Structure of the thermostabilized EAAT1 cryst mutant in complex with the competititve inhibitor TFB-TBOA and the allosteric inhibitor UCPH101

Experimental Data Snapshot

  • Resolution: 3.71 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.227 
  • R-Value Observed: 0.230 

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Structure and allosteric inhibition of excitatory amino acid transporter 1.

Canul-Tec, J.C.Assal, R.Cirri, E.Legrand, P.Brier, S.Chamot-Rooke, J.Reyes, N.

(2017) Nature 544: 446-451

  • DOI: https://doi.org/10.1038/nature22064
  • Primary Citation of Related Structures:  
    5LLM, 5LLU, 5LM4, 5MJU

  • PubMed Abstract: 

    Human members of the solute carrier 1 (SLC1) family of transporters take up excitatory neurotransmitters in the brain and amino acids in peripheral organs. Dysregulation of the function of SLC1 transporters is associated with neurodegenerative disorders and cancer. Here we present crystal structures of a thermostabilized human SLC1 transporter, the excitatory amino acid transporter 1 (EAAT1), with and without allosteric and competitive inhibitors bound. The structures reveal architectural features of the human transporters, such as intra- and extracellular domains that have potential roles in transport function, regulation by lipids and post-translational modifications. The coordination of the allosteric inhibitor in the structures and the change in the transporter dynamics measured by hydrogen-deuterium exchange mass spectrometry reveal a mechanism of inhibition, in which the transporter is locked in the outward-facing states of the transport cycle. Our results provide insights into the molecular mechanisms underlying the function and pharmacology of human SLC1 transporters.

  • Organizational Affiliation

    Molecular Mechanisms of Membrane Transport Laboratory, Institut Pasteur, 25-28 rue du Docteur Roux, 75015 Paris, France.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Excitatory amino acid transporter 1,Neutral amino acid transporter B(0),Excitatory amino acid transporter 1522Homo sapiensMutation(s): 72 
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for Q15758 (Homo sapiens)
Explore Q15758 
Go to UniProtKB:  Q15758
PHAROS:  Q15758
GTEx:  ENSG00000105281 
Find proteins for P43003 (Homo sapiens)
Explore P43003 
Go to UniProtKB:  P43003
PHAROS:  P43003
GTEx:  ENSG00000079215 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupsP43003Q15758
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on 7O9

Download Ideal Coordinates CCD File 
C [auth A](2~{S},3~{S})-2-azanyl-3-[[3-[[4-(trifluoromethyl)phenyl]carbonylamino]phenyl]methoxy]butanedioic acid
C19 H17 F3 N2 O6
Query on 6Z6

Download Ideal Coordinates CCD File 
B [auth A]2-Amino-5,6,7,8-tetrahydro-4-(4-methoxyphenyl)-7-(naphthalen-1-yl)-5-oxo-4H-chromene-3-carbonitrile
C27 H22 N2 O3
Experimental Data & Validation

Experimental Data

  • Resolution: 3.71 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.227 
  • R-Value Observed: 0.230 
  • Space Group: P 63
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 124.33α = 90
b = 124.33β = 90
c = 90.81γ = 120
Software Package:
Software NamePurpose
XDSdata reduction
XSCALEdata scaling

Structure Validation

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Ligand Structure Quality Assessment 

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
ERC Starting GrantFrance309657

Revision History  (Full details and data files)

  • Version 1.0: 2017-04-19
    Type: Initial release
  • Version 1.1: 2017-05-03
    Changes: Database references
  • Version 1.2: 2017-05-10
    Changes: Database references
  • Version 1.3: 2024-01-17
    Changes: Data collection, Database references, Refinement description