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. 1979 Dec 6;548(3):484-99.
doi: 10.1016/0005-2728(79)90060-4.

Reduction of nitrite to nitrous oxide by a cytoplasmic membrane fraction from the marine denitrifier Pseudomonas perfectomarinus

Reduction of nitrite to nitrous oxide by a cytoplasmic membrane fraction from the marine denitrifier Pseudomonas perfectomarinus

W G Zumft et al. Biochim Biophys Acta. .

Abstract

A cytoplasmic membrane fraction from the marine denitrifier Pseudomonas perfectomarinus reduced nitrite to nitrous oxide in a stoichiometric reaction without nitric oxide as free intermediate. The membrane system had a specific requirement for FMN with NAD(P)H as electron donors. Other electron donors were ascorbate-reduced cytochrome c-551 or phenazine methosulfate. The membrane fraction contained tightly bound cytochrome cd which represented only a small portion of the total cytochrome cd of the cell. As further terminal oxidase cytochrome o was identified. The membrane fraction produced also nitrous oxide from nitric oxide, however, at a substantially lower rate than from nitrite when using ascorbate-reduced phenazine methosulfate as electron donor.

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