2JB1

The L-amino acid oxidase from Rhodococcus opacus in complex with L- alanine


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.55 Å
  • R-Value Free: 0.167 
  • R-Value Work: 0.143 
  • R-Value Observed: 0.145 

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


Literature

The Structure of a Bacterial L-Amino Acid Oxidase from Rhodococcus Opacus Gives New Evidence for the Hydride Mechanism for Dehydrogenation

Faust, A.Niefind, K.Hummel, W.Schomburg, D.

(2007) J Mol Biol 367: 234

  • DOI: https://doi.org/10.1016/j.jmb.2006.11.071
  • Primary Citation of Related Structures:  
    2JAE, 2JB1, 2JB2, 2JB3

  • PubMed Abstract: 

    l-Amino acid oxidase from Rhodococcus opacus (roLAAO) is classified as a member of the GR(2)-family of flavin-dependent oxidoreductases according to a highly conserved sequence motif for the cofactor binding. The monomer of the homodimeric enzyme consists of three well-defined domains: the FAD-binding domain corresponding to a general topology throughout the whole GR(2)-family; a substrate-binding domain with almost the same topology as the snake venom LAAO and a helical domain exclusively responsible for the unusual dimerisation mode of the enzyme and not found in other members of the family so far. We describe here high-resolution structures of the binary complex of protein and cofactor as well as the ternary complexes of protein, cofactor and ligands. This structures in addition to the structural knowledge of snake venom LAAO and DAAO from yeast and pig kidney permit more insight into different steps in the reaction mechanism of this class of enzymes. There is strong evidence for hydride transfer as the mechanism of dehydrogenation. This mechanism appears to be uncommon in a sense that the chemical transformation can proceed efficiently without the involvement of amino acid functional groups. Most groups present at the active site are involved in substrate recognition, binding and fixation, i.e. they direct the trajectory of the interacting orbitals. In this mode of catalysis orbital steering/interactions are the predominant factors for the chemical step(s). A mirror-symmetrical relationship between the two substrate-binding sites of d and l-amino acid oxidases is observed which facilitates enantiomeric selectivity while preserving a common arrangement of the residues in the active site. These results are of general relevance for the mechanism of flavoproteins and lead to the proposal of a common dehydrogenation step in the mechanism for l and d-amino acid oxidases.


  • Organizational Affiliation

    Universität zu Köln, Institut für Biochemie, Zülpicher Strasse 47, D-50674 Köln, Germany.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
L-AMINO ACID OXIDASE
A, B
489Rhodococcus opacusMutation(s): 0 
EC: 1.4.3.2
UniProt
Find proteins for Q8VPD4 (Rhodococcus opacus)
Explore Q8VPD4 
Go to UniProtKB:  Q8VPD4
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8VPD4
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.55 Å
  • R-Value Free: 0.167 
  • R-Value Work: 0.143 
  • R-Value Observed: 0.145 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 65.9α = 90
b = 109.929β = 90
c = 134.487γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling
MOLREPphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2007-01-30
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2023-12-13
    Changes: Data collection, Database references, Other, Refinement description