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. 2020 Apr 30;10:7384. doi: 10.1038/s41598-020-64115-z

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© The Author(s) 2020

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Overall structure of the PorE OmpA_C-like domain in complex with a peptidoglycan fragment. The PorE OmpA_C-like domain is shown as a ribbon diagram with red α-helices and blue β-sheets; the N- and C-termini are labelled. The N-terminal residues corresponding to the end of the His₆ tag and the TEV cleavage site encoded in the expression vector are colored in black. The peptidoglycan fragment (_L-Ala-γ-_D-Glu-meso-DAP-_D-Ala) is displayed in yellow stick format; its omit difference electron density map (blue) is contoured at 3σ. The figure was prepared using PyMOL (version 1.20, https://pymol.org).