STUDY ON THE ENERGY-TRANSFER PROCESSES IN PHYCOBILISOMES FROM BLUE-GREEN-ALGAE BY THE USE OF STOCHASTIC SIMULATION APPROACH

Citation
Jq. Zhao et al., STUDY ON THE ENERGY-TRANSFER PROCESSES IN PHYCOBILISOMES FROM BLUE-GREEN-ALGAE BY THE USE OF STOCHASTIC SIMULATION APPROACH, Biochimica et biophysica acta. Bioenergetics, 1229(1), 1995, pp. 39-48
Citations number
23
Categorie Soggetti
Biology,Biophysics
ISSN journal
00052728
Volume
1229
Issue
1
Year of publication
1995
Pages
39 - 48
Database
ISI
SICI code
0005-2728(1995)1229:1<39:SOTEPI>2.0.ZU;2-S
Abstract
A more natural model is used for simulating the energy transfer proces ses in phycobilisomes from cyanobacteria. In the model, the crystal st ructure data of C-phycocyanins are applied and the linker polypeptides are taken into account to calculate Forster transfer rates between ne ighboring disks. Applying computer simulation, the single-step dynamic nature and the step-by-step paths for excitation transfer are investi gated. 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 phycobilisome s of blue-green algae. It is estimated that about 90% of the excitatio n energy is transferred to the core through beta(84) chromophores. The simulation also shows that the excitation energy is transferred in a natural phycobilisome most likely in partially reversible manner.