Phosphorylation of RNA polymerase II CTD regulates H3 methylation in yeast
Tiaojiang Xiao,Hana Hall,Kelby O. Kizer,Yoichiro Shibata,Mark C. Hall,Christoph H. Borchers,Brian D. Strahl +6 more
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TLDR
In this paper, Set2 is associated with Rbp1 and Rbp2, the two largest subunits of RNA polymerase II (RNA pol II), and this association is specific for the interaction of Set2 with the hyperphosphorylated form of RNA pol II.Abstract:
Histone methylation is now realized to be a pivotal regulator of gene transcription. Although recent studies have shed light on a trans-histone regulatory pathway that controls H3 Lys 4 and H3 Lys 79 methylation in Saccharomyces cerevisiae, the regulatory pathway that affects Set2-mediated H3 Lys 36 methylation is unknown. To determine the functions of Set2, and identify factors that regulate its site of methylation, we genomically tagged Set2 and identified its associated proteins. Here, we show that Set2 is associated with Rbp1 and Rbp2, the two largest subunits of RNA polymerase II (RNA pol II). Moreover, we find that this association is specific for the interaction of Set2 with the hyperphosphorylated form of RNA pol II. We further show that deletion of the RNA pol II C-terminal domain (CTD) kinase Ctk1, or partial deletion of the CTD, results in a selective abolishment of H3 Lys 36 methylation, implying a pathway of Set2 recruitment to chromatin and a role for H3 Lys 36 methylation in transcription elongation. In support, chromatin immunoprecipitation assays demonstrate the presence of Set2 methylation in the coding regions, as well as promoters, of genes regulated by Ctk1 or Set2. These data document a new link between histone methylation and the transcription apparatus and uncover a regulatory pathway that is selective for H3 Lys 36 methylation.read more
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Regulation of chromatin by histone modifications
TL;DR: The known histone modifications are described, where they are found genomically and discussed and some of their functional consequences are discussed, concentrating mostly on transcription where the majority of characterisation has taken place.
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The Role of Chromatin during Transcription
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The diverse functions of histone lysine methylation.
Cyrus Martin,Yi Zhang +1 more
TL;DR: Recent advances in understanding of how lysine methylation functions in these diverse biological processes are summarized, and questions that need to be addressed in the future are raised.
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A Chromatin Landmark and Transcription Initiation at Most Promoters in Human Cells
TL;DR: The results of a genome-wide analysis of human cells suggest that most protein-coding genes, including most genes thought to be transcriptionally inactive, experience transcription initiation, and that transcription initiation at most genes is a general phenomenon in human cells.
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Genome-wide map of nucleosome acetylation and methylation in yeast.
Dmitry K. Pokholok,Christopher T. Harbison,Stuart S. Levine,Megan F. Cole,Nancy M. Hannett,Tong Ihn Lee,George W. Bell,Kimberly Walker,P. Alex Rolfe,Elizabeth Herbolsheimer,Julia Zeitlinger,Fran Lewitter,David K. Gifford,Richard A. Young +13 more
TL;DR: These maps take into account changes in nucleosome occupancy at actively transcribed genes and, in doing so, revise previous assessments of the modifications associated with gene expression, providing the foundation for further understanding the roles of chromatin in gene expression and genome maintenance.
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