XRCC1 is required for DNA single-strand break repair in human cells
نویسندگان
چکیده
منابع مشابه
XRCC1 is required for DNA single-strand break repair in human cells
The X-ray repair cross complementing 1 (XRCC1) protein is required for viability and efficient repair of DNA single-strand breaks (SSBs) in rodents. XRCC1-deficient mouse or hamster cells are hypersensitive to DNA damaging agents generating SSBs and display genetic instability after such DNA damage. The presence of certain polymorphisms in the human XRCC1 gene has been associated with altered c...
متن کاملMutations in hamster single-strand break repair gene XRCC1 causing defective DNA repair.
The molecular basis for the DNA repair dysfunction observed in mutant Chinese hamster ovary cell lines of X-ray repair cross complementing group 1 (XRCC1) is unknown and the exact role of the XRCC1 protein remains unclear. To help clarify the role of the XRCC1 gene we analyzed four mutant cell lines of this complementation group and a revertant cell line for XRCC1 protein content and for sequen...
متن کاملCentral role for the XRCC1 BRCT I domain in mammalian DNA single-strand break repair.
The DNA single-strand break repair (SSBR) protein XRCC1 is required for genetic stability and for embryonic viability. XRCC1 possesses two BRCA1 carboxyl-terminal (BRCT) protein interaction domains, denoted BRCT I and II. BRCT II is required for SSBR during G(1) but is dispensable for this process during S/G(2) and consequently for cell survival following DNA alkylation. Little is known about B...
متن کاملXRCC1 Stimulates Human Polynucleotide Kinase Activity at Damaged DNA Termini and Accelerates DNA Single-Strand Break Repair
XRCC1 protein is required for DNA single-strand break repair and genetic stability but its biochemical role is unknown. Here, we report that XRCC1 interacts with human polynucleotide kinase in addition to its established interactions with DNA polymerase-beta and DNA ligase III. Moreover, these four proteins are coassociated in multiprotein complexes in human cell extract and together they repai...
متن کاملDefective DNA single-strand break repair is responsible for senescence and neoplastic escape of epithelial cells
The main characteristic of senescence is its stability which relies on the persistence of DNA damage. We show that unlike fibroblasts, senescent epithelial cells do not activate an ATM-or ATR-dependent DNA damage response (DDR), but accumulate oxidative-stress-induced DNA single-strand breaks (SSBs). These breaks remain unrepaired because of a decrease in PARP1 expression and activity. This lea...
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ژورنال
عنوان ژورنال: Nucleic Acids Research
سال: 2005
ISSN: 0305-1048,1362-4962
DOI: 10.1093/nar/gki543