Bacterial metabolism - Phosphite oxidation by sulphate reduction
Bacterial metabolism - Phosphite oxidation by sulphate reduction
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DOI：
10.1038/35017644
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发表时间：
2000-07-06
期刊：
影响因子：
64.8
通讯作者：
Friedrich, M
中科院分区：
文献类型：
--
作者：
Schink, B;Friedrich, M
生物磷几乎完全以+ V氧化还原态的磷酸盐形式存在，尽管发现一些膦酸（+ III）和次膦酸（+ I）作为次级代谢物或作为膦酰基脂质的成分。在这里，我们表明，培养纯化的海洋沉积物在威尼斯的一个lithautotrophic细菌可以生长厌氧氧化亚磷酸盐（+ III）磷酸盐（+ V），同时减少硫酸氢硫化物。据我们所知，这是第一次描述微生物能量代谢中涉及磷的氧化还原反应，这种活动可能在早期地球上运作，并可能代表一种古老的进化特征。
Biological phosphorus occurs almost exclusively as phosphate in the redox state of + V, although a few phosphonic (+ III) and phosphinic (+ I) acids are found as secondary metabolites or as constituents of phosphonolipids. Here we show that a culture of a lithoautotrophic bacterium purified from marine sediments in Venice can grow by anaerobic oxidation of phosphite (+ III) to phosphate (+ V) while simultaneously reducing sulphate to hydrogen sulphide. To our knowledge, this is the first description of a redox reaction involving phosphorus in microbial energy metabolism, an activity that might have operated on the early Earth and which could represent an ancient evolutionary trait.