COP9 signalosome subunit 6 (COPS6)

COP9 signalosome subunit 6 (COPS6) is one of eight subunits of the COP9 signalosome (CSN), a highly conserved multi-protein complex that is structurally and functionally similar to the 19S regulatory particle of the 26S proteasome[1][3]. COPS6 participates as an essential regulator in multiple signal transduction pathways, primarily through modulation and positive regulation of SCF-type E3 ubiquitin ligases, resulting in control of protein degradation via the ubiquitin-proteasome system[1][3][4]. It is also involved in cell cycle regulation, DNA damage response, immune cell infiltration, and transcriptional control[1][2][3]. COPS6 has been implicated as a crucial factor in the progression and prognosis of numerous cancers, correlating with poor outcomes and high-risk molecular profiles[2]. Its overexpression is associated with enhanced tumor growth, invasion, metastasis, and immune evasion, and it has interactions with key pathways such as p53-mediated tumor suppression, PD-L1 stability, and epithelial-mesenchymal transition[2]. There is growing interest in COPS6 as a pan-cancer biomarker, although clinical interventions directly targeting COPS6 have not reached advanced development[2][3].

Other names

COP9 signalosome complex subunit 6COPS6CSN6HVIPSGN6hVIPMOV34-34KDJAB1-containing signalosome subunit 6MOV34 homologVpr-interacting proteinCOP9 subunit 6 (MOV34 homolog, 34 kD)COP9 constitutive photomorphogenic homolog subunit 6

Drug mechanism is not established—however, modulation of COPS6 would be expected to affect processes such as ubiquitin-mediated proteolysis, signal transduction, and immune checkpoint pathways in cancer