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Nematode-derived drosomycin-type antifungal peptides provide evidence for plant-to-ecdysozoan horizontal transfer of a disease resistance gene

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  • Shunyi Zhu

    (Group of Animal Innate Immunity, State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences)

  • Bin Gao

    (Group of Animal Innate Immunity, State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences)

Abstract

Drosomycin-type antifungal peptides (DTAFPs) are key innate immunity components of Drosophila and plants and confer resistance to fungal infection. Here we report the discovery of a multigene family of DTAFPs, comprising of 15 members (termed cremycin-1 to crymycin-15), in the fruit nematode Caenorhabditis remanei. Cremycins share highly similar amino-acid sequences and identical precursor organization to drosomycins. Of the 15 cremycin genes, 10 are found to be transcriptionally active and 6 are upregulated after fungal challenge. Synthetic cremycin-5 is active on filamentous fungi and a series of clinical isolates of human pathogenic yeasts and exhibits low haemolysis and high serum stability. The specific distribution of DTAFPs in a clade of moulting animals (Ecdysozoa), including Arthropoda, Nematoda and Tardigrada, together with the widespread presence in plants but the absence in fungi and protozoans, provides evidence for horizontal transfer of a disease resistance gene between plants and ecdysozoans.

Suggested Citation

  • Shunyi Zhu & Bin Gao, 2014. "Nematode-derived drosomycin-type antifungal peptides provide evidence for plant-to-ecdysozoan horizontal transfer of a disease resistance gene," Nature Communications, Nature, vol. 5(1), pages 1-12, May.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms4154
    DOI: 10.1038/ncomms4154
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