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--- bacteria:t3e:xopaa [2023/12/08 12:03] – [Biological function] rkoebnik
+++ bacteria:t3e:xopaa [2025/02/12 23:09] (current) – jfpothier
@@ Line 1: / Line 1: @@
-====== XopAA ======
+====== The Type III Effector XopAA from //Xanthomonas// ======
-Author: [[https://www.researchgate.net/profile/Ralf-Koebnik|Ralf Koebnik]]\\
+Author: [[https://www.researchgate.net/profile/Ralf-Koebnik|Ralf Koebnik]]
-Internal reviewer:\\
-Expert reviewer: **WANTED!**
 Class: XopAA\\
@@ Line 27: / Line 25: @@
 === Regulation ===
-RT-PCR expression analyses suggested that, although translocation of XopAA is dependent on the Hrp T3SS apparatus, //xopAA// expression does not depend on nutritional conditions that induce //hrp// gene expression in //Xee // (Morales //et al.//, 2005).
+RT-PCR expression analyses suggested that, although translocation of XopAA is dependent on the Hrp T3SS apparatus, //xopAA// expression does not depend on nutritional conditions that induce //hrp// gene expression in //Xee// (Morales //et al.//, 2005).
 === Phenotypes ===
-//Xanthomonas oryzae //pv. //oryzicola// bacteria with a deletion of //xopAA// were found to cause enhanced virulence to a certain rice cultivar (Li //et al.//, 2015).
+Transgenic rice plants expressing XopAA//<sub>Xoo</sub>// exhibited semi-dwarfism and a reduction in Brassinolide-dependent laminar inclination, characteristics of brassinosteroid (BR)-insensitive mutants caused by mutations of the BR receptor (Yamaguchi //et al.//, 2013).
-XopAA from //X. oryzae// pv. //oryzae// was found to inhibited host resistance to //X. oryzae//.
+Rice plants inoculated with a T3SS-deficient //hrpX// mutant of //X. oryzae// pv. //oryzae// (//Xoo//) did not develop disease lesions. In contrast, a transgenic rice line overexpressing //xopAA// showed severe lesions when inoculated with the //Xoo// //hrpX// mutant and the bacterial population of the //hrpX// mutant was 100-fold higher in the transgenic plants than in wild-type plants. This observation led the authors conclude that XopAA<sub>//Xoo//</sub> inhibits resistance to //Xoo//, which was probably caused by suppression of host PTI (Yamaguchi //et al.//, 2013). However, a //xopAA// knock-out strain of //Xoo// did not exhibit any defect in virulence (Yamaguchi //et al.//, 2013).
-Expression of XopAA//<sub>Xoo</sub> // in //Arabidopsis// cells activated host immune responses, suggesting the presence of intracellular immune receptors that recognize XopAA.
+Expression of XopAA<sub>//Xoo//</sub> in //Arabidopsis// cells activated host immune responses, suggesting the presence of intracellular immune receptors that recognize XopAA (Yamaguchi //et al.//, 2013).
+//Xanthomonas oryzae// pv. //oryzicola// bacteria with a deletion of //xopAA// were found to cause enhanced virulence to a certain rice cultivar (Li //et al.//, 2015).
 === Localization ===
@@ Line 45: / Line 45: @@
 === Interaction partners ===
-A yeast two-hybrid experiment indicated that XopAA<sub>//Xoo// </sub> interacted with OsBAK1, an essential component of both microbe-associated molecular patterns (MAMPs) and BR receptors, suggesting that the virulent activity of XopAA is mediated by inhibition of OsBAK1.
+A yeast two-hybrid experiment indicated that XopAA<sub>//Xoo//</sub> interacted with OsBAK1, an essential component of both microbe-associated molecular patterns (MAMPs) and BR receptors, suggesting that the virulent activity of XopAA is mediated by inhibition of OsBAK1 (Yamaguchi //et al.//, 2013).
 ===== Conservation =====

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