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The 2.8-Å structure of rat liver F1-ATPase: Configuration of a critical intermediate in ATP synthesis/hydrolysis

By Mario A. Bianchet, Joanne Hullihen, Peter L. Pedersen and L. Mario Amzel

Abstract

During mitochondrial ATP synthesis, F1-ATPase—the portion of the ATP synthase that contains the catalytic and regulatory nucleotide binding sites—undergoes a series of concerted conformational changes that couple proton translocation to the synthesis of the high levels of ATP required for cellular function. In the structure of the rat liver F1-ATPase, determined to 2.8-Å resolution in the presence of physiological concentrations of nucleotides, all three β subunits contain bound nucleotide and adopt similar conformations. This structure provides the missing configuration of F1 necessary to define all intermediates in the reaction pathway. Incorporation of this structure suggests a mechanism of ATP synthesis/hydrolysis in which configurations of the enzyme with three bound nucleotides play an essential role

Topics: Biological Sciences
Publisher: The National Academy of Sciences
Year: 1998
OAI identifier: oai:pubmedcentral.nih.gov:21596
Provided by: PubMed Central
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