Response of anaerobic ammonium-oxidizing bacteria to hydroxylamine Export

@article{citeulike:2858829, abstract = {Anaerobic ammonium oxidation is a recent addition to the microbial nitrogen cycle, and its metabolic pathway, including the production and conversion of its intermediate hydrazine, is not well understood. Therefore, the effect of hydroxylamine addition on the hydrazine metabolism of anammox bacteria was studied both experimentally and by mathematical modeling. It was observed that hydroxylamine was disproportionated biologically in the absence of nitrite into dinitrogen gas and ammonium. Little hydrazine accumulated during this process, however a rapid hydrazine production was observed when nearly all hydroxylamine was consumed. A mechanistic model is proposed in which hydrazine is suggested to be continuously produced from ammonium and hydroxylamine (possibly via nitric oxide), and subsequently oxidized to N2. The electron acceptor for the hydrazine oxidation is hydroxylamine, which is reduced to ammonium. A decrease in the hydroxylamine reduction rate therefore leads a decrease in the hydrazine oxidation rate, resulting in the observed hydrazine accumulation. The proposed mechanism was verified by a mathematical model which could explain and predict most of the experimental data.}, address = {Department of Biotechnology, Delft University of Technology, Delft, The Netherlands; Radboud University of Nijmegen, IWWR, Nijmegen, NL.}, author = {van der Star, Wouter R. L. and van de Graaf, Maarten J. and Kartal, Boran and Picioreanu, Cristian and Jetten, Mike S. M. and van Loosdrecht, Mark C. M.}, citeulike-article-id = {2858829}, citeulike-linkout-0 = {http://dx.doi.org/10.1128/AEM.00042-08}, citeulike-linkout-1 = {http://view.ncbi.nlm.nih.gov/pubmed/18515490}, citeulike-linkout-2 = {http://www.hubmed.org/display.cgi?uids=18515490}, day = {15}, doi = {10.1128/AEM.00042-08}, issn = {1098-5336}, journal = {Applied and environmental microbiology}, keywords = {anammox, hao, hydrazine, hydroxylamine, inhibition, nitric, nitrite, oxide}, month = {July}, number = {14}, pages = {4417--4426}, posted-at = {2008-06-03 12:37:16}, priority = {0}, title = {Response of anaerobic ammonium-oxidizing bacteria to hydroxylamine}, url = {http://dx.doi.org/10.1128/AEM.00042-08}, volume = {74}, year = {2008} }

TY - JOUR ID - citeulike:2858829 L3 - citeulike-article-id:2858829 N2 - Anaerobic ammonium oxidation is a recent addition to the microbial nitrogen cycle, and its metabolic pathway, including the production and conversion of its intermediate hydrazine, is not well understood. Therefore, the effect of hydroxylamine addition on the hydrazine metabolism of anammox bacteria was studied both experimentally and by mathematical modeling. It was observed that hydroxylamine was disproportionated biologically in the absence of nitrite into dinitrogen gas and ammonium. Little hydrazine accumulated during this process, however a rapid hydrazine production was observed when nearly all hydroxylamine was consumed. A mechanistic model is proposed in which hydrazine is suggested to be continuously produced from ammonium and hydroxylamine (possibly via nitric oxide), and subsequently oxidized to N2. The electron acceptor for the hydrazine oxidation is hydroxylamine, which is reduced to ammonium. A decrease in the hydroxylamine reduction rate therefore leads a decrease in the hydrazine oxidation rate, resulting in the observed hydrazine accumulation. The proposed mechanism was verified by a mathematical model which could explain and predict most of the experimental data. IS - 14 JF - Applied and environmental microbiology SN - 1098-5336 AD - Department of Biotechnology, Delft University of Technology, Delft, The Netherlands; Radboud University of Nijmegen, IWWR, Nijmegen, NL. EP - 4426 TI - Response of anaerobic ammonium-oxidizing bacteria to hydroxylamine VL - 74 SP - 4417 KW - anammox KW - hao KW - hydrazine KW - hydroxylamine KW - inhibition KW - nitric KW - nitrite KW - oxide AU - van der Star, Wouter AU - van de Graaf, Maarten AU - Kartal, Boran AU - Picioreanu, Cristian AU - Jetten, Mike AU - van Loosdrecht, Mark PY - 2008/07/15/ UR - http://dx.doi.org/10.1128/AEM.00042-08 ER -