Cited by 119Heat shock proteins researchBacterial Genetics and BiotechnologyProtein Structure and Dynamics

Uncovering a region of heat shock protein 90 important for client binding in E. coli and chaperone function in yeast

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Genest, Olivier, Reidy, Michael, Street, Timothy O., Hoskins, Joel R., Camberg, Jodi L., Agard, David A., Masison, Daniel C., Wickner, Sue·2013·Molecular Cell

Abstract

The heat shock protein 90 (Hsp90) family of heat shock proteins is an abundantly expressed and highly conserved family of ATP-dependent molecular chaperones. Hsp90 facilitates remodeling and activation of hundreds of proteins. In this study, we developed a screen to identify Hsp90-defective mutants in E. coli. The mutations obtained define a region incorporating residues from the middle and C-terminal domains of E. coli Hsp90. The mutant proteins are defective in chaperone activity and client binding in vitro. We constructed homologous mutations in S. cerevisiae Hsp82 and identified several that caused defects in chaperone activity in vivo and in vitro. However, the Hsp82 mutant proteins were less severely defective in client binding to a model substrate than the corresponding E. coli mutant proteins. Our results identify a region in Hsp90 important for client binding in E. coli Hsp90 and suggest an evolutionary divergence in the mechanism of client interaction by bacterial and yeast Hsp90.

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Crossref · 10.1016/j.molcel.2012.11.017

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  • The FK1 pocket sits roughly 17 Å away from the Hsp90 client-binding sites Y528, Q531 and M610.

    “This pocket is approximately 17 Å from Hsp90 client binding sites, which include Y528, Q531, and M610”

    From The structure of an Hsp90-immunophilin complex reveals cochaperone recognition of the client maturation state (2021) · cites this paper as Genest et al., 2013

    The Discussion (page unavailable) identifies a client-binding region of Hsp90, supporting that general part of the claim. Our copy does not identify Y528, Q531, or M610 as client-binding sites or give an approximately 17 Å distance from an FK1 pocket (searched those residues, FK1, and the distance). (LLM, conf=0.78)

    Experimental — accuracy not yet measured
  • In the Hsp90:FKBP51:p23 structure, FKBP51 runs from its CTD-TPR contact along the Hsp90 middle domain, placing the N-terminal FK1 domain next to the sites where Hsp90 engages clients.

    “In the Hsp90:FKBP51:p23 structure FKBP51 extends from the CTD-TPR interaction along the Hsp90 MD, enabling the N-terminal FK1 domain to be positioned adjacent Hsp90 client interaction sites”

    From The structure of an Hsp90-immunophilin complex reveals cochaperone recognition of the client maturation state (2021) · cites this paper as Genest et al., 2013

    The Discussion identifies an Hsp90 client-binding region in its middle and C-terminal domains, supporting the reference to client-interaction sites. It does not describe an Hsp90:FKBP51:p23 structure or establish that FKBP51’s FK1 domain sits next to those sites; its identified region is specifically in E. coli Hsp90. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • Mutations in the Cα2 element or its surroundings impair GR activation in vitro and in vivo.

    “This is consistent with the fact that mutations in this element or its surroundings have been shown to impair GR activation in vitro and in vivo (2, 60, 62).”
  • These sites are extended and harbor short amphipathic binding motifs: 423KNIKLG428, 505IDEY508, 554LKEIL558, and 589MERIM593.

    “These sites are extended and harbor short amphipathic binding motifs, i.e., 423KNIKLG428, 505IDEY508, 554LKEIL558, and 589MERIM593, which, in part, have been implicated in client binding in vivo (60–62).”

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Authors
Genest, O., Reidy, M., Street, T. O., Hoskins, J. R., Camberg, J. L., Agard, D. A., Masison, D. C., & Wickner, S.
Affiliations
  • National Institutes of Health (US)
  • University of California, San Francisco (US)
  • Howard Hughes Medical Institute (US)
Corresponding author
Wickner, Sue
Venue
Molecular Cell
Publisher
Elsevier BV
Published
2013-02
Volume
49
Issue
3
Pages
464-473
ISSN
1097-2765 (ISSN-L)
OpenAlex
W2109982971
Cited by
118
References
47
Citations by year
2026: 1 · 2025: 5 · 2024: 5 · 2023: 7 · 2022: 10 · 2021: 10 · 2020: 12 · 2019: 8 · 2018: 13 · 2017: 13 · 2016: 5 · 2015: 10 · 2014: 12 · 2013: 7
FWCI
3.73
Type
journal article
Language
en
Open access
Locations
  • Molecular Cell (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • eScholarship (California Digital Library) (submittedVersion)
Funders
  • Howard Hughes Medical Institute
  • National Institutes of Health
  • National Cancer Institute (ZIABC008710)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Heat shock proteins research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Bacterial Genetics and Biotechnology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Structure and Dynamics
Keywords
HSP90, molecular chaperones, Hsp82, chaperone activity, evolutionary divergence, Escherichia coli, Saccharomyces cerevisiae, ATP-dependent chaperones
MeSH terms
Amino Acid Sequence, Amino Acids, Escherichia coli, Molecular Sequence Data, Mutation, Protein Binding, Saccharomyces cerevisiae, Structure-Activity Relationship, Protein Structure, Tertiary, HSP90 Heat-Shock Proteins, Saccharomyces cerevisiae Proteins, Escherichia coli Proteins, Mutant Proteins

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