6MRD

ADP-bound human mitochondrial Hsp60-Hsp10 half-football complex


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.82 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

Structural basis for active single and double ring complexes in human mitochondrial Hsp60-Hsp10 chaperonin.

Gomez-Llorente, Y.Jebara, F.Patra, M.Malik, R.Nisemblat, S.Chomsky-Hecht, O.Parnas, A.Azem, A.Hirsch, J.A.Ubarretxena-Belandia, I.

(2020) Nat Commun 11: 1916-1916

  • DOI: 10.1038/s41467-020-15698-8
  • Primary Citation of Related Structures:  
    6MRC, 6MRD

  • PubMed Abstract: 
  • mHsp60-mHsp10 assists the folding of mitochondrial matrix proteins without the negative ATP binding inter-ring cooperativity of GroEL-GroES. Here we report the crystal structure of an ATP (ADP:BeF 3 -bound) ground-state mimic double-ring mHsp60 14 -(mHsp10 7 ) 2 football complex, and the cryo-EM structures of the ADP-bound successor mHsp60 14 -(mHsp10 7 ) 2 complex, and a single-ring mHsp60 7 -mHsp10 7 half-football ...

    mHsp60-mHsp10 assists the folding of mitochondrial matrix proteins without the negative ATP binding inter-ring cooperativity of GroEL-GroES. Here we report the crystal structure of an ATP (ADP:BeF 3 -bound) ground-state mimic double-ring mHsp60 14 -(mHsp10 7 ) 2 football complex, and the cryo-EM structures of the ADP-bound successor mHsp60 14 -(mHsp10 7 ) 2 complex, and a single-ring mHsp60 7 -mHsp10 7 half-football. The structures explain the nucleotide dependence of mHsp60 ring formation, and reveal an inter-ring nucleotide symmetry consistent with the absence of negative cooperativity. In the ground-state a two-fold symmetric H-bond and a salt bridge stitch the double-rings together, whereas only the H-bond remains as the equatorial gap increases in an ADP football poised to split into half-footballs. Refolding assays demonstrate obligate single- and double-ring mHsp60 variants are active, and complementation analysis in bacteria shows the single-ring variant is as efficient as wild-type mHsp60. Our work provides a structural basis for active single- and double-ring complexes coexisting in the mHsp60-mHsp10 chaperonin reaction cycle.


    Organizational Affiliation

    Ikerbasque, Basque Foundation for Science, 48013, Bilbao, Spain. iban.ubarretxena@gmail.com.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
60 kDa heat shock protein, mitochondrial528Homo sapiensMutation(s): 0 
Gene Names: HSPD1HSP60
EC: 3.6.4.9 (PDB Primary Data), 5.6.1.7 (UniProt)
UniProt & NIH Common Fund Data Resources
Find proteins for P10809 (Homo sapiens)
Explore P10809 
Go to UniProtKB:  P10809
PHAROS:  P10809
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP10809
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
10 kDa heat shock protein, mitochondrial100Homo sapiensMutation(s): 0 
Gene Names: HSPE1
UniProt & NIH Common Fund Data Resources
Find proteins for P61604 (Homo sapiens)
Explore P61604 
Go to UniProtKB:  P61604
PHAROS:  P61604
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP61604
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.82 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
United States - Israel Binational Science Foundation (BSF)United States--

Revision History  (Full details and data files)

  • Version 1.0: 2020-04-15
    Type: Initial release
  • Version 1.1: 2020-05-06
    Changes: Database references
  • Version 1.2: 2020-07-08
    Changes: Structure summary