In eukaryotic cells, the repair of DNA double-strand breaks by homologous recombination requires a RecA-like recombinase, Rad51p, and a Swi2p/Snf2p-like ATPase, Rad54p. Here we find that yeast Rad51p and Rad54p support robust homologous pairing between single-stranded DNA and a chromatin donor. In contrast, bacterial RecA is incapable of catalyzing homologous pairing with a chromatin donor. We also show that Rad54p possesses many of the biochemical properties of bona fideATP-dependent chromatin-remodeling enzymes, such as ySWI/SNF. Rad54p can enhance the accessibility of DNA within nucleosomal arrays, but it does not seem to disrupt nucleosome positioning. Taken together, our results indicate that Rad54p is a chromatin-remodeling enzyme that promotes homologous DNA pairing events within the context of chromatin.
Rad54p Is a Chromatin Remodeling Enzyme Required for Heteroduplex DNA Joint Formation with Chromatin*
M. Jaskelioff,S. van Komen,J. Krebs,P. Sung,C. Peterson
Published 2003 in Journal of Biological Chemistry
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- Publication year
2003
- Venue
Journal of Biological Chemistry
- Publication date
2003-03-14
- Fields of study
Biology, Medicine, Chemistry
- Identifiers
- External record
- Source metadata
Semantic Scholar, PubMed
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