ABF1-binding sites promote efficient global genome nucleotide excision repair

Yu, Shirong, Smirnova, Julia, Friedberg, Errol C., Stillman, Bruce, Akiyama, Masahiro, Owen-Hughes, Tom, Waters, Raymond and Reed, Simon Huw ORCID: https://orcid.org/0000-0002-4711-0560 2009. ABF1-binding sites promote efficient global genome nucleotide excision repair. Journal of Biological Chemistry 284 (2) , pp. 966-973. 10.1074/jbc.M806830200

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Abstract

Global genome nucleotide excision repair (GG-NER) removes DNA damage from nontranscribing DNA. In Saccharomyces cerevisiae, the RAD7 and RAD16 genes are specifically required for GG-NER. We have reported that autonomously replicating sequence-binding factor 1 (ABF1) protein forms a stable complex with Rad7 and Rad16 proteins. ABF1 functions in transcription, replication, gene silencing, and NER in yeast. Here we show that binding of ABF1 to its DNA recognition sequence found at multiple genomic locations promotes efficient GG-NER in yeast. Mutation of the I silencer ABF1-binding site at the HMLα locus caused loss of ABF1 binding, which resulted in a domain of reduced GG-NER efficiency on one side of the ABF1-binding site. During GG-NER, nucleosome positioning at this site was not altered, and this correlated with an inability of the GG-NER complex to reposition nucleosomes in vitro.We discuss how the GG-NER complex might facilitate GG-NER while preventing unregulated gene transcription during this process.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Medicine
Subjects:	Q Science > QH Natural history > QH426 Genetics
Publisher:	American Society for Biochemistry and Molecular Biology
ISSN:	0021-9258
Funders:	Medical Research Council
Last Modified:	19 Oct 2022 10:51
URI:	https://orca.cardiff.ac.uk/id/eprint/25754

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