Histone H2B deacetylation at lysine 11 is required for yeast apoptosis induced by phosphorylation of H2B at serine 10
- PMID: 17052455
- DOI: 10.1016/j.molcel.2006.09.008
Histone H2B deacetylation at lysine 11 is required for yeast apoptosis induced by phosphorylation of H2B at serine 10
Abstract
Chromatin alterations, induced by covalent histone modifications, mediate a wide range of DNA-templated processes, including apoptosis. Apoptotic chromatin condensation has been causally linked to the phosphorylation of histone H2B (serine 14 in human; serine 10 in yeast, H2BS10ph) in human and yeast cells. Here, we extend these studies by demonstrating a unidirectional, crosstalk pathway between H2BS10 phosphorylation and lysine 11 acetylation (H2BK11ac) in yeast. We demonstrate that the H2BK11 acetyl mark, which exists in growing yeast, is removed upon H(2)O(2) treatment but before H2BS10ph occurs, in a unidirectional fashion. H2B K11Q mutants are resistant to cell death elicited by H(2)O(2), while H2B K11R mutants that mimic deacetylation promote cell death. Our results suggest that Hos3 HDAC deacetylates H2BK11ac, which in turn mediates H2BS10ph by Ste20 kinase. Together, these studies underscore a concerted series of enzyme reactions governing histone modifications that promote a switch from cell proliferation to cell death.
Comment in
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Yeast unravels epigenetic apoptosis control: deadly chat within a histone tail.Mol Cell. 2006 Oct 20;24(2):167-9. doi: 10.1016/j.molcel.2006.10.004. Mol Cell. 2006. PMID: 17052450 Review.
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