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. 2018 May 4;9:1806. doi: 10.1038/s41467-018-04139-2

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© The Author(s) 2018

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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Fig. 4 — The transmembrane pore is composed of YaxA and YaxB foot domains. a Details of a transmembrane segment of the pore. The YaxAB pore model (YaxA: blue, YaxB: pink) was submitted to the PPM server to delineate the buried hydrophobic membrane surface. Shown are foot domains from one cis-dimer, as well as the neighboring protomers (transparent ribbons). Membrane exposed residues are colored in gold. The golden spheres demarcate the calculated boundaries of the apolar surface. b Hydrophobic surface rendering of the YaxAB model. Gold coloring indicates high hydrophobicity. The golden rectangle delineates the approximate membrane boundaries. c Charge distribution of the pore lumen. The surface is rendered by the qualitative electrostatic representation implemented in PyMOL (Schrödinger, LLC)