7VR8

Inward-facing structure of human EAAT2 in the substrate-free state


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.58 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structural insights into inhibitory mechanism of human excitatory amino acid transporter EAAT2.

Kato, T.Kusakizako, T.Jin, C.Zhou, X.Ohgaki, R.Quan, L.Xu, M.Okuda, S.Kobayashi, K.Yamashita, K.Nishizawa, T.Kanai, Y.Nureki, O.

(2022) Nat Commun 13: 4714-4714

  • DOI: https://doi.org/10.1038/s41467-022-32442-6
  • Primary Citation of Related Structures:  
    7VR7, 7VR8

  • PubMed Abstract: 

    Glutamate is a pivotal excitatory neurotransmitter in mammalian brains, but excessive glutamate causes numerous neural disorders. Almost all extracellular glutamate is retrieved by the glial transporter, Excitatory Amino Acid Transporter 2 (EAAT2), belonging to the SLC1A family. However, in some cancers, EAAT2 expression is enhanced and causes resistance to therapies by metabolic disturbance. Despite its crucial roles, the detailed structural information about EAAT2 has not been available. Here, we report cryo-EM structures of human EAAT2 in substrate-free and selective inhibitor WAY213613-bound states at 3.2 Å and 2.8 Å, respectively. EAAT2 forms a trimer, with each protomer consisting of transport and scaffold domains. Along with a glutamate-binding site, the transport domain possesses a cavity that could be disrupted during the transport cycle. WAY213613 occupies both the glutamate-binding site and cavity of EAAT2 to interfere with its alternating access, where the sensitivity is defined by the inner environment of the cavity. We provide the characterization of the molecular features of EAAT2 and its selective inhibition mechanism that may facilitate structure-based drug design for EAAT2.


  • Organizational Affiliation

    Department of Biological Science, Graduate School of Science, The University of Tokyo, Tokyo, Japan.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Excitatory amino acid transporter 2581Homo sapiensMutation(s): 0 
Gene Names: SLC1A2EAAT2GLT1
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for P43004 (Homo sapiens)
Explore P43004 
Go to UniProtKB:  P43004
PHAROS:  P43004
GTEx:  ENSG00000110436 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP43004
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.58 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
RECONSTRUCTIONRELION3.1
MODEL REFINEMENTREFMAC5.8.0291

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Japan Society for the Promotion of Science (JSPS)Japan--

Revision History  (Full details and data files)

  • Version 1.0: 2022-08-10
    Type: Initial release
  • Version 1.1: 2022-09-28
    Changes: Database references
  • Version 1.2: 2024-06-26
    Changes: Data collection, Refinement description