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. 2017 Jun 14;7:3461. doi: 10.1038/s41598-017-03561-8

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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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Conserved sequence alignment of EstPS1. The structures are denoted as follows: filled triangle, the catalytic site (Ser³⁸, Asp³⁰⁵, and His³⁰⁸); empty circle, the putative oxyanion hole (Ser³⁸-Gly¹¹⁰-Asn¹⁶⁶). The reserved amino acid motif GDSL is boxed by the red line. The signal peptide and linker are also boxed. The consensus amino acid residues of the autotransporter domain are shown in underscore characters.