| Literature DB >> 22789542 |
Katharina Schlacher1, Hong Wu, Maria Jasin.
Abstract
Genes mutated in patients with Fanconi anemia (FA) interact with the DNA repair genes BRCA1 and BRCA2/FANCD1 to suppress tumorigenesis, but the molecular functions ascribed to them cannot fully explain all of their cellular roles. Here, we show a repair-independent requirement for FA genes, including FANCD2, and BRCA1 in protecting stalled replication forks from degradation. Fork protection is surprisingly rescued in FANCD2-deficient cells by elevated RAD51 levels or stabilized RAD51 filaments. Moreover, FANCD2-mediated fork protection is epistatic with RAD51 functions, revealing an unanticipated fork protection pathway that connects FA genes to RAD51 and the BRCA1/2 breast cancer suppressors. Collective results imply a unified molecular mechanism for repair-independent functions of FA, RAD51, and BRCA1/2 proteins in preventing genomic instability and suppressing tumorigenesis.Entities:
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Year: 2012 PMID: 22789542 PMCID: PMC3954744 DOI: 10.1016/j.ccr.2012.05.015
Source DB: PubMed Journal: Cancer Cell ISSN: 1535-6108 Impact factor: 31.743