The Genome of the Marine Rotifer Brachionus manjavacas: Genome-Wide Identification of 310 G Protein-Coupled Receptor (GPCR) Genes

Kim, Duck-Hyun; Byeon, Eunjin; Kim, Min‐Sub; Lee, Young Hwan; Park, Jun Chul; Hagiwara, Atsushi; Lee, Jae-Seong

doi:10.1007/s10126-022-10102-6

Cited by 6 publications

(1 citation statement)

References 94 publications

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“…Available genomes for Monogononta (Kim et al 2018;Blommaert et al 2019;Park et al 2020;Byeon et al 2021;Kim et al 2022), Bdelloidea (Nowell et al 2018;Simion et al 2021), S. nebaliae (Mauer et al 2021) and Acanthocephala (Mauer et al 2020) and the genomes of outgroup species Capitella teleta and Saccoglossus kowalevskii were downloaded from Genbank. gDNA reads and nuclear draft genome of N. agilis can be retrieved from Genbank under BioProject accession PRJNA1126620 and BioSample accession SAMN41948513.…”

Section: Genomesmentioning

confidence: 99%

Substantial hierarchical reductions of genetic and morphological traits in the evolution of rotiferan parasites

Herlyn,

Hembrom,

Tosar

et al. 2024

Preprint

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FigureGraphical abstractDuring the last 800 million years of evolution animals radiated into a vast range of diversity of species and disparity of forms and lifestyles. The process involved a near hierarchical increase in complexity from life forms with few cell types to organisms with many hundreds of cell-types. However, neither genome size nor number of protein-coding genes can explain these differences and their biological basis remains elusive. Yet, recent studies have suggested that the evolution of complexity is closely linked to the acquisition of a class of protein coding gene-regulators called microRNAs.In a regressive approach, to investigate the association between loss of organismal complexity and microRNAs, we here studied Syndermata, an invertebrate group including free-living rotifers (Monogononta, Bdelloidea), the epibiotic Seisonidea and the endoparasitic Acanthocephala. Genomic, transcriptomic and morphological characterization and comparisons across 25 syndermatan species revealed a strong correlation between loss of microRNAs, loss of protein-coding genes and decreasing morphological complexity. The near hierarchical loss extends to ∼85% loss of microRNAs and a ∼50% loss of BUSCO genes in the endoparasitic Acanthocephala, the most reduced group we studied.Together, the loss of ∼400 protein-coding genes and ∼10 metazoan core gene losses went along with one microRNA family loss. Furthermore, the loss of ∼4 microRNA families or ∼34 metazoan core genes associated with one lost morphological feature. These are the first quantitative insights into the regulatory impact of microRNAs on organismic complexity as a predictable consequence in regressive evolution of parasites.

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