6jlm | pdb_00006jlm

XFEL structure of cyanobacterial photosystem II (dark state, dataset2)

spinqualitylabelsall models 6jlm, resolution 2.35Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 6jlm is a 20 chain structure with sequence from Thermostichus vulcanus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.35Å Ligands: BCR, BCT, CA, CL, CLA, DGD, FE2, FME, GOL, HEM, HTG, LHG, LMG, LMT, MG, OEX, PHO, PL9, SQD, UNL Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function PSBC_THEVL This protein binds multiple antenna chlorophylls and is part of the core of photosystem II (PSII). PSII is a light-driven water plastoquinone oxidoreductase, using light energy to abstract electrons from H(2)O, generating a proton gradient subsequently used for ATP formation. Publication Abstract from PubMed Photosynthetic water oxidation is catalyzed by the Mn4CaO5 cluster of photosystem II (PSII) with linear progression through five S-state intermediates (S0 to S4). To reveal the mechanism of water oxidation, we analyzed structures of PSII in the S1, S2, and S3 states by x-ray free-electron laser serial crystallography. No insertion of water was found in S2, but flipping of D1 Glu(189) upon transition to S3 leads to the opening of a water channel and provides a space for incorporation of an additional oxygen ligand, resulting in an open cubane Mn4CaO6 cluster with an oxyl/oxo bridge. Structural changes of PSII between the different S states reveal cooperative action of substrate water access, proton release, and dioxygen formation in photosynthetic water oxidation. An oxyl/oxo mechanism for oxygen-oxygen coupling in PSII revealed by an x-ray free-electron laser.,Suga M, Akita F, Yamashita K, Nakajima Y, Ueno G, Li H, Yamane T, Hirata K, Umena Y, Yonekura S, Yu LJ, Murakami H, Nomura T, Kimura T, Kubo M, Baba S, Kumasaka T, Tono K, Yabashi M, Isobe H, Yamaguchi K, Yamamoto M, Ago H, Shen JR Science. 2019 Oct 18;366(6463):334-338. doi: 10.1126/science.aax6998. Epub 2019, Oct 17. PMID:31624207 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Photosystem II 3D structures

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