3UO9

Crystal Structure of Human GAC in Complex with Glutamate and BPTES


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.195 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Full-length human glutaminase in complex with an allosteric inhibitor.

DeLaBarre, B.Gross, S.Fang, C.Gao, Y.Jha, A.Jiang, F.Song J, J.Wei, W.Hurov, J.B.

(2011) Biochemistry 50: 10764-10770

  • DOI: 10.1021/bi201613d
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Glutaminase (GLS1/2) catalyzes the conversion of L-glutamine to L-glutamate and ammonia. The level of a splice variant of GLS1 (GAC) is elevated in certain cancers, and GAC is specifically inhibited by bis-2-(5-phenylacetimido-1,2,4,thiadiazol-2-yl)e ...

    Glutaminase (GLS1/2) catalyzes the conversion of L-glutamine to L-glutamate and ammonia. The level of a splice variant of GLS1 (GAC) is elevated in certain cancers, and GAC is specifically inhibited by bis-2-(5-phenylacetimido-1,2,4,thiadiazol-2-yl)ethyl sulfide (BPTES). We report here the first full-length crystal structure of GAC in the presence and absence of BPTES molecules. Two BPTES molecules bind at an interface region of the GAC tetramer in a manner that appears to lock the GAC tetramer into a nonproductive conformation. The importance of these loops with regard to overall enzymatic activity of the tetramer was revealed by a series of GAC point mutants designed to create a BPTES resistant GAC.


    Organizational Affiliation

    Agios Pharmaceuticals, Cambridge, Massachusetts 02139-4169, United States. byron.delabarre@agios.com




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Glutaminase kidney isoform, mitochondrial
A, B, C, D
534Homo sapiensMutation(s): 0 
Gene Names: GLS (GLS1, KIAA0838)
EC: 3.5.1.2
Find proteins for O94925 (Homo sapiens)
Go to Gene View: GLS
Go to UniProtKB:  O94925
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL

Download SDF File 
Download CCD File 
A, C, D
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
04A
Query on 04A

Download SDF File 
Download CCD File 
B, C
N,N'-[sulfanediylbis(ethane-2,1-diyl-1,3,4-thiadiazole-5,2-diyl)]bis(2-phenylacetamide)
BPTES
C24 H24 N6 O2 S3
MDJIPXYRSZHCFS-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
04AIC50: 81 - 8600 nM (99) BINDINGDB
04AIC50: 80 nM BINDINGMOAD
04AIC50: 80 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.195 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 50.117α = 90.00
b = 139.434β = 93.73
c = 177.713γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data collection
HKL-2000data scaling
REFMACrefinement
MOLREPphasing
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-12-07
    Type: Initial release
  • Version 1.1: 2013-01-02
    Type: Database references