6bqo

Structure of a dual topology fluoride channel with monobody S8

spinqualitylabelsall models 6bqo, resolution 2.80Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 6bqo is a 3 chain structure with sequence from Bordetella pertussis Tohama I and Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.8Å Ligands: F, NA, OLC Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function CRCB_BORPE Important for reducing fluoride concentration in the cell, thus reducing its toxicity. Publication Abstract from PubMed Crystallization of dual-topology fluoride (Fluc) channels requires small, soluble crystallization chaperones known as monobodies, which act as primary crystal lattice contacts. Previous structures of Flucs have been solved in the presence of monobodies that inhibit fluoride currents in single-channel electrophysiological recordings. These structures have revealed two-fold symmetric, doubly bound arrangements, with one monobody on each side of the membrane. The combined electrophysiological and structural observations raise the possibility that chaperone binding allosterically closes the channel, altering the structure from its conducting form. To address this, we identify and solve the structure with a different monobody that only partially blocks fluoride currents. The structure of the channel-monobody complex is asymmetric, with monobody bound to one side of the channel only. The channel conformation is nearly identical on the bound and uncomplexed sides, and to all previously solved structures, providing direct structural evidence that monobody binding does not induce local structural changes. Cork-in-Bottle Occlusion of Fluoride Ion Channels by Crystallization Chaperones.,McIlwain BC, Newstead S, Stockbridge RB Structure. 2018 Feb 22. pii: S0969-2126(18)30044-3. doi:, 10.1016/j.str.2018.02.004. PMID:29526432 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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