4GX0

Crystal structure of the GsuK L97D mutant


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.203 
  • R-Value Observed: 0.205 

wwPDB Validation   3D Report Full Report


This is version 2.0 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, 4GX5, 4GX0, 4GX1, 4GX2

  • 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)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
TrkA domain proteinA, B, C, D565Geobacter sulfurreducens PCAMutation(s): 3 
Gene Names: GSU0527
Membrane protein
Mpstruc
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Channels: Potassium, Sodium, & Proton Ion-Selective
Protein: 
GsuK multi-ligand gated K+ channel, L97D mutant
Find proteins for Q74FS9 (Geobacter sulfurreducens (strain ATCC 51573 / DSM 12127 / PCA))
Explore Q74FS9 
Go to UniProtKB:  Q74FS9
Protein Feature View
Expand
  • Reference Sequence
Oligosaccharides

Help

Entity ID: 2
MoleculeChainsChain Length2D Diagram Glycosylation3D Interactions
alpha-D-glucopyranose-(1-4)-alpha-D-glucopyranoseE2 N/A Oligosaccharides Interaction
Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GLC
Query on GLC

Download Ideal Coordinates CCD File 
GA [auth D], S [auth B], T [auth B]alpha-D-glucopyranose
C6 H12 O6
WQZGKKKJIJFFOK-DVKNGEFBSA-N
 Ligand Interaction
PO4
Query on PO4

Download Ideal Coordinates CCD File 
CA [auth C], FA [auth D], M [auth A], Q [auth B], R [auth B]PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
ZN
Query on ZN

Download Ideal Coordinates CCD File 
EA [auth D], K [auth A], N [auth B], Y [auth C]ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
CA
Query on CA

Download Ideal Coordinates CCD File 
AA [auth C], L [auth A], O [auth B], Z [auth C]CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
K
Query on K

Download Ideal Coordinates CCD File 
BA [auth C] , DA [auth D] , F [auth A] , G [auth A] , H [auth A] , I [auth A] , J [auth A] , P [auth B] , 
BA [auth C],  DA [auth D],  F [auth A],  G [auth A],  H [auth A],  I [auth A],  J [auth A],  P [auth B],  U [auth C],  V [auth C],  W [auth C],  X [auth C]
POTASSIUM ION
K
NPYPAHLBTDXSSS-UHFFFAOYSA-N
 Ligand Interaction
Biologically Interesting Molecules (External Reference) 1 Unique
Entity ID: 2
IDChainsNameType/Class2D Diagram3D Interactions
PRD_900001
Query on PRD_900001
Ealpha-maltoseOligosaccharide /  Nutrient

--

Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.203 
  • R-Value Observed: 0.205 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 232.934α = 90
b = 111.67β = 134.47
c = 164.133γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
PHASERphasing
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-12-26
    Type: Initial release
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Database references, Derived calculations, Non-polymer description, Structure summary