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PXD027413

PXD027413 is an original dataset announced via ProteomeXchange.

Dataset Summary
TitleA direct interplay between the co-chaperones Hop and p23 regulates cycle progression and client folding in the Hsp70/Hsp90 chaperone machineries
DescriptionFolding of stringent clients requires transfer from Hsp70 to Hsp90. The co-chaperone Hop physically connects the chaperone machineries. Here we define its role from the remodeling of Hsp70/40-client complexes to the mechanism of client transfer and the conformational switching from stalled to active client-processing states of Hsp90. We show that Hsp70 together with Hsp40 completely unfolds a stringent client, the glucocorticoid receptor ligand binding domain (GR-LBD) in large assemblies. Hop remodels these for efficient transfer onto Hsp90. As p23 enters, Hsp70 leaves the complex via switching between binding sites in Hop. To proceed to client folding, current concepts assume that Hop dissociates and the co-chaperone p23 stabilizes the Hsp90 closed state. In contrast, we show that p23 directly interacts with Hop, relieves the stalling Hsp90-Hop interaction and closes Hsp90. This reaction allows folding of the client and is thus the key regulatory step for the progression of the chaperone cycle. To study the interaction between the different proteins, especially p23 and the DP2 domain of Hop, we performed crosslinking-MS.
HostingRepositoryPRIDE
AnnounceDate2022-02-24
AnnouncementXMLSubmission_2022-02-24_15:23:32.058.xml
DigitalObjectIdentifier
ReviewLevelPeer-reviewed dataset
DatasetOriginOriginal dataset
RepositorySupportUnsupported dataset by repository
PrimarySubmitterMoritz Mühlhofer
SpeciesList scientific name: Homo sapiens (Human); NCBI TaxID: 9606; scientific name: Saccharomyces cerevisiae (Baker's yeast); NCBI TaxID: 4932;
ModificationListiodoacetamide derivatized residue
InstrumentOrbitrap Fusion
Dataset History
RevisionDatetimeStatusChangeLog Entry
02021-07-19 05:30:02ID requested
12022-02-24 15:23:32announced
Publication List
Dataset with its publication pending
Keyword List
submitter keyword: Hsp90, Hsp70, p23, Hop
Contact List
Johannes Buchner
contact affiliationCenter for Protein Assemblies, Department of Chemistry, Technische Universität München, Ernst-Otto-Fischer Str. 8, 85747 Garching, Germany
contact emailjohannes.buchner@tum.de
lab head
Moritz Mühlhofer
contact affiliationDept. Chemie Lichtenbergstraße 4 85748 Garching
contact emailmoritz.muehlhofer@tum.de
dataset submitter
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Dataset FTP location
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