文章基本信息

标题：Multi-Omic Dynamics Associate Oxygenic Photosynthesis with Nitrogenase-Mediated H2 Production in Cyanothece sp. ATCC 51142
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作者：Hans C. Bernstein ; Moiz A. Charania ; Ryan S. McClure 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2015
卷号：5
期号：1
DOI：10.1038/srep16004
语种：English
出版社：Springer Nature
摘要：To date, the proposed mechanisms of nitrogenase-driven photosynthetic H₂ production by the diazotrophic unicellular cyanobacterium Cyanothece sp . ATCC 51142 have assumed that reductant and ATP requirements are derived solely from glycogen oxidation and cyclic-electron flow around photosystem I. Through genome-scale transcript and protein profiling, this study presents and tests a new hypothesis on the metabolic relationship between oxygenic photosynthesis and nitrogenase-mediated H₂ production in Cyanothece 51142. Our results show that net-positive rates of oxygenic photosynthesis and increased expression of photosystem II reaction centers correspond and are synchronized with nitrogenase expression and H₂ production. These findings provide a new and more complete view on the metabolic processes contributing to the energy budget of photosynthetic H₂ production and highlight the role of concurrent photocatalytic H₂O oxidation as a participating process.