6XWQ

Structure of glutamate transporter homologue GltTk in the saturated conditions


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.41 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.0 of the entry. See complete history


Literature

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: 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 ...

    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

    Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747AG, Groningen, The Netherlands. d.j.slotboom@rug.nl.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Proton/glutamate symporter, SDF familyA, B, C430Thermococcus kodakarensis KOD1Mutation(s): 0 
Gene Names: TK0986
Membrane Entity: Yes 
UniProt
Find proteins for Q5JID0 (Thermococcus kodakarensis (strain ATCC BAA-918 / JCM 12380 / KOD1))
Explore Q5JID0 
Go to UniProtKB:  Q5JID0
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ASP
Query on ASP

Download Ideal Coordinates CCD File 
D [auth A], E [auth B], F [auth C]ASPARTIC ACID
C4 H7 N O4
CKLJMWTZIZZHCS-REOHCLBHSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.41 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