Evidence map›Paper›PMID 27653481›Full record

ArticleBiophysical journal2016

Voltage Dependence of Conformational Dynamics and Subconducting States of VDAC-1.

Rodolfo Briones, Conrad Weichbrodt, Licia Paltrinieri, Ingo Mey, Saskia Villinger, Karin Giller, Adam Lange, Markus Zweckstetter, Christian Griesinger, Stefan Becker and 2 more

Open access · hybridAbstract read
In one paragraph

Article in Biophysical journal, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed
1.9field-weighted citation impact, top 14% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

22 citing papers in PubMed, 34 citations in OpenAlex.

  1. Article
  2. Article
  3. Article
  4. Review
  5. Article
  6. Review
  7. Review
  8. Article
  9. Article
  10. Article
  11. Review
  12. Review
  13. Article
  14. Review
  15. Article
  16. Article
  17. Article
  18. Article
  19. Review
  20. Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

12 authors at 3 institutions in 2 countries.

Rodolfo BrionesComputational Biomolecular Dynamics Group, Max-Planck Institute for Biophysical Chemistry, Goettingen, Germany. Electronic address: rbrione@gwdg.de.
Conrad WeichbrodtInstitute of Organic and Biomolecular Chemistry, University of Goettingen, Goettingen, Germany.
Licia PaltrinieriDepartment of Chemical and Geological Sciences, University of Modena and Reggio Emilia, Modena, Italy.
Ingo MeyInstitute of Organic and Biomolecular Chemistry, University of Goettingen, Goettingen, Germany.
Saskia VillingerNMR-based Structural Biology, Max-Planck Institute for Biophysical Chemistry, Goettingen, Germany.
Karin GillerNMR-based Structural Biology, Max-Planck Institute for Biophysical Chemistry, Goettingen, Germany.
Adam LangeNMR-based Structural Biology, Max-Planck Institute for Biophysical Chemistry, Goettingen, Germany.
Markus ZweckstetterNMR-based Structural Biology, Max-Planck Institute for Biophysical Chemistry, Goettingen, Germany; German Center for Neurodegenerative Diseases (DZNE), Goettingen, Germany; Department of Neurology, University Medical Center, University of Goettingen, Goettingen, Germany.
Christian GriesingerNMR-based Structural Biology, Max-Planck Institute for Biophysical Chemistry, Goettingen, Germany.
Stefan BeckerNMR-based Structural Biology, Max-Planck Institute for Biophysical Chemistry, Goettingen, Germany.
Claudia SteinemInstitute of Organic and Biomolecular Chemistry, University of Goettingen, Goettingen, Germany. Electronic address: csteine@gwdg.de.
Bert L de GrootComputational Biomolecular Dynamics Group, Max-Planck Institute for Biophysical Chemistry, Goettingen, Germany. Electronic address: bgroot@gwdg.de.
Max Planck Institute for Biophysical Chemistry · DEUniversity of Göttingen · DEUniversity of Modena and Reggio Emilia · IT

Funding

European Research Council 282008
6 · The paper itself

Abstract

The voltage-dependent anion channel 1 (VDAC-1) is an important protein of the outer mitochondrial membrane that transports energy metabolites and is involved in apoptosis. The available structures of VDAC proteins show a wide β-stranded barrel pore, with its N-terminal α-helix (N-α) bound to its interior. Electrophysiology experiments revealed that voltage, its polarity, and membrane composition modulate VDAC currents. Experiments with VDAC-1 mutants identified amino acids that regulate the gating process. However, the mechanisms for how these factors regulate VDAC-1, and which changes they trigger in the channel, are still unknown. In this study, molecular dynamics simulations and single-channel experiments of VDAC-1 show agreement for the current-voltage relationships of an "open" channel and they also show several subconducting transient states that are more cation selective in the simulations. We observed voltage-dependent asymmetric distortions of the VDAC-1 barrel and the displacement of particular charged amino acids. We constructed conformational models of the protein voltage response and the pore changes that consistently explain the protein conformations observed at opposite voltage polarities, either in phosphatidylethanolamine or phosphatidylcholine membranes. The submicrosecond VDAC-1 voltage response shows intrinsic structural changes that explain the role of key gating amino acids and support some of the current gating hypotheses. These voltage-dependent protein changes include asymmetric barrel distortion, its interaction with the membrane, and significant displacement of N-α amino acids.

Indexed as

Amino AcidsAnimalsCationsEscherichia coliHumansMembrane PotentialsMembranes, ArtificialMiceMicellesMolecular Dynamics SimulationNuclear Magnetic Resonance, BiomolecularPatch-Clamp TechniquesProtein ConformationUnilamellar LiposomesVoltage-Dependent Anion Channel 1Amino AcidsCationsMembranes, ArtificialMicellesUnilamellar LiposomesVDAC1 protein, humanVdac1 protein, mouseVoltage-Dependent Anion Channel 1

Identifiers

PMID27653481
PMCPMC5034351
OpenAlexW2461518134

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.