Effector-triggered processing body formation attenuates host translation via ER stress responses and autophagy upon bacterial infection
Gonzalez-Fuente, M.; Schulz, N.; Abdrakhmanov, A.; Izzati, G.; Zhu, S.; Langin, G.; Gouguet, P.; Franz-Wachtel, M.; Macek, B.; Hafren, A.; Dagdas, Y.; Üstün, S.
Show abstract
Pathogens employ sophisticated strategies to modulate host protein homeostasis by targeting proteolytic pathways, but their impact on protein synthesis remains elusive. We report that pathogenic bacteria Pseudomonas syringae (Pst) targets ribonucleoprotein condensates, known as processing bodies (P-bodies), to attenuate host translation through two effectors with liquid-like properties. We uncovered a previously unknown link that Pst-mediated repression of the ER stress response is required for P-body assembly. Furthermore, we identify a novel intersection between P-bodies and autophagy, demonstrating that autophagic clearance of P-bodies is crucial for maintaining the balance between translationally active and inactive mRNAs. Altogether, our discoveries provide novel insights on how host translation is attenuated by bacteria to dampen plant immunity and uncover unknown connections between ER stress responses and autophagy with P-body dynamics.
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