Journal
BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS
Volume 1827, Issue 10, Pages 1226-1234Publisher
ELSEVIER
DOI: 10.1016/j.bbabio.2013.07.003
Keywords
Triplet state; FCP; Carotenoid; EPR; ODMR; Fucoxanthin
Categories
Funding
- Italian Ministry for University and Research (MURST) [2010FM738P_004]
- Deutsche Forschungsgemeinschaft DFG [Bu812/4-1, Bu812/4-2, 8-1]
Ask authors/readers for more resources
Although the major light harvesting complexes of diatoms, called FCPs (fucoxanthin chlorophyll a/c binding proteins), are related to the cab proteins of higher plants, the structures of these light harvesting protein complexes are much less characterized. Here, a structural/functional model for the core of FCP, based on the sequence homology with LHCII, in which two fucoxanthins replace the central luteins and act as quenchers of the Chl a triplet states, is proposed. Combining the information obtained by time-resolved EPR spectroscopy on the triplet states populated under illumination, with quantum mechanical calculations, we discuss the chlorophyll triplet quenching in terms of the geometry of the chlorophyll-carotenoid pairs participating to the process. The results show that local structural rearrangements occur in FCP, with respect to LHCII, in the photoprotective site. (C) 2013 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available