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Metabolic design for cyanobacterial chemical synthesis

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Abstract

Photosynthetic chemical production in cyanobacteria is a promising technology for renewable energy, CO2 mitigation, and fossil fuel replacement. Metabolic engineering has enabled a direct biosynthetic process from CO2 fixation to chemical feedstocks and biofuels, without requiring costly production, storage, and breakdown of cellulose or sugars. However, direct production technology is challenged by a need to achieve high-carbon partitioning to products in order to be competitive. This review discusses principles for the design of biosynthetic pathways in cyanobacteria and describes recent advances in relevant genetic tools. This field is at a critical juncture in assessing the strength and feasibility of carbon partitioning. To address this, we have included the stoichiometry of reducing equivalents and carbon conservation for heterologous pathways, and a method for calculating product yields against a theoretical maximum.

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Acknowledgments

This study was supported by a National Science Foundation grant (1066182). We thank Lisa A. Anderson, Nicole E. Nozzi, and Christine A. Rabinovitch-Deere (UC Davis) for critical reading of the manuscript.

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Correspondence to Shota Atsumi.

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Oliver, J.W.K., Atsumi, S. Metabolic design for cyanobacterial chemical synthesis. Photosynth Res 120, 249–261 (2014). https://doi.org/10.1007/s11120-014-9997-4

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  • DOI: https://doi.org/10.1007/s11120-014-9997-4

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