6MPB

Cryo-EM structure of the human neutral amino acid transporter ASCT2


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.84 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Cryo-EM structures of the human glutamine transporter SLC1A5 (ASCT2) in the outward-facing conformation.

Yu, X.Plotnikova, O.Bonin, P.D.Subashi, T.A.McLellan, T.J.Dumlao, D.Che, Y.Dong, Y.Y.Carpenter, E.P.West, G.M.Qiu, X.Culp, J.S.Han, S.

(2019) Elife 8: --

  • DOI: 10.7554/eLife.48120
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Alanine-serine-cysteine transporter 2 (ASCT2, SLC1A5) is the primary transporter of glutamine in cancer cells and regulates the mTORC1 signaling pathway. The SLC1A5 function involves finely tuned orchestration of two domain movements that include the ...

    Alanine-serine-cysteine transporter 2 (ASCT2, SLC1A5) is the primary transporter of glutamine in cancer cells and regulates the mTORC1 signaling pathway. The SLC1A5 function involves finely tuned orchestration of two domain movements that include the substrate-binding transport domain and the scaffold domain. Here, we present cryo-EM structures of human SLC1A5 and its complex with the substrate, L-glutamine in an outward-facing conformation. These structures reveal insights into the conformation of the critical ECL2a loop which connects the two domains, thus allowing rigid body movement of the transport domain throughout the transport cycle. Furthermore, the structures provide new insights into substrate recognition, which involves conformational changes in the HP2 loop. A putative cholesterol binding site was observed near the domain interface in the outward-facing state. Comparison with the previously determined inward-facing structure of SCL1A5 provides a basis for a more integrated understanding of substrate recognition and transport mechanism in the SLC1 family.


    Organizational Affiliation

    Medicine Design, Pfizer Inc, Groton, United States.,Structural Genomics Consortium, University of Oxford, Oxford, United Kingdom.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Neutral amino acid transporter B(0)
B, C, A
541Homo sapiensMutation(s): 0 
Gene Names: SLC1A5 (ASCT2, M7V1, RDR, RDRC)
Find proteins for Q15758 (Homo sapiens)
Go to Gene View: SLC1A5
Go to UniProtKB:  Q15758
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GLN
Query on GLN

Download SDF File 
Download CCD File 
A, B, C
GLUTAMINE
C5 H10 N2 O3
ZDXPYRJPNDTMRX-VKHMYHEASA-N
 Ligand Interaction
NAG
Query on NAG

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

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.84 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
Software Package:
Software NamePurpose
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2018-10-05 
  • Released Date: 2019-11-06 
  • Deposition Author(s): Yu, X., Han, S.

Revision History 

  • Version 1.0: 2019-11-06
    Type: Initial release
  • Version 1.1: 2019-11-27
    Type: Data collection