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--- bacteria:t3e:xopo [2020/07/01 11:47]
jakubpecenka
+++ bacteria:t3e:xopo [2020/07/09 11:08]
rkoebnik [References]
@@ Line 2: / Line 2: @@
 Author: Harrold van den Burg\\
-Internal reviewer: Jakub Pecenka\\
+Internal reviewer: [[https://www.researchgate.net/profile/Jakub_Pecenka|Jakub Pečenka]]\\
 Expert reviewer: FIXME
 Class: XopO\\
 Family: XopO\\
-Prototype: XopO (//Xanthomonas euvesicatoria// pv. //euvesicatoria// aka //Xanthomonas campestris// pv. //vescicatoria//; strain 85-10)\\
+Prototype: XopO (//Xanthomonas euvesicatoria// pv. //euvesicatoria//, ex //Xanthomonas campestris// pv. //vesicatoria//; strain 85-10)\\
 RefSeq ID: [[https://www.ncbi.nlm.nih.gov/ipg/3884105|AAV74207.1]] (220 aa)\\
 D structure: Unknown
@@ Line 15: / Line 15: @@
 === How discovered? ===
-XopO was discovered by a random transponson insertion (Tn5) screen using a AvrBs2<sub>62-547</sub> reporter (readout: hypersensitive response), a construct that lacks the endogenous type-III secretion and translocation signal (Roden //et al//., 2004).
+XopO was identified in a genetic screen, using a Tn//5//-based transposon construct harboring the coding sequence for the HR-inducing domain of AvrBs2, but devoid of the effectors' T3SS signal, that was randomly inserted into the genome of //X. campestris// pv. //vesicatoria// (//Xcv//)// //// //strain 85-10. The XopO::AvrBs2 fusion protein triggered a //Bs2//-dependent hypersensitive response (HR) in pepper leaves (Roden //et al//., 2004).
 === (Experimental) evidence for being a T3E ===
-XopO fused to the Cya reporter was used to show that it is translocated into plant cells in a //hrpF//-dependent manner (Roden //et al//., 2004).
+Type III-dependent secretion was confirmed using a calmodulin-dependent adenylate cyclase reporter assay, with a Δ//hrpF// mutant strain serving as negative control (Roden //et al.//, 2004).
 === Regulation ===
@@ Line 24: / Line 24: @@
 === Phenotypes ===
-XopO from Xcv 85-10 inhibits cell death in //N. benthamiana// (Teper //et al//., 2015). XopO suppresses //X. euvesicatoria-//induced chlorosis in leaves of susceptible tomato (Teper //et al//., 2015). The //xopO// gene is a differential T3E gene between //Xoo// and //Xoc// (Hajri //et al//., 2012). XopO failed to inhibit expression of the reporter gene //FRK1// in response to application of a PAMP, i.e. flg22 peptide (Popov //et al//., 2016). Based on whole genome sequences of //X. euvesicatoria// strains, it was concluded that the //xopO// gene has suffered from mutational inactivation by at least four different events, suggesting that selection pressure favors loss of //xopO// function in this pathogen (Barak //et al//., 2016).
+  * Roden et al. did not find significant growth defects of a //Xcv//  Δ//xopO//  mutant in susceptible pepper and tomato leaves (Roden et al., 2004).
+  * XopO from //Xcv//  85-10 inhibits cell death in //N. benthamiana//  (Teper //et al//., 2015).
+  * XopO suppresses //X. euvesicatoria-//induced chlorosis in leaves of susceptible tomato (Teper //et al//., 2015).
+  * XopO failed to inhibit expression of the reporter gene //FRK1//  in response to application of a PAMP, i.e. flg22 peptide (Popov //et al//., 2016).
+  * Based on whole genome sequences of //X. euvesicatoria//  strains, it was concluded that the //xopO//  gene has suffered from mutational inactivation by at least four different events, suggesting that selection pressure favors loss of //xopO//  function in this pathogen (Barak //et al//., 2016).
