Cited by 396Mitochondrial Function and PathologyIon channel regulation and functionATP Synthase and ATPases Research

Calcium binding and translocation by the voltage-dependent anion channel: a possible regulatory mechanism in mitochondrial function

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GINCEL, Dan, ZAID, Hilal, SHOSHAN-BARMATZ, Varda·2001·Biochemical Journal

Abstract

Mitochondria play a central role in energy metabolism, Ca2+ signalling, aging and cell death. To control cytosolic or mitochondrial Ca2+ concentration, mitochondria possess several Ca2+-transport systems across the inner membrane. However, the pathway for Ca2+ crossing the outer membrane has not been directly addressed. We report that purified voltage-dependent anion channel (VDAC) reconstituted into lipid bilayers or liposomes is highly permeable to Ca2+. VDAC contains Ca2+-binding sites that bind Ruthenium Red (RuR), La3+ and that RuR completely closed VDACs in single or multichannel experiments. Energized, freshly prepared mitochondria accumulate Ca2+ (500–700nmol/mg of protein), and subsequently released it. The release of Ca2+ is accompanied by cyclosporin A-inhibited swelling, suggesting activation of permeability transition pore (PTP). RuR and ruthenium amine binuclear complex, when added to mitochondria after Ca2+ accumulation has reached a maximal level and before PTP is activated, prevented the release of Ca2+ and the accompanied mitochondrial swelling. RuR also prevented PTP opening promoted by atractyloside, an adenine nucleotide translocase inhibitor. These results suggest that VDAC, located in the mitochondrial outer membrane, controls Ca2+ transport into and from the mitochondria, and that the inhibition of Ca2+ uptake by RuR and La3+ may result from their interaction with VDAC Ca2+-binding sites. Inhibition of PTP opening or assembly by RuR and ruthenium amine binuclear complex suggest the involvement of VDAC in PTP activity and/or regulation. The permeability of VDAC to Ca2+ and its binding of Ca2+, suggest that VDAC has a role in regulation of the mitochondrial Ca2+ homoeostasis.

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Crossref · 10.1042/bj3580147

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  • VDAC in the outer mitochondrial membrane is important for Ca2+ in- and outflux of mitochondria.

    “It has been reported that VDAC located in the outer mitochondrial membrane is important for the in-and outflux of Ca 2ϩ of the mitochondria (43)”

    From Simvastatin Effects on Skeletal Muscle (2013) · cites this paper as [43]

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Authors
GINCEL, D., ZAID, H., & SHOSHAN-BARMATZ, V.
Affiliations
  • Ben-Gurion University of the Negev (IL)
  • Department of Life Sciences and Zlotowski Center for Neuroscience, Ben Gurion University of the Negev, Beer Sheva, P.O.B. 653, 84105 Israel
Venue
Biochemical Journal
Published
2001-08-08
Volume
358
Issue
1
Pages
147-155
ISSN
  • 0264-6021 (ISSN-L)
  • 1470-8728
OpenAlex
W2012135330
Cited by
396
References
0
Citations by year
2026: 8 · 2025: 8 · 2024: 15 · 2023: 9 · 2022: 18 · 2021: 28 · 2020: 14 · 2019: 12 · 2018: 12 · 2017: 21 · 2016: 22 · 2015: 9 · 2014: 19 · 2013: 14 · 2012: 20
FWCI
4.20
Type
journal article
Language
en
Open access
Locations
  • Biochemical Journal (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ion channel regulation and function
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › ATP Synthase and ATPases Research
Keywords
voltage-dependent anion channel, mitochondrial outer membrane, calcium transport, calcium binding sites, ruthenium red, lanthanum, mitochondrial permeability transition pore, mitochondrial calcium homeostasis, mitochondrial swelling, cyclosporine, atractyloside, adenine nucleotide translocase, calcium release
MeSH terms
Animals, Anions, Binding Sites, Calcium, Dose-Response Relationship, Drug, Electrophoresis, Polyacrylamide Gel, Humans, Intracellular Membranes, Ion Channels, Kinetics, Lanthanum, Lipid Bilayers, Liposomes, Mitochondria, Mitochondria, Liver, Models, Biological, Protein Binding, Ruthenium Red, Time Factors, Models, Statistical, Signal Transduction, Cyclosporine, Porins, Voltage-Dependent Anion Channels, Rats

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