Homodimer; dimerizes via the coiled coil domain (PubMed:15084581). Interacts (via the PXDLS motif) with
CTBP1; the interaction is disrupted via binding of the adenovirus E1A to
CTBP1 (PubMed:9535825). Component of the
BRCA1-
RBBP8 complex. Interacts (the Ser-327 phosphorylated form) with
BRCA1 (via the C-terminal
BRCA1 domains): the interaction occurs in the G2 phase, ubiquitinates
RBBP8 and involves
RBBP8 in
BRCA1-dependent G2/M checkpoint control on DNA damage (PubMed:10764811, PubMed:15485915, PubMed:16818604, PubMed:17965729, PubMed:23623683). Interacts with
RB1 (PubMed:9721205). Interacts with the MRN complex. Interacts directly with
MRE11; the interaction is required for efficient homologous recombination (HR) and regulation of the MRN complex (PubMed:19759395, PubMed:23623683). Interacts directly with
RAD50 (PubMed:19759395). Interacts directly with
NBN (PubMed:19759395). Interacts with
SIRT6; the interaction deacetylates
RBBP8 upon DNA damage (PubMed:20829486). Interacts with LM04 (via the LIM zinc-binding 1 domain) (PubMed:11751867). Interacts with
SIAH1 (PubMed:14654780). Interacts with
RNF138 (PubMed:26502057). Interacts with
EXD2 (PubMed:26807646). Interacts with
CUL3 and
KLHL15; this interaction leads to
RBBP8 proteasomal degradation (PubMed:27561354). Directly interacts with
PIN1; this interaction depends upon
RBBP8 phosphorylation, predominantly at Thr-315 (PubMed:23623683). Interacts with
FZR1; this interaction leads to
APC/C-mediated
RBBP8 proteasomal degradation (PubMed:25349192). Interacts with
AUNIP; leading to recruit
RBBP8 to sites of DNA damage (PubMed:29042561, PubMed:10764811, PubMed:11751867, PubMed:14654780, PubMed:15084581, PubMed:15485915, PubMed:16818604, PubMed:17965729, PubMed:19759395, PubMed:20829486, PubMed:23623683, PubMed:25349192, PubMed:26502057, PubMed:26807646, PubMed:27561354, PubMed:9535825, PubMed:9721205). Interacts with
SAMHD1 (PubMed:28834754).
UniProt