7efv

Crystal structure of octameric state of C-phycocyanin from Thermoleptolyngbya sp. O-77

spinqualitylabelsall models 7efv, resolution 2.77Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 7efv is a 4 chain structure with sequence from Leptolyngbya sp. O-77. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.77Å Ligands: CYC, MEN Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed C-phycocyanin (CPC), a blue pigment protein, is an indispensable component of giant phycobilisomes, which are light-harvesting antenna complexes in cyanobacteria that transfer energy efficiently to photosystems I and II. X-ray crystallographic and electron microscopy (EM) analyses have revealed the structure of CPC to be a closed toroidal hexamer by assembling two trimers. In this study, the structural characterization of non-conventional octameric CPC is reported for the first time. Analyses of the crystal and cryogenic EM structures of the native CPC from filamentous thermophilic cyanobacterium Thermoleptolyngbya sp. O-77 unexpectedly illustrated the coexistence of conventional hexamer and novel octamer. In addition, an unusual dimeric state, observed via analytical ultracentrifugation, was postulated to be a key intermediate structure in the assemble of the previously unobserved octamer. These observations provide new insights into the assembly processes of CPCs and the mechanism of energy transfer in the light-harvesting complexes. Non-conventional octameric structure of C-phycocyanin.,Minato T, Teramoto T, Adachi N, Hung NK, Yamada K, Kawasaki M, Akutsu M, Moriya T, Senda T, Ogo S, Kakuta Y, Yoon KS Commun Biol. 2021 Oct 29;4(1):1238. doi: 10.1038/s42003-021-02767-x. PMID:34716405 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Phycocyanin

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