DOI: 10.1016/j.watres.2019.01.054
Scopus记录号: 2-s2.0-85061779557
论文题名: Bioenergetics analysis of ammonia-oxidizing bacteria and the estimation of their maximum growth yield
作者: González-Cabaleiro R. ; Curtis T.P. ; Ofiţeru I.D.
刊名: Water Research
ISSN: 431354
出版年: 2019
卷: 154 起始页码: 238
结束页码: 245
语种: 英语
英文关键词: Ammonia-oxidizing bacteria
; Bioenergetics
; Co-metabolisim
; Growth yield
英文摘要: The currently accepted biochemistry and bioenergetics of ammonia-oxidizing bacteria (AOB) show an inefficient metabolism: only 53.8% of the energy released when a mole of ammonia is oxidised and less than two of the electrons liberated can be directed to the autotrophic anabolism. However, paradoxically, AOB seem to thrive in challenging conditions: growing readily in virtually most aerobic environment, yet limited AOB exist in pure culture. In this study, a comprehensive model of the biochemistry of the metabolism of AOB is presented. Using bioenergetics calculations and selecting the minimum estimation for the energy dissipated in each of the metabolic steps, the model predicts the highest possible true yield of 0.16 gBio/gN and a yield of 0.13 gBio/gN when cellular maintenance is considered. Observed yields should always be lower than these values but the range of experimental values in literature vary between 0.04 and 0.45 gBio/gN. In this work, we discuss if this variance of observed values for AOB growth yield could be understood if other non-considered alternative energy sources are present in the biochemistry of AOB. We analyse how the predicted maximum growth yield of AOB changes considering co-metabolism, the use of hydroxylamine as a substrate, the abiotic oxidation of NO, energy harvesting in the monooxygenase enzyme or the use of organic carbon sources. © 2019 The Authors Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/121942
Appears in Collections: 气候变化事实与影响
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作者单位: School of Engineering, Newcastle University, Newcastle upon Tyne, NE1 7RU, United Kingdom; School of Engineering, Department of Infrastructure and Environment, University of Glasgow, Rankine Building, Glasgow, 12 8LT, United Kingdom
Recommended Citation:
González-Cabaleiro R.,Curtis T.P.,Ofiţeru I.D.. Bioenergetics analysis of ammonia-oxidizing bacteria and the estimation of their maximum growth yield[J]. Water Research,2019-01-01,154