Turnover number of F1F0 ATP synthase

Range 13 – 33 sec^-1
Organism Bacteria Escherichia coli
Reference Tomashek JJ, Glagoleva OB, Brusilow WS. The Escherichia coli F1F0 ATP synthase displays biphasic synthesis kinetics. J Biol Chem. 2004 Feb 6 279(6):4465-70 DOI: 10.1074/jbc.M310826200 p.4469 left columnPubMed ID14602713
Primary Source [18] Etzold C, Deckers-Hebestreit G, Altendorf K. Turnover number of Escherichia coli F0F1 ATP synthase for ATP synthesis in membrane vesicles. Eur J Biochem. 1997 Jan 15 243(1-2):336-43.PubMed ID9030757
Method Luciferase assay
Comments P.4467 right column bottom paragraph: "Previously, Etzold et al. (primary source) used the luciferase assay to measure the turnover number of the ATP synthase during synthesis by membrane vesicles of E. coli. They measured ATP synthesis rates of ∼0.060-0.10 μmol/min/mg of membrane protein at room temperature and 0.20 μmol/min/mg of membrane protein at 37 °C. They found that F1F0 makes up 3.3% of the E. coli membrane proteins, giving a turnover number of 13-33 s^-1, considerably lower than those of other F-type ATPase complexes measured under optimal conditions."
Entered by Uri M
ID 115177