DNA double-stranded breaks induce histone H2AX phosphorylation on serine 139. Rogakou, E. P., Pilch, D. R., Orr, A. H., Ivanova, V. S., & Bonner, W. M. The Journal of Biological Chemistry, 273(10):5858–5868, March, 1998.
abstract   bibtex   
When mammalian cell cultures or mice are exposed to ionizing radiation in survivable or lethal amounts, novel mass components are found in the histone H2A region of two-dimensional gels. Collectively referred to as gamma, these components are formed in vivo by several procedures that introduce double-stranded breaks into DNA. gamma-Components, which appeared to be the only major novel components detected by mass or 32PO4 incorporation on acetic acid-urea-Triton X-100-acetic acid-urea-cetyltrimethylammonium bromide or SDS-acetic acid-urea-cetyltrimethylammonium bromide gels after exposure of cells to ionizing radiation, are shown to be histone H2AX species that have been phosphorylated specifically at serine 139. gamma-H2AX appears rapidly after exposure of cell cultures to ionizing radiation; half-maximal amounts are reached by 1 min and maximal amounts by 10 min. At the maximum, approximately 1% of the H2AX becomes gamma-phosphorylated per gray of ionizing radiation, a finding that indicates that 35 DNA double-stranded breaks, the number introduced by each gray into the 6 x 10(9) base pairs of a mammalian G1 genome, leads to the gamma-phosphorylation of H2AX distributed over 1% of the chromatin. Thus, about 0.03% of the chromatin appears to be involved per DNA double-stranded break. This value, which corresponds to about 2 x 10(6) base pairs of DNA per double-stranded break, indicates that large amounts of chromatin are involved with each DNA double-stranded break. Thus, gamma-H2AX formation is a rapid and sensitive cellular response to the presence of DNA double-stranded breaks, a response that may provide insight into higher order chromatin structures.
@article{rogakou_dna_1998,
	title = {{DNA} double-stranded breaks induce histone {H2AX} phosphorylation on serine 139},
	volume = {273},
	issn = {0021-9258},
	abstract = {When mammalian cell cultures or mice are exposed to ionizing radiation in survivable or lethal amounts, novel mass components are found in the histone H2A region of two-dimensional gels. Collectively referred to as gamma, these components are formed in vivo by several procedures that introduce double-stranded breaks into DNA. gamma-Components, which appeared to be the only major novel components detected by mass or 32PO4 incorporation on acetic acid-urea-Triton X-100-acetic acid-urea-cetyltrimethylammonium bromide or SDS-acetic acid-urea-cetyltrimethylammonium bromide gels after exposure of cells to ionizing radiation, are shown to be histone H2AX species that have been phosphorylated specifically at serine 139. gamma-H2AX appears rapidly after exposure of cell cultures to ionizing radiation; half-maximal amounts are reached by 1 min and maximal amounts by 10 min. At the maximum, approximately 1\% of the H2AX becomes gamma-phosphorylated per gray of ionizing radiation, a finding that indicates that 35 DNA double-stranded breaks, the number introduced by each gray into the 6 x 10(9) base pairs of a mammalian G1 genome, leads to the gamma-phosphorylation of H2AX distributed over 1\% of the chromatin. Thus, about 0.03\% of the chromatin appears to be involved per DNA double-stranded break. This value, which corresponds to about 2 x 10(6) base pairs of DNA per double-stranded break, indicates that large amounts of chromatin are involved with each DNA double-stranded break. Thus, gamma-H2AX formation is a rapid and sensitive cellular response to the presence of DNA double-stranded breaks, a response that may provide insight into higher order chromatin structures.},
	language = {eng},
	number = {10},
	journal = {The Journal of Biological Chemistry},
	author = {Rogakou, E. P. and Pilch, D. R. and Orr, A. H. and Ivanova, V. S. and Bonner, W. M.},
	month = mar,
	year = {1998},
	keywords = {Amino Acid Sequence, Animals, Cells, Cultured, Chromatin, DNA, Electrophoresis, Gel, Two-Dimensional, Gamma Rays, Histones, Mice, Mice, Inbred Strains, Molecular Sequence Data, Nuclear Proteins, Peptide Fragments, Phosphorylation, Phosphoserine, Protein Kinases, Recombinant Proteins, Whole-Body Irradiation},
	pages = {5858--5868},
}

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