Coordinate expression of the enzymes of nitric oxide metabolism in Paracoccus denitrificans

Kucera, I.; Gawlasová, J.

Biochemistry International 28(4): 701-706

1992


ISSN/ISBN: 0158-5231
PMID: 1482406
Document Number: 389729
Cellular activities of nitric oxide producing nitrite reductase (NiR) and nitric oxide reductase (NOR) in Paracoccus denitrificans increased in parallel upon anaerobic adaptation of aerobically grown cells. In addition, both activities exhibited comparable dependences on oxygen supply into the growing culture. The results suggest that the maintenance of a sufficiently high NOR/NiR activity ratio plays an important role in preventing nitric oxide accumulation and its toxic effects on the cells during denitrification.

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