Biological Nitrogen Removal Database

A manually curated data resource for microbial nitrogen removal

Enzyme Name Gene Culster Enzyme Commission number KEGG Orthology ID
Membrane-bound nitrate reductase narG, narH, narJ, narI, narZ, narY, narW, narV K00370 K00371 K00373 K00374 A membrane-bound enzyme which supports anaerobic respiration on nitrate under anaerobic conditions and in the presence of nitrate. Contains the bicyclic form of the molybdo-bis(molybdopterin guanine dinucleotide) cofactor, iron-sulfur clusters and heme b. Escherichia coli expresses two forms NarA and NarZ, both being comprised of three subunits. Link
Periplasmic nitrate reductase (cytochrome) napA, napB K02567 K02568 K02569 K02570 periplasmic nitrate reductase complex (NapAB) mainly catalyzes the initial reduction of nitrate to nitrite Link
Ntrite reductase (cytochrome c-552) nrfA K03385 Nitrite reduction to ammonium is mediated by a pentaheme cytochrome C nitrite reductase (NrfA) and is carried out without producing any intermediate N compound Link
cytoplasmic NADH-dependent nitrite reductase nirB
nirD K00362 Nitrite reduction to ammonium and is carried out without producing any intermediate N compound Link
Cytochrome P450 nitric oxide reductase P450nor K15877 nitric oxide reductase [NAD(P)+, nitrous oxide-forming] is responsible for reduction of nitric oxide to N2O Link
Nitrite reductase (NO-forming) nirK K00368 nirK is a copper-containing nitrite reductase (CuNiR) and a key catalytic enzyme in the environmental denitrification process that helps to produce nitric oxide from nitrite, molecular mechanism of denitrification process. Link