3VYI

Crystal Structure of a trimeric coiled-coil (I/I-type) assembly domain from the voltage-gated proton channel mutant


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.305 Å
  • R-Value Free: 0.295 
  • R-Value Work: 0.232 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Gating of the designed trimeric/tetrameric voltage-gated H+ channel.

Fujiwara, Y.Kurokawa, T.Takeshita, K.Nakagawa, A.Larsson, H.P.Okamura, Y.

(2013) J.Physiol.(Paris) 591: 627-640

  • DOI: 10.1113/jphysiol.2012.243006

  • PubMed Abstract: 
  • The voltage-gated H(+) channel functions as a dimer, a configuration that is different from standard tetrameric voltage-gated channels. Each channel protomer has its own permeation pathway. The C-terminal coiled-coil domain has been shown to be neces ...

    The voltage-gated H(+) channel functions as a dimer, a configuration that is different from standard tetrameric voltage-gated channels. Each channel protomer has its own permeation pathway. The C-terminal coiled-coil domain has been shown to be necessary for both dimerization and cooperative gating in the two channel protomers. Here we report the gating cooperativity in trimeric and tetrameric Hv channels engineered by altering the hydrophobic core sequence of the coiled-coil assembly domain. Trimeric and tetrameric channels exhibited more rapid and less sigmoidal kinetics of activation of H(+) permeation than dimeric channels, suggesting that some channel protomers in trimers and tetramers failed to produce gating cooperativity observed in wild-type dimers. Multimerization of trimer and tetramer channels were confirmed by the biochemical analysis of proteins, including crystallography. These findings indicate that the voltage-gated H(+) channel is optimally designed as a dimeric channel on a solid foundation of the sequence pattern of the coiled-coil core, with efficient cooperative gating that ensures sustained and steep voltage-dependent H(+) conductance in blood cells.


    Organizational Affiliation

    Laboratory of Integrative Physiology, Department of Physiology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan. fujiwara@phys2.med.osaka-u.ac.jp




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Voltage-gated hydrogen channel 1
A, B, D, C, E, F, H, G, I, J, K, L
51Mus musculusGene Names: Hvcn1 (Bts, Vsop)
Find proteins for Q3U2S8 (Mus musculus)
Go to UniProtKB:  Q3U2S8
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.305 Å
  • R-Value Free: 0.295 
  • R-Value Work: 0.232 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 83.273α = 90.00
b = 84.010β = 90.00
c = 88.393γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data collection
SCALEPACKdata scaling
MOLREPphasing
PHENIXrefinement
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-02-27
    Type: Initial release