title: CCDC98 targets BRCA1 to DNA damage sites.
abstract: Breast cancer-1 (BRCA1) participates in the DNA damage response. However, the mechanism by which BRCA1 is recruited to DNA damage sites remains elusive. Recently, we have demonstrated that a ubiquitin-binding protein, RAP80, is required for DNA damage-induced BRCA1 translocation. Here we identify another component, CCDC98, in the BRCA1-RAP80 complex. CCDC98 mediates BRCA1's association with RAP80. Moreover, CCDC98 controls both DNA damage-induced formation of BRCA1 foci and BRCA1-dependent G2/M checkpoint activation. Together, our results demonstrate that CCDC98 is a BRCA1 binding partner that mediates BRCA1 function in response to DNA damage.
authors.affiliation: Division of Molecular Medicine and Genetics, Department of Internal Medicine, University of Michigan Medical School, 109 Zina Pitcher Place, BSRB 1520, Ann Arbor, Michigan 48109, USA.
authors.forename: Zixing
authors.initials: Z
authors.lastname: Liu
authors.forename: Jiaxue
authors.initials: J
authors.lastname: Wu
authors.forename: Xiaochun
authors.initials: X
authors.lastname: Yu
mesh_terms: D019313:BRCA1 Protein / Q000378:metabolism*; D002352:Carrier Proteins / Q000737:chemistry / Q000378:metabolism / Q000502:physiology*; D002453:Cell Cycle / Q000502:physiology; D002460:Cell Line; D004249:DNA Damage; D004260:DNA Repair; D004268:DNA-Binding Proteins; D056488:Histone Chaperones; D006801:Humans; D009687:Nuclear Proteins / Q000378:metabolism; D025941:Protein Interaction Mapping; D017434:Protein Structure, Tertiary; D021381:Protein Transport; D015398:Signal Transduction
chemical_list: C520310:ABRAXAS1 protein, human; D019313:BRCA1 Protein; D002352:Carrier Proteins; D004268:DNA-Binding Proteins; D056488:Histone Chaperones; D009687:Nuclear Proteins; C466234:UIMC1 protein, human