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. 2022 Jul 22;13:945411. doi: 10.3389/fmicb.2022.945411

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Copyright © 2022 Johannessen, Anthonisen, Zecic, Hegstad, Ranheim and Skaare.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Schematic presentation of the transposable element Tn7471, representing 10.7% of Tn7100. Refer to Figure 1 for location on Tn7100. Tn7471 consists of a 7,903-bp insertion in the DNA methylase gene (QEA08786) and has a 99.49% identity to a fragment of the conjugative transposon Tn6822 (MT489699) in Streptococcus pneumoniae strain 080217 (NZ_JABAHD010000004, bottom). Top; fragment of Tn6686 (MN106411) with a vertical line indicating the insertion site, 6 bp within the end of the DNA methylase gene. Tn7471 contains a truncated macrolide efflux genetic assembly (mega) element (AF274302) with orf3 (incomplete), macrolide resistance genes mef (E) and mel, and orf7 of mega. Furthermore, Tn7471 contains eight genes of the conjugative transposon Tn916 (U09422); orfs 5-10 (orf6 incomplete), and the xis-Tn and int-Tn genes associated with excision and integration in conjugative transposition. The junction between mega and Tn916 is indicated by a vertical line. A tentative 5-bp coupling sequence is indicated on the right flank of Tn7471 (underlined).