title: Photoactivation studies of zinc porphyrin-myoglobin system and its application for light-chemical energy conversion.
abstract: An artificial zinc porphyrin-myoglobin-based photo-chemical energy conversion system, consisting of ZnPP-Mb or ZnPE(1)-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.
authors: Department of Biological Science and Technology, National Chiao Tung University, Hsin-Chu, Taiwan, Republic of China.
authors: Chin-Hao
authors: CH
authors: Chang
authors: Yi-Ting
authors: YT
authors: Hu
authors: Chen-Fu
authors: CF
authors: Lo
authors: Liyang
authors: L
authors: Luo
authors: Hung-Ming
authors: HM
authors: Lin
authors: Cheng-Hsiang
authors: CH
authors: Chang
authors: Ching-Yao
authors: CY
authors: Lin
authors: Eric Wei-Guang
authors: EW
authors: Diau
authors: Tung-Kung
authors: TK
authors: Wu
mesh_terms: D045304:Cytochromes c / Q000378:metabolism; D004983:Ethanolamines / Q000378:metabolism*; D005454:Fluorescence Polarization; D008665:Metalloporphyrins / Q000378:metabolism*; D008956:Models, Chemical; D015394:Molecular Structure; D009211:Myoglobin / Q000378:metabolism*; D009249:NADP / Q000378:metabolism*; D010084:Oxidation-Reduction; D055668:Photochemical Processes; D017319:Photosensitizing Agents / Q000378:metabolism*; D010788:Photosynthesis / Q000502:physiology*
chemical_list: D004983:Ethanolamines; D008665:Metalloporphyrins; D009211:Myoglobin; D017319:Photosensitizing Agents; C017802:zinc hematoporphyrin; D009249:NADP; D045304:Cytochromes c; C009546:triethanolamine