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"Binding of chromatin-modifying activities to phosphorylated histone H2A at DNA damage sites." |
Downs JA, Allard S, Jobin-Robitaille O, Javaheri A, Auger A, Bouchard N, Kron SJ, Jackson SP, Cote J |
Published Dec. 22, 2004 in Mol Cell volume 16 .
Pubmed ID: 15610740
Abstract:
| Yeast histone H2A is phosphorylated on Ser129 upon DNA damage, an event required for efficient repair. We show that phosphorylation occurs rapidly over a large region around DNA double-strand breaks (DSBs). Histone H4 acetylation is also important for DSB repair, and we found that the NuA4 HAT complex associates specifically with phospho-H2A peptides. A single NuA4 subunit, Arp4, is responsible for the interaction. The NuA4 complex is recruited to a DSB concomitantly with the appearance of H2A P-Ser129 and Arp4 is important for this binding. Arp4 is also a subunit of the Ino80 and Swr1 chromatin remodeling complexes, which also interact with H2A P-Ser129 and are recruited to DSBs. This association again requires Arp4 but also prior NuA4 recruitment and action. Thus, phosphorylation of H2A at DNA damage sites creates a mark recognized by different chromatin modifiers. This interaction leads to stepwise chromatin reconfiguration, allowing efficient DNA repair. |
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Last modification of this entry: Oct. 6, 2010
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