Evidence map›Paper›PMID 40234402›Full record

ArticleNature communications2025

Mechanism of client loading from BiP to Grp94 and its disruption by select inhibitors.

Tara P Azam, Jiaqi Han, Erin E Deans, Bin Huang, Reyal Hoxie, Larry J Friedman, Jeff Gelles, Timothy O Street

Abstract read
In one paragraph

Article in Nature communications, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

0numbers the graph read from it
0cells of the map it votes in
2citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

2 citing papers in PubMed.

  1. Review
  2. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors.

Tara P AzamDepartment of Biochemistry at Brandeis University, Waltham, MA, 02453, USA.
Jiaqi HanDepartment of Biochemistry at Brandeis University, Waltham, MA, 02453, USA.
Erin E DeansDepartment of Biochemistry at Brandeis University, Waltham, MA, 02453, USA.
Bin HuangDepartment of Biochemistry at Brandeis University, Waltham, MA, 02453, USA.
Reyal HoxieDepartment of Biochemistry at Brandeis University, Waltham, MA, 02453, USA.
Larry J FriedmanDepartment of Biochemistry at Brandeis University, Waltham, MA, 02453, USA.
Jeff GellesDepartment of Biochemistry at Brandeis University, Waltham, MA, 02453, USA.ORCID http://orcid.org/0000-0001-7910-3421
Timothy O StreetDepartment of Biochemistry at Brandeis University, Waltham, MA, 02453, USA. tstreet@brandeis.edu.ORCID http://orcid.org/0000-0003-2138-3605

Funding

Single-molecule visualization of transcription regulation mechanismsR01GM081648 · NIGMS · BRANDEIS UNIVERSITY · PI JEFF GELLES · 2007 to 2026
$7.4M
Mechanism by which the Grp94 molecular chaperone folds insulin-like growth factorsR01GM115356 · NIGMS · BRANDEIS UNIVERSITY · PI STREET, TIMOTHY OLIVER · 2015 to 2023
$3.2M
Macromolecular Structure, Dynamics, and MechanismT32GM135126 · NIGMS · BRANDEIS UNIVERSITY · PI JEFF GELLES, Douglas Lowell Theobald · 2020 to 2026
$2.1M
Joint Bayesian analysis of single-molecule colocalization images and kineticsR01GM121384 · NIGMS · BRANDEIS UNIVERSITY · PI GELLES, JEFF, THEOBALD, DOUGLAS LOWELL · 2018 to 2021
$1.3M
NIGMS NIH HHS R01 GM081648NIGMS NIH HHS R01 GM115356NIGMS NIH HHS R01 GM121384NIGMS NIH HHS T32 GM135126U.S. Department of Health & Human Services | NIH | National Institute of General Medical Sciences (NIGMS) NIH 5R01GM115356-09U.S. Department of Health & Human Services | NIH | National Institute of General Medical Sciences (NIGMS) NIH R01GM121384U.S. Department of Health & Human Services | NIH | National Institute of General Medical Sciences (NIGMS) NIH R01GM81648
6 · The paper itself

Abstract

Hsp90 chaperones are a long-standing cancer drug target with numerous ATP-competitive inhibitors in clinical trials. Client proteins are transferred from Hsp70 to Hsp90 in a stepwise process of client delivery, loading, and trapping, but little is known about how inhibitors influence these steps. By examining the ER-resident BiP/Grp94 system (Hsp70/Hsp90 paralogs), we discover that some inhibitors allow BiP to push Grp94 into the client loading conformation, whereas other inhibitors block this conformational change and destabilize a BiP/client/Grp94 ternary complex. We uncover how BiP drives Grp94 into the client loading state and identify a structural explanation for why only a select group of inhibitors disrupt client loading on Grp94. These results show a client loading mechanism with specific shared features between the Hsp70/Hsp90 systems in the ER and cytosol and open a new avenue for rational Hsp90 drug design.

Indexed as

Heat-Shock ProteinsHSP70 Heat-Shock ProteinsHSP90 Heat-Shock ProteinsMembrane GlycoproteinsEndoplasmic ReticulumEndoplasmic Reticulum Chaperone BiPHumansMembrane ProteinsProtein BindingProtein ConformationEndoplasmic Reticulum Chaperone BiPendoplasminglucose-regulated proteinsHeat-Shock ProteinsHSP70 Heat-Shock ProteinsHSP90 Heat-Shock ProteinsMembrane GlycoproteinsMembrane Proteins

Identifiers

PMID40234402
PMCPMC12000397

What OpenQuestion holds

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.