Differences

This shows you the differences between two versions of the page.

--- bacteria:t3e:xopp [2025/07/28 15:16] – [Biological function] rkoebnik
+++ bacteria:t3e:xopp [2025/11/15 14:15] (current) – jfpothier
@@ Line 23: / Line 23: @@
 The //xopP// <sub>Xcc8004</sub> gene contains a PIP box and was shown to be controlled by //hrpG// and //hrpX// (Jiang et al., 2009).
-qRT-PCR revealed that transcript levels of 15 out of 18 tested non-TAL effector genes (as well as the regulatory genes //hrpG// and //hrpX//), including //xopP//, were significantly reduced in the //Xanthomonas oryzae// pv. //oryzae// Δ//xrvC// mutant compared with those in the wild-type strain PXO99<sup>A</sup>  (Liu //et al.//, 2016).
+qRT-PCR revealed that transcript levels of 15 out of 18 tested non-TAL effector genes (as well as the regulatory genes //hrpG// and //hrpX//), including //xopP//, were significantly reduced in the //Xanthomonas oryzae// pv. //oryzae// Δ//xrvC// mutant compared with those in the wild-type strain PXO99<sup>A</sup> (Liu //et al.//, 2016).
 === Phenotypes ===
-  * Roden //et al.//  did not find significant growth defects of a //Xcv//  Δ//xopP//  mutant in susceptible pepper and tomato leaves (Roden et al., 2004).
+  * Roden //et al.// did not find significant growth defects of a //Xcv// Δ//xopP// mutant in susceptible pepper and tomato leaves (Roden et al., 2004).
-  * XopQ<sub>Xcc8004</sub>  is required for full virulence and growth of //X. campestris//  pv. //campestris//  in the host plant Chinese radish (Jiang //et al.//, 2009).
+  * XopQ<sub>Xcc8004</sub> is required for full virulence and growth of //X. campestris// pv. //campestris// in the host plant Chinese radish (Jiang //et al.//, 2009).
-  * XopP<sub>Xoo</sub>  is able to suppress rice pathogen associated molecular pattern (PAMP)-immunity and resistance to //Xanthomonas oryzae//  pv. //oryzae//. Although XopP<sub>Xoo</sub>  is classified within the XopP, it shows only 40% sequence identity with the XopP homologue of //X. campestris//  pv. //campestris//  (Furutani //et al//., 2009). Therefore, it remains unclear if such interaction is similar in different pathosystems where XopP has been found.
+  * XopP<sub>Xoo</sub> is able to suppress rice pathogen associated molecular pattern (PAMP)-immunity and resistance to //Xanthomonas oryzae// pv. //oryzae//. Although XopP<sub>Xoo</sub> is classified within the XopP, it shows only 40% sequence identity with the XopP homologue of //X. campestris// pv. //campestris// (Furutani //et al//., 2009). Therefore, it remains unclear if such interaction is similar in different pathosystems where XopP has been found.
-  * //Agrobacterium//-mediated transient expression of both XopQ and XopX in rice cells resulted in induction of rice immune responses, which were not observed when either protein was individually expressed. A screen for //Xanthomonas//  effectors which can suppress XopQ-XopX induced rice immune responses, led to the identification of five effectors, namely XopU, XopV, XopP, XopG and AvrBs2, that could individually suppress these immune responses. These results suggest a complex interplay of //Xanthomonas//  T3SS effectors in suppression of both pathogen-triggered immunity and effector-triggered immunity to promote virulence on rice (Deb //et al.//, 2020).
+  * //Agrobacterium//-mediated transient expression of both XopQ and XopX in rice cells resulted in induction of rice immune responses, which were not observed when either protein was individually expressed. A screen for //Xanthomonas// effectors which can suppress XopQ-XopX induced rice immune responses, led to the identification of five effectors, namely XopU, XopV, XopP, XopG and AvrBs2, that could individually suppress these immune responses. These results suggest a complex interplay of //Xanthomonas// T3SS effectors in suppression of both pathogen-triggered immunity and effector-triggered immunity to promote virulence on rice (Deb //et al.//, 2020).
