Biochemistry and Physiology of Anaerobic Bacteria by LG Ljungdahl, MW Adams, LL Barton, JG Ferry, MK Johnson

By LG Ljungdahl, MW Adams, LL Barton, JG Ferry, MK Johnson (Eds.)

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1994) also demonstrated binding of CO to the active site, at that time still believed to consist of nickel only. At the present level of understanding of the active Ni-Fe site, these data indicate that the 2060 cm-1 band of the externally added CO is best interpreted as CO binding (end-on) to nickel and not to iron. A higher frequency is expected for binding to iron (like that of the internal CO bound to iron), and vibrational interaction with the internal CO would be expected as well. None of the inactive states can bind CO; activation is absolutely required (Bagley et al.

Molisch (1907), J. B. van Niel (1931). The fifth mode of energy generation, chemosynthesis or lithotrophy, was discovered by the Russian botanist Sergius N. Winogradsky (1856–1953), when he was working in the laboratory of Anton de Bary (1831–1888) in Strassburg in 1887. Originally, he intented to reevaluate the monomorphism–pleomorphism controversy and chose Beggiatoa as a model organism. He collected the black mud surface of ponds and observed Beggiatoa filaments under the microscope. He saw the filaments accumulate sulfur droplets intracellulary, when he added hydrogen sulfide, and saw the droplets disappear when hydrogen sulfide was absent.

Nickel-iron hydrogenases: structural and functional properties. Struct Bonding 90:98–126. Happe RP, Roseboom W, Albracht SPJ. 1999. Pre-steady-state kinetics of the reactions of [NiFe]-hydrogenase from Chromatium vinosum with H2 and CO. Eur J Biochem 259:602–9. Happe RP, Roseboom W, Egert G, et al. 2000. Unusual FTIR and EPR properties of the H2-activating site of the cytoplasmic NAD-reducing hydrogenase from Ralstonia eutropha. FEBS Lett 446:259–63. Happe RP, Roseboom W, Pierik AJ, et al. 1997.

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