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 1.1 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: 10.1038/nsmb.1891
  • Also Cited By: 2N0K, 3J07

  • 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 struct ...

    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.


    Related Citations: 
    • AlphaB-crystallin: a hybrid solid-state/solution-state NMR investigation reveals structural aspects of the heterogeneous oligomer.
      Jehle, S.,van Rossum, B.,Stout, J.R.,Noguchi, S.M.,Falber, K.,Rehbein, K.,Oschkinat, H.,Klevit, R.E.,Rajagopal, P.
      (2009) J.Mol.Biol. 385: 1481


    Organizational Affiliation

    Leibniz-Institut Für Molekulare Pharmakologie, Berlin, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Alpha-crystallin B chain
A, B
175Homo sapiensGene Names: CRYAB (CRYA2, HSPB5)
Find proteins for P02511 (Homo sapiens)
Go to Gene View: CRYAB
Go to UniProtKB:  P02511
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 or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-07-07
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance