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. 2016 Dec 21;6:39540. doi: 10.1038/srep39540

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Copyright © 2016, The Author(s)

This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

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MCR-1C, LptA (PDB: 4KAY), EptC (PDB: 4TN0) are shown in cartoon representation. The labeled key residues and active site metal ions are represented in ball-and-stick and sphere, respectively. (a) Overall structure of MCR-1C. The nucleophilic residue T285 and three disulfide bridges are shown as ball-and-stick. The helix locked by a disulfide bond to the central β sheet is shown in green. (b,c) Structural superimpositions (front and back view) of MCR-1C, LptA and EptC are shown in grey. The significant variable loops are highlighted in cyan (MCR-1C), green (LptA) and orange (EptC).