PCNA promotes processive DNA end resection by Exo1
نویسندگان
چکیده
منابع مشابه
PCNA promotes processive DNA end resection by Exo1
Exo1-mediated resection of DNA double-strand break ends generates 3' single-stranded DNA overhangs required for homology-based DNA repair and activation of the ATR-dependent checkpoint. Despite its critical importance in inducing the overall DNA damage response, the mechanisms and regulation of the Exo1 resection pathway remain incompletely understood. Here, we identify the ring-shaped DNA clam...
متن کاملThe SOSS1 single-stranded DNA binding complex promotes DNA end resection in concert with Exo1.
The human SSB homologue 1 (hSSB1) has been shown to facilitate homologous recombination and double-strand break signalling in human cells. Here, we compare the DNA-binding properties of the SOSS1 complex, containing SSB1, with Replication Protein A (RPA), the primary single-strand DNA (ssDNA) binding complex in eukaryotes. Ensemble and single-molecule approaches show that SOSS1 binds ssDNA with...
متن کاملPhosphorylation of EXO1 by CDKs 1 and 2 regulates DNA end resection and repair pathway choice
Resection of DNA double-strand breaks (DSBs) is a pivotal step during which the choice between NHEJ and HR DNA repair pathways is made. Although CDKs are known to control initiation of resection, their role in regulating long-range resection remains elusive. Here we show that CDKs 1/2 phosphorylate the long-range resection nuclease EXO1 at four C-terminal S/TP sites during S/G2 phases of the ce...
متن کاملThe Human SRCAP Chromatin Remodeling Complex Promotes DNA-End Resection
BACKGROUND Repair of DNA double-strand breaks (DSBs) by homologous recombination requires 5'-3' resection of the DSB ends. In vertebrates, DSB resection is initiated by the collaborative action of CtIP and the MRE11-RAD50-NBS1 (MRN) complex. However, how this process occurs within the context of chromatin is still not well understood. RESULTS Here we identify the human SRCAP chromatin remodel...
متن کاملSAMHD1 Promotes DNA End Resection to Facilitate DNA Repair by Homologous Recombination.
DNA double-strand break (DSB) repair by homologous recombination (HR) is initiated by CtIP/MRN-mediated DNA end resection to maintain genome integrity. SAMHD1 is a dNTP triphosphohydrolase, which restricts HIV-1 infection, and mutations are associated with Aicardi-Goutières syndrome and cancer. We show that SAMHD1 has a dNTPase-independent function in promoting DNA end resection to facilitate D...
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ژورنال
عنوان ژورنال: Nucleic Acids Research
سال: 2013
ISSN: 1362-4962,0305-1048
DOI: 10.1093/nar/gkt672