期刊
SCIENCE
卷 354, 期 6314, 页码 900-904出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aah5237
关键词
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资金
- European Research Council [ERC 637675]
- Swiss National Science Foundation Ambizione grant [PZ00P3_136828/1]
- ETH Zurich grant [ETH-41 12-2]
- Max Planck Society
- [DE-AC02-05CH11231]
- Swiss National Science Foundation (SNF) [PZ00P3_136828] Funding Source: Swiss National Science Foundation (SNF)
Carbon dioxide (CO2) is an important carbon feedstock for a future green economy. This requires the development of efficient strategies for its conversion into multicarbon compounds. We describe a synthetic cycle for the continuous fixation of CO2 in vitro. The crotonyl-coenzyme A (CoA)/ethylmalonyl-CoA/hydroxybutyryl-CoA (CETCH) cycle is a reaction network of 17 enzymes that converts CO2 into organic molecules at a rate of 5 nanomoles of CO2 per minute per milligram of protein. The CETCH cycle was drafted by metabolic retrosynthesis, established with enzymes originating from nine different organisms of all three domains of life, and optimized in several rounds by enzyme engineering and metabolic proofreading. The CETCH cycle adds a seventh, synthetic alternative to the six naturally evolved CO2 fixation pathways, thereby opening the way for in vitro and in vivo applications.
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