4GDX

Crystal Structure of Human Gamma-Glutamyl Transpeptidase--Glutamate complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.67 Å
  • R-Value Free: 0.174 
  • R-Value Work: 0.145 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Novel Insights into Eukaryotic gamma-Glutamyltranspeptidase 1 from the Crystal Structure of the Glutamate-bound Human Enzyme.

West, M.B.Chen, Y.Wickham, S.Heroux, A.Cahill, K.Hanigan, M.H.Mooers, B.H.

(2013) J.Biol.Chem. 288: 31902-31913

  • DOI: 10.1074/jbc.M113.498139
  • Primary Citation of Related Structures:  
  • Also Cited By: 4ZCG, 4ZC6, 4ZBK, 4Z9O

  • PubMed Abstract: 
  • The enzyme γ-glutamyltranspeptidase 1 (GGT1) is a conserved member of the N-terminal nucleophile hydrolase family that cleaves the γ-glutamyl bond of glutathione and other γ-glutamyl compounds. In animals, GGT1 is expressed on the surface of the cell ...

    The enzyme γ-glutamyltranspeptidase 1 (GGT1) is a conserved member of the N-terminal nucleophile hydrolase family that cleaves the γ-glutamyl bond of glutathione and other γ-glutamyl compounds. In animals, GGT1 is expressed on the surface of the cell and has critical roles in maintaining cysteine levels in the body and regulating intracellular redox status. Expression of GGT1 has been implicated as a potentiator of asthma, cardiovascular disease, and cancer. The rational design of effective inhibitors of human GGT1 (hGGT1) has been delayed by the lack of a reliable structural model. The available crystal structures of several bacterial GGTs have been of limited use due to differences in the catalytic behavior of bacterial and mammalian GGTs. We report the high resolution (1.67 Å) crystal structure of glutamate-bound hGGT1, the first of any eukaryotic GGT. Comparisons of the active site architecture of hGGT1 with those of its bacterial orthologs highlight key differences in the residues responsible for substrate binding, including a bimodal switch in the orientation of the catalytic nucleophile (Thr-381) that is unique to the human enzyme. Compared with several bacterial counterparts, the lid loop in the crystal structure of hGGT1 adopts an open conformation that allows greater access to the active site. The hGGT1 structure also revealed tightly bound chlorides near the catalytic residue that may contribute to catalytic activity. These are absent in the bacterial GGTs. These differences between bacterial and mammalian GGTs and the new structural data will accelerate the development of new therapies for GGT1-dependent diseases.


    Organizational Affiliation

    From the Departments of Cell Biology and.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Gamma-glutamyltranspeptidase 1 heavy chain
A
374Homo sapiensMutation(s): 0 
Gene Names: GGT1 (GGT)
EC: 3.4.19.13
Find proteins for P19440 (Homo sapiens)
Go to Gene View: GGT1
Go to UniProtKB:  P19440
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Gamma-glutamyltranspeptidase 1 light chain
B
195Homo sapiensMutation(s): 0 
Gene Names: GGT1 (GGT)
EC: 3.4.19.13
Find proteins for P19440 (Homo sapiens)
Go to Gene View: GGT1
Go to UniProtKB:  P19440
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NA
Query on NA

Download SDF File 
Download CCD File 
A
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
CL
Query on CL

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Download CCD File 
A, B
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
GLU
Query on GLU

Download SDF File 
Download CCD File 
B
GLUTAMIC ACID
C5 H9 N O4
WHUUTDBJXJRKMK-VKHMYHEASA-N
 Ligand Interaction
NAG
Query on NAG

Download SDF File 
Download CCD File 
A, B
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.67 Å
  • R-Value Free: 0.174 
  • R-Value Work: 0.145 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 105.524α = 90.00
b = 125.247β = 90.00
c = 104.468γ = 90.00
Software Package:
Software NamePurpose
SCALAdata scaling
MOLREPphasing
HKL-2000data collection
PHENIXrefinement
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-09-25
    Type: Initial release
  • Version 1.1: 2013-10-16
    Type: Database references
  • Version 1.2: 2013-11-27
    Type: Database references