
VH3-13-3
0




3
VH3-13-4
0




3
VH3-13-5
0




3
VH3-13-6
0




3
VH3-13-7
32




3
VH3-13-8
4




3
VH3-13-9
0




3
VH3-13-10
46




3
VH3-13-11
0




3
VH3-13-12
11




3
VH3-13-13
17




3
VH3-13-14
8




3
VH3-13-15
4




3
VH3-13-16
3




3
VH3-13-17
2




3
VH3-13-18
1




3
VH3-13-19
13




3
VH3-13-20
1




3
VH3-13-21
1




3
VH3-13-22
0




3
VH3-13-23
0




3
VH3-13-24
4




3
VH3-13-25
1




3
VH3-13-26
6




3
VH3-14-1
1




3
VH3-14-4
15




3
VH3-14-2
0




3
VH3-14-3
0




3
VH3-1X-1
0




3
VH3-1X-2
0




3
VH3-1X-3
6




3
VH3-1X-4
0




3
VH3-1X-5
0




3
VH3-1X-6
11




3
VH3-1X-7
0




3
VH3-1X-8
1




3
VH3-1X-9
0
212 
entries


4
VH4-11-1
0




4
VH4-11-2
20




4
VH4-11-3
0




4
VH4-11-4
0




4
VH4-11-5
0




4
VH4-11-6
0




4
VH4-11-7
5




4
VH4-11-8
7




4
VH4-11-9
3




4
VH4-11-10
0




4
VH4-11-11
0




4
VH4-11-12
4




4
VH4-11-13
0




4
VH4-11-14
0




4
VH4-11-15
0




4
VH4-11-16
1




4
VH4-21-1
0




4
VH4-21-2
0




4
VH4-21-3
1




4
VH4-21-4
1




4
VH4-21-5
1




4
VH4-21-6
1




4
VH4-21-7
0




4
VH4-21-8
0




4
VH4-21-9
0




4
VH4-31-1
0




4
VH4-31-2
0




4
VH4-31-3
0




4
VH4-31-4
2




4
VH4-31-5
0




4
VH4-31-6
0




4
VH4-31-7
0




4
VH4-31-8
0




4
VH4-31-9
0




4
VH4-31-10
0




4
VH4-31-11
0




4
VH4-31-12
4




4
VH4-31-13
7




4
VH4-31-14
0




4
VH4-31-15
0




4
VH4-31-16
0




4
VH4-31-17
0




4
VH4-31-18
0




4
VH4-31-19
0




4
VH4-31-20
0
57 
entries


5
VH5-12-1
82




5
VH5-12-2
1




5
VH5-12-3
0




5
VH5-12-4
14
97 
entries


6
VH6-35-1
74
74 
entries
















TABLE 4A





Analysis of V kappa subgroup 1



























 














 














 














 














 














 














 




























TABLE 4B





Analysis of V kappa subgroup 2



























 














 














 














 














 




























TABLE 4C





Analysis of V kappa subgroup 3



























 














 














 














 














 














 














 




























TABLE 4D





Analysis of V kappa subgroup 4































 

















 

















 

















 

















 

















 































TABLE 5A





Analysis of V lambda subgroup 1



























 














 














 














 














 














 




























TABLE 5B





Analysis of V lambda subgroup 2



























 














 














 














 














 














 




























TABLE 5C





Analysis of V lambda subgroup 3



























 














 














 














 














 














 




























TABLE 6A





Analysis of V heavy chain subgroup 1A



























 














 














 














 














 














 




























TABLE 6B





Analysis of V heavy chain subgroup 1B



























 














 














 














 














 














 




























TABLE 6C





Analysis of V heavy chain subgroup 2



























 














 














 














 














 














 




























TABLE 6D





Analysis of V heavy chain subgroup 3



























 














 














 














 














 














 














 














 




























TABLE 6E





Analysis of V heavy chain subgroup 4



























 














 














 














 














 














 





































TABLE 6F





Analysis of V heavy chain subgroup 5



























 














 














 














 














 














 





































TABLE 6G





Analysis of V heavy chain subgroup 6



























 














 














 














 














 














 






























APPENDIX TO TABLES 1A-C
A. References of Rearranged Sequences
References of Rearranged Human Kappa Sequences Used for Alignment

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    119 Victor, K. D., Pascual, V., Lefvert, A. K. & Capra, J. D. (1992) Mol. Immunol., 29, 1501-1506.
    120 Victor, K. D., Pascual, V., Williams, C. L. Lennon, V. A. & Capra, J. D. (1992) Eur. J. Immunol., 22, 2231-2236.
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    125 Weng, N.-P., Yu-Lee, L.-Y., Sanz, I., Patten, B. M. & Marcus, D. M. (1992) J. Immunol., 149, 2518-2529.
    126 Winkler, T. H., Fehr, H. & Kalden, J. R. (1992) Eur. J. Immunol., 22, 1719-1728.


