3VMX

Crystal Structure of a parallel coiled-coil dimerization domain from the voltage-gated proton channel


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.45 Å
  • R-Value Free: 0.214 
  • R-Value Work: 0.179 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

The cytoplasmic coiled-coil mediates cooperative gating temperature sensitivity in the voltage-gated H(+) channel Hv1

Fujiwara, Y.Kurokawa, T.Takeshita, K.Kobayashi, M.Okochi, Y.Nakagawa, A.Okamura, Y.

(2012) Nat Commun 3: 816-816

  • DOI: 10.1038/ncomms1823

  • PubMed Abstract: 
  • Hv1/VSOP is a dimeric voltage-gated H(+) channel in which the gating of one subunit is reportedly coupled to that of the other subunit within the dimer. The molecular basis for dimer formation and intersubunit coupling, however, remains unknown. Here ...

    Hv1/VSOP is a dimeric voltage-gated H(+) channel in which the gating of one subunit is reportedly coupled to that of the other subunit within the dimer. The molecular basis for dimer formation and intersubunit coupling, however, remains unknown. Here we show that the carboxy terminus ends downstream of the S4 voltage-sensor helix twist in a dimer coiled-coil architecture, which mediates cooperative gating. We also show that the temperature-dependent activation of H(+) current through Hv1/VSOP is regulated by thermostability of the coiled-coil domain, and that this regulation is altered by mutation of the linker between S4 and the coiled-coil. Cooperative gating within the dimer is also dependent on the linker structure, which circular dichroism spectrum analysis suggests is α-helical. Our results indicate that the cytoplasmic coiled-coil strands form continuous α-helices with S4 and mediate cooperative gating to adjust the range of temperatures over which Hv1/VSOP operates.


    Organizational Affiliation

    Laboratory of Integrative Physiology, Department of Physiology, Graduate School and Faculty of Medicine, Osaka University, Yamadaoka 2-2, Suita, Osaka 565-0871, 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, C, B, D
48Mus 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: 1.45 Å
  • R-Value Free: 0.214 
  • R-Value Work: 0.179 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 40.156α = 90.00
b = 54.010β = 90.00
c = 81.439γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
SCALEPACKdata scaling
REFMACrefinement
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-05-30
    Type: Initial release
  • Version 1.1: 2013-06-26
    Type: Database references