Ochiai T, Asaoka T, Kato T, Osaka S, Dewa T, Yamashita K, Gardiner AT, Hashimoto H, Nango M. Molecular assembly of Zn porphyrin complexes using synthetic light-harvesting model polypeptides.
PHOTOSYNTHESIS RESEARCH 2008;
95:353-361. [PMID:
18049908 DOI:
10.1007/s11120-007-9280-z]
[Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2007] [Accepted: 11/15/2007] [Indexed: 05/25/2023]
Abstract
Synthetic single alpha-helix hydrophobic polypeptides, which have similar amino acid sequences to the hydrophobic core in the native light-harvesting 1-beta polypeptide from Rhodobacter sphaeroides, formed Zn porphyrin complexes on a gold electrode, as well as in n-octyl-beta-glucoside micelles: this process is dependent on the structure of the pigments and the polypeptides. Interestingly, an enhanced photoelectric current was observed when Zn mesoporphyrin monomer complexed with the synthetic light-harvesting model polypeptide in an alpha-helical configuration was assembled with a defined orientation onto the electrode. Analog of these light-harvesting model complexes are also useful in providing insights into the effect of polypeptide structure on the formation of light-harvesting complexes on and off electrodes.
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