References of Rearranged Human Lambda Sequences Used for Alignment

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    7 Bhat, M. M., Bieber, M. M., Chapman, C. J., Stevenson, F. K. & Teng, N. N. H. (1993) J. Immunol., 151, 5011-5021.
    8 Cairns, E., Kwong, P. C., Misener, V., Ip, P., Bell, D. A. & Siminovitch, K. A. (1989) J. Immunol., 143, 685-691.
    9 Carroll, W. L., Yu, M., Link, M. P. & Korsmeyer, S. J. (1989) J. Immunol., 143, 692-698.
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    27 Griffiths, A. D., Malmqvist, M., Marks, J. D., Bye, J. M., Embleton, M. J., Mccafferty, J., Baier, M., Holliger, K. P., Gorick, B. D., Hughes-Jones, N. C., Hoogenboom, H. R. & Winter, G. (1993) Embo J., 12, 725-734.
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    51 Milstein, C., Clegg, J. B. & Jarvis, J. M. (1968) Biochem. J., 110, 631-652.
    52 Moran, M. J., Andris, J. S., Matsumato, Y.-I., Capra, J. D. & Hersh, E. M. (1993) Mol. Immunol., 30, 1543-1551.
    53 Nabeshima, Y. & Ikenaka, T. (1979) Mol. Immunol., 16, 439-444.
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    59 Ponstingl, H., Hess, M. & Hilschmann, N. (1968) Z. Physiol. Chem., 349, 867-871; (1971) Z. Physiol. Chem., 352, 247-266.
    60 Randen, I., Pascual, V., Victor, K., Thompson, K. M., Forre, O., Capra, J. D. & Narvig, J. B. (1993) Eur. J. Immunol., 23, 1220-1225.
    61 Scholz, R. & Hilschmann, N. (1975) Z. Physiol. Chem., 356, 1333-1335.
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    64 Sletten, K., Husby, G. & Natvig, J. B. (1974) Scand. J. Immunol., 3, 833-836.; Sletten, K., Natvig, J. B., Husby, G. & Juul, J. (1981) Biochem. J., 195, 561-572.
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    66 Takahashi, N., Takayasu, T., Isobe, T., Shinoda, T., Okuyama, T. & Shimizu, A. (1979) J. Biochem., 86, 1523-1535.
    67 Takahashi, N., Takayasu, T., Shinoda, T., Ito, S., Okuyama, T. & Shimizu, A. (1980) Biomed. Res., 1, 321-333.
    68 Takahashi, Y., Takahashi, N., Tetaert, D. & Putnam, F. W. (1983) Proc. Nat. Acad. Sci. Usa, 80, 3686-3690.
    69 Takayasu, T., Takahashi, N., Shinoda, T., Okuyama, T. & Tomioka, H. (1980) J. Biochem., 89, 421-436.
    70 Titani, K., Wikler, M., Shinoda, T. & Putnam, F. W. (1970) J. Biol. Chem., 245, 2171-2176.
    71 Toft, K. G., Sletten, K. & Husby, G. (1985) Biol. Chem. Hoppe-Seyler, 366, 617-625.
    72 Tonoike, H., Kametani, F., Hoshi, A., Shinoda, T. & Isobe, T. (1985) Biochem. Biophys. Res. Commun., 126, 1228-1234.
    73 Tonoike, H., Kametani, F., Hoshi, A., Shinoda, T. & Isobe, T. (1985) Febs Letters, 185, 139-141.
    74 Tsujimoto, Y. & Croce, C. M. (1984) Nucl. Acids Res., 12, 8407-8414.
    75 Tsunetsugu-Yokota. Y., Minekawa, T., Shigemoto, K., Shirasawa, T. & Takemori, T. (1992) Mol. Immunol., 29, 723-728.
    76 Tveteraas, T., Sletten, K. & Westermark. P. (1985) Biochem. J., 232, 183-190.
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    79 Weng, N.-P., Yu-Lee, L.-Y., Sanz, I., Patten, B. M. & Marcus, D. M. (1992) J. Immunol., 149, 2518-2529.
    80 Wikler, M. & Putnam, F. W. (1970) J. Biol. Chem., 245, 4488-4507.
    81 Winkler, T. H., Fehr, H. & Kalden, J. R. (1992) Eur. J. Immunol., 22, 1719-1728.
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References of Rearranged Human Heavy Chain Sequences Used for Alignment

