FEATURES

FAMILY

DESCRIPTION

Also known as UIMC1_HUMAN, UIMC1, RAP80, RXRIP110. Ubiquitin-binding protein (PubMed:24627472). Specifically recognizes and binds 'Lys-63'-linked ubiquitin (PubMed:19328070, Ref.38). Plays a central role in the BRCA1-A complex by specifically binding 'Lys-63'-linked ubiquitinated histones H2A and H2AX at DNA lesions sites, leading to target the BRCA1-BARD1 heterodimer to sites of DNA damage at double-strand breaks (DSBs). The BRCA1-A complex also possesses deubiquitinase activity that specifically removes 'Lys-63'-linked ubiquitin on histones H2A and H2AX. Also weakly binds monoubiquitin but with much less affinity than 'Lys-63'-linked ubiquitin. May interact with monoubiquitinated histones H2A and H2B; the relevance of such results is however unclear in vivo. Does not bind Lys-48'-linked ubiquitin. May indirectly act as a transcriptional repressor by inhibiting the interaction of NR6A1 with the corepressor NCOR1. Component of the ARISC complex, at least composed of UIMC1/RAP80, ABRAXAS1, BRCC3/BRCC36, BABAM2 and BABAM1/NBA1 (PubMed:24075985). Component of the BRCA1-A complex, at least composed of the BRCA1, BARD1, UIMC1/RAP80, ABRAXAS1, BRCC3/BRCC36, BABAM2 and BABAM1/NBA1 (PubMed:17525341, PubMed:17525342, PubMed:19261746, PubMed:19261749). In the BRCA1-A complex, interacts directly with ABRAXAS1 (PubMed:17643121, PubMed:17643122, PubMed:19261749, PubMed:19261748, PubMed:18077395). Interacts with UBE2I (PubMed:17698038). Interacts with NR6A1 (PubMed:12080054). Interacts with ESR1 (PubMed:17311814). Interacts with TSP57 (By similarity). Interacts with TRAIP (PubMed:26781088).

EXTERNAL LINKS

UIMC1

BRCA1-A complex subunit RAP80

UIMC1

Molecular Synopsis