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. 2009 Dec;155(Pt 12):4093–4103. doi: 10.1099/mic.0.032961-0

Table 2.

Denitrification reductases within Neisseria species compared with R. eutropha H16

Species and strain Nitrate reductase Nitrite reductase Nitric oxide reductase Nitrous oxide reductasea
N. gonorrhoeae FA 1090 † NirK: aniA NorZ: norB NosR*Z*D*FYLX*
N. meningitidis Z2491 † NirK: aniA NorZ: norB NosRΔZ†DΔF*YΔLX*
N. meningitidis MC58 † NirK: aniA NorZ: norB NosRΔZ†DΔF*YΔLX*
N. meningitidis FAM18 † NirK: aniA NorZ: norB NosRΔZ†DΔF*YΔLX*
N. meningitidis 053442 † † NorZ: norB NosRΔZ†DΔF*YΔLX*
N. lactamica ATCC 23970 † NirK: aniA NorZ: norB NosRZDFYLX
N. cinerea ATCC 14685 † NirK: aniA NorZ: norB NosRZDFYLX
N. subflava NJ9703 † NirK: aniA NorZ: norB NosRZDFYLX
N. mucosa ATCC 25996 NarG NirK: aniA NorZ: norB NosRZ*DFΔYLX
N. flavescens NRL 30031 † NirK: aniA NorZ: norB NosRZDFYLX
N. sicca ATCC 29256 † NirK: aniA NorZ: norB NosRZDFYLX
R. eutrophab H16 NarG NapA NirS NorZ: norB NorZ: norB2 NosRZDFYLX

aThe full Nos regulon is shown in order to indicate which accessory, assembly or catalytic subunits are present in their entirety versus those strains having coding regions with mutations.

†Gene is absent from the genome in its entirety.

*Gene contains a premature stop codon.

ΔGene is partially deleted.

bThe specific amino acid sequences used to search for denitrification reductases within Neisseria species. R. eutropha H16 contains both a membrane-bound nitrate reductase (NarG: NP_942905, PHG270) and a periplasmic nitrate reductase (NapA: NP_942849, PHG211), a cytochrome cd1-type nitrite reductase (NirS: YP_841789, H16_B2277), two qNor-type (NorZ) nitric oxide reductases (NorB: NP_942879, PHG244; NorB2: YP_841835, H16_B2323), and a nitrous oxide reductase (NosZ: NP_942887, PHG252). All of the reductases are found on megaplasmid pHG1 (AY305378), with the exception of NirS and one copy of NorB encoded on chromosome 2 (AM260480). These contain the genes encoding the catalytic portions of each respective reductase used as the amino acid query sequence within the tblastn algorithm of blast analysis. The R. eutropha H16 genome sequence accession numbers and locus numbers are also listed above when applicable.