Opposing roles for 53BP1 during homologous recombination

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Opposing roles for 53BP1 during homologous recombination

Although DNA non-homologous end-joining repairs most DNA double-strand breaks (DSBs) in G2 phase, late repairing DSBs undergo resection and repair by homologous recombination (HR). Based on parallels to the situation in G1 cells, previous work has suggested that DSBs that undergo repair by HR predominantly localize to regions of heterochromatin (HC). By using H3K9me3 and H4K20me3 to identify HC...

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Mutations in BLM helicase cause Bloom syndrome, characterized by predisposition to all forms of cancer. We demonstrate that BLM, signal transducer 53BP1, and RAD51 interact during stalled replication. Interactions between the three proteins have functional consequences. Lack of 53BP1 decreases the cell survival and enhanced chromosomal aberration after replication arrest. 53BP1 exhibits both BL...

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Phosphorylation-dependent interactions of BLM and 53BP1 are required for their anti-recombinogenic roles during homologous recombination.

Mutations in bloom helicase protein (BLM) helicase cause Bloom syndrome, characterized by predisposition to almost all forms of cancer. We have demonstrated previously that endogenous BLM, signal transducer 53BP1 and RAD51 are present in a complex during replication stress. Using full-length recombinant proteins, we now provide evidence that these proteins physically interact. BLM interacts wit...

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ژورنال

عنوان ژورنال: Nucleic Acids Research

سال: 2013

ISSN: 1362-4962,0305-1048

DOI: 10.1093/nar/gkt729