Figure 3.

Sequence alignment of the PorE OmpA_C-like domain with other representative OmpA family proteins. Secondary structure elements and numeration from the OmpA_C-like domain of PorE structure are displayed above the alignment. Strictly conserved residues are in red blocks; the three residues of the PorE OmpA_C-like domain whose side chains are involved in hydrogen bonds with the peptidoglycan fragment are indicated by an asterisk. 4G4V: peptidoglycan-associated lipoprotein (PAL) from Acinetobacter baumannii; 3TD5, OmpA family protein from Acinetobacter baumannii; 3WPW, flagellar stator coupled protein PomB from Vibrio alginolyticus. Amino acid sequences were aligned using T-Coffee (version 11.00.d625267, http://www.tcoffee.org)⁵⁰, and the figure was prepared using ESPript (version 3.0, http://espript.ibcp.fr/)⁵¹.