Structural basis for Spt5-mediated recruitment of the Paf1 complex to chromatin
Polymerase associated factor 1 complex (Paf1C) broadly influences gene expression by regulating chromatin structure and the recruitment of RNA-processing factors during transcription elongation. The Plus3 domain of the Rtf1 subunit mediates Paf1C recruitment to genes by binding a repeating domain wi...
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Published in | Proceedings of the National Academy of Sciences - PNAS Vol. 110; no. 43; pp. 17290 - 17295 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
United States
National Academy of Sciences
22.10.2013
NATIONAL ACADEMY OF SCIENCES National Acad Sciences |
Subjects | |
Online Access | Get full text |
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Summary: | Polymerase associated factor 1 complex (Paf1C) broadly influences gene expression by regulating chromatin structure and the recruitment of RNA-processing factors during transcription elongation. The Plus3 domain of the Rtf1 subunit mediates Paf1C recruitment to genes by binding a repeating domain within the elongation factor Spt5 (suppressor of Ty). Here we provide a molecular description of this interaction by reporting the structure of human Rtf1 Plus3 in complex with a phosphorylated Spt5 repeat. We find that Spt5 binding is mediated by an extended surface containing phosphothreonine recognition and hydrophobic interfaces that interact with residues outside the Spt5 motif. Changes within these interfaces diminish binding of Spt5 in vitro and chromatin localization of Rtf1 in vivo. The structure reveals the basis for recognition of the repeat motif of Spt5, a key player in the recruitment of gene regulatory factors to RNA polymerase II. |
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Bibliography: | http://dx.doi.org/10.1073/pnas.1314754110 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 Author contributions: A.D.W., M.K.M., K.M.A., and A.P.V. designed research; A.D.W., M.K.M., and A.H. performed research; A.D.W., M.K.M., K.M.A., and A.P.V. analyzed data; and A.D.W., M.K.M., K.M.A., and A.P.V. wrote the paper. Edited by Robert G. Roeder, The Rockefeller University, New York, NY, and approved September 13, 2013 (received for review August 5, 2013) |
ISSN: | 0027-8424 1091-6490 |
DOI: | 10.1073/pnas.1314754110 |