2XSM

Crystal structure of the mammalian cytosolic chaperonin CCT in complex with tubulin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 5.50 Å

wwPDB Validation   3D Report Full Report


This is version 1.0 of the entry. See complete history

Re-refinement Note

A newer entry is available that reflects an alternative modeling of the original data: 4B2T


Literature

Crystal Structure of the Open Conformation of the Mammalian Chaperonin Cct in Complex with Tubulin.

Munoz, I.G.Yebenes, H.Zhou, M.Mesa, P.Serna, M.Park, A.Y.Bragado-Nilsson, E.Beloso, A.De Carcer, G.Malumbres, M.Robinson, C.V.Valpuesta, J.M.Montoya, G.

(2011) Nat Struct Mol Biol 18: 14

  • DOI: https://doi.org/10.1038/nsmb.1971
  • Primary Citation of Related Structures:  
    2XSM

  • PubMed Abstract: 

    Protein folding is assisted by molecular chaperones. CCT (chaperonin containing TCP-1, or TRiC) is a 1-MDa oligomer that is built by two rings comprising eight different 60-kDa subunits. This chaperonin regulates the folding of important proteins including actin, α-tubulin and β-tubulin. We used an electron density map at 5.5 Å resolution to reconstruct CCT, which showed a substrate in the inner cavities of both rings. Here we present the crystal structure of the open conformation of this nanomachine in complex with tubulin, providing information about the mechanism by which it aids tubulin folding. The structure showed that the substrate interacts with loops in the apical and equatorial domains of CCT. The organization of the ATP-binding pockets suggests that the substrate is stretched inside the cavity. Our data provide the basis for understanding the function of this chaperonin.


  • Organizational Affiliation

    Macromolecular Crystallography Group, Structural Biology and Biocomputing Programme, Spanish National Cancer Research Centre (CNIO), Madrid, Spain.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
CCT489Bos taurusMutation(s): 0 
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
CCT478Bos taurusMutation(s): 0 
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
CCT455Bos taurusMutation(s): 0 
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
CCT471Bos taurusMutation(s): 0 
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Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
CCT472Bos taurusMutation(s): 0 
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Entity ID: 6
MoleculeChains Sequence LengthOrganismDetailsImage
CCT466Bos taurusMutation(s): 0 
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Entity ID: 7
MoleculeChains Sequence LengthOrganismDetailsImage
CCT485Bos taurusMutation(s): 0 
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Entity ID: 8
MoleculeChains Sequence LengthOrganismDetailsImage
CCT474Bos taurusMutation(s): 0 
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Entity ID: 9
MoleculeChains Sequence LengthOrganismDetailsImage
CCT293Bos taurusMutation(s): 0 
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Entity ID: 10
MoleculeChains Sequence LengthOrganismDetailsImage
CCT299Bos taurusMutation(s): 0 
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Entity ID: 11
MoleculeChains Sequence LengthOrganismDetailsImage
CCT394Bos taurusMutation(s): 0 
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Entity ID: 12
MoleculeChains Sequence LengthOrganismDetailsImage
CCT
L, O
297Bos taurusMutation(s): 0 
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Entity ID: 13
MoleculeChains Sequence LengthOrganismDetailsImage
CCT298Bos taurusMutation(s): 0 
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Entity ID: 14
MoleculeChains Sequence LengthOrganismDetailsImage
CCT289Bos taurusMutation(s): 0 
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Entity ID: 15
MoleculeChains Sequence LengthOrganismDetailsImage
CCT481Bos taurusMutation(s): 0 
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Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 5.50 Å
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 272.7α = 90
b = 313.5β = 90
c = 158.3γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
XSCALEdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-12-15
    Type: Initial release