Transposable elements (TEs) have the ability to move and amplify inside the host genome, making them a pivotal source of genome plasticity. Presently, only 4 TE clades (all classified as Class I retrotransposons) have been identified in trypanosomatids. We predicted repeat content and manually curated TEs across the genomes of 57 trypanosomatids, shedding light on their proportions, diversity and dynamics. Our analysis yielded 214 TE consensus sequence models across the dataset, with abundance ranging from 0.1% to 7.2%. We found evidence of recent transposon activity in most species, with notable bursts in the Vickermania, Lafontella, Porcisia and Angomonas spp., along with Leishmania (Mundinia) chancei, L. (M.) orientalis and L. (M.) procaviensis. We confirmed that the 4 TE clades have colonized virtually all lineages of trypanosomatids, potentially playing a role in shaping their genome architecture. The effort of this work culminated in the establishment of the Trypanosomatid TE Database 1.0, a resource designed to standardize the TE annotation process that can serve as a foundation for future studies on trypanosomatid TEs.

Departamento de Biologia Animal Instituto de Biologia Universidade Estadual de Campinas Campinas Brazil

Department of Evolution Ecology and Behaviour University of Liverpool Liverpool UK

Department of Parasitology Institute for Biomedical Sciences University of Sao Paulo Sao Paulo Brazil

Life Science Research Centre Faculty of Science University of Ostrava Ostrava Czech Republic

Vice Presidency of Production and Innovation in Health Rio de Janeiro Brazil

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