Journal
MARINE DRUGS
Volume 20, Issue 2, Pages -Publisher
MDPI
DOI: 10.3390/md20020130
Keywords
rotifera; pattern recognition receptors; microbe-associated molecular patterns; innate immunity; C-type lectins; C1q domain-containing proteins; galectins
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Aquatic lophotrochozoan animals, known for high biodiversity, are considered an abundant source of bioactive molecules. Lectins, proteins with exceptional carbohydrate recognition properties, are attractive targets for biotechnological research. This study provides an overview of secretory lectin-like molecules encoded by the genomes of six target rotifer species. Despite a high molecular diversity, the total number of rotifer secretory lectins is lower compared to other lophotrochozoans, and there is no evidence of lineage-specific expansion events. Rotifers, with their evolutionary divergence, widespread distribution in aquatic environments, and ease of collection and rearing in the laboratory, may be interesting targets for glycobiological studies.
Due to their high biodiversity and adaptation to a mutable and challenging environment, aquatic lophotrochozoan animals are regarded as a virtually unlimited source of bioactive molecules. Among these, lectins, i.e., proteins with remarkable carbohydrate-recognition properties involved in immunity, reproduction, self/nonself recognition and several other biological processes, are particularly attractive targets for biotechnological research. To date, lectin research in the Lophotrochozoa has been restricted to the most widespread phyla, which are the usual targets of comparative immunology studies, such as Mollusca and Annelida. Here we provide the first overview of the repertoire of the secretory lectin-like molecules encoded by the genomes of six target rotifer species: Brachionus calyciflorus, Brachionus plicatilis, Proales similis (class Monogononta), Adineta ricciae, Didymodactylos carnosus and Rotaria sordida (class Bdelloidea). Overall, while rotifer secretory lectins display a high molecular diversity and belong to nine different structural classes, their total number is significantly lower than for other groups of lophotrochozoans, with no evidence of lineage-specific expansion events. Considering the high evolutionary divergence between rotifers and the other major sister phyla, their widespread distribution in aquatic environments and the ease of their collection and rearing in laboratory conditions, these organisms may represent interesting targets for glycobiological studies, which may allow the identification of novel carbohydrate-binding proteins with peculiar biological properties.
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