Functional connection between histone acetyltransferase Gcn5p and methyltransferase Hmt1p

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Functional connection between histone acetyltransferase Gcn5p and methyltransferase Hmt1p.

Histone acetylation and methylation are linked to a variety of nuclear activities, most notably transcriptional regulation. Both synergistic and antagonistic relationships between these two modifications have been reported in different systems. Here we show that the budding yeast histone H4 arginine 3 (R3) methyltransferase Hmt1p binds acetylated histones H3 and H4, and importantly, that acetyl...

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We report the cloning of a transcription-associated histone acetyltransferase type A(HAT A). This Tetrahymena enzyme is strikingly homologous to the yeast protein Gcn5, a putative transcriptional adaptor, and we demonstrate that recombinant Gcn5p possesses HAT activity. Both the ciliate enzyme and Gcn5p contain potential active site residues found in other acetyltransferases and a highly conser...

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Essential and redundant functions of histone acetylation revealed by mutation of target lysines and loss of the Gcn5p acetyltransferase.

The Gcn5p histone acetyltransferase exhibits a limited substrate specificity in vitro. However, neither the specificity of this enzyme in vivo nor the importance of particular acetylated residues to transcription or cell growth are well defined. To probe these questions, we mutated specific lysines in the N-termini of histones H3 and H4 and examined the effects of these mutations in yeast strai...

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ژورنال

عنوان ژورنال: Biochimica et Biophysica Acta (BBA) - Gene Regulatory Mechanisms

سال: 2009

ISSN: 1874-9399

DOI: 10.1016/j.bbagrm.2009.03.004