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The ERCC1/XPF endonuclease is required for efficient single-strand annealing and gene conversion in mammalian cells
Stockholm University, Faculty of Science, Department of Genetics, Microbiology and Toxicology.
Stockholm University, Faculty of Science, Department of Genetics, Microbiology and Toxicology.
2008 (English)In: Nucleic Acids Research, ISSN 0305-1048, E-ISSN 1362-4962, Vol. 36, no 1, 1-9 p.Article in journal (Refereed) Published
Abstract [en]

The mammalian ERCC1-XPF endonuclease has a suggested role in the repair of DNA double-strand breaks (DSB) by single-strand annealing (SSA). Here, we investigated the role of ERCC1 in homologous recombination in mammalian cells, and confirm a role of ERCC1 in SSA. Interestingly, we also report an unexpected role for ERCC1 in gene conversion. This provides support that gene conversion in mammalian somatic cells is carried out through synthesis-dependent strand annealing, rather than through a double Holliday Junction mechanism. Moreover, we find low frequencies of SSA and gene conversion in G1-arrested cells, suggesting that SSA is not a frequent DSB repair pathway in G1-arrested mammalian cells, even in the presence of perfect repeats. Furthermore, we find that SSA is not influenced by inhibition of CDK2 (using Roscovitine), ATM (using Caffeine and KU55933), Chk1 (using CEP-3891) or DNA-PK (using NU7026).

Place, publisher, year, edition, pages
2008. Vol. 36, no 1, 1-9 p.
Keyword [en]
nucleotide excision-repair, homologous recombination repair, break repair, dna-repair, nuclear abnormalities, directed repair, cycle, atm, inhibition, pathways
National Category
Biochemistry and Molecular Biology
Identifiers
URN: urn:nbn:se:su:diva-59144DOI: 10.1093/nar/gkm888ISI: 000252545100010OAI: oai:DiVA.org:su-59144DiVA: diva2:426809
Note
authorCount :3Available from: 2011-06-27 Created: 2011-06-21 Last updated: 2017-12-11Bibliographically approved

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