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. Author manuscript; available in PMC: 2019 Nov 1.
Published in final edited form as: Mol Microbiol. 2018 Oct 15;110(4):634–647. doi: 10.1111/mmi.14121

Figure 5. Comparative analysis of the collar structures from different flagellar mutants.

Figure 5.

(A, F) A central section of the averaged ΔflbB motor structure and corresponding isosurface rendering. (B, G) A central section of the averaged Δbb0236 motor structure and corresponding isosurface rendering. (C, H) A central section of one class average of the ΔfliL motor and corresponding isosurface rendering. (D, I) A central section of another class average of the ΔfliL motor and corresponding isosurface rendering. Compared with the WT motor (E, J), the motor structures from different mutants are distinct from each other. The collar is a multiprotein complex that assembles sequentially and FlbB forms the base of the collar. Other collar proteins are predicted to assemble on top of each other as illustrated. The identity of the red spike structure in (G) is currently unknown but it could be FlbB because this density is missing in the ΔflbB mutant. The question marks indicate that the identity of these proteins is yet to be experimentally confirmed.