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. 2018 Apr 16;8:6013. doi: 10.1038/s41598-018-24507-8

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© The Author(s) 2018

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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Multiple sequence alignment of amino acid sequences of AiiK (WP_029500404) and other representative AHL lactonases. The amino acid sequences were retrieved from NCBI or UniProt database. Sequence alignment was assesses by using of the MEGA 4.0 and GeneDoc. AiiK homologue from Bacillus sp. KCTC 13219 (KYG91086) and Solibacillus silvestris (BAK54000) showed the highest score and second highest score by BLAST searching in NCBI database. Other amino acid sequences of AHL lactonase are the first enzyme AiiA from Bacillus sp. strain 240B1 (AAF62398), AiiB (NP 396590) and AttM (AAD43990) from Agrobacterium fabrum str. C58, AidC from Chryseobacterium sp. strain StRB126 (BAM28988), MomL from Muricauda olearia (AIY30473), and Aii20J (AKN24544) from Tenacibaculum sp. 20J. These lactonases share a conserved domain (HXHXDH-H-D) essential for AHLs degradation.