scholarly journals Synthetic ubiquinones specifically bind to mitochondrial voltage-dependent anion channel of Saccharomyces cerevisiae

2016 ◽  
Vol 1857 ◽  
pp. e49-e50
Author(s):  
Masatoshi Murai ◽  
Ayaka Okuda ◽  
Takenori Yamamoto ◽  
Yasuo Shinohara ◽  
Hideto Miyoshi
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Anion Channel ◽  
Voltage Dependent Anion Channel ◽  
Voltage Dependent

scholarly journals Mitochondrial Voltage-Dependent Anion Channel Protein Por1 Positively Regulates the Nuclear Localization of Saccharomyces cerevisiae AMP-Activated Protein Kinase

mSphere ◽  
2018 ◽  
Vol 3 (1) ◽  
Author(s):  
Aishwarya Shevade ◽  
Vera Strogolova ◽  
Marianna Orlova ◽  
Chay Teng Yeo ◽  
Sergei Kuchin
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Nuclear Localization ◽  
Atp Release ◽  
Anion Channel ◽  
Voltage Dependent Anion Channel ◽  
Catalytic Activation ◽  
Evolutionarily Conserved ◽  
Voltage Dependent ◽  
Energy Limitation ◽  
Amp Activated Protein Kinase

AMP-activated protein kinases (AMPKs) sense energy limitation and regulate transcription and metabolism in eukaryotes from yeast to humans. In mammals, AMPK responds to increased AMP-to-ATP or ADP-to-ATP ratios and is implicated in diabetes, heart disease, and cancer. Mitochondria produce ATP and are generally thought to downregulate AMPK. Indeed, some antidiabetic drugs activate AMPK by affecting mitochondrial respiration. ATP release from mitochondria is mediated by evolutionarily conserved proteins known as voltage-dependent anion channels (VDACs). One would therefore expect VDACs to serve as negative regulators of AMPK. However, our experiments in yeast reveal the existence of an opposite relationship. We previously showed that Saccharomyces cerevisiae VDACs Por1 and Por2 positively regulate AMPK/Snf1 catalytic activation. Here, we show that Por1 also plays an important role in promoting AMPK/Snf1 nuclear localization. Our counterintuitive findings could inform research in areas ranging from diabetes to cancer to fungal pathogenesis.

Pentenediol-Type Compounds Specifically Bind to Voltage-Dependent Anion Channel 1 in Saccharomyces cerevisiae Mitochondria

Biochemistry ◽  
2019 ◽  
Vol 58 (8) ◽  
pp. 1141-1154 ◽  
Author(s):  
Yufu Unten ◽  
Masatoshi Murai ◽  
Takenori Yamamoto ◽  
Akira Watanabe ◽  
Naoya Ichimaru ◽  
...  
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Anion Channel ◽  
Voltage Dependent Anion Channel ◽  
Saccharomyces Cerevisiae Mitochondria ◽  
Voltage Dependent

scholarly journals VDAC1 in the diseased myocardium and the effect of VDAC1-interacting compound on atrial fibrosis induced by hyperaldosteronism

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Hadar Klapper-Goldstein ◽  
Ankit Verma ◽  
Sigal Elyagon ◽  
Roni Gillis ◽  
Michael Murninkas ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Apoptotic Cell ◽  
Anion Channel ◽  
Immunohistochemical Analysis ◽  
Voltage Dependent Anion Channel ◽  
Cardiac Tissues ◽  
Therapeutic Implications ◽  
Voltage Dependent ◽  
Models Of Lupus

AbstractThe voltage-dependent anion channel 1 (VDAC1) is a key player in mitochondrial function. VDAC1 serves as a gatekeeper mediating the fluxes of ions, nucleotides, and other metabolites across the outer mitochondrial membrane, as well as the release of apoptogenic proteins initiating apoptotic cell death. VBIT-4, a VDAC1 oligomerization inhibitor, was recently shown to prevent mitochondrial dysfunction and apoptosis, as validated in mouse models of lupus and type-2 diabetes. In the present study, we explored the expression of VDAC1 in the diseased myocardium of humans and rats. In addition, we evaluated the effect of VBIT-4 treatment on the atrial structural and electrical remodeling of rats exposed to excessive aldosterone levels. Immunohistochemical analysis of commercially available human cardiac tissues revealed marked overexpression of VDAC1 in post-myocardial infarction patients, as well as in patients with chronic ventricular dilatation\dysfunction. In agreement, rats exposed to myocardial infarction or to excessive aldosterone had a marked increase of VDAC1 in both ventricular and atrial tissues. Immunofluorescence staining indicated a punctuated appearance typical for mitochondrial-localized VDAC1. Finally, VBIT-4 treatment attenuated the atrial fibrotic load of rats exposed to excessive aldosterone without a notable effect on the susceptibility to atrial fibrillation episodes induced by burst pacing. Our results indicate that VDAC1 overexpression is associated with myocardial abnormalities in common pathological settings. Our data also indicate that inhibition of the VDAC1 can reduce excessive fibrosis in the atrial myocardium, a finding which may have important therapeutic implications. The exact mechanism\s of this beneficial effect need further studies.

scholarly journals Identification of two voltage-dependent anion channel-like protein sequences conserved in Kinetoplastida

2012 ◽  
Vol 8 (3) ◽  
pp. 446-449 ◽  
Author(s):  
Nadine Flinner ◽  
Enrico Schleiff ◽  
Oliver Mirus
Keyword(s):  
Outer Membrane ◽  
Trypanosoma Brucei ◽  
Protein Sequences ◽  
Anion Channel ◽  
Mitochondrial Outer Membrane ◽  
Voltage Dependent Anion Channel ◽  
Voltage Dependent

The eukaryotic porin superfamily consists of two families, voltage-dependent anion channel (VDAC) and Tom40, which are both located in the mitochondrial outer membrane. In Trypanosoma brucei , only a single member of the VDAC family has been described. We report the detection of two additional eukaryotic porin-like sequences in T. brucei . By bioinformatic means, we classify both as putative VDAC isoforms.

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