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. 2019 Nov 14;9:16791. doi: 10.1038/s41598-019-53069-6

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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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Genome organization of cysA2 and related genes, structural conservation and sulfurtransferase motifs in the correspondent proteins. (a) Genome organization of cysA2 and the three other putative sulfurtransferases. cysA2 and cysA3 genes are identical and organized in two different operons that also have genes involved in the molybdenum metabolism. Gene codes and the name of the proteins are shown in agreement with the Tuberculist site. The molecular weight of the proteins is shown in kDa. (b) Structural superimposition of the three-dimensional structures of M. tuberculosis CysA2 (PDB code 3HIW, yellow), CysA3 (PDB code 3AAY, red) and SseA (PDB code 3HZU, blue). (c) Amino acid sequence alignment of CysA2 and the three related proteins identified in M. tuberculosis detaching the motifs that characterize the sulfurtransferases TSTs and MSTs.