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• W2315661732 endingPage "1456" @default.
• W2315661732 startingPage "1440" @default.
• W2315661732 abstract "Chromatin is thought to modulate access of repair proteins to DNA lesions, and may be altered by chromatin remodelers to facilitate repair. We investigated the participation of chromatin remodelers and DNA repair in 5-fluorouracil (5-FU) cytotoxicity in Saccharomyces cerevisiae. 5-FU is an antineoplastic drug commonly used in clinical settings. Among the several strains tested, only those with deficiencies in ATP-dependent chromatin remodeling (CR) and some histone acetyltransferases (HAT) exhibited sensitivity to 5-FU. CR and HAT double-mutants exhibited increased resistance to 5-FU in comparison to the wild-type mutant, but were still arrested in G2/M, as were the sensitive strains. The participation of Htz1p in 5-FU toxicity was also evaluated in single- and double-mutants of CR and HAT; the most significant effect was on cell cycle distribution. 5-FU lesions are repaired by different DNA repair machineries, including homologous recombination (HR) and post-replication repair (PRR). We investigated the role of CR and HAT in these DNA repair pathways. Deficiencies in Nhp10 and CR combined with deficiencies in HR or PRR increased 5-FU sensitivity; however, combined deficiencies of HAT, HR, and PRR did not. CRs are directly recruited to DNA damage and lead to chromatin relaxation, which facilitates access of HR and PRR proteins to 5-FU lesions. Combined deficiencies in HAT with defects in HR and PRR did not potentiate 5-FU cytotoxicity, possibly because they function in a common pathway." @default.
• W2315661732 created "2016-06-24" @default.
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• W2315661732 date "2013-01-01" @default.
• W2315661732 modified "2023-09-30" @default.
• W2315661732 title "ATP-dependent chromatin remodeling and histone acetyltransferases in 5-FU cytotoxicity in Saccharomyces cerevisiae" @default.
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• W2315661732 doi "https://doi.org/10.4238/2013.april.26.6" @default.
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