7e0i

LHCII-2 in the state transition supercomplex PSI-LHCI-LHCII from the LhcbM1 lacking mutant of Chlamydomonas reinhardti

spinqualitylabelsall models 7e0i, resolution 3.53Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 7e0i is a 3 chain structure with sequence from Chlamydomonas reinhardtii. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: Electron Microscopy, Resolution 3.53Å Ligands: CLA, LHG, LMG, LUT, NEX, TPO, XAT Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function Q93WL4_CHLRE The light-harvesting complex (LHC) functions as a light receptor, it captures and delivers excitation energy to photosystems with which it is closely associated.[RuleBase:RU363080] Publication Abstract from PubMed In green algae and plants, state transitions serve as a short-term light-acclimation process in the regulation of the light-harvesting capacity of photosystems I and II (PSI and PSII, respectively). During the process, a portion of light-harvesting complex II (LHCII) is phosphorylated, dissociated from PSII and binds with PSI to form the supercomplex PSI-LHCI-LHCII. Here, we report high-resolution structures of PSI-LHCI-LHCII from Chlamydomonas reinhardtii, revealing the mechanism of assembly between the PSI-LHCI complex and two phosphorylated LHCII trimers containing all four types of LhcbM protein. Two specific LhcbM isoforms, namely LhcbM1 and LhcbM5, directly interact with the PSI core through their phosphorylated amino terminal regions. Furthermore, biochemical and functional studies on mutant strains lacking either LhcbM1 or LhcbM5 indicate that only LhcbM5 is indispensable in supercomplex formation. The results unravel the specific interactions and potential excitation energy transfer routes between green algal PSI and two phosphorylated LHCIIs. Structural basis of LhcbM5-mediated state transitions in green algae.,Pan X, Tokutsu R, Li A, Takizawa K, Song C, Murata K, Yamasaki T, Liu Z, Minagawa J, Li M Nat Plants. 2021 Aug;7(8):1119-1131. doi: 10.1038/s41477-021-00960-8. Epub 2021 , Jul 8. PMID:34239095 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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