Clathrin-dependent endocytosis is required for immunity mediated by pattern recognition receptor kinases - Laboratoire des Interactions Plantes Microbes Environnement Accéder directement au contenu
Article Dans Une Revue Proceedings of the National Academy of Sciences of the United States of America Année : 2016

Clathrin-dependent endocytosis is required for immunity mediated by pattern recognition receptor kinases

Résumé

Sensing of potential pathogenic bacteria is of critical importance for immunity. In plants, this involves plasmamembrane-resident pattern recognition receptors, one of which is the FLAGELLIN SENSING 2 (FLS2) receptor kinase. Ligand-activated FLS2 receptors are internalized into endosomes. However, the extent to which these spatiotemporal dynamics are generally present among pattern recognition receptors (PRRs) and their regulation remain elusive. Using live-cell imaging, we show that at least three other receptor kinases associated with plant immunity, PEP RECEPTOR 1/2 (PEPR1/2) and EF-TU RECEPTOR (EFR), internalize in a ligand-specific manner. In all cases, endocytosis requires the coreceptor BRI1-ASSOCIATED KINASE 1 (BAK1), and thus depends on receptor activation status. We also show the internalization of liganded FLS2, suggesting the transport of signaling competent receptors. Trafficking of activated PRRs requires clathrin and converges onto the same endosomal vesicles that are also shared with the hormone receptor BRASSINOSTERIOD INSENSITIVE 1 (BRI1). Importantly, clathrin-dependent endocytosis participates in plant defense against bacterial infection involving FLS2-mediated stomatal closure and callose deposition, but is uncoupled from activation of the flagellin-induced oxidative burst and MAP kinase signaling. In conclusion, immunity mediated by pattern recognition receptors depends on clathrin, a critical component for the endocytosis of signaling competent receptors into a common endosomal pathway.

Dates et versions

hal-02637371 , version 1 (27-05-2020)

Identifiants

Citer

Malick Mbengue, Gildas Bourdais, Fabio Gervasi, Martina Beck, Ji Zhou, et al.. Clathrin-dependent endocytosis is required for immunity mediated by pattern recognition receptor kinases. Proceedings of the National Academy of Sciences of the United States of America, 2016, 113 (39), pp.11034-11039. ⟨10.1073/pnas.1606004113⟩. ⟨hal-02637371⟩
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