Reference: Krebs JE, et al. (1999) Cell cycle-regulated histone acetylation required for expression of the yeast HO gene. Genes Dev 13(11):1412-21

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Abstract


Expression of the yeast HO gene in late G1 of the cell cycle requires the SWI/SNF chromatin remodeling complex, the Gcn5p histone acetyltransferase, and two different sequence-specific transcriptional activators, Swi5p and Swi4p/Swi6p. We have used chromatin immunoprecipitation assays to investigate the role of each of these trans-acting factors in establishing a cell cycle-regulated domain of histone acetylation surrounding the HO upstream regulatory region. We detect a approximately 1-kb domain of H3 and H4 acetylation that is established in mid-G1, prior to and independent of HO transcription, which then declines with kinetics similar to inactivation of HO. This cell cycle burst of histone acetylation requires Gcn5p, SWI/SNF, and the Swi5p activator, but occurs in the absence of the Swi4p activator. We also find that inactivation of the Sin3p/Rpd3p deacetylase complex leads to a high level of acetylation at the HO locus throughout the cell cycle. We propose a sequential model for activation of HO in which the Swi5p-dependent recruitment of the Gcn5p acetyltransferase requires chromatin remodeling events by the SWI/SNF complex.

Reference Type
Journal Article | Research Support, Non-U.S. Gov't | Research Support, U.S. Gov't, P.H.S.
Authors
Krebs JE, Kuo MH, Allis CD, Peterson CL
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