Bacterial effector modulation of host E3 ligase activity suppresses PAMP-triggered immunity in rice
| Autor: | Tsutomu Kawasaki, Chojiro Kojima, Kazuaki Sakamoto, Kento Inoue, Satomi Yoshimura, Kazuya Ishikawa, Koji Yamaguchi, Seiji Tsuge |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Xanthomonas
Ubiquitin-Protein Ligases General Physics and Astronomy Plant Immunity Peptidoglycan General Biochemistry Genetics and Molecular Biology Xanthomonas oryzae Immune system Ubiquitin Bacterial Proteins Immunity Ligase activity Gene Silencing Plant Diseases Plant Proteins Multidisciplinary biology Effector Pathogen-Associated Molecular Pattern Molecules food and beverages Oryza General Chemistry biology.organism_classification Ubiquitin ligase Cell biology Host-Pathogen Interactions biology.protein |
| Zdroj: | Nature communications. 5 |
| ISSN: | 2041-1723 |
| Popis: | Pathogen effector proteins are delivered to host cells to suppress plant immunity. However, the mechanisms by which effector proteins function are largely unknown. Here we show that expression of XopP(Xoo), an effector of rice pathogen Xanthomonas oryzae pv. oryzae, in rice strongly suppresses peptidoglycan (PGN)- and chitin-triggered immunity and resistance to X. oryzae. XopP(Xoo) targets OsPUB44, a rice ubiquitin E3 ligase with a unique U-box domain. We find that XopP(Xoo) directly interacts with the OsPUB44 U-box domain and inhibits ligase activity. Two amino-acid residues specific for the OsPUB44 U-box domain are identified, which are responsible for the interaction with XopP(Xoo). Silencing of OsPUB44 suppresses PGN- and chitin-triggered immunity and X. oryzae resistance, indicating that OsPUB44 positively regulates immune responses. Thus, it is likely that XopP(Xoo) suppresses immune responses by directly interacting with and inhibiting a positive regulator of plant immunity. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|