Enterobacteriaceae metabolism

Facultative anaerobic bacteria such as Enterobacteriaceae and Bacillus species produce organic acids and alcohols from pyruvate and NADH under anaerobic conditions in a way similar to anaerobic bacteria. However, the facultative anaerobes possess the pathways for aerobic metabolism, such as the TCA cycle and electron transport system (even under anaerobic condition), and quickly respond to the presence of oxygen to oxidize NADH via the by electron transport system. NADH are also produced in the TCA cycle as seen in Figure 4. In the presence of oxygen, hydrogen production stops. 

E. coli Salmonella branch. Although the physiological significance of such a gene replacement in the group of Enterobacteriaceae and, more generally, the presence of one or another form of NADSYN in various bacteria is unclear, it may be associated with certain aspects of nitrogen metabolism in these species. 

Figure 8 J Metabolic pathways used by Enterobacteriaceae species for breakdown of...

Many of the metabolic transformations for pesticide detoxification that occur in plants are also found in prokaryotes, especially co-metabolic transformations. Glutathione conjugation of the chloroacteamide herbicides is observed in many species of gram negative bacteria including Pseudomonas sp and various members of the Enterobacteriaceae (57). Most of the degradative steps for FE metabolism in plants (de-esterification to F, and subsequent... 

Many bacteria have the ability to produce ethanol, but relatively few taxa contain bacteria that produce ethanol as a major end product. Ethanol-producing species can be found among aerobic, anaerobic, and facultative anaerobic bacteria within the family Enterobacteriaceae and the genera Bacillus, Bacteroides, Bifidobacterium, Clostridium, Euhacterium, Lactobacillus, and many others (Wiegel 1980). Examples of mesophilic (O Table 3.4) and thermophilic (O Table 3.5) bacteria that can produce one or more moles of ethanol per mole of glucose metabolized have been compiled by Wiegel (Wiegel 1980,1992). 

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