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;
7:1203-13. [PMID:
22043177 PMCID:
PMC3204410 DOI:
10.7150/ijbs.7.1203]
[Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2011] [Accepted: 09/07/2011] [Indexed: 12/02/2022] Open
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.
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