Role of diffusion in excitation energy transfer: a time-resolved study

2000 ◽  
Vol 90 (1-2) ◽  
pp. 17-25 ◽  
Author(s):  
H.C. Joshi ◽  
H. Mishra ◽  
H.B. Tripathi ◽  
T.C. Pant
Keyword(s):  
Energy Transfer ◽  
Excitation Energy ◽  
Excitation Energy Transfer ◽  
Time Resolved

scholarly journals Structure of a cyanobacterial photosystem I surrounded by octadecameric IsiA antenna proteins

2020 ◽  
Vol 3 (1) ◽  
Author(s):  
Fusamichi Akita ◽  
Ryo Nagao ◽  
Koji Kato ◽  
Yoshiki Nakajima ◽  
Makio Yokono ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Excitation Energy ◽  
Photosystem I ◽  
Fluorescence Spectra ◽  
Protein A ◽  
Excitation Energy Transfer ◽  
Electron Microscopic ◽  
Time Resolved ◽  
Closed Ring ◽  
Membrane Spanning

AbstractIron-stress induced protein A (IsiA) is a chlorophyll-binding membrane-spanning protein in photosynthetic prokaryote cyanobacteria, and is associated with photosystem I (PSI) trimer cores, but its structural and functional significance in light harvesting remains unclear. Here we report a 2.7-Å resolution cryo-electron microscopic structure of a supercomplex between PSI core trimer and IsiA from a thermophilic cyanobacterium Thermosynechococcus vulcanus. The structure showed that 18 IsiA subunits form a closed ring surrounding a PSI trimer core. Detailed arrangement of pigments within the supercomplex, as well as molecular interactions between PSI and IsiA and among IsiAs, were resolved. Time-resolved fluorescence spectra of the PSI–IsiA supercomplex showed clear excitation-energy transfer from IsiA to PSI, strongly indicating that IsiA functions as an energy donor, but not an energy quencher, in the supercomplex. These structural and spectroscopic findings provide important insights into the excitation-energy-transfer and subunit assembly mechanisms in the PSI–IsiA supercomplex.

Excitation energy transfer in a cationic water-soluble conjugated co-polymer studied by time resolved anisotropy and fluorescence dynamics

2006 ◽  
Vol 421 (1-3) ◽  
pp. 205-209 ◽  
Author(s):  
D. Anestopoulos ◽  
M. Fakis ◽  
P. Persephonis ◽  
V. Giannetas ◽  
J. Mikroyannidis
Keyword(s):  
Energy Transfer ◽  
Excitation Energy ◽  
Excitation Energy Transfer ◽  
Water Soluble ◽  
Time Resolved

Time-Resolved Investigation of Excitation Energy Transfer in Carbon Nanotube–Porphyrin Compounds

2011 ◽  
Vol 115 (47) ◽  
pp. 23283-23292 ◽  
Author(s):  
Damien Garrot ◽  
Benjamin Langlois ◽  
Cyrielle Roquelet ◽  
Thierry Michel ◽  
Philippe Roussignol ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Carbon Nanotube ◽  
Excitation Energy ◽  
Excitation Energy Transfer ◽  
Time Resolved
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