厌氧氨氧化菌
念珠菌
自养
化学
细菌
亚硝酸盐
异养
生物化学
环境化学
戒毒(替代医学)
混合营养体
反硝化
生物
基因
有机化学
硝酸盐
反硝化细菌
基因组
氮气
替代医学
病理
医学
遗传学
作者
Xiao-Ming Ji,Zhuoying Wu,Shihwu Sung,Po‐Heng Lee
出处
期刊:Water Research
[Elsevier]
日期:2019-12-01
卷期号:166: 115039-115039
被引量:52
标识
DOI:10.1016/j.watres.2019.115039
摘要
The metabolisms of anaerobic ammonium oxidation (anammox) bacteria related to ammonia oxidation with nitrite reduction and autotrophic carbon fixation have been extensively observed. However, little is known about the specific metabolic pathways associated with oxygen detoxification and organic carbon utilization. To this end, we obtained high abundance of anammox species (∼50%) in a lab-scale continuous stirred-tank reactor (CSTR) at room temperature without strict anaerobic condition. The draft genome of the dominant anammox bacteria affiliated to Ca. Brocadia sp. was recovered. Its metabolic pathways and genes expression were reconstructed and examined through metagenomic and metatranscriptomic analyses. Interestingly, the results suggested that this anammox lineage likely performs oxygen detoxification with genes encoding superoxide dismutase (SOD) and cytochrome c peroxidase (Ccp). Moreover, the Ccp-activated hydrogen peroxide (intermediate of oxygen detoxification) reduction might be energetically beneficial for the observed acetate conversion related to cell synthesis of Ca. Brocadia sp. This study offers a comprehensive understanding on the diverse metabolic activities in anammox species affiliated to Ca. Brocadia sp., and expanded the applicability of anammox process.
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