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- Title
Three-dimensional structure of cyanobacterial photosystem I at 2.5 A resolution.
- Authors
Jordan, P; Fromme, P; Witt, H T; Klukas, O; Saenger, W; Krauss, N
- Abstract
Life on Earth depends on photosynthesis, the conversion of light energy from the Sun to chemical energy. In plants, green algae and cyanobacteria, this process is driven by the cooperation of two large protein-cofactor complexes, photosystems I and II, which are located in the thylakoid photosynthetic membranes. The crystal structure of photosystem I from the thermophilic cyanobacterium Synechococcus elongatus described here provides a picture at atomic detail of 12 protein subunits and 127 cofactors comprising 96 chlorophylls, 2 phylloquinones, 3 Fe4S4 clusters, 22 carotenoids, 4 lipids, a putative Ca2+ ion and 201 water molecules. The structural information on the proteins and cofactors and their interactions provides a basis for understanding how the high efficiency of photosystem I in light capturing and electron transfer is achieved.
- Publication
Nature, 2001, Vol 411, Issue 6840, p909
- ISSN
0028-0836
- Publication type
Journal Article
- DOI
10.1038/35082000