COP9 constitutive photomorphogenic homolog subunit 5 (Arabidopsis), also known as COPS5 or Csn5, is a gene conserved from humans to Saccharomyces cerevisiae.[5]
Function
The protein encoded by this gene is one of the eight subunits of COP9 signalosome, a highly conserved protein complex that functions as an important regulator in multiple signaling pathways. The structure and function of COP9 signalosome is similar to that of the 19S regulatory particle of 26S proteasome. COP9 signalosome has been shown to interact with SCF-type E3 ubiquitin ligases and act as a positive regulator of E3 ubiquitin ligases. This protein is reported to be involved in the degradation of cyclin-dependent kinase inhibitor CDKN1B/p27Kip1. It is also known to be a coactivator that increases the specificity of JUN/AP1 transcription factors.[5]
^Kleemann R, Hausser A, Geiger G, Mischke R, Burger-Kentischer A, Flieger O, et al. (November 2000). "Intracellular action of the cytokine MIF to modulate AP-1 activity and the cell cycle through Jab1". Nature. 408 (6809): 211–6. Bibcode:2000Natur.408..211K. doi:10.1038/35041591. PMID11089976. S2CID205010648.
^Dechend R, Hirano F, Lehmann K, Heissmeyer V, Ansieau S, Wulczyn FG, et al. (June 1999). "The Bcl-3 oncoprotein acts as a bridging factor between NF-kappaB/Rel and nuclear co-regulators". Oncogene. 18 (22): 3316–23. doi:10.1038/sj.onc.1202717. PMID10362352. S2CID2356435.
^Caballero OL, Resto V, Patturajan M, Meerzaman D, Guo MZ, Engles J, et al. (May 2002). "Interaction and colocalization of PGP9.5 with JAB1 and p27(Kip1)". Oncogene. 21 (19): 3003–10. doi:10.1038/sj.onc.1205390. PMID12082530. S2CID20004395.
^Emberley ED, Niu Y, Leygue E, Tomes L, Gietz RD, Murphy LC, Watson PH (April 2003). "Psoriasin interacts with Jab1 and influences breast cancer progression". Cancer Research. 63 (8): 1954–61. PMID12702588.
Wolf DA, Zhou C, Wee S (December 2003). "The COP9 signalosome: an assembly and maintenance platform for cullin ubiquitin ligases?". Nature Cell Biology. 5 (12): 1029–33. doi:10.1038/ncb1203-1029. PMID14647295. S2CID37458780.
Tomoda K, Kubota Y, Kato J (March 1999). "Degradation of the cyclin-dependent-kinase inhibitor p27Kip1 is instigated by Jab1". Nature. 398 (6723): 160–5. doi:10.1038/18230. PMID10086358. S2CID204991745.
Dechend R, Hirano F, Lehmann K, Heissmeyer V, Ansieau S, Wulczyn FG, et al. (June 1999). "The Bcl-3 oncoprotein acts as a bridging factor between NF-kappaB/Rel and nuclear co-regulators". Oncogene. 18 (22): 3316–23. doi:10.1038/sj.onc.1202717. PMID10362352. S2CID2356435.
Bianchi E, Denti S, Granata A, Bossi G, Geginat J, Villa A, et al. (April 2000). "Integrin LFA-1 interacts with the transcriptional co-activator JAB1 to modulate AP-1 activity". Nature. 404 (6778): 617–21. Bibcode:2000Natur.404..617B. doi:10.1038/35007098. PMID10766246. S2CID4384395.
Kleemann R, Hausser A, Geiger G, Mischke R, Burger-Kentischer A, Flieger O, et al. (November 2000). "Intracellular action of the cytokine MIF to modulate AP-1 activity and the cell cycle through Jab1". Nature. 408 (6809): 211–6. Bibcode:2000Natur.408..211K. doi:10.1038/35041591. PMID11089976. S2CID205010648.
Gemmill RM, Bemis LT, Lee JP, Sozen MA, Baron A, Zeng C, et al. (May 2002). "The TRC8 hereditary kidney cancer gene suppresses growth and functions with VHL in a common pathway". Oncogene. 21 (22): 3507–16. doi:10.1038/sj.onc.1205437. PMID12032852. S2CID9964634.
Caballero OL, Resto V, Patturajan M, Meerzaman D, Guo MZ, Engles J, et al. (May 2002). "Interaction and colocalization of PGP9.5 with JAB1 and p27(Kip1)". Oncogene. 21 (19): 3003–10. doi:10.1038/sj.onc.1205390. PMID12082530. S2CID20004395.