1POW

THE REFINED STRUCTURES OF A STABILIZED MUTANT AND OF WILD-TYPE PYRUVATE OXIDASE FROM LACTOBACILLUS PLANTARUM


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Work: 0.198 
  • R-Value Observed: 0.198 

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This is version 1.3 of the entry. See complete history


Literature

The refined structures of a stabilized mutant and of wild-type pyruvate oxidase from Lactobacillus plantarum.

Muller, Y.A.Schumacher, G.Rudolph, R.Schulz, G.E.

(1994) J Mol Biol 237: 315-335

  • DOI: https://doi.org/10.1006/jmbi.1994.1233
  • Primary Citation of Related Structures:  
    1POW, 1POX

  • PubMed Abstract: 

    The crystal structure of pyruvate oxidase (EC 1.2.3.3) from Lactobacillus plantarum stabilized by three point mutations has been refined at 2.1 A resolution using the simulated annealing method. Based on 87,775 independent reflections in the resolution range 10 to 2.1 A, a final R-factor of 16.2% was obtained at good model geometry. The wild-type enzyme crystallizes isomorphously with the stabilized enzyme and has been analyzed at 2.5 A resolution. Pyruvate oxidase is a homotetramer with point group symmetry D2. One 2-fold axis is crystallographic, the others are local. The crystallographic asymmetric unit contains two subunits, and the model consists of the two polypeptide chains (residues 9 through 593), two FAD, two ThDP*Mg2+ and 739 water molecules. Each subunit has three domains; the CORE domain, the FAD domain and the ThDP domain. The FAD-binding chain fold is different from those of other known flavoproteins, whereas the ThDP-binding chain fold resembles the corresponding folds of the two other ThDP enzymes whose structure is known, transketolase and pyruvate decarboxylase. The peptide environment most likely forces the pyrimidine ring of ThDP into an unusual tautomeric form, which is required for catalysis. The structural differences between the wild-type and the stabilized enzyme are small. All three point mutations are at or near to the subunit interfaces, indicating that they stabilize the quarternary structure as had been deduced from reconstitution experiments.


  • Organizational Affiliation

    Institut für Organische Chemie und Biochemie, Albert-Ludwigs-Universität, Freiburg, Germany.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
PYRUVATE OXIDASE
A, B
585Lactiplantibacillus plantarumMutation(s): 0 
EC: 1.2.3.3
UniProt
Find proteins for P37063 (Lactiplantibacillus plantarum (strain ATCC BAA-793 / NCIMB 8826 / WCFS1))
Explore P37063 
Go to UniProtKB:  P37063
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP37063
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Work: 0.198 
  • R-Value Observed: 0.198 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 121.6α = 90
b = 155.4β = 90
c = 167.1γ = 90
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
X-PLORphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1994-01-31
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance
  • Version 1.3: 2024-02-14
    Changes: Data collection, Database references, Derived calculations, Other