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Satomura T, Horinaga K, Tanaka S, Takamura E, Sakamoto H, Sakuraba H, Ohshima T, Suye SI. Construction of a novel bioanode for amino acid powered fuel cells through an artificial enzyme cascade pathway. Biotechnol Lett 2019; 41:605-611. [PMID: 30937578 DOI: 10.1007/s10529-019-02664-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Accepted: 03/20/2019] [Indexed: 11/29/2022]
Abstract
OBJECTIVE The construction of a novel bioanode based on L-proline oxidation using a cascade reaction pathway comprised of thermostable dehydrogenases. RESULTS A novel multi-enzymatic cascade pathway, containing four kinds of dehydrogenases from thermophiles (dye-linked L-proline dehydrogenase, nicotinamide adenine dinucleotide (NAD)-dependent Δ1-pyrroline-5-carboxylate dehydrogenase, NAD-dependent L-glutamate dehydrogenase and dye-linked NADH dehydrogenase), was designed for the generation of six-electrons from one molecule of L-proline. The current density of the four-dehydrogenase-immobilized electrode, with a voltage of + 450 mV (relative to that of Ag/AgCl), was 226.8 μA/cm2 in the presence of 10 mM L-proline and 0.5 mM ferrocene carboxylate at 50 °C. This value was 4.2-fold higher than that of a similar electrode containing a single dehydrogenase. In addition, about 54% of the initial current in the multi-enzyme cascade bioanode was maintained even after 15 days. CONCLUSIONS Efficient deep oxidation of L-proline by multiple-enzyme cascade reactions was achieved in our designed electrode. The multi-enzyme cascade bioanode, which was built using thermophilic dehydrogenases, showed high durability at room temperature. The long-term stability of the bioanode indicates that it shows great potential for applications as a long-lived enzymatic fuel cell.
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Affiliation(s)
- Takenori Satomura
- Division of Engineering, Faculty of Engineering, University of Fukui, 3-9-1 Bunkyo, Fukui, 910-8507, Japan. .,Organization for Life Science Advancement Programs, University of Fukui, 3-9-1 Bunkyo, Fukui, 910-8507, Japan.
| | - Kousaku Horinaga
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, University of Fukui, 3-9-1 Bunkyo, Fukui, 910-8507, Japan
| | - Shino Tanaka
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, University of Fukui, 3-9-1 Bunkyo, Fukui, 910-8507, Japan
| | - Eiichiro Takamura
- Department of Frontier Fiber Technology and Science, Graduate School of Engineering, University of Fukui, 3-9-1 Bunkyo, Fukui, 910-8507, Japan
| | - Hiroaki Sakamoto
- Division of Engineering, Faculty of Engineering, University of Fukui, 3-9-1 Bunkyo, Fukui, 910-8507, Japan
| | - Haruhiko Sakuraba
- Department of Applied Biological Science, Faculty of Agriculture, Kagawa University, 2393 Ikenobe, Miki-cho, Kita-gun, Kagawa, 761-0795, Japan
| | - Toshihisa Ohshima
- Department of Biomedical Engineering, Faculty of Engineering, Osaka Institute of Technology, 5-16-1 Ohmiya, Asahi-ku, Osaka, 535-8585, Japan
| | - Shin-Ichiro Suye
- Division of Engineering, Faculty of Engineering, University of Fukui, 3-9-1 Bunkyo, Fukui, 910-8507, Japan.,Organization for Life Science Advancement Programs, University of Fukui, 3-9-1 Bunkyo, Fukui, 910-8507, Japan
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