title: High-resolution genome-wide mapping of histone modifications.
abstract: The expression patterns of eukaryotic genomes are controlled by their chromatin structure, consisting of nucleosome subunits in which DNA of approximately 146 bp is wrapped around a core of 8 histone molecules. Post-translational histone modifications play an essential role in modifying chromatin structure. Here we apply a combination of SAGE and chromatin immunoprecipitation (ChIP) protocols to determine the distribution of hyperacetylated histones H3 and H4 in the Saccharomyces cerevisiae genome. We call this approach genome-wide mapping technique (GMAT). Using GMAT, we find that the highest acetylation levels are detected in the 5' end of a gene's coding region, but not in the promoter. Furthermore, we show that the histone acetyltransferase, GCN5p, regulates H3 acetylation in the promoter and 5' end of the coding regions. These findings indicate that GMAT should find valuable applications in mapping target sites of chromatin-modifying enzymes.
authors.affiliation: Laboratory of Molecular Immunology, National Heart, Lung, and Blood Institute, National Institutes of Health, 9000 Rockville Pike, Bethesda, Maryland 20892, USA.
authors.forename: Tae-young
authors.initials: TY
authors.lastname: Roh
authors.forename: Wing Chi
authors.initials: WC
authors.lastname: Ngau
authors.forename: Kairong
authors.initials: K
authors.lastname: Cui
authors.forename: David
authors.initials: D
authors.lastname: Landsman
authors.forename: Keji
authors.initials: K
authors.lastname: Zhao
mesh_terms: D002843:Chromatin / Q000235:genetics / Q000378:metabolism; D047369:Chromatin Immunoprecipitation / Q000379:methods*; D002874:Chromosome Mapping / Q000379:methods*; D020224:Expressed Sequence Tags; D020869:Gene Expression Profiling / Q000379:methods*; D016681:Genome, Fungal; D042421:Histone Code / Q000235:genetics; D006657:Histones / Q000737:chemistry* / Q000235:genetics*; D011401:Promoter Regions, Genetic; D012441:Saccharomyces cerevisiae / Q000235:genetics* / Q000378:metabolism*; D017422:Sequence Analysis, DNA / Q000379:methods
chemical_list: D002843:Chromatin; D006657:Histones