Essential Role of Arginine Residues in the Interaction of F0 with F1 in Escherichia Coli ATP Synthase
In a wide variety of organisms the ATP synthase (F1F0; EC 188.8.131.52) plays a key role in energy metabolism. This enzyme has been described for mitochondria, chloroplasts and bacteria (for reviews, see refs. 1–3). Among these the ATP synthase complex of Escherichia coli has been most extensively characterized by both biochemical and genetic studies. As in all other ATP synthase systems, the E. coli complex is composed of two entities: the F1 sector is a peripheral protein and catalyzes the synthesis of ATP, whereas the F0 part is embedded in the cytoplasmic membrane and serves as a proton translocator. The ATP synthase works in a reversible manner, which means that it is also capable of building up an electrochemical proton gradient driven by ATP hydrolysis.
KeywordsATPase Activity Arginine Residue Adenosine Triphosphatase Proton Translocation Electrochemical Proton Gradient
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