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bacteria:t3e:xopk [2025/03/31 15:50] – [Biological function] rkoebnikbacteria:t3e:xopk [2025/03/31 15:54] (current) – [Biological function] rkoebnik
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 === Phenotypes === === Phenotypes ===
  
-  * Deletion of XopK has been shown not to affect the virulence of //X. oryzae//  pv. //oryzae//  PXO99A in rice IR24 plants; these differential results could be attributed to different genotypes of the rice cultivar or field conditions for plant growth (Song & Yang, 2010).+  * Deletion of XopK has been shown not to affect the virulence of //X. oryzae//  pv. //oryzae//  (//Xoo//) PXO99<sup>A</sup>   in rice IR24 plants; these differential results could be attributed to different genotypes of the rice cultivar or field conditions for plant growth (Song & Yang, 2010).
   * A ∆//xopK//  mutant strain of //Xanthomonas phaseoli//  pv. //manihotis//  (aka //Xanthomonas axonopodis//  pv. //manihotis//) exhibited enhanced induction of disease symptoms in cassava at the site of inoculation but reduced spread through the vasculature (Mutka //et al.//, 2016).   * A ∆//xopK//  mutant strain of //Xanthomonas phaseoli//  pv. //manihotis//  (aka //Xanthomonas axonopodis//  pv. //manihotis//) exhibited enhanced induction of disease symptoms in cassava at the site of inoculation but reduced spread through the vasculature (Mutka //et al.//, 2016).
-  * XopK inhibits pathogen-associated molecular pattern-triggered immunity upstream of mitogen-activated protein kinase cascades (Qin //et al.//, 2018)+  * XopK<sub>//Xoo// </sub>  inhibits pathogen-associated molecular pattern-triggered immunity upstream of mitogen-activated protein kinase cascades (Qin //et al.//, 2018)
   * Transgenic strawberries expressing XopK exhibit increased susceptibility to //Xanthomonas fragariae//  strain YL19, and this was associated with weakened stomatal immunity. Additionally, abscisic acid (ABA) accumulation and signaling were significantly suppressed in XopK-overexpressing strawberry plants. Overexpression of XopK also inhibited ABA- and methyl jasmonate (MeJA)-induced stomatal closure in strawberry leaves. Moreover, endogenous ABA is critical for //X. fragariae//-induced stomatal closure. These results suggested that //X. fragariae//  strain YL19 uses XopK to suppress ABA signaling to disrupt stomatal closure allowing bacterial colonization for disease development (Cai //et al.//, 2025).   * Transgenic strawberries expressing XopK exhibit increased susceptibility to //Xanthomonas fragariae//  strain YL19, and this was associated with weakened stomatal immunity. Additionally, abscisic acid (ABA) accumulation and signaling were significantly suppressed in XopK-overexpressing strawberry plants. Overexpression of XopK also inhibited ABA- and methyl jasmonate (MeJA)-induced stomatal closure in strawberry leaves. Moreover, endogenous ABA is critical for //X. fragariae//-induced stomatal closure. These results suggested that //X. fragariae//  strain YL19 uses XopK to suppress ABA signaling to disrupt stomatal closure allowing bacterial colonization for disease development (Cai //et al.//, 2025).
  
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 === Interaction partners === === Interaction partners ===
  
-XopK interacted with and directly ubiquitinated rice somatic embryogenic receptor kinase 2 (OsSERK2), resulting in its degradation (Qin //et al//., 2018)+XopK<sub>//Xoo// </sub>  interacted with and directly ubiquitinated rice somatic embryogenic receptor kinase 2 (OsSERK2), resulting in its degradation (Qin //et al//., 2018)
  
 ===== Conservation ===== ===== Conservation =====
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 Cai XL, Zhang W, Yu H, Wen YQ, Feng JY (2024). The //Xanthomonas fragariae// effector XopK suppresses stomatal immunity by perturbing abscisic acid accumulation and ABA-transciptional responses in strawberry. Plant Physiol. Biochem. Cai XL, Zhang W, Yu H, Wen YQ, Feng JY (2024). The //Xanthomonas fragariae// effector XopK suppresses stomatal immunity by perturbing abscisic acid accumulation and ABA-transciptional responses in strawberry. Plant Physiol. Biochem.
- <font 11.0pt/inherit;;inherit;;inherit>219: 109368</font>  . DOI: [[https://doi.org/10.1016/j.plaphy.2024.109368|10.1016/j.plaphy.2024.109368]]+ <font 11.0pt/inherit;;inherit;;inherit>219: 109368</font> . DOI: [[https://doi.org/10.1016/j.plaphy.2024.109368|10.1016/j.plaphy.2024.109368]]
  
 Furutani A, Nakayama T, Ochiai H, Kaku H, Kubo Y, Tsuge S (2006). Identification of novel HrpXo regulons preceded by two //cis//-acting elements, a plant-inducible promoter box and a -10 box-like sequence, from the genome database of //Xanthomonas oryzae// pv. oryzae. FEMS Microbiol. Lett. 259: 133-141. DOI: [[https://doi.org/10.1111/j.1574-6968.2006.00265.x|10.1111/j.1574-6968.2006.00265.x]] Furutani A, Nakayama T, Ochiai H, Kaku H, Kubo Y, Tsuge S (2006). Identification of novel HrpXo regulons preceded by two //cis//-acting elements, a plant-inducible promoter box and a -10 box-like sequence, from the genome database of //Xanthomonas oryzae// pv. oryzae. FEMS Microbiol. Lett. 259: 133-141. DOI: [[https://doi.org/10.1111/j.1574-6968.2006.00265.x|10.1111/j.1574-6968.2006.00265.x]]
bacteria/t3e/xopk.1743432620.txt.gz · Last modified: 2025/03/31 15:50 by rkoebnik

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