COP9 signalosome complex subunit 3 is a protein that in humans is encoded by the COPS3gene.[1][2][3] It encodes a subunit of the COP9 signalosome.
The protein encoded by this gene possesses kinase activity that phosphorylates regulators involved in signal transduction. It phosphorylates I-kappa-B-alpha, p105, and c-Jun. It acts as a docking site for complex-mediated phosphorylation. The gene is located within the Smith-Magenis syndrome region on chromosome 17.[3]
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Wei N, Tsuge T, Serino G, et al. (1998). "The COP9 complex is conserved between plants and mammals and is related to the 26S proteasome regulatory complex". Curr. Biol. 8 (16): 919–22. doi:10.1016/S0960-9822(07)00372-7. PMID9707402.
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Tsuge T, Matsui M, Wei N (2001). "The subunit 1 of the COP9 signalosome suppresses gene expression through its N-terminal domain and incorporates into the complex through the PCI domain". J. Mol. Biol. 305 (1): 1–9. doi:10.1006/jmbi.2000.4288. PMID11114242.
Lyapina S, Cope G, Shevchenko A, et al. (2001). "Promotion of NEDD-CUL1 conjugate cleavage by COP9 signalosome". Science. 292 (5520): 1382–5. doi:10.1126/science.1059780. PMID11337588.
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Petersen HH, Hilpert J, Militz D, et al. (2003). "Functional interaction of megalin with the megalinbinding protein (MegBP), a novel tetratrico peptide repeat-containing adaptor molecule". J. Cell Sci. 116 (Pt 3): 453–61. doi:10.1242/jcs.00243. PMID12508107.
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Groisman R, Polanowska J, Kuraoka I, et al. (2003). "The ubiquitin ligase activity in the DDB2 and CSA complexes is differentially regulated by the COP9 signalosome in response to DNA damage". Cell. 113 (3): 357–67. doi:10.1016/S0092-8674(03)00316-7. PMID12732143.
Henriksen J, Aagesen TH, Maelandsmo GM, et al. (2003). "Amplification and overexpression of COPS3 in osteosarcomas potentially target TP53 for proteasome-mediated degradation". Oncogene. 22 (34): 5358–61. doi:10.1038/sj.onc.1206671. PMID12917637.