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Molecular and Cellular Biology
Article . 2009 . Peer-reviewed
License: ASM Journals Non-Commercial TDM
Data sources: Crossref
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An Rtt109-Independent Role for Vps75 in Transcription-Associated Nucleosome Dynamics

Authors: Selth, L.; Lorch, Y.; Ocampo-Hafalla, M.; Mitter, R.; Shales, M.; Krogan, N.; Kornberg, R.; +1 Authors

An Rtt109-Independent Role for Vps75 in Transcription-Associated Nucleosome Dynamics

Abstract

The histone chaperone Vps75 forms a complex with, and stimulates the activity of, the histone acetyltransferase Rtt109. However, Vps75 can also be isolated on its own and might therefore possess Rtt109-independent functions. Analysis of epistatic miniarray profiles showed that VPS75 genetically interacts with factors involved in transcription regulation whereas RTT109 clusters with genes linked to DNA replication/repair. Additional genetic and biochemical experiments revealed a close relationship between Vps75 and RNA polymerase II. Furthermore, Vps75 is recruited to activated genes in an Rtt109-independent manner, and its genome-wide association with genes correlates with transcription rate. Expression microarray analysis identified a number of genes whose normal expression depends on VPS75. Interestingly, histone H2B dynamics at some of these genes are consistent with a role for Vps75 in histone H2A/H2B eviction/deposition during transcription. Indeed, reconstitution of nucleosome disassembly using the ATP-dependent chromatin remodeler Rsc and Vps75 revealed that these proteins can cooperate to remove H2A/H2B dimers from nucleosomes. These results indicate a role for Vps75 in nucleosome dynamics during transcription, and importantly, this function appears to be largely independent of Rtt109.

Keywords

Chromatin Immunoprecipitation, Genome, Binding Sites, Saccharomyces cerevisiae Proteins, Transcription, Genetic, Gene Expression Profiling, Lysine, Acetylation, Saccharomyces cerevisiae, Nucleosomes, Histones, Fungal, Genetic, Mutation, Cluster Analysis, RNA Polymerase II, Genome, Fungal, Transcription, Histone Acetyltransferases, Molecular Chaperones, Oligonucleotide Array Sequence Analysis, Protein Binding

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
26
Average
Average
Top 10%
bronze