2YGD

Molecular architectures of the 24meric eye lens chaperone alphaB- crystallin elucidated by a triple hybrid approach


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 9.4 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Multiple Molecular Architectures of the Eye Lens Chaperone Alpha Beta-Crystallin Elucidated by a Triple Hybrid Approach

Braun, N.Zacharias, M.Peschek, J.Kastenmueller, A.Zou, J.Hanzlik, M.Haslbeck, M.Rappsilber, J.Buchner, J.Weinkauf, S.

(2011) Proc.Natl.Acad.Sci.USA 108: 20491

  • DOI: 10.1073/pnas.1111014108

  • PubMed Abstract: 
  • The molecular chaperone αB-crystallin, the major player in maintaining the transparency of the eye lens, prevents stress-damaged and aging lens proteins from aggregation. In nonlenticular cells, it is involved in various neurological diseases, diabet ...

    The molecular chaperone αB-crystallin, the major player in maintaining the transparency of the eye lens, prevents stress-damaged and aging lens proteins from aggregation. In nonlenticular cells, it is involved in various neurological diseases, diabetes, and cancer. Given its structural plasticity and dynamics, structure analysis of αB-crystallin presented hitherto a formidable challenge. Here we present a pseudoatomic model of a 24-meric αB-crystallin assembly obtained by a triple hybrid approach combining data from cryoelectron microscopy, NMR spectroscopy, and structural modeling. The model, confirmed by cross-linking and mass spectrometry, shows that the subunits interact within the oligomer in different, defined conformations. We further present the molecular architectures of additional well-defined αB-crystallin assemblies with larger or smaller numbers of subunits, provide the mechanism how "heterogeneity" is achieved by a small set of defined structural variations, and analyze the factors modulating the oligomer equilibrium of αB-crystallin and thus its chaperone activity.


    Organizational Affiliation

    Center for Integrated Protein Science Munich, Chemistry Department, Technische Universität München, Lichtenbergstrasse 4, 85747 Garching, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ALPHA-CRYSTALLIN B CHAIN
A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X
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: ELECTRON MICROSCOPY
  • Resolution: 9.4 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-12-07
    Type: Initial release
  • Version 1.1: 2012-01-11
    Type: Other
  • Version 1.2: 2013-11-20
    Type: Source and taxonomy