title: Quantitative Measurement of Histone Tail Acetylation Reveals Stage-Specific Regulation and Response to Environmental Changes during Drosophila Development.
abstract: Histone modification plays a major role in regulating gene transcription and ensuring the healthy development of an organism. Numerous studies have suggested that histones are dynamically modified during developmental events to control gene expression levels in a temporal and spatial manner. However, the study of histone acetylation dynamics using currently available techniques is hindered by the difficulty of simultaneously measuring acetylation of the numerous potential sites of modification present in histones. Here, we present a methodology that allows us to combine mass spectrometry-based histone analysis with Drosophila developmental genetics. Using this system, we characterized histone acetylation patterns during multiple developmental stages of the fly. Additionally, we utilized this analysis to characterize how treatments with pharmacological agents or environmental changes such as γ-irradiation altered histone acetylation patterns. Strikingly, γ-irradiation dramatically increased the level of acetylation at H3K18, a site linked to DNA repair via nonhomologous end joining. In mutant fly strains deficient in DNA repair proteins, however, this increase in the level of H3K18 acetylation was lost. These results demonstrate the efficacy of our combined mass spectrometry system with a Drosophila model system and provide interesting insight into the changes in histone acetylation during development, as well as the effects of both pharmacological and environmental agents on global histone acetylation.
authors.affiliation: Department of Cancer Biology, Fox Chase Cancer Center , Philadelphia, Pennsylvania 19111, United States.
authors.forename: Ryan A
authors.initials: RA
authors.lastname: Henry
authors.affiliation: Department of Cancer Biology, Fox Chase Cancer Center , Philadelphia, Pennsylvania 19111, United States.|Department of Biochemistry and Molecular Biology, Drexel College of Medicine , Philadelphia, Pennsylvania 19102, United States.
authors.forename: Tanu
authors.initials: T
authors.lastname: Singh
authors.affiliation: Department of Cancer Biology, Fox Chase Cancer Center , Philadelphia, Pennsylvania 19111, United States.
authors.forename: Yin-Ming
authors.initials: YM
authors.lastname: Kuo
authors.affiliation: Immersion Science Program, Fox Chase Cancer Center , Philadelphia, Pennsylvania 19111, United States.
authors.forename: Alison
authors.initials: A
authors.lastname: Biester
authors.affiliation: Immersion Science Program, Fox Chase Cancer Center , Philadelphia, Pennsylvania 19111, United States.
authors.forename: Abigail
authors.initials: A
authors.lastname: O'Keefe
authors.affiliation: Immersion Science Program, Fox Chase Cancer Center , Philadelphia, Pennsylvania 19111, United States.
authors.forename: Sandy
authors.initials: S
authors.lastname: Lee
authors.affiliation: Department of Cancer Biology, Fox Chase Cancer Center , Philadelphia, Pennsylvania 19111, United States.
authors.forename: Andrew J
authors.initials: AJ
authors.lastname: Andrews
authors.affiliation: Department of Cancer Biology, Fox Chase Cancer Center , Philadelphia, Pennsylvania 19111, United States.
authors.forename: Alana M
authors.initials: AM
authors.lastname: O'Reilly
mesh_terms: D000107:Acetylation; D000818:Animals; D004260:DNA Repair; D029721:Drosophila Proteins / Q000235:genetics / Q000378:metabolism*; D004331:Drosophila melanogaster; D005720:Gamma Rays; D006657:Histones / Q000235:genetics / Q000378:metabolism*; D009154:Mutation; D014158:Transcription, Genetic / Q000528:radiation effects*
chemical_list: D029721:Drosophila Proteins; D006657:Histones
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