Generation of ATP during Cytochrome-linked Anaerobic Electron Transport in Propionic Acid Bacteria

Electron transport-linked compared with proton-induced ATP generation in Thiobacillus novellus.

The apparently soluble electron-transport system, that does not sediment when centrifuged at 144,000 x g or 300,000 x g for 3 hr, catalyzes oxidative phosphorylation with an efficiency comparable to that of an intact mitochondrial system. While the proton-induced phosphorylation occurs in whole cells, crude cell-free extracts, and supernatants from low-speed centrifugation, it does not occur in...

Heme and menaquinone induced electron transport in lactic acid bacteria

BACKGROUND For some lactic acid bacteria higher biomass production as a result of aerobic respiration has been reported upon supplementation with heme and menaquinone. In this report, we have studied a large number of species among lactic acid bacteria for the existence of this trait. RESULTS Heme- (and menaquinone) stimulated aerobic growth was observed for several species and genera of lact...

Butyribacterium rettgeri: a Role of Lipoic Acid in Anaerobic Electron Transport

Butyribacterium rettgeri is an anaerobic bacterium that ferments glucose, pyruvate, or lactate, with the formation of acetate, butyrate, and CO:, as the major end products (lactate may also be a major product of the fermentation of pyruvate or glucose). Extensive studies in the laboratory of Barker have shown two unusual features of these fermentations (l-8). The first is that the observed low ...

Energy conservation via electron-transferring flavoprotein in anaerobic bacteria.

Impact of Propionic Acid on Liver Damage in Rats

Propionic acid (PA) is a short chain fatty acid, a common food preservative and metabolic end product of enteric bacteria in the gut. The present study was undertaken to investigate the effect of PA on liver injury in male rats. Male western albino rats were divided into two groups. The first group served as normal control, the second was treated with PA. The activities of serum hepatospecific ...