Biological Assembly 1  

 3D View: Structure

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 40.38 kDa 
• Atom Count: 1332 
• Modelled Residue Count: 164 
• Deposited 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
• Mutation(s): No 


• 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
• 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.

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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

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Alpha-crystallin B chain	A, B	175	Homo sapiens	Mutation(s): 0  Gene Names: CRYAB, CRYA2, HSPB5
UniProt & NIH Common Fund Data Resources
Find proteins for P02511 (Homo sapiens) Explore P02511  Go to UniProtKB:  P02511
PHAROS:  P02511 GTEx:  ENSG00000109846

Experimental Data & Validation

Experimental Data

• Method: SOLID-STATE NMR
• Conformers Calculated: 200 
• Conformers Submitted: 10 
• Selection Criteria: structures with the lowest energy 
• OLDERADO: 2KLR Olderado

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
  Changes: Version format compliance