 === Localization ===
@@ Line 36: / Line 41: @@
 XopO was shown to interact with tomato 14-3-3- proteins (TFT) (Dubrow //et al//., 2018).
 ===== Conservation =====
 === In xanthomonads ===
-Yes, in some //Xanthomonads// (e.g. //X. oryzae// pv. //oryzicola//) (Lang //et al//., 2019).
+Yes, in some xanthomonads (//e.g.//, //X. euvesicatoria//, //X. oryzae//) (Lang //et al//., 2019). The //xopO//  gene is a differential T3E gene between //Xoo//  and //Xoc//  (Hajri //et al//., 2012).
 === In other plant pathogens/symbionts ===
-Yes, e. g. //Pseudomonas syringae// (Li //et al//., 2014).
+Yes, //e.g.//  //Pseudomonas syringae//  (Li //et al//., 2014).
 ===== References =====
@@ Line 52: / Line 60: @@
 Hajri A, Brin C, Zhao S, David P, Feng JX, Koebnik R, Szurek B, Verdier V, Boureau T, Poussier S (2012). Multilocus sequence analysis and type III effector repertoire mining provide new insights into the evolutionary history and virulence of //Xanthomonas oryzae//. Mol. Plant Pathol. 13: 288-302. DOI: [[https://doi.org/10.1111/j.1364-3703.2011.00745.x|10.1111/j.1364-3703.2011.00745.x]]
-Koebnik R, Kruger A, Thieme F, Urban A, Bonas U (2006). Specific binding of the Xanthomonas campestris pv. vesicatoria AraC-type transcriptional activator HrpX to plant-inducible promoter boxes. J. Bacteriol. 188: 7652-7660. DOI: [[https://doi.org/10.1128/JB.00795-06|10.1128/JB.00795-06]]
+Koebnik R, Krüger A, Thieme F, Urban A, Bonas U (2006). Specific binding of the Xanthomonas campestris pv. vesicatoria AraC-type transcriptional activator HrpX to plant-inducible promoter boxes. J. Bacteriol. 188: 7652-7660. DOI: [[https://doi.org/10.1128/JB.00795-06|10.1128/JB.00795-06]]
 Lang JM, Pérez-Quintero AL, Koebnik R, DuCharme E, Sarra S, Doucoure H, Keita I, Ziegle J, Jacobs JM, Oliva R, Koita O, Szurek B, Verdier V, Leach JE (2019). A pathovar of //Xanthomonas oryzae //infecting wild grasses provides insight into the evolution of pathogenicity in rice agroecosystems. Front. Plant Sci. 10: 1–15. DOI: [[https://doi.org/10.1094/MPMI-07-16-0137-R|10.3389/fpls.2019.00507]]
@@ Line 61: / Line 69: @@
 Roden JA, Belt B, Ross JB, Tachibana T, Vargas J, Mudgett MB (2004). A genetic screen to isolate type III effectors translocated into pepper cells during //Xanthomonas// infection. Proc. Natl. Acad. Sci. USA 101: 16624-16629. DOI: [[https://doi.org/10.1073/pnas.0407383101|10.1073/pnas.0407383101]]
+Sohn KH, Zhang Y, Jones JD (2009). The //Pseudomonas syringae// effector protein, AvrRPS4, requires in planta processing and the KRVY domain to function. Plant J. 57: 1079-1091. DOI: [[https://doi.org/10.1111/j.1365-313X.2008.03751.x|10.1111/j.1365-313X.2008.03751.x]] FIXME Information needs to be added to the profile.
 Teper D, Sunitha S, Martin GB, Sessa G (2015). Five //Xanthomonas// type III effectors suppress cell death induced by components of immunity-associated MAP kinase cascades. Plant Signal. Behav. 10: e1064573. DOI: [[https://doi.org/10.1080/15592324.2015.1064573|10.1080/15592324.2015.1064573]]

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