1LEH

LEUCINE DEHYDROGENASE FROM BACILLUS SPHAERICUS


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Work: 0.201 

wwPDB Validation   3D Report Full Report


This is version 1.5 of the entry. See complete history


Literature

A role for quaternary structure in the substrate specificity of leucine dehydrogenase.

Baker, P.J.Turnbull, A.P.Sedelnikova, S.E.Stillman, T.J.Rice, D.W.

(1995) Structure 3: 693-705

  • DOI: https://doi.org/10.1016/s0969-2126(01)00204-0
  • Primary Citation of Related Structures:  
    1LEH

  • PubMed Abstract: 

    Glutamate, phenylalanine and leucine dehydrogenases catalyze the NAD(P)(+)-linked oxidative deamination of L-amino acids to the corresponding 2-oxoacids, and sequence homology between these enzymes clearly indicates the existence of an enzyme superfamily related by divergent evolution. We have undertaken structural studies on a number of members of this family in order to investigate the molecular basis of their differential amino acid specificity. We have solved the X-ray structure of the leucine dehydrogenase from Bacillus sphaericus to a resolution of 2.2 A. Each subunit of this octameric enzyme contains 364 amino acids and folds into two domains, separated by a deep cleft. The nicotinamide ring of the NAD+ cofactor binds deep in this cleft, which is thought to close during the hydride transfer step of the catalytic cycle. Comparison of the structure of leucine dehydrogenase with a hexameric glutamate dehydrogenase has shown that these two enzymes share a related fold and possess a similar catalytic chemistry. A mechanism for the basis of the differential amino acid specificity between these enzymes involves point mutations in the amino acid side-chain specificity pocket and subtle changes in the shape of this pocket caused by the differences in quaternary structure.


  • Organizational Affiliation

    Krebs Institute for Biomolecular Research, Department of Molecular Biology and Biotechnology, University of Sheffield, UK.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
LEUCINE DEHYDROGENASE
A, B
364Lysinibacillus sphaericusMutation(s): 0 
EC: 1.4.1.9
UniProt
Find proteins for Q7SIB4 (Lysinibacillus sphaericus)
Explore Q7SIB4 
Go to UniProtKB:  Q7SIB4
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ7SIB4
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Work: 0.201 
  • Space Group: I 4
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 138.4α = 90
b = 138.4β = 90
c = 121.3γ = 90
Software Package:
Software NamePurpose
TNTrefinement
MOSFLMdata reduction

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1996-12-23
    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: 2017-10-25
    Changes: Author supporting evidence, Other
  • Version 1.4: 2018-03-21
    Changes: Data collection
  • Version 1.5: 2024-02-14
    Changes: Data collection, Database references