3LCA

Structure of Tom71 complexed with Hsp70 Ssa1 C terminal tail indicating conformational plasticity


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.19 Å
  • R-Value Free: 0.271 
  • R-Value Work: 0.227 
  • R-Value Observed: 0.229 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

The structural plasticity of Tom71 for mitochondrial precursor translocations.

Li, J.Cui, W.Sha, B.

(2010) Acta Crystallogr Sect F Struct Biol Cryst Commun 66: 985-989

  • DOI: 10.1107/S1744309110025522
  • Primary Citation of Related Structures:  
    3LCA

  • PubMed Abstract: 
  • Mitochondrial precursors are transported through the translocase of the outer membrane (TOM) complex. Tom70/Tom71 is a major surface receptor of the TOM complex for mitochondrial precursors and facilitates Hsp70/Hsp90-escorted precursor translocation ...

    Mitochondrial precursors are transported through the translocase of the outer membrane (TOM) complex. Tom70/Tom71 is a major surface receptor of the TOM complex for mitochondrial precursors and facilitates Hsp70/Hsp90-escorted precursor translocation into the mitochondrion. Previous structural studies of Tom71 have revealed that it contains an N-terminal and a C-terminal domain and that the two domains may remain in an open conformation when binding to Hsp70/Hsp90. In a newly obtained crystal form of a complex of Tom71 and the Hsp70 C-terminus, the N-terminal domain was found to have rotated about 12 degrees towards the C-terminal domain compared with the previous determined crystal structure of Tom71 in the open conformation. This newly solved structure is defined as the ;intermediate conformation'. The domain rearrangements in Tom71 significantly change the surface hydrophobicity and the volume of the precursor-binding pocket. This work suggests that Tom70/Tom71-family members may exhibit structural plasticity from the intermediate conformation to the fully open conformation when complexed with Hsp70/Hsp90. This structural plasticity enables the precursor receptors to accommodate different precursor substrates for mitochondrial translocation.


    Organizational Affiliation

    Department of Cell Biology, University of Alabama at Birmingham, Birmingham, AL 35294, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Protein TOM71A533Saccharomyces cerevisiaeMutation(s): 0 
Find proteins for P38825 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P38825 
Go to UniProtKB:  P38825
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Heat shock protein SSA1Q12Saccharomyces cerevisiaeMutation(s): 0 
Find proteins for P10591 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P10591 
Go to UniProtKB:  P10591
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL

Download CCD File 
A
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.19 Å
  • R-Value Free: 0.271 
  • R-Value Work: 0.227 
  • R-Value Observed: 0.229 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 51.148α = 90
b = 97.971β = 90
c = 129.102γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
PHASERphasing
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

  • Deposited Date: 2010-01-10 
  • Released Date: 2010-12-22 
  • Deposition Author(s): Li, J.Z., Sha, B.D.

Revision History 

  • Version 1.0: 2010-12-22
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2018-01-24
    Changes: Structure summary