    1 Adderson, E. E., Azmi, F. H., Wilson, P. M., Shackelford, P. G. & Carroll, W. L. (1993) J. Immunol., 151, 800-809.
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    9 Avila, M. A., Vazques. J., Danielsson, L., Fernandez De Cossio, M. E. & Borrebaeck, C. A. K. (1993) Gene, 127, 273-274.
    10 Bakkus, M. H. C., Heirman, C., Van Riet, I., Van Camp, B. & Thielemans. K. (1992) Blood, 80, 2326-2335.
    11 Barbas Iii, C. F., Crowe, Jr., J. E., Cababa, D., Jones, T. M., Zebedee, S. L., Murphy, B. R., Chanock, R. M. & Burton. D. R. (1992) Proc. Natl. Acad. Sci. Usa, 89, 10164-10168.
    12 Barbas, C. F., Iii, Collet, T. A., Amberg, W., Roben, P., Binley, J. M., Hoekstra, D., Cababa, D., Jones, T. M., Williamson, R. A., Pilkington, G. R., Haigwood, N. L., Cabezas, E., Satterthwait, A. C., Sanz, I. & Burton, D. R. (1993) J. Mol. Biol., 230, 812-823.
    13 Berman, J. E., Humphries, C. G., Barth, J., Alt, F. W. & Tucker, P. W. (1991) J. Exp. Med., 173, 1529-1535.
    14 Berman, J. E., Mellis, S. J., Pollock, R., Smith, C. L., Suh, H., Heinke, B., Kowal, C., Surti, U., Chess, L., Cantor, C. R. & Alt, F. W. (1988) Embo J., 7, 727-738.
    15 Bhat, N. M., Bieber, M. M., Chapman, C. J., Stevenson, F. K. & Teng, N. N. H. (1993) J. Immunol., 151, 5011-5021.
    16 Bird, J., Galili, N., Link, M., Stites, D. & Sklar, J. (1988) J. Exp. Med., 168, 229-245.
    17 Cai, J., Humphries, C., Richardson, A. & Tucker, P. W. (1992) J. Exp. Med., 176, 1073-1081.
    18 Cairns, E., Kwong, P. C., Misener, V., Ip, P., Bell, D. A. & Siminovitch, K. A. (1989) J. Immunol., 143, 685-691.
    19 Capra, J. D. & Hopper, J. E. (1976) Immunochemistry, 13, 995-999; Hopper, J. E., Noyes, C., Heinrikson, R. & Kessel, J. W. (1976) J. Immunol., 116, 743-746.
    20 Capra, J. D. & Kehoe, J. M. (1974) Proc. Nat. Acad. Sci. Usa, 71, 845-848.
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    23 Chiu, Y. Y. H., Lopez De Castro, J. A. & Poljak, R. J. (1979) Biochemistry, 18, 553-560.
    24 Cleary, M. L., Meeker, T. C., Levy, S., Lee, E., Trela, M., Sklar, J. & Levy, R. (1986) Cell, 44, 97-106.
    25 Cuisinier, A.-M., Fumoux, F., Fougereau, M. & Tonnelle, C. (1992) Mol. Immunol., 29, 1363-1373.
    26 Cuisinier, A.-M., Gauthier, L., Boubli, L., Fougereau, M. & Tonnelle, C. (1993) Eur. J. Immunol., 23, 110-118.
    27 Cunningham, B. A., Gottlieb. P. D., Pflumm, M. N. & Edelman, G. M. (1971) Progress In Immunology (B. Amos, Ed.), Academic Press, N.Y., Pp. 3-24.
    28 Cunningham. B. A., Rutishauser, U., Gall, W. E., Gottlieb, P. D., Waxdal, M. J. & Edelman, G. M. (1970) Biochemistry, 9, 3161-3170.
    29 Deane, M. & Norton, J. D. (1990) Eur. J. Immunol., 20, 2209-2217.
