Genomic evolution of the class Acidithiobacillia: deep-branching Proteobacteria living in extreme acidic conditions

Ana Moya-Beltrán, Simón Beard, Camila Rojas-Villalobos, Francisco Issotta, Yasna Gallardo, Ricardo Ulloa, Alejandra Giaveno, Mauro Degli Esposti, D. Barrie Johnson, Raquel Quatrini

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    31 Citations (Scopus)
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    Members of the genus Acidithiobacillus, now ranked within the class Acidithiobacillia, are model bacteria for the study of chemolithotrophic energy conversion under extreme conditions. Knowledge of the genomic and taxonomic diversity of Acidithiobacillia is still limited. Here, we present a systematic analysis of nearly 100 genomes from the class sampled from a wide range of habitats. Some of these genomes are new and others have been reclassified on the basis of advanced genomic analysis, thus defining 19 Acidithiobacillia lineages ranking at different taxonomic levels. This work provides the most comprehensive classification and pangenomic analysis of this deep-branching class of Proteobacteria to date. The phylogenomic framework obtained illuminates not only the evolutionary past of this lineage, but also the molecular evolution of relevant aerobic respiratory proteins, namely the cytochrome bo3 ubiquinol oxidases.
    Original languageEnglish
    Pages (from-to)3221-3238
    Number of pages18
    JournalISME Journal
    Issue number11
    Early online date18 May 2021
    Publication statusPublished - Nov 2021

    Bibliographical note

    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


    Funding Information: Acknowledgements This work was supported the Agencia Nacional de Investigación y Desarrollo under Grants FONDECYT 1181251 (R.Q.), Programa de Apoyo a Centros con Financiamiento Basal AFB170004 (R.Q.), CONICYT-PFCHA/Doctorado Nacional/ 20171049 (A.M.B.), CONICYT-PFCHA/Doctorado Nacional/ 21160871 (F.I.), the ANID—Millennium Science Initiative Program— NCN17_093, granted by the Ministry of Economy, Development and Tourism from Chile (R.Q.), and Fundación Ciencia and Vida Hinge PostDoc Program (S.B.).

    ASJC Scopus subject areas

    • Microbiology
    • Ecology, Evolution, Behavior and Systematics


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