New insights into plant natriuretic peptide evolution : from the lysogenic conversion in Xanthomonas to the lateral transfer to the whitefly Bemisia tabaci.
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2022
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Plant natriuretic peptide-like (PNP) are signaling molecules related to adaptive responses to stress. The Arabidopsis thaliana PNP (AtPNP-A) is capable of modulating catalase 2 (CAT2) and rubisco activase (RCA) activity in
some circumstances. Interestingly, many plant-pathogens co-opted PNP-like molecules to their benefit. For
instance, the citrus pathogen Xanthomonas citri carries a PNP-like (XacPNP) that can mimic and regulate plant
homeostasis, and many phytopathogenic fungi carry effectors (e.g., Ave1 and AvrLm6) that are indeed PNP-like
homologs. This work investigates the PNP-like evolution across the tree of life, revealing many parallel gains and
duplications in plant and fungi kingdoms. All PNP-like proteins in the final dataset are structurally similar,
containing the AtPNP-A active domains modulating CAT2 activity and RCA interaction. Comparative genomics
evinced that XacPNP is a lysogenic conversion factor associated with a Myoviridae-like prophage identified in
many Xanthomonas species. Surprisingly, a PNP-like homolog was identified in Bemisia tabaci, an important
agricultural pest, being to date the second example of lateral gene transfer (LGT) from plant to the whitefly.
Moreover, the Bemisia PNP-like homolog can also be considered a potential new effector of this phloem-feeding
insect. Noteworthy, the whiteflies infest many plants carrying PNP-like copies and interact with some of their
bacterial and fungal pathogens, strongly suggesting complex recipient/donor traits of PNP by LGT and bringing
new insights into the evolution of host-pathogen arms race across the tree of life.
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Genome evolution, Effectors, Lateral gene transfer, Transduction, Plant-pathogen interactions
Citação
PATANÉ, J. S. L. et al. New insights into plant natriuretic peptide evolution : from the lysogenic conversion in Xanthomonas to the lateral transfer to the whitefly Bemisia tabaci. Gene, v. 821, artigo 146326, maio 2022. Disponível em: <https://www.sciencedirect.com/science/article/pii/S0378111922001457>. Acesso em: 01 ago. 2023.