7KW7

Atomic cryoEM structure of Hsp90-Hsp70-Hop-GR


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.57 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structure of Hsp90-Hsp70-Hop-GR reveals the Hsp90 client-loading mechanism.

Wang, R.Y.Noddings, C.M.Kirschke, E.Myasnikov, A.G.Johnson, J.L.Agard, D.A.

(2022) Nature 601: 460-464

  • DOI: 10.1038/s41586-021-04252-1
  • Primary Citation of Related Structures:  
    7KW7

  • PubMed Abstract: 
  • Maintaining a healthy proteome is fundamental for the survival of all organisms 1 . Integral to this are Hsp90 and Hsp70, molecular chaperones that together facilitate the folding, remodelling and maturation of the many 'client proteins' of Hsp90 2 ...

    Maintaining a healthy proteome is fundamental for the survival of all organisms 1 . Integral to this are Hsp90 and Hsp70, molecular chaperones that together facilitate the folding, remodelling and maturation of the many 'client proteins' of Hsp90 2 . The glucocorticoid receptor (GR) is a model client protein that is strictly dependent on Hsp90 and Hsp70 for activity 3-7 . Chaperoning GR involves a cycle of inactivation by Hsp70; formation of an inactive GR-Hsp90-Hsp70-Hop 'loading' complex; conversion to an active GR-Hsp90-p23 'maturation' complex; and subsequent GR release 8 . However, to our knowledge, a molecular understanding of this intricate chaperone cycle is lacking for any client protein. Here we report the cryo-electron microscopy structure of the GR-loading complex, in which Hsp70 loads GR onto Hsp90, uncovering the molecular basis of direct coordination by Hsp90 and Hsp70. The structure reveals two Hsp70 proteins, one of which delivers GR and the other scaffolds the Hop cochaperone. Hop interacts with all components of the complex, including GR, and poises Hsp90 for subsequent ATP hydrolysis. GR is partially unfolded and recognized through an extended binding pocket composed of Hsp90, Hsp70 and Hop, revealing the mechanism of GR loading and inactivation. Together with the GR-maturation complex structure 9 , we present a complete molecular mechanism of chaperone-dependent client remodelling, and establish general principles of client recognition, inhibition, transfer and activation.


    Organizational Affiliation

    Department of Biochemistry and Biophysics, University of California San Francisco, San Francisco, CA, USA. agard@msg.ucsf.edu.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Heat shock protein HSP 90-alphaA, B732Homo sapiensMutation(s): 0 
Gene Names: HSP90AA1HSP90AHSPC1HSPCA
EC: 3.6.4.10
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Find proteins for P07900 (Homo sapiens)
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PHAROS:  P07900
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UniProt GroupP07900
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Heat shock 70 kDa protein 1AC, D641Homo sapiensMutation(s): 0 
Gene Names: HSPA1AHSP72HSPA1HSX70
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Find proteins for P0DMV8 (Homo sapiens)
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PHAROS:  P0DMV8
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UniProt GroupP0DMV8
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Stress-induced-phosphoprotein 1E543Homo sapiensMutation(s): 0 
Gene Names: STIP1
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Find proteins for P31948 (Homo sapiens)
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PHAROS:  P31948
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UniProt GroupP31948
Protein Feature View
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  • Reference Sequence
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Glucocorticoid receptorF777Homo sapiensMutation(s): 1 
Gene Names: NR3C1GRL
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Find proteins for P04150 (Homo sapiens)
Explore P04150 
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PHAROS:  P04150
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UniProt GroupP04150
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  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ADP
Query on ADP

Download Ideal Coordinates CCD File 
G [auth C],
J [auth D]
ADENOSINE-5'-DIPHOSPHATE
C10 H15 N5 O10 P2
XTWYTFMLZFPYCI-KQYNXXCUSA-N
 Ligand Interaction
K
Query on K

Download Ideal Coordinates CCD File 
I [auth C],
L [auth D]
POTASSIUM ION
K
NPYPAHLBTDXSSS-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

Download Ideal Coordinates CCD File 
H [auth C],
K [auth D]
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.57 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Howard Hughes Medical Institute (HHMI)United States--

Revision History  (Full details and data files)

  • Version 1.0: 2021-12-08
    Type: Initial release
  • Version 1.1: 2022-01-26
    Changes: Database references
  • Version 1.2: 2022-02-02
    Changes: Database references