Biological Assembly 1  

 3D View: Structure

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Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 121151.58 
• Atom Count: 1332 
• Residue Count: 350 
• Unique protein chains: 1

2KLR

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

• DOI: 10.2210/pdb2KLR/pdb

• Classification: CHAPERONE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli


• Deposited: 2009-07-08 Released: 2010-07-07 
• Deposition Author(s): Jehle, S., Rajagopal, P., Markovic, S., Bardiaux, B., Kuehne, R., Higman, V.A., Klevit, R.E., van Rossum, B., Oschkinat, H.

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Experimental Data Snapshot

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

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

• PubMed: 20802487 
• DOI: 10.1038/nsmb.1891
• Also Cited By: 3J07, 2N0K


• 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.

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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




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Organizational Affiliation: 

Leibniz-Institut Für Molekulare Pharmakologie, Berlin, Germany.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Alpha-crystallin B chain	A, B	175	Homo sapiens	Mutation(s): 0  Gene 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

Entry History 

Deposition Data

• Deposited Date: 2009-07-08 
• Released Date: 2010-07-07 
• Deposition Author(s): Jehle, S., Rajagopal, P., Markovic, S., Bardiaux, B., Kuehne, R., Higman, V.A., Klevit, R.E., van Rossum, B., Oschkinat, H.

Revision History 

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