1BYW

STRUCTURE OF THE N-TERMINAL DOMAIN OF THE HUMAN-ERG POTASSIUM CHANNEL


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.286 
  • R-Value Work: 0.252 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Crystal Structure and Functional Analysis of the Herg Potassium Channel N-Terminus: A Eukaryotic Pas Domain

Cabral, J.H.M.Lee, A.Cohen, S.L.Chait, B.T.Li, M.Mackinnon, R.

(1998) Cell 95: 649-655


  • PubMed Abstract: 
  • The HERG voltage-dependent K+ channel plays a role in cardiac electrical excitability, and when defective, it underlies one form of the long QT syndrome. We have determined the crystal structure of the HERG K+ channel N-terminal domain and studied it ...

    The HERG voltage-dependent K+ channel plays a role in cardiac electrical excitability, and when defective, it underlies one form of the long QT syndrome. We have determined the crystal structure of the HERG K+ channel N-terminal domain and studied its role as a modifier of gating using electrophysiological methods. The domain is similar in structure to a bacterial light sensor photoactive yellow protein and provides the first three-dimensional model of a eukaryotic PAS domain. Scanning mutagenesis of the domain surface has allowed the identification of a hydrophobic "hot spot" forming a putative interface with the body of the K+ channel to which it tightly binds. The presence of the domain attached to the channel slows the rate of deactivation. Given the roles of PAS domains in biology, we propose that the HERG N-terminal domain has a regulatory function.


    Organizational Affiliation

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




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PROTEIN (HUMAN ERG POTASSIUM CHANNEL)
A
110Homo sapiensMutation(s): 1 
Gene Names: KCNH2 (ERG, ERG1, HERG)
Find proteins for Q12809 (Homo sapiens)
Go to Gene View: KCNH2
Go to UniProtKB:  Q12809
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.286 
  • R-Value Work: 0.252 
  • Space Group: P 65 2 2
Unit Cell:
Length (Å)Angle (°)
a = 56.100α = 90.00
b = 56.100β = 90.00
c = 135.500γ = 120.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
CCP4phasing
DENZOdata reduction
X-PLORrefinement
CCP4model building

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1998-12-16
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2018-03-14
    Type: Database references