Article
Molecular mechanism of the ATP synthase's F(o) motor probed by mutational analyses of subunit a.
Journal of molecular biology - 13 Sept 2002
Wehrle Franziska, Kaim Georg, Dimroth Peter
Abstract excerpt
The most prominent residue of subunit a of the F(1)F(o) ATP synthase is a universally conserved arginine (aR227 in Propionigenium modestum), which was reported to permit no substitution with retention of ATP synthesis or H(+)-coupled ATP hydrolysis activity. We show here that ATP synthases with R227K or R227H mutations in the P.modestum a subunit catalyse ATP-driven Na(+) transport above or below pH 8.0,...
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