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sNASP and ASF1A function through both competitive and compatible modes of histone binding

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Bowman, Andrew J., Koide, Akiko, Goodman, Jay S., Colling, Meaghan E., Zinne, Daria, Koide, Shohei and Ladurner, Andreas G. (2017) sNASP and ASF1A function through both competitive and compatible modes of histone binding. Nucleic Acids Research, 45 (2). pp. 643-656. doi:10.1093/nar/gkw892

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Official URL: https://doi.org/10.1093/nar/gkw892

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Abstract

Histone chaperones are proteins that interact with histones to regulate the thermodynamic process of nucleosome assembly. sNASP and ASF1 are conserved histone chaperones that interact with histones H3 and H4 and are found in a multi-chaperoning complex in vivo. Previously we identified a short peptide motif within H3 that binds to the TPR domain of sNASP with nanomolar affinity. Interestingly, this peptide motif is sequestered within the known ASF1–H3–H4 interface, raising the question of how these two proteins are found in complex together with histones when they share the same binding site. Here, we show that sNASP contains at least two additional histone interaction sites that, unlike the TPR–H3 peptide interaction, are compatible with ASF1A binding. These surfaces allow ASF1A to form a quaternary complex with both sNASP and H3–H4. Furthermore, we demonstrate that sNASP makes a specific complex with H3 on its own in vitro, but not with H4, suggesting that it could work upstream of ASF1A. Further, we show that sNASP and ASF1A are capable of folding an H3–H4 dimer in vitro under native conditions. These findings reveal a network of binding events that may promote the entry of histones H3 and H4 into the nucleosome assembly pathway.

Item Type: Journal Article
Subjects: Q Science > QP Physiology
Divisions: Faculty of Science, Engineering and Medicine > Medicine > Warwick Medical School > Biomedical Sciences > Cell & Developmental Biology
Faculty of Science, Engineering and Medicine > Medicine > Warwick Medical School > Biomedical Sciences
Faculty of Science, Engineering and Medicine > Medicine > Warwick Medical School
SWORD Depositor: Library Publications Router
Library of Congress Subject Headings (LCSH): Histones, Peptides
Journal or Publication Title: Nucleic Acids Research
Publisher: Oxford University Press
ISSN: 0305-1048
Official Date: 25 January 2017
Dates:
DateEvent
25 January 2017Published
5 October 2016Available
4 October 2016Accepted
Volume: 45
Number: 2
Page Range: pp. 643-656
DOI: 10.1093/nar/gkw892
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Open Access
Funder: European Molecular Biology Organization‏ (EMBO), Marie Curie Intra-European Fellowship (IEF), Wellcome Trust (London, England), Deutsche Forschungsgemeinschaft (DFG), Seventh Framework Programme (European Commission) (FP7), National Institutes of Health (U.S.) (NIH), University of Chicago. Comprehensive Cancer Center
Grant number: ALTF 887-2011 (EMBO), 331726 FP7-PEOPLE-2012-IEF (IEF), WT105627MA (Wellcome Trust (London, England)), EpiGeneSys (FP7), R01-DA036887, P30-CA014599 (NIH)

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