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Time-Resolved Fluorescence Spectroscopy Study of Energy Transfer Dynamics in Phycobilisomes of the Thermophilic Cyanobacterium Thermosynechococcus vulcanus NIES 2134

Phycobilisomes (PBSs) are the largest light-harvesting complexes in cyanobacteria and red algae. To understand the energy transfer dynamics in PBSs, the cyanobacterium Thermosynechococcus vulcanus NIES2134 (T. 2134), with a phycocyanin (PC) trimer PC612 linking the rod and core, was selected. The en...

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Published in:Spectroscopy 2022-04, Vol.37 (4), p.28-35
Main Authors: Xie, Mingyuan, Zhen, Zhanghe, Qin, Song, Li, Wenjun, Zhao, Fuli
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description Phycobilisomes (PBSs) are the largest light-harvesting complexes in cyanobacteria and red algae. To understand the energy transfer dynamics in PBSs, the cyanobacterium Thermosynechococcus vulcanus NIES2134 (T. 2134), with a phycocyanin (PC) trimer PC612 linking the rod and core, was selected. The energy transfer dynamics were studied via time-resolved fluorescence spectroscopy with sub-picosecond resolution. The energy transfer pathways and transfer rates were uncovered by deconvolution of the fluorescence decay curve. A fast time-component of 10 ps from PC612 trimer to the core and a slow time-component of 80 ps from rods to the core were recognized in the energy transfer. The faster energy transfer rate of 10 ps enables PC612 trimer to modulate the energy transfer dynamics between rods and core. The findings help us understand the structure-induced energy transfer mechanisms in PBSs.
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1939-1900
language eng
recordid cdi_proquest_reports_2818985680
source Alma/SFX Local Collection
subjects Algae
Analytical methods
Antennas
Cyanobacteria
Dynamic structural analysis
Dynamics
Efficiency
Energy
Energy transfer
Fluorescence
Fluorescence spectroscopy
Microcomputers
Personal computers
Photosynthesis
Phycobilisomes
Phycocyanin
Rods
Spectroscopic analysis
Spectroscopy
Spectrum analysis
Thermosynechococcus vulcanus
Trimers
title Time-Resolved Fluorescence Spectroscopy Study of Energy Transfer Dynamics in Phycobilisomes of the Thermophilic Cyanobacterium Thermosynechococcus vulcanus NIES 2134
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