The Electron Transport System and Hydrogenase of Paracoccus denitrificans
1981; Elsevier BV; Linguagem: Inglês
10.1016/b978-0-12-152512-5.50009-9
ISSN0070-2129
AutoresPaulette M. Vignais, Michèle-France Henry, Edith Sim, Douglas B. Kell,
Tópico(s)Wastewater Treatment and Nitrogen Removal
ResumoThis chapter discusses the electron transport system and hydrogenase of paracoccus denitrificans. One feature that characterizes bacteria is the ability to adapt to environmental changes and nutritional conditions. At the molecular level, the versatility of bacterial systems can be explained, at least in part, by adaptive changes in their respiratory chains. The Paracoccus denitrificans, formerly Micrococcus denitrificans Beijerinck, is a respiratory “jack-of-all-trades” and a very good example of adaptation of the electron-transport chain to changing growth conditions. The changes in bacterial respiratory chains occur most often at the level of the terminal oxidases, and this is exemplified in P. denitrificans. Although, it is an aerobic bacterium, P. denitrificans can use nitrate, nitrite, and nitrous oxide as terminal electron acceptors. However, it is unable to use organic compounds as electron acceptors for anaerobic growth, and so is nonfermentative. Besides utilizing a variety of terminal electron acceptor molecules, P. denitrificans can grow on a diverse range of carbon compounds from methanol to sucrose
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