NADP+ or CO2 reduction by frhAGB-encoded hydrogenase through interaction with formate dehydrogenase 3 in the hyperthermophilic archaeon Thermococcus onnurineus NA1.

Ji-In Yang, Hae-Chang Jung, Hyun-Myung Oh, Bo Gyoung Choi, Hyun Sook Lee, Sung Gyun Kang

Applied and environmental microbiology 2023 Dec 21

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The strategy using structural homology with the help of structure prediction by AlphaFold was very successful in finding potential targets for the frhAGB-encoded hydrogenase of Thermococcus onnurineus NA1. The finding that the hydrogenase can interact with FdhB to reduce the cofactor NAD(P)+ is significant in that the enzyme can function to supply reducing equivalents, just as F420-reducing hydrogenases in methanogens use coenzyme F420 as an electron carrier. Additionally, it was identified that T. onnurineus NA1 could produce formate from H2 and CO2 by the concerted action of frhAGB-encoded hydrogenase and formate dehydrogenase Fdh3.

Citation

Ji-In Yang, Hae-Chang Jung, Hyun-Myung Oh, Bo Gyoung Choi, Hyun Sook Lee, Sung Gyun Kang. NADP+ or CO2 reduction by frhAGB-encoded hydrogenase through interaction with formate dehydrogenase 3 in the hyperthermophilic archaeon Thermococcus onnurineus NA1. Applied and environmental microbiology. 2023 Dec 21;89(12):e0147423