Study on the energy transfer processes in phycobilisomes from blue-green algae by the use of stochastic simulation approach

摘要

A more natural model is used for simulating the energy transfer processes in phycobilisomes from cyanobacteria. In the model, the crystal structure data of C-phycocyanins are applied and the linker polypeptides are taken into account to calculate F?rster transfer rates between neighboring disks. Applying computer simulation, the single-step dynamic nature and the step-by-step paths for excitation transfer are investigated. The time constant and mean number of transfer events through a single-step provide a quantitative description of not only the dynamic property of each step but also the dominant pathways in phycobilisomes of blue-green algae. It is estimated that about 90% of the excitation energy is transferred to the core through β84 chromophores. The simulation also shows that the excitation energy is transferred in a natural phycobilisome most likely in partially reversible manner.