Experimental Data Snapshot

  • Resolution: 1.20 Å

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This is version 1.4 of the entry. See complete history


An eye lens protein-water structure: 1.2 A resolution structure of gammaB-crystallin at 150 K.

Kumaraswamy, V.S.Lindley, P.F.Slingsby, C.Glover, I.D.

(1996) Acta Crystallogr D Biol Crystallogr 52: 611-622

  • DOI: https://doi.org/10.1107/S0907444995014302
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    gammabeta-crystallin is a structural protein of the eye lens with a role in the maintenance of an even distribution of protein and water over distances around the wavelength of light, preserving lens transparency. The structure of the 174-residue bovine protein has already been determined at room temperature to 1.47 A resolution. By flash freezing the protein crystals, data have now been collected to a nominal resolution limit of 1.2 A as radiation damage was essentially eliminated. The protein-water model has been refined against this data using the program RESTRAIN converging to an R factor of 18.5% with all data. Atomic positions are clearly indicated in the electron-density maps. Discrete bimodal disorder has been visualized for a few side chains. Out of a total of 498 water molecules present in the crystal asymmetric unit, 394 have been modelled and refined at unit occupancy. The solvent structure is extremely well ordered with an average B value of 23.4 A(2). Partially occupied sites have been identified where disorder in the protein induces concomitant disorder in the local solvent structure. The solvent structure covers 97% of the solvent-exposed surface of the protein in the crystal. 126 water molecules are distributed in second and higher hydration shells. There are networks of hydrogen-bonded solvent extending up to 64 molecules in a network, comprising trimers and tetramers as well as five- and six-membered water-ring structures. The hydration of the protein surface is dominated by arginine and aspartate side chains. Extensive cages of highly ordered solvent molecules are also observed around exposed non-polar groups.

  • Organizational Affiliation

    Physics Department, Keele University, Staffordshire, England.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
GAMMA B-CRYSTALLIN174Bos taurusMutation(s): 0 
Find proteins for P02526 (Bos taurus)
Explore P02526 
Go to UniProtKB:  P02526
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP02526
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.20 Å
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 56.43α = 90
b = 56.43β = 90
c = 97.12γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1996-11-08
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2011-11-16
    Changes: Atomic model
  • Version 1.4: 2024-02-07
    Changes: Data collection, Database references, Other