4BLC

THE STRUCTURE OF ORTHORHOMBIC CRYSTALS OF BEEF LIVER CATALASE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.205 
  • R-Value Observed: 0.205 

Starting Model: experimental
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This is version 1.3 of the entry. See complete history


Literature

Structure of orthorhombic crystals of beef liver catalase.

Ko, T.P.Day, J.Malkin, A.J.McPherson, A.

(1999) Acta Crystallogr D Biol Crystallogr 55: 1383-1394

  • DOI: https://doi.org/10.1107/s0907444999007052
  • Primary Citation of Related Structures:  
    4BLC

  • PubMed Abstract: 

    The growth mechanisms and physical properties of the orthorhombic crystal form of beef liver catalase were investigated using in situ atomic force microscopy (AFM). It was observed that the crystals grow in the <001> direction by an unusual progression of sequential two-dimensional nuclei of half unit-cell layers corresponding to the 'bottoms' and 'tops' of unit cells. These were easily discriminated by their alternating asymmetric shapes and their strong growth-rate anisotropy. This pattern has not previously been observed with other macromolecular crystals. Orthorhombic beef liver catalase crystals exhibit an extremely high defect density and incorporate great numbers of misoriented microcrystals, revealed intact by etching experiments, which may explain their marginal diffraction properties. To facilitate interpretation of AFM results in terms of intermolecular interactions, the structure of the orthorhombic crystals, having an entire tetramer of the enzyme as the asymmetric unit, was solved by molecular replacement using a model derived from a trigonal crystal form. It was subsequently refined by conventional techniques. Although the packing of molecules in the two unit cells was substantially different, with very few exceptions no significant differences in the molecular structures were observed. In addition, no statistically significant deviation from ideal 222 molecular symmetry appeared within the tetramer. The packing of molecules in the crystal revealed by X-ray analysis explained in a satisfying way the process of crystal growth revealed by AFM.


  • Organizational Affiliation

    Institute of Molecular Biology, Academia Sinica, Taipei 11529, Taiwan.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
PROTEIN (CATALASE)
A, B, C, D
506Bos taurusMutation(s): 0 
EC: 1.11.1.6
UniProt
Find proteins for P00432 (Bos taurus)
Explore P00432 
Go to UniProtKB:  P00432
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP00432
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.205 
  • R-Value Observed: 0.205 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 87.8α = 90
b = 140.6β = 90
c = 232.4γ = 90
Software Package:
Software NamePurpose
MERLOTphasing
X-PLORrefinement
SDMSdata reduction
SDMSdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1998-10-14
    Type: Initial release
  • Version 1.1: 2007-10-16
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance
  • Version 1.3: 2023-09-13
    Changes: Data collection, Database references, Derived calculations, Refinement description