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. 2021 Jun 1;12:660052. doi: 10.3389/fmicb.2021.660052

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Copyright © 2021 Castelle, Méheust, Jaffe, Seitz, Gong, Baker and Banfield.

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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Bacterial queuosine pathway in DPANN genomes and some Euryarchaeota (Methanosarcinales). (A) Phylogenetic affiliation and distribution of the identified QueA, QueH and TGT in archaea selected for this study. (B) The three last steps of the queuosine biosynthesis pathway in Bacteria. (C) Selected examples of genomic context and gene synteny around the genes QueA, QueH (DUF208) and TGT. QueA, S-adenosylmethionine:tRNA ribosyltransferase-isomerase; QueH (DUF208), epoxyqueuosine reductase; TGT, queuine tRNA-ribosyltransferase. A full gene synteny and genomic context of all the genes involved in the queuosine pathway in this study is available in Supplementary Table 5.