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The protein IF1 limits mitochondrial ATP consumption when mitochondrial respiration is impaired by inhibiting the ‘reverse’ activity of the F 1 F o -ATPsynthase. We have found that IF1 also increases F 1 F o -ATPsynthase activity in respiring mitochondria, promoting its dimerization and increasing the density of mitochondrial cristae. We also noted that IF1 overexpression...
When mitochondrial respiration is compromised, the F 1 F o -ATP synthase reverses and consumes ATP, serving to maintain the mitochondrial membrane potential (Δψ m ). This process is mitigated by IF 1 . As little is known of the cell biology of IF 1 , we have investigated the functional consequences of varying IF 1 expression. We report that, (1) during...
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