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. 2017 Apr 21;7:1058. doi: 10.1038/s41598-017-01235-z

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© The Author(s) 2017

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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Structure of MtbICL. (A) Ribbon structure of the homotetrameric MtbICL, with each subunit shown in different color (PDB ID: 1F8I). (B) Chain A of MtbICL tetramer showing the position of Phe345 in red and active site signature sequence (¹⁸⁹KKCGH¹⁹³) in green. (C) Active site cavity of the chain A of MtbICL. The active site residues and Phe345 are marked and labeled. The distances are shown with dotted lines. The structures were visualized with UCSF Chimera.