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Cyanide Formation from Oxidation of Glycine by a Pseudomonas Species

Department of Biochemistry, The Royal Dental College, DK 8000 Århus C, Denmark

ABSTRACT

With whole cells of a hydrogen cyanide-producing bacterium strain C, of the genus Pseudomonas, it was found that the oxygen necessary for the oxidation of glycine to cyanide could be replaced by various artificial electron acceptors. The order of reactivity was: oxygen > phenazine methosulphate > methylene blue > 2,6-dichlorophenolindophenol > ferricyanide. Cyanide production was inhibited by pyrrolnitrin, a well-known inhibitor of many flavine enzymes. The molar ratio of added glycine to cyanide produced was found to be 1.09. With whole bacteria the apparent K_m (glycine) for the cyanide production was found to be 5.0 x 10^–4 M.

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