Figure 7.

Transmembrane torque transmission. (A) (i) Conserved FliG_N/FliF_C-tail coevolved contacts mapped onto the T. maritima crystal structure (PDB: 5tdy [125]). (ii) Predicted FliF_C^per architecture obtained by residue coevolution. Red lines denote coevolved residue pairs as in Figure 5D (modified from [112]). (B) The 3D model of the S. enterica hook–basal body complex. The basal body part of the structure was from a 3D reconstruction as published [50]. The hook with attached FliD cap structure was done by single-particle methods using the entire hook with the cap as the single-particle (Dennis Thomas, unpublished results (with permission)). (C) The 3D map of the S. enterica FliF_C torque transmitter module (EMD-10143, 3.1-angstrom resolution (modified from [127])). The en-face view resolves 33-subunits.