TY - JOUR
T1 - Anammox organism KSU-1 expresses a NirK-type copper-containing nitrite reductase instead of a NirS-type with cytochrome cd 1
AU - Hira, Daisuke
AU - Toh, Hidehiro
AU - Migita, Catharina T.
AU - Okubo, Hiroki
AU - Nishiyama, Takashi
AU - Hattori, Masahira
AU - Furukawa, Kenji
AU - Fujii, Takao
PY - 2012/6/4
Y1 - 2012/6/4
N2 - Anaerobic ammonium oxidation (anammox) and denitrification are two distinct microbial reactions relevant to the global nitrogen cycle. The proposed initial step of the anammox reactions, reduction of nitrite to nitric oxide, has been postulated to be identical to that in denitrification catalyzed by the dissimilatory nitrite reductase of the cytochrome cd 1-type. Here, we characterized the copper-containing nitrite reductase homolog encoded by nirK detected in the genome of an anammox bacterium strain KSU-1. We hypothesize that this NirK-type nitrite reductase, rather than a nitrite reductase of the cytochrome cd 1-type (NirS), is likely to catalyze nitrite reduction in anammox organism KSU-1.
AB - Anaerobic ammonium oxidation (anammox) and denitrification are two distinct microbial reactions relevant to the global nitrogen cycle. The proposed initial step of the anammox reactions, reduction of nitrite to nitric oxide, has been postulated to be identical to that in denitrification catalyzed by the dissimilatory nitrite reductase of the cytochrome cd 1-type. Here, we characterized the copper-containing nitrite reductase homolog encoded by nirK detected in the genome of an anammox bacterium strain KSU-1. We hypothesize that this NirK-type nitrite reductase, rather than a nitrite reductase of the cytochrome cd 1-type (NirS), is likely to catalyze nitrite reduction in anammox organism KSU-1.
KW - Anammox
KW - Copper-containing nitrite reductase
KW - Denitrification
KW - Dissimilatory nitrite reductase
UR - http://www.scopus.com/inward/record.url?scp=84861623768&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84861623768&partnerID=8YFLogxK
U2 - 10.1016/j.febslet.2012.04.041
DO - 10.1016/j.febslet.2012.04.041
M3 - Article
C2 - 22673575
AN - SCOPUS:84861623768
VL - 586
SP - 1658
EP - 1663
JO - FEBS Letters
JF - FEBS Letters
SN - 0014-5793
IS - 11
ER -