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- Title
SWI/SNF-like chromatin remodeling factor Fun30 supports point centromere function in S. cerevisiae.
- Authors
Durand-Dubief, Mickaël; Will, William Ryan; Petrini, Edoardo; Theodorou, Delphine; Harris, Rachael R; Crawford, Margaret R; Paszkiewicz, Konrad; Krueger, Felix; Correra, Rosa Maria; Vetter, Anna T; Miller, J Ross; Kent, Nicholas A; Varga-Weisz, Patrick
- Abstract
Budding yeast centromeres are sequence-defined point centromeres and are, unlike in many other organisms, not embedded in heterochromatin. Here we show that Fun30, a poorly understood SWI/SNF-like chromatin remodeling factor conserved in humans, promotes point centromere function through the formation of correct chromatin architecture at centromeres. Our determination of the genome-wide binding and nucleosome positioning properties of Fun30 shows that this enzyme is consistently enriched over centromeres and that a majority of CENs show Fun30-dependent changes in flanking nucleosome position and/or CEN core micrococcal nuclease accessibility. Fun30 deletion leads to defects in histone variant Htz1 occupancy genome-wide, including at and around most centromeres. FUN30 genetically interacts with CSE4, coding for the centromere-specific variant of histone H3, and counteracts the detrimental effect of transcription through centromeres on chromosome segregation and suppresses transcriptional noise over centromere CEN3. Previous work has shown a requirement for fission yeast and mammalian homologs of Fun30 in heterochromatin assembly. As centromeres in budding yeast are not embedded in heterochromatin, our findings indicate a direct role of Fun30 in centromere chromatin by promoting correct chromatin architecture.
- Publication
PLoS genetics, 2012, Vol 8, Issue 9, pe1002974
- ISSN
1553-7404
- Publication type
Journal Article
- DOI
10.1371/journal.pgen.1002974