Cross-reconstitution of isolated F1-ATPase from potato tuber mitochondria with F1-depleted beef heart and yeast submitochondrial particles.

Cross-reconstitution of isolated potato mitochondrial F1-ATPase with F1-depleted beef heart and yeast submitochondrial particles is reported. Potato F1 binds to the heterologous membrane and confers oligomycin sensitivity on the ATPase activity of the reconstituted system. Binding of F1 is promoted by the presence of Mg2+ with the maximal stimulatory effect at 20 mM. Mg2+ increase the sensitivity to oligomycin of the reconstituted system consisting of potato F1 and yeast membranes, however, they do not influence oligomycin sensitivity of potato F1 and beef heart membranes.