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Divergent sequences of tetraspanins enable plants to specifically recognize microbe-derived extracellular vesicles
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Divergent sequences of tetraspanins enable plants to specifically recognize microbe-derived extracellular vesicles
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Journal Article
Divergent sequences of tetraspanins enable plants to specifically recognize microbe-derived extracellular vesicles
2023
Overview
Extracellular vesicles (EVs) are important for cell-to-cell communication in animals. EVs also play important roles in plant–microbe interactions, but the underlying mechanisms remain elusive. Here, proteomic analyses of EVs from the soybean (
Glycine max
) root rot pathogen
Phytophthora sojae
identify the tetraspanin family proteins PsTET1 and PsTET3, which are recognized by
Nicotiana benthamiana
to trigger plant immune responses. Both proteins are required for the full virulence of
P. sojae
. The large extracellular loop (EC2) of PsTET3 is the key region recognized by
N. benthamiana
and soybean cells in a plant receptor-like kinase NbSERK3a/b dependent manner. TET proteins from oomycete and fungal plant pathogens are recognized by
N. benthamiana
thus inducing immune responses, whereas plant-derived TET proteins are not due to the sequence divergence of sixteen amino acids at the C-terminal of EC2. This feature allows plants to distinguish self and non-self EVs to trigger active defense responses against pathogenic eukaryotes.
Extracellular vesicles (EVs) are important in plant-microbe interactions. Here we show that the divergent sequences within tetraspanins localized at EV membranes enable plant innate immune system to distinguish between self and non-self EVs.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
