Fig. 2: Structure of the native cap complex and its interaction with the filament. | Nature Microbiology

Fig. 2: Structure of the native cap complex and its interaction with the filament.

From: The structure of the complete extracellular bacterial flagellum reveals the mechanism of flagellin incorporation

Fig. 2: Structure of the native cap complex and its interaction with the filament.

a, Cross-section of the FliD cap at the distal end of the filament and the dimension of the cavity. (i) Cross-section at D1 helices at the widest part of the cavity. (ii) Cross-section at D0 helices. (iii) Cross-section at D0-C helices at the bottom of the cavity. (iv) Cross-section of the FliC filament below the FliD cap. b, Arrangement of FliD and FliC in the cap–filament complex. (i) Symmetry array of FliC in the filament and FliD position relative to FliC. (ii) Arrangement of subunits shown as the atomic model (PDB: 9GNZ). (iii) Schematic representation of FliC symmetry and relative positions of FliD and FliC. c, Overall atomic structure of the FliD cap and structural polymorphism among FliD subunits.

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