    30 Deane, M. & Norton, J. D. (1991) Leukemia, 5, 646-650.
    31 Dersimonian, H., Schwartz. R. S., Barrett, K. J. & Stollar, B. D. (1987) J. Immunol., 139, 2496-2501.
    32 Dersimonian, H., Schwartz, R. S., Barrett, K. J. & Stollar, B. D. (1987) J. Immunol., 139, 2496-2501; Chen, P. P., Liu, M.-F., Sinha, S. & Carson, D. A. (1988) Arth. Rheum., 31, 1429-1431.
    33 Desai, R., Spatz, L., Matsuda, T., Ilyas, A. A., Berman, J. E., Alt, F. W., Kabat, E. A. & Latov, N. (1990) J. Neuroimmunol., 26, 35-41.
    34 Ezaki, I., Kanda, H., Sakai, K., Fukui, N., Shingu, M., Nobunaga, M. & Watanabe, T. (1991) Arthritis And Rheumatism, 34, 343-350.
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    38 Gawinowicz, M. A., Merlini, G., Birken, S., Osserman, E. F. & Kabat, E. A. (1991) J. Immunol., 147, 915-920.
    39 Gillies, S. D., Dorai, H., Wesolowski, J., Majeau, G., Young, D., Boyd, J., Gardner, J. & James, K. (1989) Bio/Tech., 7, 799-804.
    40 Goni, F. & Frangione, B. (1983) Proc. Nat. Acad. Sci. Usa, 80, 4837-4841.
    41 Gorman, S. D., Clark, M. R., Routledge, E. G., Cobbold, S. P. & Waldmann, H. (1991) Proc. Natl. Acad. Sci. Usa, 88, 4181-4185.
    42 Griffiths, A. D., Malmqvist, M., Marks, J. D., Bye, J. M., Embleton, M. J., Mccafferty, J., Baier, M., Holliger, K. P., Gorick, B. D., Hughes-Jones, N. C., Hoogenboom, H. R. & Winter, G. (1993) Embo J., 12, 725-734.
    43 Grillot-Courvalin, C., Brouet, J.-C., Piller, F., Rassenti, L. Z., Labaume, S., Silverman, G. J., Silberstein, L. & Kipps, T. J. (1992) Eur. J. Immunol., 22, 1781-1788.
    44 Guillaume, T., Rubinstein, D. B., Young, F., Tucker, L., Logtenberg, T., Schwartz, R. S. & Barrett, K. L. (1990) J. Immunol., 145, 1934-1945; Young, F., Tucker, L., Rubinstein, D., Guillaume, T., Andre-Schwartz, J., Barrett, K. J., Schwartz, R. S. & Logtenberg, T. (1990)
    45 Harindranath, N., Goldfarb, I. S., Ikematsu, H., Burastero, S. E., Wilder, R. L., Notkins, A., & Casali, P. (1991) Int. Immunol., 3, 865-875.
    46 Hillson, J. L., Oppliger, I. R., Sasso, E. H., Milner, E. C. B. & Wener, M. H. (1992) J. Immunol., 149, 3741-3752.
    47 Hirabayashi. Y., Munakata, Y., Sasaki, T. & Sano, H. (1992) Nucl. Acids Res., 20, 2601.
    48 Hoch, S. & Schwaber, J. (1987) J. Immunol., 139, 1689-1693.
    49 Huang, C., Stewart, A. K., Schwartz, R. S. & Stollar, B. D. (1992) J. Clin. Invest., 89, 1331-1343.
    50 Hughes-Jones, N. C., Bye. J. M., Beale, D. & Coadwell, J. (1990) Biochem. J., 268, 135-140.
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B. References of Germline Sequences
References of Human Germline Kappa Sequences

