Solution NMR structure of truncated, human Hv1/VSOP (Voltage-gated proton channel)

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 10 
  • Selection Criteria: structures with the lowest energy 

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This is version 1.4 of the entry. See complete history


Nuclear Magnetic Resonance Solution Structure and Functional Behavior of the Human Proton Channel.

Bayrhuber, M.Maslennikov, I.Kwiatkowski, W.Sobol, A.Wierschem, C.Eichmann, C.Frey, L.Riek, R.

(2019) Biochemistry 58: 4017-4027

  • DOI: https://doi.org/10.1021/acs.biochem.9b00471
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The human voltage-gated proton channel [Hv1 (1) or VSDO (2) ] plays an important role in the human innate immune system. Its structure differs considerably from those of other cation channels. It is built solely of a voltage-sensing domain and thus lacks the central pore domain, which is essential for other cation channels. Here, we determined the solution structure of an N- and C-terminally truncated human Hv1 (Δ-Hv1) in the resting state by nuclear magnetic resonance (NMR) spectroscopy. Δ-Hv1 comprises the typical voltage-sensing antiparallel four-helix bundle (S1-S4) preceded by an amphipathic helix (S0). The solution structure corresponds to an intermediate state between resting and activated forms of voltage-sensing domains. Furthermore, Zn 2+ -induced closing of proton channel Δ-Hv1 was studied with two-dimensional NMR spectroscopy, which showed that characteristic large scale dynamics of open Δ-Hv1 are absent in the closed state of the channel. Additionally, pH titration studies demonstrated that a higher H + concentration is required for the protonation of side chains in the Zn 2+ -induced closed state than in the open state. These observations demonstrate both structural and dynamical changes involved in the process of voltage gating of the Hv1 channel and, in the future, may help to explain the unique properties of unidirectional conductance and the exceptional ion selectivity of the channel.

  • Organizational Affiliation

    Laboratory of Physical Chemistry , ETH Zürich , Wolfgang-Pauli-Strasse 10 , 8093 Zürich , Switzerland.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Voltage-gated hydrogen channel 1147Homo sapiensMutation(s): 0 
Gene Names: HVCN1VSOPUNQ578/PRO1140
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for Q96D96 (Homo sapiens)
Explore Q96D96 
Go to UniProtKB:  Q96D96
GTEx:  ENSG00000122986 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ96D96
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 10 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2019-04-03
    Type: Initial release
  • Version 1.1: 2019-11-06
    Changes: Data collection, Database references
  • Version 1.2: 2019-11-13
    Changes: Data collection, Database references
  • Version 1.3: 2023-06-14
    Changes: Database references, Other
  • Version 1.4: 2024-06-19
    Changes: Data collection, Database references