2KLR

Solid-state NMR structure of the alpha-crystallin domain in alphaB-crystallin oligomers


Experimental Data Snapshot

  • Method: SOLID-STATE NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 10 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Solid-state NMR and SAXS studies provide a structural basis for the activation of alphaB-crystallin oligomers.

Jehle, S.Rajagopal, P.Bardiaux, B.Markovic, S.Kuhne, R.Stout, J.R.Higman, V.A.Klevit, R.E.van Rossum, B.J.Oschkinat, H.

(2010) Nat Struct Mol Biol 17: 1037-1042

  • DOI: https://doi.org/10.1038/nsmb.1891
  • Primary Citation of Related Structures:  
    2KLR

  • PubMed Abstract: 

    The small heat shock protein alphaB-crystallin (alphaB) contributes to cellular protection against stress. For decades, high-resolution structural studies on oligomeric alphaB have been confounded by its polydisperse nature. Here, we present a structural basis of oligomer assembly and activation of the chaperone using solid-state NMR and small-angle X-ray scattering (SAXS). The basic building block is a curved dimer, with an angle of approximately 121 degrees between the planes of the beta-sandwich formed by alpha-crystallin domains. The highly conserved IXI motif covers a substrate binding site at pH 7.5. We observe a pH-dependent modulation of the interaction of the IXI motif with beta4 and beta8, consistent with a pH-dependent regulation of the chaperone function. N-terminal region residues Ser59-Trp60-Phe61 are involved in intermolecular interaction with beta3. Intermolecular restraints from NMR and volumetric restraints from SAXS were combined to calculate a model of a 24-subunit alphaB oligomer with tetrahedral symmetry.


  • Organizational Affiliation

    Leibniz-Institut Für Molekulare Pharmakologie, Berlin, Germany.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Alpha-crystallin B chain
A, B
175Homo sapiensMutation(s): 0 
Gene Names: CRYABCRYA2
UniProt & NIH Common Fund Data Resources
Find proteins for P02511 (Homo sapiens)
Explore P02511 
Go to UniProtKB:  P02511
PHAROS:  P02511
GTEx:  ENSG00000109846 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP02511
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLID-STATE NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 10 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-07-07
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2024-05-01
    Changes: Data collection, Database references