Photosynthesis 2.0: Realizing new-to-nature CO2-fixation to overcome the limits 
of natural metabolism

Erb, Tobias J.

doi:10.1101/cshperspect.a041669

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Photosynthesis 2.0: Realizing new-to-nature CO₂-fixation to overcome the limits of natural metabolism

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Erb, Tobias J.
Understanding and Building Metabolism, Department of Biochemistry and Synthetic Metabolism, Max Planck Institute for Terrestrial Microbiology, Max Planck Society;
Center for Synthetic Microbiology (SYNMIKRO), Philipps University of Marburg, Marburg;

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https://doi.org/10.1101/cshperspect.a041669
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Citation

Erb, T. J. (2023). Photosynthesis 2.0: Realizing new-to-nature CO₂-fixation to overcome the limits of natural metabolism. Cold Spring Harbor Perspectives in Biology, a041669. doi:10.1101/cshperspect.a041669.

Cite as: https://hdl.handle.net/21.11116/0000-000D-D252-9

Abstract

Synthetic biology provides opportunities to realize new-to-nature CO2-fixation metabolisms to overcome the limitations of natural photosynthesis. Two different strategies are currently being pursued: One is to realize engineered plants that feature carbon-neutral or carbon-negative (i.e., CO2-fixing) photorespiration metabolism, such as the tatronyl-CoA (TaCo) pathway, to boost CO2-uptake rates of photosynthesis between 20% and 60%. Another (arguably more radical) is to create engineered plants in which natural photosynthesis is fully replaced by an alternative CO2-fixation metabolism, such as the CETCH cycle, which carries the potential to improve CO2 uptake rates between 20% and 200%. These efforts could revolutionize plant engineering by expanding the capabilities of plant metabolism beyond the constraints of natural evolution to create highly improved crops addressing the challenges of climate change in the future.