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. 2020 May 15;11:797. doi: 10.3389/fmicb.2020.00797

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Copyright © 2020 Oppegaard, Skrede, Mylvaganam and Kittang.

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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Genetic composition of the mobile genetic element IMEsp2907 in three BHS. Mauve was used for the sequence alignment of the mobile genetic element. Panel (A) depicts a comparison of IMEsp2907 detected in the invasive BHS isolates iGAS302 (S. pyogenes), iGBS485 (S. agalactiae), and iSDSE357 (S. dysgalactiae). The integrative mobilizable element displayed a conserved genetic architecture and highly similar nucleotide sequences in these three species. Genes involved in mobilization and integration accounted for the majority of the discrepancies. The gene immediately downstream from erm(A) is annotated by RAST as a spectinomycin resistance gene based on sequence similarities, but has not been experimentally verified. Panel (B) displays an alignment of Tn3872 detected in two GBS isolates and one SD isolate. The ICE Tn3872 is composed of an erm(B) module (highlighted in a pink box) integrated into a Tn916 element.