7dkz | pdb_00007dkz

Structure of plant photosystem I-light harvesting complex I supercomplex

spinqualitylabelsall models 7dkz, resolution 2.39Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 7dkz is a 10 chain structure with sequence from Pisum sativum. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.393Å Ligands: BCR, CHL, CLA, DGD, HTG, LHG, LMG, LMT, LUT, PQN, SF4, XAT Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function Q41038_PEA Publication Abstract from PubMed Photosystem I (PSI) is one of the two photosystems in photosynthesis, and performs a series of electron transfer reactions leading to the reduction of ferredoxin. In higher plants, PSI is surrounded by four light-harvesting complex I (LHCI) subunits, which harvest and transfer energy efficiently to the PSI core. The crystal structure of PSI-LHCI supercomplex has been analyzed up to 2.6 A resolution, providing much information on the arrangement of proteins and cofactors in this complicated supercomplex. Here we have optimized crystallization conditions, and analyzed the crystal structure of PSI-LHCI at 2.4 A resolution. Our structure showed some shift of the LHCI, especially the Lhca4 subunit, away from the PSI core, suggesting the indirect connection and inefficiency of energy transfer from this Lhca subunit to the PSI core. We identified five new lipids in the structure, most of them are located in the gap region between the Lhca subunits and the PSI core. These lipid molecules may play important roles in binding of the Lhca subunits to the core, as well as in the assembly of the supercomplex. The present results thus provide novel information for the elucidation of the mechanisms for the light-energy harvesting, transfer and assembly of this supercomplex. Structure of plant photosystem I-light harvesting complex I supercomplex at 2.4 A resolution.,Wang J, Yu LJ, Wang W, Yan Q, Kuang T, Qin X, Shen JR J Integr Plant Biol. 2021 Jul;63(7):1367-1381. doi: 10.1111/jipb.13095. Epub 2021 , Jun 1. PMID:33788400 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Photosystem I 3D structures

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