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. 2019 Oct 10;9:14607. doi: 10.1038/s41598-019-51174-0

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© The Author(s) 2019

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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Superposition of ErmC’ (grey) in complex with SAM (orange) (PDB ID 1QAO)²¹ onto ErmE (teal). (a) Overall structures. (b) Residues interacting with SAM at the SAM binding site. Main chain carbonyl oxygens are only shown if involved in SAM binding. Hydrogen bonds are shown by dashed lines. (c) Comparison of interdomain region including the α5-α6 and α9-α10 loops and the additional η4 in ErmE. (d) Residues involved in interdomain interactions in ErmE.