E. Rees et al., STRUCTURAL GENE (NIRS) FOR THE CYTOCHROME CD(1) NITRITE REDUCTASE OF ALCALIGENES-EUTROPHUS H16, Applied and environmental microbiology, 63(2), 1997, pp. 800-802
Denitrification by Alcaligenes eutrophus H16 is genetically linked to
megaplasmid pHG1. Unexpectedly, the gene encoding the nitrite reductas
e (nirS) was identified on chromosomal DNA. The nirS product showed ex
tensive homology with periplasmic nitrite reductases of the heme cd(1)
-type. Disruption of nirS abolished nitrite-reducing ability, indicati
ng that NirS is the enzyme essential for denitrification in A. eutroph
us.