Lateral energy transfer model for adjacent light-harvesting antennae rods of C-phycocyanins |
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Authors: | Anil K Padyana S Ramakumar |
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Institution: | a Department of Physics, Indian Institute of Science, Bangalore-560012, India b Bioinformatics Centre, Indian Institute of Science, Bangalore-560012, India |
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Abstract: | Modeling of excitation transfer pathways have been carried out for the structure of Spirulina platensis C-phycocyanin. Calculations by Förster mechanism using the crystal structure coordinates determined in our laboratory indicate ultra-fast lateral energy transfer rates between pairs of chromophores attached to two adjacent hexamer disks. The pairwise transfer times of the order of a few pico-seconds correspond to resonance transitions between peripheral β155 chromophores. A quantitative lateral energy transfer model for C-phycocyanin light-harvesting antenna rods that is suggestive to its native structural organization emerges from this study. |
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Keywords: | CPC C-phycocyanin PE Phycoerythrin APC Allophycocyanin Syn Synechococcus sp PCC F Fremyella PCB Phycocyanobilins S Spirulina D Donor A Acceptor PDB Protein Data Bank |
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