Reference: Hapala L (1989) Growth defects in intramitochondrial energy depleted cells: role of mitochondrial biogenesis. Biochem Biophys Res Commun 159(2):612-7

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Abstract


Simultaneous inhibition of oxidative phosphorylation by rho- mutation and adenine nucleotide exchange by op1 mutation or bongkrekic acid results in intramitochondrial energy depletion and cessation of growth in yeast. Effect of energy depletion of mitochondria on mitochondrial biogenesis was studied in intact yeast cells. Immunoblot analysis revealed an overall decrease in cellular content of two mitochondrial proteins - ADP/ATP translocase and beta subunit of mitochondrial ATPase - together with their lower ability to reach the proper intramitochondrial compartment. Both effects indicate disturbed biogenesis of energy depleted mitochondria. Quantitative differences in growth abilities and mitochondrial damage observed in two studied systems - op1 rho- double mutants and rho- cells treated with bongkrekic acid - can be explained by different degree of intramitochondrial energy depletion due to leakiness of op1 mutation in op1 rho- cells.

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Hapala L
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