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The Prefoldin Complex Regulates Chromatin Dynamics during Transcription Elongation.

Authors :
Millán-Zambrano, Gonzalo
Rodríguez-Gil, Alfonso
Peñate, Xenia
de Miguel-Jiménez, Lola
Morillo-Huesca, Macarena
Krogan, Nevan
Chávez, Sebastián
Source :
PLoS Genetics; Sep2013, Vol. 9 Issue 9, p1-18, 18p
Publication Year :
2013

Abstract

Transcriptional elongation requires the concerted action of several factors that allow RNA polymerase II to advance through chromatin in a highly processive manner. In order to identify novel elongation factors, we performed systematic yeast genetic screening based on the GLAM (Gene Length-dependent Accumulation of mRNA) assay, which is used to detect defects in the expression of long transcription units. Apart from well-known transcription elongation factors, we identified mutants in the prefoldin complex subunits, which were among those that caused the most dramatic phenotype. We found that prefoldin, so far involved in the cytoplasmic co-translational assembly of protein complexes, is also present in the nucleus and that a subset of its subunits are recruited to chromatin in a transcription-dependent manner. Prefoldin influences RNA polymerase II the elongation rate in vivo and plays an especially important role in the transcription elongation of long genes and those whose promoter regions contain a canonical TATA box. Finally, we found a specific functional link between prefoldin and histone dynamics after nucleosome remodeling, which is consistent with the extensive network of genetic interactions between this factor and the machinery regulating chromatin function. This study establishes the involvement of prefoldin in transcription elongation, and supports a role for this complex in cotranscriptional histone eviction. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
15537390
Volume :
9
Issue :
9
Database :
Complementary Index
Journal :
PLoS Genetics
Publication Type :
Academic Journal
Accession number :
90530240
Full Text :
https://doi.org/10.1371/journal.pgen.1003776