An intermediate step in the evolution of ATPases: a hybrid F(0)-V(0) rotor in a bacterial Na(+) F(1)F(0) ATP synthase

The Na(+) F(1)F(0) ATP synthase operon of the anaerobic, acetogenic bacterium Acetobacterium woodii is unique because it encodes two types of c subunits, two identical 8 kDa bacterial F(0)-like c subunits (c(2) and c(3)), with two transmembrane helices, and a 18 kDa eukaryal V(0)-like (c(1)) c subun...

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