1jb0 | pdb_00001jb0

Crystal Structure of Photosystem I: a Photosynthetic Reaction Center and Core Antenna System from Cyanobacteria

spinqualitylabelsall models 1jb0, resolution 2.50Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1jb0 is a 10 chain structure with sequence from Synechococcus elongatus. The October 2001 RCSB PDB Molecule of the Month feature on Photosystem I by David S. Goodsell is 10.2210/rcsb_pdb/mom_2001_10. The June 2005 RCSB PDB Molecule of the Month feature on Carotenoid Oxygenase by David S. Goodsell is 10.2210/rcsb_pdb/mom_2005_6. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.5Å Ligands: BCR, CA, CLA, LHG, LMG, PQN Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function PSAA_THEVB PsaA and PsaB bind P700, the primary electron donor of photosystem I (PSI), as well as the electron acceptors A0, A1 and FX. PSI is a plastocyanin/cytochrome c6-ferredoxin oxidoreductase, converting photonic excitation into a charge separation, which transfers an electron from the donor P700 chlorophyll pair to the spectroscopically characterized acceptors A0, A1, FX, FA and FB in turn. Oxidized P700 is reduced on the lumenal side of the thylakoid membrane by plastocyanin or cytochrome c6. Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed 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. Three-dimensional structure of cyanobacterial photosystem I at 2.5 A resolution.,Jordan P, Fromme P, Witt HT, Klukas O, Saenger W, Krauss N Nature. 2001 Jun 21;411(6840):909-17. PMID:11418848 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Photosystem I Photosystem I 3D structures

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