5LLU image
Entry Detail
PDB ID:
5LLU
Title:
Structure of the thermostabilized EAAT1 cryst-II mutant in complex with L-ASP
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2016-07-28
Release Date:
2017-04-19
Method Details:
Experimental Method:
Resolution:
3.32 Å
R-Value Free:
0.25
R-Value Work:
0.20
R-Value Observed:
0.20
Space Group:
P 63
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Excitatory amino acid transporter 1,Neutral amino acid transporter B(0),Excitatory amino acid transporter 1
Chain IDs:A
Chain Length:522
Number of Molecules:1
Biological Source:Homo sapiens
Primary Citation
Structure and allosteric inhibition of excitatory amino acid transporter 1.
Nature 544 446 451 (2017)
PMID: 28424515 DOI: 10.1038/nature22064

Abstact

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.

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