6FNW

Structure of a volume-regulated anion channel of the LRRC8 family


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.208 
  • R-Value Work: 0.179 
  • R-Value Observed: 0.180 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structure of a volume-regulated anion channel of the LRRC8 family.

Deneka, D.Sawicka, M.Lam, A.K.M.Paulino, C.Dutzler, R.

(2018) Nature 558: 254-259

  • DOI: 10.1038/s41586-018-0134-y
  • Primary Citation of Related Structures:  
    6G9L, 6G9O, 6FNW, 6G8Z

  • PubMed Abstract: 
  • Volume-regulated anion channels are activated in response to hypotonic stress. These channels are composed of closely related paralogues of the leucine-rich repeat-containing protein 8 (LRRC8) family that co-assemble to form hexameric complexes. Here, us ...

    Volume-regulated anion channels are activated in response to hypotonic stress. These channels are composed of closely related paralogues of the leucine-rich repeat-containing protein 8 (LRRC8) family that co-assemble to form hexameric complexes. Here, using cryo-electron microscopy and X-ray crystallography, we determine the structure of a homomeric channel of the obligatory subunit LRRC8A. This protein conducts ions and has properties in common with endogenous heteromeric channels. Its modular structure consists of a transmembrane pore domain followed by a cytoplasmic leucine-rich repeat domain. The transmembrane domain, which is structurally related to connexin proteins, is wide towards the cytoplasm but constricted on the outside by a structural unit that acts as a selectivity filter. An excess of basic residues in the filter and throughout the pore attracts anions by electrostatic interaction. Our work reveals the previously unknown architecture of volume-regulated anion channels and their mechanism of selective anion conduction.


    Organizational Affiliation

    Department of Biochemistry, University of Zurich, Zurich, Switzerland. dutzler@bioc.uzh.ch.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Volume-regulated anion channel subunit LRRC8A A417Mus musculusMutation(s): 0 
Gene Names: Lrrc8aLrrc8
Membrane protein
Mpstruc
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Channels: Other Ion Channels
Protein: 
LRRC8A volume-regulated anion channel
Find proteins for Q80WG5 (Mus musculus)
Explore Q80WG5 
Go to UniProtKB:  Q80WG5
NIH Common Fund Data Resources
IMPC:  MGI:2652847
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.208 
  • R-Value Work: 0.179 
  • R-Value Observed: 0.180 
  • Space Group: P 65
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 140.13α = 90
b = 140.13β = 90
c = 42.27γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XDSdata scaling
PHENIXphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Switzerland--

Revision History 

  • Version 1.0: 2018-05-16
    Type: Initial release
  • Version 1.1: 2018-05-23
    Changes: Data collection, Structure summary
  • Version 1.2: 2018-05-30
    Changes: Data collection, Database references
  • Version 1.3: 2018-06-27
    Changes: Data collection, Database references