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We showed recently that the yeast mitochondrial intermediate peptidase (YMIP polypeptide; gene symbol, OCT1) promotes mitochondrial iron uptake by catalyzing the maturation of iron-utilizing proteins and exacerbates the mitochondrial iron accumulation that results from loss of yeast frataxin, a mitochondrial protein required for mitochondrial iron efflux. This suggests that the human MIP (HMIP polypeptide;...
The mitochondrial intermediate peptidase ofSaccharomyces cerevisiae(YMIP) is a component of the yeast mitochondrial protein import machinery critically involved in the biogenesis of the oxidative phosphorylation (OXPHOS) system. This leader peptidase removes specific octapeptides from the amino terminus of nuclear-encoded OXPHOS subunits and components of the mitochondrial genetic apparatus. To address...
Mitochondrial intermediate peptidase (MIP) is a component of the mitochondrial protein import machinery required for maturation of nuclear-encoded precursor proteins targeted to the mitochondrial matrix or inner membrane. We previously characterized this enzyme in rat (RMIP) and Saccharomyces cerevisiae (YMIP) and showed that MIP activity is essential for mitochondrial function in yeast. We have now...
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