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Binding of Orysata lectin induces an immune response in insect cells

Insect Science 2022年第3期29卷 717-729页

作者： Pengyu Chen kristof De Schutter Jarne Pauwels kris gevaert Els J.M.Van Damme Guy Smagghe Faculty of Bioscience Engineering Department of Plants and CropsGhent UniversityGhentBelgium Faculty of Bioscience Engineering Department of BiotechnologyGhent UniversityGhentBelgium Faculty of Medicine and Health Sciences Department of Biomolecular MedicineGhent UniversityGhentBelgium VIB Center for Medical Biotechnology GhentBelgium

In mammals,plant lectinshave been shown to possess immunomodulatory properties,acting in both the innate and adaptive immune system to modulate the production of mediators of the immune response,ultimately improving host *** present,knowledge of immunomodulatory effects of plant lectins in insects is *** of insect cells with the Orysa sativa lectin,Orysata,was previously reported to induce cell aggregation,mimicking the immune process of *** this project we investigated the potential immunomodulatory effects of this mannose-binding lectin using Drosophila melanogaster S2 *** of the Orysata binding partners on the surface of S2 cells through a pull-down assay andproteomic analysis revealed 221 putative interactors,several of which were immunity-related *** qPCR analysis revealed the upregulation of Toll-and immune deficiency(IMD)-regulated antimicrobial peptides(Drs,Mtk,AttA,and Dpt)and signal transducers(Rel and Hid)belonging to the IMD *** addition,the iron-binding protein Transferrin 3 was identified as a putative interactor for Orysata,and treatment of S2 cells with Orysata was shown to reduce the intracellular iron *** together,we believe these results offer a new perspective on the effects by which plant lectins influence insect cells and contribute to the study of their immunomodulatory properties.

关键词： cell culture immune response iron uptake Orysata plant lectin pull-down

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A Phelipanche ramosa KAI2 protein perceives strigolactones and isothiocyanates enzymatically

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Plant Communications 2021年第5期2卷 132-147页

作者： Alexandre de Saint Germain Anse Jacobs Guillaume Brun Jean-Bernard Pouvreau Lukas Braem David Cornu Guillaume Clavé Emmanuelle Baudu Vincent Steinmetz Vincent Servajean Susann Wicke kris gevaert Philippe Simier Sofie Goormachtig Philippe Delavault François-Didier Boyer Institut Jean-Pierre Bourgin INRAEAgroParisTechUniversitéParis-Saclay78000 VersaillesFrance Department of Plant Biotechnology and Bioinformatics Ghent University9052 GentBelgium Center for Plant Systems Biology VIB9052 GentBelgium Department of Biomolecular Medicine Ghent University9000 GhentBelgium Center for Medical Biotechnology VIB9000 GhentBelgium Laboratoire de Biologie et Pathologie Végétales(LBPV) Equipe d’Accueil 1157Universitéde Nantes44000 NantesFrance Institute for Biology Humboldt-Universit€at zu Berlin10115 BerlinGermany UniversitéParis-Saclay CEACNRSInstitute for Integrative Biology of the Cell(I2BC)91198Gif-sur-YvetteFrance UniversitéParis-Saclay CNRSInstitut de Chimie des Substances NaturellesUPR 230191198Gif-sur-YvetteFrance

Phelipanche ramosa is an obligate root-parasitic weed that threatens major crops in central *** order to germinate,it must perceive various structurally divergent host-exuded signals,including isothiocyanates(ITCs)and strigolactones(SLs).However,the receptors involved are still ***,we identify five putative SL receptors in *** and show that PrKAI2d3 is involved in the stimulation of seed *** demonstrate the high plasticity of PrKAI2d3,which allows it to interact with different chemicals,including *** SL perception mechanism of PrKAI2d3 is similar to that of endogenous SLs in non-parasitic *** provide evidence that PrKAI2d3 enzymatic activity confers hypersensitivity to ***,we demonstrate that methylbutenolide-OH binds PrKAI2d3 and stimulates *** germination with bioactivity comparable to that of *** study demonstrates that *** has extended its signal perception system during evolution,a fact that should be considered for the development of specific and efficient biocontrol methods.

关键词： a/b-hydrolase receptor seed germination stimulant strigolactones isothiocyanates Phelipanche ramosa

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