6T1R

Pseudo-atomic model of a 16-mer assembly of reduced recombinant human alphaA-crystallin (non domain swapped configuration)


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 9.80 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

The structure and oxidation of the eye lens chaperone alpha A-crystallin.

Kaiser, C.J.O.Peters, C.Schmid, P.W.N.Stavropoulou, M.Zou, J.Dahiya, V.Mymrikov, E.V.Rockel, B.Asami, S.Haslbeck, M.Rappsilber, J.Reif, B.Zacharias, M.Buchner, J.Weinkauf, S.

(2019) Nat Struct Mol Biol 26: 1141-1150

  • DOI: 10.1038/s41594-019-0332-9
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • The small heat shock protein αA-crystallin is a molecular chaperone important for the optical properties of the vertebrate eye lens. It forms heterogeneous oligomeric ensembles. We determined the structures of human αA-crystallin oligomers by combini ...

    The small heat shock protein αA-crystallin is a molecular chaperone important for the optical properties of the vertebrate eye lens. It forms heterogeneous oligomeric ensembles. We determined the structures of human αA-crystallin oligomers by combining cryo-electron microscopy, cross-linking/mass spectrometry, NMR spectroscopy and molecular modeling. The different oligomers can be interconverted by the addition or subtraction of tetramers, leading to mainly 12-, 16- and 20-meric assemblies in which interactions between N-terminal regions are important. Cross-dimer domain-swapping of the C-terminal region is a determinant of αA-crystallin heterogeneity. Human αA-crystallin contains two cysteines, which can form an intramolecular disulfide in vivo. Oxidation in vitro requires conformational changes and oligomer dissociation. The oxidized oligomers, which are larger than reduced αA-crystallin and destabilized against unfolding, are active chaperones and can transfer the disulfide to destabilized substrate proteins. The insight into the structure and function of αA-crystallin provides a basis for understanding its role in the eye lens.


    Organizational Affiliation

    Center for Integrated Protein Science Munich at the Department Chemie, Technische Universität München, Garching, Germany. sevil.weinkauf@tum.de.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Alpha-crystallin A chain
A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P
173Homo sapiensMutation(s): 0 
Gene Names: CRYAACRYA1HSPB4
Find proteins for P02489 (Homo sapiens)
Go to UniProtKB:  P02489
NIH Common Fund Data Resources
PHAROS  P02489
Protein Feature View
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 9.80 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
German Research FoundationGermanyCRC 1035
German Research FoundationGermanyEXC 114

Revision History 

  • Version 1.0: 2019-12-11
    Type: Initial release
  • Version 1.1: 2019-12-18
    Changes: Database references