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A comprehensive library encompassing alanine scanning mutations across yeast histones is presented as a Resource that will facilitate screening of chromatin processes. The utility of the library is indicated by screening in cis and in trans for residues that affect histone H3K4 trimethylation, a modification that is associated with actively transcribed genes and known to be mediated by the Set1-COMPASS complex.
The Schizosaccharomyces pombe SWI/SNF family of ATP-dependent chromatin-remodeling complexes is now comprehensively analyzed, through composition, phenotypic and microarray analyses, thus broadly setting the stage for S. pombe as a new model organism for examining the SWI/SNF family remodelers. The S. pombe complexes are more akin to the metazoan SWI/SNF remodelers and have specific roles in repression of iron-transport genes.
