3FB8

KcsA Potassium channel in the open-conductive state with 20 A opening at T112 in the presence of Rb+ ion


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.4 Å
  • R-Value Free: 0.304
  • R-Value Work: 0.284

Literature

Macromolecules
Sequence Display for 3FB8

Classification: membrane protein / metal transport

Total Structure Weight: 58116.42

Macromolecule Entities
Molecule Chains Length Organism Details
antibody fab fragment heavy chain A 219 Mus musculus
antibody fab fragment light chain B 212 Mus musculus
Voltage-gated potassium channel C 104 Streptomyces lividans Fragment: UNP residues 21-124
Mutation: H25Q, L90C, R117Q, E120Q, R121Q, R122Q, H124Q
Gene Name(s): kcsA skc1
Metabolic Pathways
Maps:       
Reactions:
ESCHER  BiGG

Membrane Protein

Source: inferred by homology | Group: ALPHA-HELICAL

Subgroup Name: Channels: Potassium, Sodium, & Proton Ion-Selective

Protein Name: KcsA Potassium channel, H+ gated


Small Molecules
Ligands 1 Unique
ID Chains Name / Formula / InChI Key 2D Diagram 3D Interactions
RB
Query on RB

C RUBIDIUM ION
Rb
NCCSSGKUIKYAJD-UHFFFAOYSA-N
Ligand Explorer NGL
 
Binding Pocket (JSmol)
 
Electron Density (JSmol)

Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.4 Å
  • R-Value Free: 0.304
  • R-Value Work: 0.284
  • Space Group: I 4

Unit Cell:

Length (Å) Angle (°)
a = 155.64 α = 90.00
b = 155.64 β = 90.00
c = 73.03 γ = 90.00

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History

Deposition Data

  • Deposited Date: 2008-11-18
  • Released Date: 2010-05-19
  • Deposition author(s): Cuello, L.G., Jogini, V., Cortes, D.M., Perozo, E.

Revision History

  • Version 1_0: 2010-05-19

    Type: Initial release

  • Version 1_1: 2011-07-13

    Type: Version format compliance