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References of Human Germline Lambda Sequences

    1 Williams, S. C. & Winter, G. (1993) Eur. J. Immunol., 23, 1456-1461.
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References of Human Germline Heavy Chain Sequences

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    13 Matsuda, F., Shin, E. K., Hirabayashi, Y., Nagaoka, H., Yoshida, M. C. Zong, S. Q. & Honjo, T. (1990) Embo J., 9, 2501-2506.
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    15 Nagaoka, H., Ozawa, K., Matsuda, F., Hayashida, H., Matsumura, R., Haino, M., Shin, E. K., Fukita, Y., Imai, T., Anand, R., Yokoyama, K., Eki, T., Soeda, E. & Honjo, T. (1993). (Temporal)
    16 Rechavi, G., Bienz, B., Ram, D., Ben-Neriah, Y., Cohen, J. B., Zakut. R. & Givol, D. (1982) Proc. Nat. Acad. Sci. Usa, 79, 4405-4409.
    17 Sanz, I., Kelly, P., Williams, C., Scholl, S., Tucker, P. & Capra, J. D. (1989) Embo J., 8, 3741-3748.
    18 Shin, E. K., Matsuda, F., Fujikura, J., Akamizu. T., Sugawa, H., Mori, T. & Honjo, T. (1993) Eur. J. Immunol., 23, 2365-2367.
    19 Tomlinson, Im., Walter, G., Marks, Jd., Llewelyn, Mb. & Winter. G. (1992) J. Mol. Biol. 227, 776-798.
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    21 Van Dijk, K. W., Mortari, F., Kirkham, P. M., Schroeder, Jr., H. W. & Milner, E. C. B. (1993) Eur. J. Immunol., 23, 832-839.
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    23 Weng, N.-P., Snyder, J. G., Yu-Lee, L.-Y. & Marcus, D. M. (1992) Eur. J. Immunol., 22, 1075-1082.
    24 Winkler, T. H., Fehr, H. & Kalden, J. R. (1992) Eur. J. Immunol., 22, 1719-1728.
    25 Olee, T., Yang, P. M., Siminovitch, K. A., Olsen, N. J., Hillson, J. L., Wu, J., Kozin, F., Carson, D. A. E. Chen, P. P. (1991) J. Clin. Invest. 88, 193-203.
    26 Chen, P. P. & Yang, P. M. (1990) Scand. J. Immunol. 31, 593-599.
    27 Tomlinson, M., Walter, G., Cook & Winter, G. (Unpublished)

## Claims

1. A method of identifying at least one gene encoding one or more human antibodies or antibody fragments having an optimized affinity, comprising the steps of:
(a) expressing in a host cell a collection of genes encoding human antibodies or antibody fragments from a first library of genes, wherein said first library of genes comprises nucleic acids encoding a plurality of human VH and VL amino acid sequences, wherein each of said VH and VL amino acid sequences comprises four human consensus sequence framework regions interspaced by three complementary determining regions CDR1, CDR2, and CDR3, and wherein each of said nucleic acids encoding said VH and VL amino acid sequences contains DNA cleavage sites at the boundary between each consensus framework region and CDR region, wherein each of said cleavage sites is unique within said nucleic acid and is common to all nucleic acid sequences of said library at corresponding positions, wherein said first library of genes comprises nucleic acids encoding the human consensus sequence framework regions selected from the group consisting of VH1A (SEQ ID NO:56), VH1B (SEQ ID NO: 58), VH2 (SEQ ID NO: 60), VH3 (SEQ ID NO: 62), VH4 (SEQ ID NO: 64), VH5 (SEQ ID NO: 66), and VH6 (SEQ ID NO: 68);
(b) isolating a plurality of human antibodies or antibody fragments that specifically bind an antigen by screening said collection of antibodies or antibody fragments against said antigen;
(c) obtaining the genes encoding said plurality of human antibodies or antibody fragments isolated in step (b);
(d) replacing one or more sub-sequences encoding a complementarity determining region of each of said genes obtained in step (c) with a pre-built library of compatible sub-sequences encoding complementarity determining regions to prepare a second library of genes, wherein said replacing step is carried out without determining the sequences of the nucleic acids obtained in step (c);
(e) expressing in a host cell a collection of human antibodies or antibody fragments from said second, library of genes and screening said collection of human antibodies or antibody fragments against said antigen;
(f) identifying one or more antibodies or antibody fragments that specifically bind said antigen and that have an optimized affinity compared to the antibodies or antibody fragments identified in step (b).

2. The method according to claim 1, wherein said at least one CDR is a VH or VL CDR1.

3. The method according to claim 1, wherein said at least one CDR is a VH or VL CDR2.

4. The method according to claim 1, wherein said at least one CDR is a VH or VL CDR3.

5. The method according to claim 1, wherein said first library of genes comprises nucleic acids encoding the human consensus sequence framework regions selected from the group consisting of VK1 (SEQ ID NO:42), VK2 (SEQ ID NO: 44), VK3 (SEQ ID NO: 46), and VK4 (SEQ ID NO: 48).

6. The method according to claim 1, wherein said first library of genes comprises nucleic acids encoding, the human consensus sequence framework regions selected from the group consisting of Vλ1 (SEQ ID NO:50), Vλ2 (SEQ ID NO: 52), and Vλ3 (SEQ ID NO: 54).

7. The method according to claim 1, wherein the nucleic acid sequences in said first library of genes that encode said human antibodies or antibody fragments are adapted to the codon usage of said host cell.

8. The method according to claim 1, wherein said host cell is E coli.