Energy metabolism of Bdellovibrio bacteriovorus. II. P/O ratio and ATP pool turnover rate.
The P/O ratio of Bdellovibrio bacteriovorus, strain Bd 109 Sa, was evaluated by two different methods based on the determination of energy-rich phosphate bonds and either NADH oxidation or oxygen-uptake. P/O values calculated on the basis of NADH oxidation were up to 6, which has to be regarded as being overestimated. P/O values calculated from energy-rich phosphate bonds and oxygen uptake were around 2. The P/O values determined for Escherichia coli B were similar. The loss of phosphorylation efficiency at one site is discussed. The ATP pool turnover rate of Bdellovibrio was 8/min during endogenous respiration and 24/min during substrate respiration. The corresponding values in Escherichia coli B were 3/min and 38/min.
D000255:Adenosine Triphosphate / Q000378:metabolism*; D001419:Bacteria / Q000378:metabolism*; D004734:Energy Metabolism; D004926:Escherichia coli / Q000378:metabolism; D009243:NAD / Q000378:metabolism; D010085:Oxidative Phosphorylation; D010101:Oxygen Consumption; D013045:Species Specificity
D009243:NAD; D000255:Adenosine Triphosphate