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- Title
Analysis of the Disk-to-Disk Energy Transfer Processes in C-Phycocyanin Complexes by Computer Simulation Technique.
- Authors
Xie, Jie; Zhao, Jing-quan; Peng, Chenghang
- Abstract
Based on the crystal structure and spectral properties of C-phycocyanin (C-PC) from cyanobacteria, models for complexes with 2 and 3 C-PC hexamer disks were built and the energy transfer dynamic properties were studied by the use of stochastic computer simulation approach. In addition, an experimental parameter of 0.056 ps−1, corresponding to a time constant of 18 ps, derived from the previous time-resolved measurement, was used for simulation of the energy transfer process from the three terminal symmetrically equivalent β84 chromophores of the core-linked disk to an α84 chromophore of the allophycocyanin (APC) core. The simulation showed: ( 1) The disk-to-disk energy transfer can be as fast as several picoseconds. ( 2) The energy transfer efficiencies from the first disk to the core would depend on the length of the rod ( i.e. the number of disks). Efficiencies of 0.95, 0.87, and 0.75 were found for the rods with 1, 2 and 3 hexamer disks, respectively. ( 3) The energy transfer along a rod in a native phycobilisome (PBS) is probably very close to the one-way manner. It is the core of PBS that makes the excitation energy be transferred fast in a nearly one-way manner.
- Publication
Photosynthetica, 2002, Vol 40, Issue 2, p251
- ISSN
0300-3604
- Publication type
Article
- DOI
10.1023/A:1021353926065