4GVL

Crystal Structure of the GsuK RCK domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.262 
  • R-Value Work: 0.228 
  • R-Value Observed: 0.229 

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This is version 1.0 of the entry. See complete history


Literature

Distinct gating mechanisms revealed by the structures of a multi-ligand gated K(+) channel.

Kong, C.Zeng, W.Ye, S.Chen, L.Sauer, D.B.Lam, Y.Derebe, M.G.Jiang, Y.

(2012) Elife 1: e00184-e00184

  • DOI: 10.7554/eLife.00184
  • Primary Citation of Related Structures:  
    4GVL, 4GX0, 4GX1, 4GX2, 4GX5

  • PubMed Abstract: 
  • The gating ring-forming RCK domain regulates channel gating in response to various cellular chemical stimuli in eukaryotic Slo channel families and the majority of ligand-gated prokaryotic K(+) channels and transporters. Here we present structural and functional studies of a dual RCK-containing, multi-ligand gated K(+) channel from Geobacter sulfurreducens, named GsuK ...

    The gating ring-forming RCK domain regulates channel gating in response to various cellular chemical stimuli in eukaryotic Slo channel families and the majority of ligand-gated prokaryotic K(+) channels and transporters. Here we present structural and functional studies of a dual RCK-containing, multi-ligand gated K(+) channel from Geobacter sulfurreducens, named GsuK. We demonstrate that ADP and NAD(+) activate the GsuK channel, whereas Ca(2+) serves as an allosteric inhibitor. Multiple crystal structures elucidate the structural basis of multi-ligand gating in GsuK, and also reveal a unique ion conduction pore with segmented inner helices. Structural comparison leads us to propose a novel pore opening mechanics that is distinct from other K(+) channels.DOI:http://dx.doi.org/10.7554/eLife.00184.001.


    Organizational Affiliation

    Department of Physiology , University of Texas Southwestern Medical Center , Dallas , United States.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
TrkA domain proteinA, B, C, D462Geobacter sulfurreducens PCAMutation(s): 0 
Gene Names: GSU0527
Membrane Entity: Yes 
UniProt
Find proteins for Q74FS9 (Geobacter sulfurreducens (strain ATCC 51573 / DSM 12127 / PCA))
Explore Q74FS9 
Go to UniProtKB:  Q74FS9
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.262 
  • R-Value Work: 0.228 
  • R-Value Observed: 0.229 
  • Space Group: I 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 110.648α = 90
b = 161.693β = 90
c = 310.127γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
PHASERphasing
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Ligand Structure Quality Assessment  



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-12-26
    Type: Initial release