6m32

Cryo-EM structure of FMO-RC complex from green sulfur bacteria

spinqualitylabelsall models 6m32, resolution 2.70Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 6m32 is a 7 chain structure with sequence from Chlorobaculum tepidum TLS. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: Electron Microscopy, Resolution 2.7Å Ligands: CA, F26, F39, LHG, LMG Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function BCPA_CHLTE Intermediary in the transfer of excitation energy from the chlorophyll to the reaction centers. Publication Abstract from PubMed The photosynthetic apparatus of green sulfur bacteria (GSB) contains a peripheral antenna chlorosome, light-harvesting Fenna-Matthews-Olson proteins (FMO), and a reaction center (GsbRC). We used cryo-electron microscopy to determine a 2.7-angstrom structure of the FMO-GsbRC supercomplex from Chlorobaculum tepidum The GsbRC binds considerably fewer (bacterio)chlorophylls [(B)Chls] than other known type I RCs do, and the organization of (B)Chls is similar to that in photosystem II. Two BChl layers in GsbRC are not connected by Chls, as seen in other RCs, but associate with two carotenoid derivatives. Relatively long distances of 22 to 33 angstroms were observed between BChls of FMO and GsbRC, consistent with the inefficient energy transfer between these entities. The structure contains common features of both type I and type II RCs and provides insight into the evolution of photosynthetic RCs. Architecture of the photosynthetic complex from a green sulfur bacterium.,Chen JH, Wu H, Xu C, Liu XC, Huang Z, Chang S, Wang W, Han G, Kuang T, Shen JR, Zhang X Science. 2020 Nov 20;370(6519):eabb6350. doi: 10.1126/science.abb6350. PMID:33214250 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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