The supramolecular architecture, function, and regulation of thylakoid membranes in red algae: an overview |
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Authors: | Hai-Nan Su Bin-Bin Xie Xi-Ying Zhang Bai-Cheng Zhou Yu-Zhong Zhang |
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Affiliation: | 1. The State Key Lab of Microbial Technology, Marine Biotechnology Research Center, Shandong University, Jinan, 250100, People’s Republic of China
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Abstract: | Red algae are a group of eukaryotic photosynthetic organisms. Phycobilisomes (PBSs), which are composed of various types of phycobiliproteins and linker polypeptides, are the main light-harvesting antennae in red algae, as in cyanobacteria. Two morphological types of PBSs, hemispherical- and hemidiscoidal-shaped, are found in different red algae species. PBSs harvest solar energy and efficiently transfer it to photosystem II (PS II) and finally to photosystem I (PS I). The PS I of red algae uses light-harvesting complex of PS I (LHC I) as a light-harvesting antennae, which is phylogenetically related to the LHC I found in higher plants. PBSs, PS II, and PS I are all distributed throughout the entire thylakoid membrane, a pattern that is different from the one found in higher plants. Photosynthesis processes, especially those of the light reactions, are carried out by the supramolecular complexes located in/on the thylakoid membranes. Here, the supramolecular architecture, function and regulation of thylakoid membranes in red algal are reviewed. |
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