Architecture of the chromatin remodeler RSC and insights into its nucleosome engagement
Abstract
Eukaryotic DNA is packaged into nucleosome arrays, which are repositioned by chromatin remodeling complexes to control DNA accessibility. The Saccharomyces cerevisiae RSC (Remodeling the Structure of Chromatin) complex, a member of the SWI/SNF chromatin remodeler family, plays critical roles in genome maintenance, transcription, and DNA repair. Here, we report cryo-electron microscopy (cryo-EM) and crosslinking mass spectrometry (CLMS) studies of yeast RSC complex and show that RSC is composed of a rigid tripartite core and two flexible lobes. The core structure is scaffolded by an asymmetric Rsc8 dimer and built with the evolutionarily conserved subunits Sfh1, Rsc6, Rsc9 and Sth1. The flexible ATPase lobe, composed of helicase subunit Sth1, Arp7, Arp9 and Rtt102, is anchored to this core by the N-terminus of Sth1. Our cryo-EM analysis of RSC bound to a nucleosome core particle shows that in addition to the expected nucleosome-Sth1 interactions, RSC engages histones and nucleosomal DNA through one arm of the core structure, composed of the Rsc8 SWIRM domains, Sfh1 and Npl6. Our findings provide structural insights into the conserved assembly process for all members of the SWI/SNF family of remodelers, and illustrate how RSC selects, engages, and remodels nucleosomes.
- Authors:
-
[1];
[1];
[1]
- Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Univ. of California, Berkeley, CA (United States)
- The Inst. for Systems Biology, Seattle, WA (United States)
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Biological and Environmental Research (BER); National Institutes of Health (NIH); National Institute of General Medical Sciences (NIGMS)
- OSTI Identifier:
- 1599828
- Grant/Contract Number:
- AC02-05CH11231; U24GM129547; R01-GM63072; R35-GM127018; R01-GM110064; R01-HL133678
- Resource Type:
- Accepted Manuscript
- Journal Name:
- eLife
- Additional Journal Information:
- Journal Volume: 8; Journal ID: ISSN 2050-084X
- Publisher:
- eLife Sciences Publications, Ltd.
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 59 BASIC BIOLOGICAL SCIENCES; structural biology and molecular biophysics; cryo-em; chromatin; transcription; chromatin remodeling
Citation Formats
Patel, Avinash B., Moore, Camille M., Greber, Basil J., Luo, Jie, Zukin, Stefan A., Ranish, Jeff, and Nogales, Eva. Architecture of the chromatin remodeler RSC and insights into its nucleosome engagement. United States: N. p., 2019.
Web. doi:10.7554/eLife.54449.
Patel, Avinash B., Moore, Camille M., Greber, Basil J., Luo, Jie, Zukin, Stefan A., Ranish, Jeff, & Nogales, Eva. Architecture of the chromatin remodeler RSC and insights into its nucleosome engagement. United States. https://doi.org/10.7554/eLife.54449
Patel, Avinash B., Moore, Camille M., Greber, Basil J., Luo, Jie, Zukin, Stefan A., Ranish, Jeff, and Nogales, Eva. Mon .
"Architecture of the chromatin remodeler RSC and insights into its nucleosome engagement". United States. https://doi.org/10.7554/eLife.54449. https://www.osti.gov/servlets/purl/1599828.
@article{osti_1599828,
title = {Architecture of the chromatin remodeler RSC and insights into its nucleosome engagement},
author = {Patel, Avinash B. and Moore, Camille M. and Greber, Basil J. and Luo, Jie and Zukin, Stefan A. and Ranish, Jeff and Nogales, Eva},
abstractNote = {Eukaryotic DNA is packaged into nucleosome arrays, which are repositioned by chromatin remodeling complexes to control DNA accessibility. The Saccharomyces cerevisiae RSC (Remodeling the Structure of Chromatin) complex, a member of the SWI/SNF chromatin remodeler family, plays critical roles in genome maintenance, transcription, and DNA repair. Here, we report cryo-electron microscopy (cryo-EM) and crosslinking mass spectrometry (CLMS) studies of yeast RSC complex and show that RSC is composed of a rigid tripartite core and two flexible lobes. The core structure is scaffolded by an asymmetric Rsc8 dimer and built with the evolutionarily conserved subunits Sfh1, Rsc6, Rsc9 and Sth1. The flexible ATPase lobe, composed of helicase subunit Sth1, Arp7, Arp9 and Rtt102, is anchored to this core by the N-terminus of Sth1. Our cryo-EM analysis of RSC bound to a nucleosome core particle shows that in addition to the expected nucleosome-Sth1 interactions, RSC engages histones and nucleosomal DNA through one arm of the core structure, composed of the Rsc8 SWIRM domains, Sfh1 and Npl6. Our findings provide structural insights into the conserved assembly process for all members of the SWI/SNF family of remodelers, and illustrate how RSC selects, engages, and remodels nucleosomes.},
doi = {10.7554/eLife.54449},
journal = {eLife},
number = ,
volume = 8,
place = {United States},
year = {Mon Dec 30 00:00:00 EST 2019},
month = {Mon Dec 30 00:00:00 EST 2019}
}
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