4OTT

Crystal structure of the gamma-glutamyltranspeptidase from Bacillus licheniformis.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.98 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.191 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Low resolution X-ray structure of gamma-glutamyltranspeptidase from Bacillus licheniformis: Opened active site cleft and a cluster of acid residues potentially involved in the recognition of a metal ion.

Lin, L.L.Chen, Y.Y.Chi, M.C.Merlino, A.

(2014) Biochim.Biophys.Acta 1844: 1523-1529

  • DOI: 10.1016/j.bbapap.2014.04.016
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • γ-Glutamyltranspeptidases (γ-GTs) cleave the γ-glutamyl amide bond of glutathione and transfer the released γ-glutamyl group to water (hydrolysis) or acceptor amino acids (transpeptidation). These ubiquitous enzymes play a key role in the biosynthesi ...

    γ-Glutamyltranspeptidases (γ-GTs) cleave the γ-glutamyl amide bond of glutathione and transfer the released γ-glutamyl group to water (hydrolysis) or acceptor amino acids (transpeptidation). These ubiquitous enzymes play a key role in the biosynthesis and degradation of glutathione, and in xenobiotic detoxification. Here we report the 3Å resolution crystal structure of Bacillus licheniformis γ-GT (BlGT) and that of its complex with l-Glu. X-ray structures confirm that BlGT belongs to the N-terminal nucleophilic hydrolase superfamily and reveal that the protein possesses an opened active site cleft similar to that reported for the homologous enzyme from Bacillus subtilis, but different from those observed for human γ-GT and for γ-GTs from other microorganisms. Data suggest that the binding of l-Glu induces a reordering of the C-terminal tail of BlGT large subunit and allow the identification of a cluster of acid residues that are potentially involved in the recognition of a metal ion. The role of these residues on the conformational stability of BlGT has been studied by characterizing the autoprocessing, enzymatic activity, chemical and thermal denaturation of four new Ala single mutants. The results show that replacement of Asp568 with an Ala affects both the autoprocessing and structural stability of the protein.


    Organizational Affiliation

    Department of Applied Chemistry, National Chiayi University, 300 Syuefu Road, Chiayi City 600, Taiwan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Gamma glutamyl transpeptidase
A
398Bacillus licheniformisMutation(s): 0 
EC: 2.3.2.2
Find proteins for A9YTT0 (Bacillus licheniformis)
Go to UniProtKB:  A9YTT0
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Gamma-glutamyltranspeptidase
B
187Bacillus licheniformis (strain ATCC 14580 / DSM 13 / JCM 2505 / NBRC 12200 / NCIMB 9375 / NRRL NRS-1264 / Gibson 46)Mutation(s): 0 
Gene Names: ggt
Find proteins for Q65KZ6 (Bacillus licheniformis (strain ATCC 14580 / DSM 13 / JCM 2505 / NBRC 12200 / NCIMB 9375 / NRRL NRS-1264 / Gibson 46))
Go to UniProtKB:  Q65KZ6
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MG
Query on MG

Download SDF File 
Download CCD File 
A, B
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.98 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.191 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 60.896α = 90.00
b = 61.968β = 90.00
c = 148.245γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data scaling
REFMACrefinement
CrystalCleardata collection
PHASERphasing
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2014-02-14 
  • Released Date: 2014-07-23 
  • Deposition Author(s): Merlino, A.

Revision History 

  • Version 1.0: 2014-07-23
    Type: Initial release