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Autorepression of Yeast Hsp70 co-chaperones by intramolecular interactions involving their J-domains
Open accessPreprint — published as 10.1016/j.cstres.2024.03.008 · Paper page
Abstract
The Hsp70 chaperones control protein homeostasis in all ATP-containing cellular compartments. J-domain proteins (JDPs) co-evolved with Hsp70s to trigger ATP-hydrolysis and catalytically upload various substrate polypeptides in need to be structurally modified by the chaperone. Here, we measured the protein disaggregation and refolding activities of the main yeast cytosolic Hsp70, Ssa1, in the presence of its most abundant JDPs, Sis1 and Ydj1, and two swap mutants, in which the J-domains have been interchanged. The observed differences by which the four constructs differently cooperate with Ssa1 and cooperate with each other, as well as their observed intrinsic ability to bind misfolded substrates and trigger Ssa1’s ATPase, indicates the presence of yet uncharacterized intra-molecular dynamic interactions between the J-domains and their remaining C-terminal domains. Taken together, the data suggest an auto-regulatory role to these intra-molecular interactions within both type A and B JDPs, which might have evolved to reduce energy-costly ATPase cycles by the Ssa1-4 chaperones that are the most abundant Hsp70s in the yeast cytosol. Graphical abstract: Lower panel: autoinhibited DnaJA or DnaJB dimers, drawn here as Swiss army knives with sequestered J-domains as folded blades, can bind misfolded polypeptides (violet). Upper panel: DnaJA or DnaJB become active when their J-domains are exposed and can bind ATP-Hsp70s, and transfer the misfolded polypeptides, respectively, onto Hsp70’s nucleotide binding (Cyan) and protein binding domains (Orange and Green). Hsp70’s interdomain linker (DLLLLDV, Magenta).
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Metadata
- Authors
- Rebeaud, M. E., Tiwari, S., Fauvet, B., Mohr, A., De Los Rios, P., & Goloubinoff, P.
- Affiliations
- École Polytechnique Fédérale de Lausanne (CH)
- University of Lausanne (CH)
- Corresponding author
- Goloubinoff, Pierre
- Venue
- Cell Stress and Chaperones
- Publisher
- openRxiv
- Published
- 2024-02-05
- Volume
- 29
- Issue
- 2
- Pages
- 338-348
- ISSN
- 1355-8145 (ISSN-L)
- PMC
- PMC10999819
- OpenAlex
- W4393058061
- Cited by
- 6
- References
- 1
- Citations by year
- 2026: 1 · 2025: 5
- FWCI
- 0.82
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- cc-by-nc-nd
- Locations
- Cell Stress and Chaperones (publishedVersion, cc-by-nc-nd)
- bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion, cc-by-nc-nd)
- PubMed Central (publishedVersion, cc-by-nc-nd)
- PubMed (publishedVersion)
- SERVAL (Université de Lausanne) (publishedVersion, cc-by-nc-nd)
- IRIS (submittedVersion, cc-by-nc-nd)
- Infoscience (Ecole Polytechnique Fédérale de Lausanne) (submittedVersion, cc-by-nc-nd)
- Funders
- National Science Foundation
- Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung (200020, 175453, 178763)
- 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 Structure and Dynamics
- Keywords
- Hsp70 chaperones, Hsp40, autorepression, intramolecular interactions, Ssa1, Sis1, Ydj1, protein disaggregation, protein refolding, ATPase activation, ATP hydrolysis, proteostasis
- MeSH terms
- Adenosine Triphosphatases, Adenosine Triphosphate, Protein Binding, Saccharomyces cerevisiae, Molecular Chaperones, HSP70 Heat-Shock Proteins, Saccharomyces cerevisiae Proteins, HSP40 Heat-Shock Proteins
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