例如:"lncRNA", "apoptosis", "WRKY"

Phosphorylation-Regulated Activation of the Arabidopsis RRS1-R/RPS4 Immune Receptor Complex Reveals Two Distinct Effector Recognition Mechanisms.

Cell Host Microbe. 2020 May 13;27(5):769-781.e6. Epub 2020 Mar 31
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摘要


The Arabidopsis immune receptors RPS4 and RRS1 interact to co-confer responsiveness to bacterial effectors. The RRS1-R allele, with RPS4, responds to AvrRps4 and PopP2, whereas RRS1-S responds only to AvrRps4. Here, we show that the C terminus of RRS1-R but not RRS1-S is phosphorylated. Phosphorylation at Thr1214 in the WRKY domain maintains RRS1-R in its inactive state and also inhibits acetylation of RRS1-R by PopP2. PopP2 in turn catalyzes O-acetylation at the same site, thereby preventing its phosphorylation. Phosphorylation at other sites is required for PopP2 but not AvrRps4 responsiveness and facilitates the interaction of RRS1's C terminus with its TIR domain. Derepression of RRS1-R or RRS1-S involves effector-triggered proximity between their TIR domain and C termini. This effector-promoted interaction between these domains relieves inhibition of TIRRPS4 by TIRRRS1. Our data reveal effector-triggered and phosphorylation-regulated conformational changes within RRS1 that results in distinct modes of derepression of the complex by PopP2 and AvrRps4.

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