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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Thomas, Jean-claude Zhou, Bai-cheng Lamers, Gerda E. M. Zhang, Yu-zhong Liu, Lu-ning Aartsma, Thijs J. |
| Description | Author Affiliation: Liu LN ( State Key Lab of Microbial Technology, Marine Biotechnology Research Center, Shandong University, Jinan 250100, China.) |
| Abstract | The architecture of the entire photosynthetic membrane network determines, at the supramolecular level, the physiological roles of the photosynthetic protein complexes involved. So far, a precise picture of the native configuration of red algal thylakoids is still lacking. In this work, we investigated the supramolecular architectures of phycobilisomes (PBsomes) and native thylakoid membranes from the unicellular red alga Porphyridium cruentum using atomic force microscopy (AFM) and transmission electron microscopy. The topography of single PBsomes was characterized by AFM imaging on both isolated and membrane-combined PBsomes complexes. The native organization of thylakoid membranes presented variable arrangements of PBsomes on the membrane surface. It indicates that different light illuminations during growth allow diverse distribution of PBsomes upon the isolated photosynthetic membranes from P. cruentum, random arrangement or rather ordered arrays, to be observed. Furthermore, the distributions of PBsomes on the membrane surfaces are mostly crowded. This is the first investigation using AFM to visualize the native architecture of PBsomes and their crowding distribution on the thylakoid membrane from P. cruentum. Various distribution patterns of PBsomes under different light conditions indicate the photoadaptation of thylakoid membranes, probably promoting the energy-harvesting efficiency. These results provide important clues on the supramolecular architecture of red algal PBsomes and the diverse organizations of thylakoid membranes in vivo. |
| ISSN | 00219258 |
| e-ISSN | 1083351X |
| Journal | Journal of Biological Chemistry |
| Issue Number | 50 |
| Volume Number | 283 |
| Language | English |
| Publisher | American Society for Biochemistry and Molecular Biology (United States) |
| Publisher Date | 2008-12-12 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Photosynthesis Phycobilisomes Metabolism Rhodophyta Thylakoids Electrophoresis, Polyacrylamide Gel Microscopy, Atomic Force Microscopy, Electron, Transmission Organelles Photosynthetic Reaction Center Complex Proteins Porphyridium Spectrometry, Fluorescence Research Support, Non-U.S. Gov't Biochemistry Molecular Biology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Cell Biology Biochemistry Molecular Biology |
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