Structure of glutamate transporter homologue GltTk in the presence of TBOA inhibitor

Experimental Data Snapshot

  • Resolution: 3.47 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

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Structural ensemble of a glutamate transporter homologue in lipid nanodisc environment.

Arkhipova, V.Guskov, A.Slotboom, D.J.

(2020) Nat Commun 11: 998-998

  • DOI: https://doi.org/10.1038/s41467-020-14834-8
  • Primary Citation of Related Structures:  
    6XWN, 6XWO, 6XWP, 6XWQ, 6XWR

  • PubMed Abstract: 

    Glutamate transporters are cation-coupled secondary active membrane transporters that clear the neurotransmitter L-glutamate from the synaptic cleft. These transporters are homotrimers, with each protomer functioning independently by an elevator-type mechanism, in which a mobile transport domain alternates between inward- and outward-oriented states. Using single-particle cryo-EM we have determined five structures of the glutamate transporter homologue Glt Tk , a Na + - L-aspartate symporter, embedded in lipid nanodiscs. Dependent on the substrate concentrations used, the protomers of the trimer adopt a variety of asymmetrical conformations, consistent with the independent movement. Six of the 15 resolved protomers are in a hitherto elusive state of the transport cycle in which the inward-facing transporters are loaded with Na + ions. These structures explain how substrate-leakage is prevented - a strict requirement for coupled transport. The belt protein of the lipid nanodiscs bends around the inward oriented protomers, suggesting that membrane deformations occur during transport.

  • Organizational Affiliation

    Groningen Biomolecular Sciences and Biotechnology Institute (GBB), University of Groningen, Nijenborgh 4, 9747AG, Groningen, The Netherlands.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Proton/glutamate symporter, SDF family
A, B, C
430Thermococcus kodakarensis KOD1Mutation(s): 0 
Gene Names: TK0986
Membrane Entity: Yes 
Find proteins for Q5JID0 (Thermococcus kodakarensis (strain ATCC BAA-918 / JCM 12380 / KOD1))
Explore Q5JID0 
Go to UniProtKB:  Q5JID0
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ5JID0
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on TB1

Download Ideal Coordinates CCD File 
D [auth B],
E [auth C]
C11 H13 N O5
Experimental Data & Validation

Experimental Data

  • Resolution: 3.47 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2020-03-04
    Type: Initial release