3UNW

Crystal Structure of Human GAC in Complex with Glutamate


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.56 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.226 
  • R-Value Observed: 0.228 

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:  
    3UNW, 3UO9

  • 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)ethyl ...

    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:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Glutaminase kidney isoform, mitochondrial ABCD534Homo sapiensMutation(s): 0 
Gene Names: GLSGLS1KIAA0838
EC: 3.5.1.2
Find proteins for O94925 (Homo sapiens)
Explore O94925 
Go to UniProtKB:  O94925
NIH Common Fund Data Resources
PHAROS:  O94925
Protein Feature View
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  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.56 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.226 
  • R-Value Observed: 0.228 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 50.66α = 90
b = 139.614β = 94.14
c = 178.385γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
MOLREPphasing
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

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