PUBLICATION

High Resolution Structure and Double Electron-Electron Resonance of the Zebrafish Voltage-dependent Anion Channel 2 Reveal an Oligomeric Population

Authors
Schredelseker, J., Paz, A., López, C.J., Altenbach, C., Leung, C.S., Drexler, M.K., Chen, J.N., Hubbell, W.L., Abramson, J.
ID
ZDB-PUB-140513-355
Date
2014
Source
The Journal of biological chemistry   289: 12566-77 (Journal)
Registered Authors
Chen, Jau-Nian, Schredelseker, Johann
Keywords
Biophysics, DEER, Ion Channels, Mitochondria, VDAC2, X-ray Crystallography, Zebrafish
MeSH Terms
  • Amino Acid Sequence
  • Animals
  • Crystallography, X-Ray
  • Cysteine/chemistry
  • Cysteine/genetics
  • Cysteine/metabolism
  • Electric Conductivity
  • Electron Spin Resonance Spectroscopy/methods*
  • Electrophoresis, Polyacrylamide Gel
  • Lipid Bilayers/chemistry
  • Models, Molecular
  • Molecular Sequence Data
  • Mutation
  • Protein Conformation
  • Protein Multimerization*
  • Protein Structure, Secondary
  • Sequence Homology, Amino Acid
  • Static Electricity
  • Voltage-Dependent Anion Channel 2/chemistry*
  • Voltage-Dependent Anion Channel 2/genetics
  • Voltage-Dependent Anion Channel 2/metabolism
  • Zebrafish Proteins/chemistry*
  • Zebrafish Proteins/genetics
  • Zebrafish Proteins/metabolism
PubMed
24627492 Full text @ J. Biol. Chem.
Abstract
In recent years, there has been a vast increase in structural and functional understanding of VDAC1, but VDAC2 and -3 have been understudied despite having many unique phenotypes. One reason for the paucity of structural and biochemical characterization of the VDAC2 and -3 isoforms stems from the inability of obtaining purified, functional protein. Here we demonstrate the expression, isolation, and basic characterization of zebrafish VDAC2 (zfVDAC2). Further, we resolved the structure of zfVDAC2 at 2.8 Å resolution, revealing a crystallographic dimer. The dimer orientation was confirmed in solution by double electron-electron resonance spectroscopy and by cross-linking experiments disclosing a dimer population of ~20% in lauryldimethine amine oxide detergent micelles, whereas in lipidic bicelles a higher population of dimeric and higher order oligomers species were observed. The present study allows for a more accurate structural comparison between VDAC2 and its better-studied counterpart VDAC1.
Genes / Markers
Figures
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Expression
Phenotype
Mutation and Transgenics
Human Disease / Model Data
Sequence Targeting Reagents
Fish
Antibodies
Orthology
Engineered Foreign Genes
Mapping
Errata and Notes