FIG 7.

X-ray crystal structure of the FimV C-terminal domain. The X-ray crystal structure of SeMet-FimV TPR3 (residues 862 to 919) was solved to 2.05 Å (PDB 4MAL). (A) Chain A is shown, with identified conserved residues shown as sticks. Conserved charged residues are labeled directly. The two α-helices making up the TPR and the capping helix have been labeled as α1, α2, and α3. (B) Surface mesh representation of 4MAL chain A from the same view as panel A. Conserved charged residues are shown as white patches. (C) Residue R881 was observed to occupy two different states. Two-thirds of the time, R881 was in close proximity to E910, likely forming a salt bridge between α1 and α3.