Cited by 98Heat shock proteins researchUbiquitin and proteasome pathwaysProtein Degradation and Inhibitors

A bipartite interaction between Hsp70 and CHIP regulates ubiquitination of chaperoned client proteins

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Zhang, Huaqun, Amick, Joseph, Chakravarti, Ritu, Santarriaga, Stephanie, Schlanger, Simon, McGlone, Cameron, Dare, Michelle, Nix, Jay C. +4 more·2015·Structure

Abstract

The ubiquitin ligase CHIP plays an important role in cytosolic protein quality control by ubiquitinating proteins chaperoned by Hsp70/Hsc70 and Hsp90, thereby targeting such substrate proteins for degradation. We present a 2.91 Å resolution structure of the tetratricopeptide repeat (TPR) domain of CHIP in complex with the α-helical lid subdomain and unstructured tail of Hsc70. Surprisingly, the CHIP-TPR interacts with determinants within both the Hsc70-lid subdomain and the C-terminal PTIEEVD motif of the tail, exhibiting an atypical mode of interaction between chaperones and TPR domains. We demonstrate that the interaction between CHIP and the Hsc70-lid subdomain is required for proper ubiquitination of Hsp70/Hsc70 or Hsp70/Hsc70-bound substrate proteins. Posttranslational modifications of the Hsc70 lid and tail disrupt key contacts with the CHIP-TPR and may regulate CHIP-mediated ubiquitination. Our study shows how CHIP docks onto Hsp70/Hsc70 and defines a bipartite mode of interaction between TPR domains and their binding partners.

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Crossref · 10.1016/j.str.2015.01.003

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  • Hsp70 likewise has an unstructured EEVD-connecting linker that may not take part directly in cochaperone interactions.

    “Hsp70 similarly contains an unstructured EEVD-connecting linker that may not participate directly in cochaperone interactions”

    From The structure of an Hsp90-immunophilin complex reveals cochaperone recognition of the client maturation state (2021) · cites this paper as Zhang et al., 2015

    The Introduction describes an unstructured tail preceding Hsp70’s EEVD-containing motif, and the Results report that most residues between the lid and motif are disordered. But the Results also show that the first few tail residues directly contact CHIP’s TPR domain, so the suggestion that the linker may not participate directly needs that qualification. Page numbers are unavailable in our copy. (LLM, conf=0.85)

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Authors
Zhang, H., Amick, J., Chakravarti, R., Santarriaga, S., Schlanger, S., McGlone, C., Dare, M., Nix, J. C., Scaglione, K. M., Stuehr, D. J., Misra, S., & Page, R. C.
Affiliations
  • Miami University (US)
  • Cleveland Clinic (US)
  • Medical College of Wisconsin (US)
  • Lawrence Berkeley National Laboratory (US)
Corresponding author
  • Misra, Saurav
  • Page, Richard C.
Venue
Structure
Publisher
Elsevier BV
Published
2015-03
Volume
23
Issue
3
Pages
472-482
ISSN
0969-2126 (ISSN-L)
OpenAlex
W2075239233
Cited by
98
References
81
Citations by year
2026: 5 · 2025: 10 · 2024: 8 · 2023: 8 · 2022: 14 · 2021: 9 · 2020: 8 · 2019: 7 · 2018: 7 · 2017: 8 · 2016: 12 · 2015: 2
FWCI
4.32
Type
journal article
Language
en
Open access
Locations
  • Structure (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (submittedVersion)
Funders
  • US NIH (R01-GM080271, R00-NS073936, T32-HL007914)
  • Burroughs Wellcome Foundation Collaborative Research Travel (1014031)
  • Miami University
  • Research and Education Program
  • Medical College of Wisconsin
  • US Department of Energy (DE-AC03-76SF00098)
  • Lawrence Berkeley National Laboratory
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Heat shock proteins research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ubiquitin and proteasome pathways
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Degradation and Inhibitors
Keywords
CHIP, HSP70, Hsc70, tetratricopeptide repeat domain, ubiquitination, chaperone-client interactions, protein quality control, protein degradation, post-translational modification, protein complex structure
MeSH terms
Amino Acid Sequence, Animals, Cell Line, Humans, Models, Molecular, Molecular Sequence Data, Protein Binding, Protein Structure, Secondary, Crystallography, X-Ray, Ubiquitin-Protein Ligases, HSC70 Heat-Shock Proteins, Mice, Protein Interaction Domains and Motifs, Ubiquitination

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