6BAU

Crystal Structure of GltPh R397C in complex with L-Cysteine


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.80 Å
  • R-Value Free: 0.290 
  • R-Value Work: 0.267 
  • R-Value Observed: 0.268 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structural characterisation reveals insights into substrate recognition by the glutamine transporter ASCT2/SLC1A5.

Scopelliti, A.J.Font, J.Vandenberg, R.J.Boudker, O.Ryan, R.M.

(2018) Nat Commun 9: 38-38

  • DOI: 10.1038/s41467-017-02444-w
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Cancer cells undergo a shift in metabolism where they become reliant on nutrients such as the amino-acid glutamine. Glutamine enters the cell via the alanine/serine/cysteine transporter 2 (ASCT2) that is upregulated in several cancers to maintain an ...

    Cancer cells undergo a shift in metabolism where they become reliant on nutrients such as the amino-acid glutamine. Glutamine enters the cell via the alanine/serine/cysteine transporter 2 (ASCT2) that is upregulated in several cancers to maintain an increased supply of this nutrient and are therefore an attractive target in cancer therapeutic development. ASCT2 belongs to the glutamate transporter (SLC1A) family but is the only transporter in this family able to transport glutamine. The structural basis for glutamine selectivity of ASCT2 is unknown. Here, we identify two amino-acid residues in the substrate-binding site that are responsible for conferring glutamine selectivity. We introduce corresponding mutations into a prokaryotic homologue of ASCT2 and solve four crystal structures, which reveal the structural basis for neutral amino acid and inhibitor binding in this family. This structural model of ASCT2 may provide a basis for future development of selective ASCT2 inhibitors to treat glutamine-dependent cancers.


    Organizational Affiliation

    Transporter Biology Group, Discipline of Pharmacology, Sydney Medical School, University of Sydney, Sydney, NSW, 2006, Australia. renae.ryan@sydney.edu.au.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Glutamate transporter homolog
A, B, C
420Pyrococcus horikoshii OT3Mutation(s): 1 
Gene Names: PH1295
Find proteins for O59010 (Pyrococcus horikoshii (strain ATCC 700860 / DSM 12428 / JCM 9974 / NBRC 100139 / OT-3))
Go to UniProtKB:  O59010
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CYS
Query on CYS

Download CCD File 
A, B, C
CYSTEINE
C3 H7 N O2 S
XUJNEKJLAYXESH-REOHCLBHSA-N
 Ligand Interaction
NA
Query on NA

Download CCD File 
A, B, C
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.80 Å
  • R-Value Free: 0.290 
  • R-Value Work: 0.267 
  • R-Value Observed: 0.268 
  • Space Group: P 61
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 115.313α = 90
b = 115.313β = 90
c = 322.274γ = 120
Software Package:
Software NamePurpose
SCALAdata scaling
REFMACrefinement
PDB_EXTRACTdata extraction
XDSdata reduction
PHASERphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Health and Medical Research Council (NHMRC, Australia)AustraliaAPP1048784
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)United StatesR01NS064357

Revision History 

  • Version 1.0: 2018-01-17
    Type: Initial release
  • Version 1.1: 2019-12-18
    Changes: Author supporting evidence