Anammox organism KSU-1 expresses a NirK-type copper-containing nitrite reductase instead of a NirS-type with cytochrome cd1
Anammox organism KSU-1 expresses a NirK-type copper-containing nitrite reductase instead of a NirS-type with cytochrome cd1
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DOI：
10.1016/j.febslet.2012.04.041
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发表时间：
2012-06-04
期刊：
影响因子：
3.5
通讯作者：
Fujii, Takao
中科院分区：
文献类型：
--
作者：
Hira, Daisuke;Toh, Hidehiro;Fujii, Takao
厌氧氨氧化（anammox）和反硝化作用是两个不同的微生物反应相关的全球氮循环。提出的厌氧氨氧化反应的初始步骤，亚硝酸盐还原为一氧化氮，被认为与细胞色素cd（1）型异化亚硝酸盐还原酶催化的反硝化作用相同。在这里，我们的特点是含铜的亚硝酸还原酶同系物编码的nirK检测的基因组中的厌氧氨氧化细菌菌株KSU-1。我们假设，这种NirK型亚硝酸盐还原酶，而不是细胞色素cd（1）型（NirS）的亚硝酸盐还原酶，可能催化亚硝酸盐还原在厌氧氨氧化微生物KSU-1。(C)2012年欧洲生物化学学会联合会。由Elsevier B出版。V.保留所有权利。
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. (C) 2012 Federation of European Biochemical Societies. Published by Elsevier B. V. All rights reserved.