Recombinant Human COP9 signalosome complex subunit 8 (COPS8)

Uniprot Id

Q99627

Target Species

Human

Target Name

COPS8

Target Full Name

COP9 signalosome complex subunit 8

Target Function

Component 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 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/ICSBP, 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.

Target Subcellular Location

Cytoplasm. Nucleus.

Target Protein Families

CSN8 family

Target Synonyms

COP9 homolog; COP9 signalosome complex subunit 8; COP9 signalosome subunit 8; Cops8; CSN8; CSN8_HUMAN; hCOP9; JAB1 containing signalosome subunit 8; JAB1-containing signalosome subunit 8; SGN8; Signalosome subunit 8

Target Background

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. Alternatively spliced transcript variants encoding distinct isoforms have been observed.