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Int J Biol Sci 2011; 7(8):1203-1213. doi:10.7150/ijbs.7.1203

Research Paper

Photoactivation Studies of Zinc Porphyrin-Myoglobin System and Its Application for Light-Chemical Energy Conversion

Chin-Hao Chang1, Yi-Ting Hu1, Chen-Fu Lo2, Liyang Luo3, Hung-Ming Lin1, Cheng-Hsiang Chang1, Ching-Yao Lin2✉, Eric Wei-Guang Diau3✉, Tung-Kung Wu1✉

1. Department of Biological Science and Technology, National Chiao Tung University, 30068, Hsin-Chu, Taiwan, Republic of China
2. Department of Applied Chemistry, National Chi Nan University, Puli, Nantou County, Taiwan, Republic of China
3. Department of Applied Chemistry and Institute of Molecular Science, National Chiao Tung University, Hsin-Chu, Taiwan, Republic of China

Abstract

An artificial zinc porphyrin-myoglobin-based photo-chemical energy conversion system, consisting of ZnPP-Mb or ZnPE1-Mb as a photosensitizer, NADP+ as an electron acceptor, and triethanolamine as an electron donor, has been constructed to mimic photosystem I. The photoirradiated product is able to reduce a single-electron acceptor protein cytochrome c, but cannot catalyze the two-electron reduction of acetaldehyde by alcohol dehydrogenase, thus demonstrating a single electron transfer mechanism. Furthermore, the artificial system can bifunctionally promote oxidoredox reactions, depending on the presence or absence of a sacrificial electron donor, thus suggesting its potential application in electrochemical regeneration steps involved in chemical transformation and/or energy conversion.

Keywords: photoelectrochemical energy conversion, zinc protoporphyrin, myoglobin, oxidoredox reaction, biosensitizer

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How to cite this article:
Chang CH, Hu YT, Lo CF, Luo L, Lin HM, Chang CH, Lin CY, Diau EWG, Wu TK. Photoactivation Studies of Zinc Porphyrin-Myoglobin System and Its Application for Light-Chemical Energy Conversion. Int J Biol Sci 2011; 7(8):1203-1213. doi:10.7150/ijbs.7.1203. Available from http://www.ijbs.com/v07p1203.htm