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Engineering of formate dehydrogenase for improving conversion potential of carbon dioxide to formate

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Abstract

Formate dehydrogenase (FDH) is a D-2-hydroxy acid dehydrogenase, which can reversibly reduce CO2 to formate and thus act as non-photosynthetic CO2 reductase. In order to increase catalytic efficiency of formate dehydrogenase for CO2 reduction, two mutants V328I/F285W and V354G/F285W were obtained of which reduction activity was about two times more than the parent CbFDHM2, and the formate production from CO2 catalyzed by mutants were 2.9 and 2.7-fold higher than that of the parent CbFDHM2. The mutants had greater potential in CO2 reduction. The optimal temperature for V328I/F285W and V354G/F285W was 55 °C, and they showed increasement of relative activity under 45 °C to 55 °C compared with parent. The optimal pH for the mutants was 9.0, and they showed excellent stability in pH 4.0–11.5. The kcat/Km values of mutants were 1.75 times higher than that of the parent. Then the molecular basis for its improvement of biochemical characteristics were preliminarily elucidated by computer-aided methods. All of these results further established a solid foundation for molecular modification of formate dehydrogenase and CO2 reduction.

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The data that support the findings of this study are available on request from the corresponding author.

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Acknowledgements

This work was supported by the Grants from Scientific and Technological Project of China (31900916), the Program for Science&Technology Innovation Talents in Universities of Henan Province (No. 21HASTIT041) and the Central Government Guide Local Science and Technology Development Fund Project of Henan Province (Z20221343035), Henan Province Young Scientist Project (225200810076).

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H-LS: Methodology, Investigation. S-WY: Investigation, Software. X-QX:Investigation, Data curation. Y-LX:Investigation. CY: Conceptualization, Writing—Original Draft. Y-JZ: Investigation, Data curation. L-GY: Writing—Reviewing and Editing. CX: Funding acquisition and Editing. C-DT: Conceptualization, Writing— Reviewing and Editing

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Correspondence to Lun-Guang Yao, Chuang Xue or Cun-Duo Tang.

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Shi, HL., Yuan, SW., Xi, XQ. et al. Engineering of formate dehydrogenase for improving conversion potential of carbon dioxide to formate. World J Microbiol Biotechnol 39, 352 (2023). https://doi.org/10.1007/s11274-023-03739-5

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  • DOI: https://doi.org/10.1007/s11274-023-03739-5

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