RAP80 targets BRCA1 to specific ubiquitin structures at DNA damage sites

Bijan Sobhian, Genze Shao, Dana R. Lilli, Aedin C. Culhane, Lisa A. Moreau, Bing Xia, David M. Livingston, Roger A. Greenberg

Research output: Contribution to journalArticlepeer-review

Abstract

Mutations affecting the BRCT domains of the breast cancer -associated tumor suppressor BRCA1 disrupt the recruitment of this protein to DNA double-strand breaks (DSBs). The molecular structures at DSBs recognized by BRCA1 are presently unknown. We report the interaction of the BRCA1 BRCT domain with RAP80, a ubiquitin-binding protein. RAP80 targets a complex containing the BRCA1-BARD1 (BRCA1-associated ring domain protein 1) E3 ligase and the deubiquitinating enzyme (DUB) BRCC36 to MDC1-γH2AX-dependent lysine 6- and lysine63-linked ubiquitin polymers at DSBs. These events are required for cell cycle checkpoint and repair responses to ionizing radiation, implicating ubiquitin chain recognition and turnover in the BRCA1-mediated repair of DSBs.

Original languageEnglish
Pages (from-to)1198-1202
Number of pages5
JournalScience
Volume316
Issue number5828
DOIs
Publication statusPublished - 25 May 2007
Externally publishedYes

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