1ID1

CRYSTAL STRUCTURE OF THE RCK DOMAIN FROM E.COLI POTASSIUM CHANNEL


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.208 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structure of the RCK domain from the E. coli K+ channel and demonstration of its presence in the human BK channel.

Jiang, Y.Pico, A.Cadene, M.Chait, B.T.MacKinnon, R.

(2001) Neuron 29: 593-601

  • DOI: 10.1016/s0896-6273(01)00236-7
  • Primary Citation of Related Structures:  
    1ID1

  • PubMed Abstract: 
  • The intracellular C-terminal domain structure of a six-transmembrane K+ channel from Escherichia coli has been solved by X-ray crystallography at 2.4 A resolution. The structure is representative of a broad class of domains/proteins that regulate the conductance of K+ (here referred to as RCK domains) in prokaryotic K+ transporters and K+ channels ...

    The intracellular C-terminal domain structure of a six-transmembrane K+ channel from Escherichia coli has been solved by X-ray crystallography at 2.4 A resolution. The structure is representative of a broad class of domains/proteins that regulate the conductance of K+ (here referred to as RCK domains) in prokaryotic K+ transporters and K+ channels. The RCK domain has a Rossmann-fold topology with unique positions, not commonly conserved among Rossmann-fold proteins, composing a well-conserved salt bridge and a hydrophobic dimer interface. Structure-based amino acid sequence alignments and mutational analysis are used to demonstrate that an RCK domain is also present and is an important component of the gating machinery in eukaryotic large-conductance Ca2+ activated K+ channels.


    Organizational Affiliation

    Laboratory of Molecular Neurobiology and Biophysics, Rockefeller University, New York, NY 10021, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
PUTATIVE POTASSIUM CHANNEL PROTEINA, B153Escherichia coliMutation(s): 0 
Find proteins for P31069 (Escherichia coli (strain K12))
Explore P31069 
Go to UniProtKB:  P31069
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.208 
  • Space Group: P 41
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 65.51α = 90
b = 65.51β = 90
c = 110.24γ = 90
Software Package:
Software NamePurpose
AMoREphasing
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2001-04-11
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance