Protein: COP9 signalosome complex subunit 5 (SGN5) (Signalosome subunit 5) (EC 3.4.-.-) (Jun activation domain-binding protein 1) (Q92905)
Organism: Homo sapiens (Human)
Function: Probable protease subunit of the COP9 signalosome complex (CSN), a complex involved in various cellular and developmental processes. The CSN complex is an essential regulator of the ubiquitin (Ubl) conjugation pathway by mediating the deneddylation of the cullin subunits of the SCF-type E3 ligase complexes, leading to decrease the Ubl ligase activity of SCF-type complexes such as SCF, CSA or DDB2. The complex is also involved in phosphorylation of p53/TP53, c-jun/JUN, IkappaBalpha/NFKBIA, ITPK1 and IRF8, possibly via its association with CK2 and PKD kinases. CSN-dependent phosphorylation of TP53 and JUN promotes and protects degradation by the Ubl system, respectively. In the complex, it probably acts as the catalytic center that mediates the cleavage of Nedd8 from cullins. It however has no metalloprotease activity by itself and requires the other subunits of the CSN complex. Interacts directly with a large number of proteins that are regulated by the CSN complex, confirming a key role in the complex. Promotes the proteasomal degradation of BRSK2.
Subcellular location: Cytoplasm, cytosol {ECO:0000269|PubMed:17050680, ECO:0000269|PubMed:20978819, ECO:0000269|PubMed:22609399, ECO:0000269|PubMed:9535219}. Nucleus {ECO:0000269|PubMed:17050680, ECO:0000269|PubMed:20978819, ECO:0000269|PubMed:22609399}. Cytoplasm, perinuclear region {ECO:0000269|PubMed:9535219}. Cytoplasmic vesicle, secretory vesicle, synaptic vesicle {ECO:0000269|PubMed:21102408}. Note=Nuclear localization is diminished in the presence of IFIT3. {ECO:0000269|PubMed:17050680}.
InterPro domains:
- IPR000555: JAB1/MPN/MOV34 metalloenzyme domain (domain) [52-191]
- IPR050242: JAMM/MPN+ metalloenzymes, peptidase M67A (family) [43-332]
- IPR037518: MPN domain (domain) [55-192]
- IPR040961: Cop9 signalosome subunit 5 C-terminal domain (domain) [251-329]
Sequence:
MAASGSGMAQKTWELANNMQEAQSIDEIYKYDKKQQQEILAAKPWTKDHHYFKYCKISALALLKMVMHARSGGNLEVMGLMLGKVDGETMIIMDSFALPVEGTETRVNAQAAAYEYMAAYIENAKQVGRLENAIGWYHSHPGYGCWLSGIDVSTQMLNQQFQEPFVAVVIDPTRTISAGKVNLGAFRTYPKGYKPPDEGPSEYQTIPLNKIEDFGVHCKQYYALEVSYFKSSLDRKLLELLWNKYWVNTLSSSSLLTNADYTTGQVFDLSEKLEQSEAQLGRGSFMLGLETHDRKSEDKLAKATRDSCKTTIEAIHGLMSQVIKDKLFNQINIS
Predicted GO terms:
Molecular Function (MF): GO:0003674 (molecular function), GO:0005488 (binding), GO:0098772 (molecular function regulator activity), GO:0003824 (catalytic activity), GO:0030234 (enzyme regulator activity), GO:0140677 (molecular function activator activity), GO:0016787 (hydrolase activity), GO:0044877 (protein-containing complex binding), GO:0140096 (catalytic activity, acting on a protein), GO:0005515 (protein binding), GO:0140678 (molecular function inhibitor activity), GO:0003676 (nucleic acid binding), GO:0070628 (proteasome binding), GO:0008233 (peptidase activity), GO:0061134 (peptidase regulator activity), GO:0004857 (enzyme inhibitor activity), GO:0008047 (enzyme activator activity), GO:0008237 (metallopeptidase activity), GO:0016504 (peptidase activator activity), GO:0061135 (endopeptidase regulator activity), GO:0019783 (ubiquitin-like protein peptidase activity), GO:0101005 (deubiquitinase activity), GO:0140492 (metal-dependent deubiquitinase activity), GO:0061578 (K63-linked deubiquitinase activity)
Biological Process (BP): GO:0008150 (biological process), GO:0065007 (biological regulation), GO:0050789 (regulation of biological process), GO:0019222 (regulation of metabolic process), GO:0050794 (regulation of cellular process), GO:0051726 (regulation of cell cycle), GO:0060255 (regulation of macromolecule metabolic process), GO:0031323 (regulation of cellular metabolic process), GO:0080090 (regulation of primary metabolic process), GO:0009889 (regulation of biosynthetic process), GO:0051171 (regulation of nitrogen compound metabolic process), GO:0019219 (regulation of nucleobase-containing compound metabolic process), GO:0051252 (regulation of RNA metabolic process), GO:0010556 (regulation of macromolecule biosynthetic process), GO:0010468 (regulation of gene expression), GO:0031326 (regulation of cellular biosynthetic process), GO:2001141 (regulation of RNA biosynthetic process), GO:0006355 (regulation of DNA-templated transcription), GO:1903506 (regulation of nucleic acid-templated transcription)
Cellular Component (CC): GO:0005575 (cellular component), GO:0110165 (cellular anatomical entity), GO:0005622 (intracellular anatomical structure), GO:0043226 (organelle), GO:0031974 (membrane-enclosed lumen), GO:0005654 (nucleoplasm), GO:0043229 (intracellular organelle), GO:0043233 (organelle lumen), GO:0043227 (membrane-bounded organelle), GO:0043231 (intracellular membrane-bounded organelle), GO:0070013 (intracellular organelle lumen), GO:0031981 (nuclear lumen), GO:0005634 (nucleus)