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Szilard RK, et al.  (2010) Systematic identification of fragile sites via genome-wide location analysis of gamma-H2AX. Nat Struct Mol Biol 17(3):299-305

Abstract: Phosphorylation of histone H2AX is an early response to DNA damage in eukaryotes. In Saccharomyces cerevisiae, DNA damage or replication-fork stalling results in phosphorylation of histone H2A yielding gamma-H2A (yeast gamma-H2AX) in a Mec1 (ATR)- and Tel1 (ATM)-dependent manner. Here, we describe the genome-wide location analysis of gamma-H2A as a strategy to identify loci prone to engaging the Mec1 and Tel1 pathways. Notably, gamma-H2A enrichment overlaps with loci prone to replication-fork stalling and is caused by the action of Mec1 and Tel1, indicating that these loci are prone to breakage. Moreover, about half the sites enriched for gamma-H2A map to repressed protein-coding genes, and histone deacetylases are necessary for formation of gamma-H2A at these loci. Finally, our work indicates that high-resolution mapping of gamma-H2AX is a fruitful route to map fragile sites in eukaryotic genomes.

Status: Published Type: Journal Article PubMed ID: 20139982

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HST1 HTA1 HTA2 MEC1 POL2 RPD3 RRM3 SML1 TEL1 tX(XXX)L
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