6VTL

Structure of an acid-sensing ion channel solubilized by styrene maleic acid and in a resting state at high pH

  • Classification: TRANSPORT PROTEIN
  • Organism(s): Gallus gallus
  • Expression System: Homo sapiens
  • Mutation(s): No 
  • Membrane Protein: Yes  OPMPDBTMMemProtMDmpstruc

  • Deposited: 2020-02-12 Released: 2020-03-11 
  • Deposition Author(s): Yoder, N., Gouaux, E.
  • Funding Organization(s): National Institutes of Health/National Institute of Diabetes and Digestive and Kidney Disease (NIH/NIDDK), National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)

Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.65 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

The His-Gly motif of acid-sensing ion channels resides in a reentrant 'loop' implicated in gating and ion selectivity.

Yoder, N.Gouaux, E.

(2020) Elife 9

  • DOI: 10.7554/eLife.56527
  • Primary Citation of Related Structures:  
    6VTK, 6VTL

  • PubMed Abstract: 
  • Acid-sensing ion channels (ASICs) are proton-gated members of the epithelial sodium channel/degenerin (ENaC/DEG) superfamily of ion channels and are expressed throughout the central and peripheral nervous systems. The homotrimeric splice variant ASIC1a has been implicated in nociception, fear memory, mood disorders and ischemia ...

    Acid-sensing ion channels (ASICs) are proton-gated members of the epithelial sodium channel/degenerin (ENaC/DEG) superfamily of ion channels and are expressed throughout the central and peripheral nervous systems. The homotrimeric splice variant ASIC1a has been implicated in nociception, fear memory, mood disorders and ischemia. Here, we extract full-length chicken ASIC1 (cASIC1) from cell membranes using styrene maleic acid (SMA) copolymer, elucidating structures of ASIC1 channels in both high pH resting and low pH desensitized conformations by single-particle cryo-electron microscopy (cryo-EM). The structures of resting and desensitized channels reveal a reentrant loop at the amino terminus of ASIC1 that includes the highly conserved 'His-Gly' (HG) motif. The reentrant loop lines the lower ion permeation pathway and buttresses the 'Gly-Ala-Ser' (GAS) constriction, thus providing a structural explanation for the role of the His-Gly dipeptide in the structure and function of ASICs.


    Related Citations: 
    • Conserved His-Gly motif of acid-sensing ion channels resides in a reentrant loop implicated in gating and ion selectivity
      Yoder, N., Gouaux, E.
      (2020) Biorxiv --: --

    Organizational Affiliation

    Howard Hughes Medical Institute, Oregon Health & Science University, Portland, United States.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Acid-sensing ion channel 1A, C [auth B], B [auth C]527Gallus gallusMutation(s): 0 
Gene Names: ASIC1ACCN2
Membrane Entity: Yes 
UniProt
Find proteins for Q1XA76 (Gallus gallus)
Explore Q1XA76 
Go to UniProtKB:  Q1XA76
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.65 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report




Entry History & Funding Information

Deposition Data

  • Deposited Date: 2020-02-12 
  • Released Date: 2020-03-11 
  • Deposition Author(s): Yoder, N., Gouaux, E.

Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of Diabetes and Digestive and Kidney Disease (NIH/NIDDK)United States5T32DK007680
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)United States5R01NS038631
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)United States5F31NS096782

Revision History  (Full details and data files)

  • Version 1.0: 2020-03-11
    Type: Initial release
  • Version 1.1: 2020-06-24
    Changes: Database references
  • Version 1.2: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Data collection, Derived calculations, Structure summary