-  * XopP inhibits the function of the host-plant exocyst complex by direct targeting of Exo70B, a subunit of the exocyst complex, which plays a significant role in plant immunity. XopP interferes with exocyst-dependent exocytosis, and can do this without activating a plant NLR (NOD-like receptor) that guards Exo70B in Arabidopsis. In this way, //Xanthomonas//  efficiently inhibits the host's pathogen-associated molecular pattern (PAMP)-triggered immunity (PTI) by blocking exocytosis of pathogenesis-related protein-1A (PR1a), callose deposition and localization of the FLS2 immune receptor to the plasma membrane, thus promoting successful infection (Michalopoulou //et al.//, 2022).
+  * XopP inhibits the function of the host-plant exocyst complex by direct targeting of Exo70B, a subunit of the exocyst complex, which plays a significant role in plant immunity. XopP interferes with exocyst-dependent exocytosis, and can do this without activating a plant NLR (NOD-like receptor) that guards Exo70B in Arabidopsis. In this way, //Xanthomonas// efficiently inhibits the host's pathogen-associated molecular pattern (PAMP)-triggered immunity (PTI) by blocking exocytosis of pathogenesis-related protein-1A (PR1a), callose deposition and localization of the FLS2 immune receptor to the plasma membrane, thus promoting successful infection (Michalopoulou //et al.//, 2022).
-  * Using biophysical, biochemical, and molecular assays in combination with structural and functional predictions, utilizing AplhaFold and DALI online, it was shown that XopP<sub>Xcc</sub>  functions as a novel serine/threonine kinase upon its host target AtExo70B1 but also protects the latter from the innate AtCPK5 phosphorylation, in order to bypass the host’s immune responses (Kotsaridis //et al.//, 2023).
+  * Using biophysical, biochemical, and molecular assays in combination with structural and functional predictions, utilizing AplhaFold and DALI online, it was shown that XopP<sub>Xcc</sub> functions as a novel serine/threonine kinase upon its host target AtExo70B1 but also protects the latter from the innate AtCPK5 phosphorylation, in order to bypass the host’s immune responses (Kotsaridis //et al.//, 2023).
 === Localization ===
-XopP<sub>Xoo</sub>  co-localizes with OsPUB44 in the cytoplasm (Ishikawa //et al//., 2014).
+XopP<sub>Xoo</sub> co-localizes with OsPUB44 in the cytoplasm (Ishikawa //et al//., 2014).
 === Enzymatic function ===
-XopP<sub>Xcc</sub>  functions as a novel serine/threonine kinase upon its host target AtExo70B1, which gets phosphorylated at Ser107, Ser111, Ser248, Thr309, and Thr364 (Kotsaridis //et al.//, 2023).
+XopP<sub>Xcc</sub> functions as a novel serine/threonine kinase upon its host target AtExo70B1, which gets phosphorylated at Ser107, Ser111, Ser248, Thr309, and Thr364 (Kotsaridis //et al.//, 2023).
 === Interaction partners ===
-XopP<sub>Xoo</sub>  interacts with the U-box domain of a rice ubiquitin E3 ligase, OsPUB44 and inhibits its activity (Ishikawa //et al//., 2014). XopP<sub>Xcc</sub>  interacts with EXO70B1, EXO70B2 and EXO70F1 in a yeast two-hybrid assay (Michalopoulou //et al.//, 2022). Interaction was confirmed in planta by split YFP and coIP assays (Michalopoulou //et al.//, 2022).
+XopP<sub>Xoo</sub> interacts with the U-box domain of a rice ubiquitin E3 ligase, OsPUB44 and inhibits its activity (Ishikawa //et al//., 2014). XopP<sub>Xcc</sub> interacts with EXO70B1, EXO70B2 and EXO70F1 in a yeast two-hybrid assay (Michalopoulou //et al.//, 2022). Interaction was confirmed in planta by split YFP and coIP assays (Michalopoulou //et al.//, 2022).
 ===== Conservation =====

EuroXanth DokuWiki

User Tools

Site Tools

Differences

Page Tools