Protein: Breast cancer type 1 susceptibility protein homolog (EC 2.3.2.27) (RING-type E3 ubiquitin transferase BRCA1) (O54952)
Organism: Rattus norvegicus (Rat)
Function: E3 ubiquitin-protein ligase that specifically mediates the formation of 'Lys-6'-linked polyubiquitin chains and plays a central role in DNA repair by facilitating cellular responses to DNA damage. It is unclear whether it also mediates the formation of other types of polyubiquitin chains. The BRCA1-BARD1 heterodimer coordinates a diverse range of cellular pathways such as DNA damage repair, ubiquitination and transcriptional regulation to maintain genomic stability. Regulates centrosomal microtubule nucleation. Required for appropriate cell cycle arrests after ionizing irradiation in both the S-phase and the G2 phase of the cell cycle. Required for FANCD2 targeting to sites of DNA damage. Inhibits lipid synthesis by binding to inactive phosphorylated ACACA and preventing its dephosphorylation. Contributes to homologous recombination repair (HRR) via its direct interaction with PALB2, fine-tunes recombinational repair partly through its modulatory role in the PALB2-dependent loading of BRCA2-RAD51 repair machinery at DNA breaks. Component of the BRCA1-RBBP8 complex which regulates CHEK1 activation and controls cell cycle G2/M checkpoints on DNA damage via BRCA1-mediated ubiquitination of RBBP8. Acts as a transcriptional activator.
Subcellular location: Nucleus {ECO:0000250|UniProtKB:P38398}. Chromosome {ECO:0000250|UniProtKB:P48754}. Cytoplasm {ECO:0000250|UniProtKB:P38398}. Note=Localizes at sites of DNA damage at double-strand breaks (DSBs); recruitment to DNA damage sites is mediated by the BRCA1-A complex. Translocated to the cytoplasm during UV-induced apoptosis. {ECO:0000250|UniProtKB:P38398}.
Interaction partners:
- DNA 5'-3' helicase
- Partner and localizer of BRCA2
- Breast cancer type 2 susceptibility protein homolog
- BRCA1-A complex subunit RAP80
- DNA endonuclease RBBP8
- BRCA1-A complex subunit Abraxas 1
- BRCA1-associated RING domain protein 1
- Serine-protein kinase ATM
- DNA topoisomerase 2-binding protein 1
- BRISC and BRCA1-A complex member 1
Sequence:
MDLSAVRIQEVQNVLHAMQKILECPICLELIKEPVSTQCDHIFCKFCMLKLLNQKKGPSQCPLCKNEITKRSLQGSARFSQLVEELLKIIDAFELDTGMQCANGFSFSKKKNSSSELLNEDASIIQSVGYRNRVKKLQQIESGSATLKDSLSVQLSNLGIVRSMKKNRQTQPQNKSVYIALESDSSEERVNAPDGCSVRDQELFQIAPGGAGDEGKLNSAKKAACDFSEGIRNIEHHQCSDKDLNPTENHATERHPEKCPRISVANVHVEPCGTDARASSLQRGTRSLLFTEDRLDAEKAEFCDRSKQSGAAVSQQSRWADSKETCNGRPVPRTEGKADPNVDSLCGRKQWNHPKSLCPENSGATTDVPWITLNSSIQKVNEWFSRTGEMLTSDNASDRRPASNAEAAVVLEVSNEVDGCFSSSKKIDLVAPDPDNAVMCTSGRDFSKPVENIINDKIFGKTYQRKGSRPHLNHVTEIIGTFTTEPQIIQEQPFTNKLKRKRSTCLHPEDFIKKADLTVVQRISENLNQGTDQMEPNDQAMSITSNGQENRATGNDLQRGRNAHPIESLRKEPAFTAKAKSISNSISDLEVELNVHSSKAPKKNRLRRKSTRCVLPLEPISRNPSPPTCAELQIESCGSSEETKKNNSNQTPAGHIREPQLIEDTEPAADAKKNEPNEHIRKRSASDAFPEEKLMNKAGLLTSCSSPRKPQGPVNPSPERKGIEQLEMCQMPDNNKELGDLVLGGEPSGKPTEPSEESTSVSLVPDTDYDTQNSVSILEANTVRYARTGSVQCMTQFVASENPKELVHGSNNAGSGSECFKHPLRHELNHNQETIEMEDSELDTQYLQNTFQVSKRQSFALFSKLRSPQKDCTLVGARSVPSREPSPKVTSRGEQKERQGQEESEISHVQAVTVTVGLPVPCQEGKPGAVTMCADVSRLCPSSHYRSCENGLNTTDKSGISQNSHFRQSVSPLRSSIKTDNRKTLTEGRFEKHTERGMGNETAVQSTIHTISLNNRGDACLEASSGSVIEVHSTGENVQGQLDRNRGPKVNTVSLLDSTQPGVSKQSAPVSDKYLEIKQESKAVSADFSPCLFSDHLEKPMRSDKTFQVCSETPDDLLDDVEIQENASFGEGGITEKSAIFNGSVLRRESSRSPSPVTHASKSRSLHRGSRKLEFSEESDSTEDEDLPCFQHLLSRVSSTPELTRCSSVVTQRVPEKAKGTQAPRKSSISDCNNEVILGEASQEYQFSEDAKCSGSMFSSQHSAALGSPANALSQDPDFNPPSKQRRHQAENEEAFLSDKELISDHEDMAACLEEASDQEEDSIIPDSVASGYESEANLSEDCSQSDILTTQQRATMKDNLIKLQQEMAQLEAVLEQHGSQPSGHPPCLPADPCALEDLPDPEQNRSGTAILTSKNINENPVSQNPKRACDDKSQPQPPDGLPSGDKESGMRRPSPFKSPLTSSRCSARGHSRSLQNRNSTSQEELLQPAXLEKSCEPHNLTGRSCLPRQDLEGTPYPESGIRLVSSRDPDSESPKVSALVCTAPASTSALKISQGQVAGSCRSPAAGGADTAVVEIVSKIKPEVTSPKERAERDISMVVSGLTPKEVMIVQKFAEKYRLALTDVITEETTHVIIKTDAEFVCERTLKYFLGIAGGKWIVSYSWVIKSIQERKLLSVHEFEVKGDVVTGSNHQGPRRSRESQEKLFEGLQIYCCEPFTNMPKDELERMLQLCGASVVKELPLLTRDTGAHPIVLVQPSAWTEDNDCPDIGQLCKGRLVMWDWVLDSISVYRCRDLDAYLVQNITCGRDGSEPQDSND