7cgo

Cryo-EM structure of the flagellar motor-hook complex from Salmonella

spinqualitylabelsall models 7cgo, resolution 3.90Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 7cgo is a 94 chain structure with sequence from Salmonella enterica subsp. enterica serovar Typhimurium str. LT2. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: Electron Microscopy, Resolution 3.9Å Ligands: P1L Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function FLGG_SALTY Publication Abstract from PubMed The bacterial flagellar motor is a supramolecular protein machine that drives rotation of the flagellum for motility, which is essential for bacterial survival in different environments and a key determinant of pathogenicity. The detailed structure of the flagellar motor remains unknown. Here we present an atomic-resolution cryoelectron microscopy (cryo-EM) structure of the bacterial flagellar motor complexed with the hook, consisting of 175 subunits with a molecular mass of approximately 6.3 MDa. The structure reveals that 10 peptides protruding from the MS ring with the FlgB and FliE subunits mediate torque transmission from the MS ring to the rod and overcome the symmetry mismatch between the rotational and helical structures in the motor. The LP ring contacts the distal rod and applies electrostatic forces to support its rotation and torque transmission to the hook. This work provides detailed molecular insights into the structure, assembly, and torque transmission mechanisms of the flagellar motor. Structural basis of assembly and torque transmission of the bacterial flagellar motor.,Tan J, Zhang X, Wang X, Xu C, Chang S, Wu H, Wang T, Liang H, Gao H, Zhou Y, Zhu Y Cell. 2021 Apr 14. pii: S0092-8674(21)00430-X. doi: 10.1016/j.cell.2021.03.057. PMID:33882274 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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