固碳
自养
氧化剂
基因组
代谢途径
电子受体
细菌
化学
碳纤维
甘氨酸
生物化学
固定(群体遗传学)
微生物代谢
有机体
组合化学
生物
新陈代谢
氨基酸
有机化学
光合作用
基因
遗传学
材料科学
复合数
复合材料
作者
Israel A Figueroa,Tyler P. Barnum,Pranav Y. Somasekhar,Charlotte I. Carlström,Anna Engelbrektson,John D. Coates
标识
DOI:10.1073/pnas.1715549114
摘要
Significance Phosphite (HPO 3 2− ) is the most energetically favorable biological electron donor known, but only one organism capable of growing by phosphite oxidation has been previously identified. Here, we describe a phosphite-oxidizing bacterium that can grow with CO 2 as its sole electron acceptor, and we propose a metabolic model in which inorganic carbon is assimilated via the reductive glycine pathway. Although the reductive glycine pathway has previously been identified as a “synthetic” carbon fixation pathway, this study provides evidence that it may actually function as a natural autotrophic pathway. Our results suggest that phosphite may serve as a driver of microbial growth and carbon fixation in energy-limited environments, particularly in aphotic environments lacking alternative terminal electron acceptors.
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