ArticleAdvanced science (Weinheim, Baden-Wurttemberg, Germany)2025
Post-Translational Modifications of TOE3 Regulate Antiviral Defense in Tobacco.
Article in Advanced science (Weinheim, Baden-Wurttemberg, Germany), 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed.
- The Small GTPase RHO1 Regulates ROS Homeostasis and Differentially Responds to Pathogens Infection via Interaction With Aquaporin TIP1;1 in Nicotiana.Molecular plant pathology · 2026Article
- A transcription factor TOE3 simultaneously promotes growth and antiviral immunity by disrupting ABA core module in tobacco.Science advances · 2026Article
- Post-Translational Modifications of TOE3 Regulate Antiviral Defense in Tobacco.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2025Article
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Authors and funding
4 authors.
Funding
Abstract
Post-translational modifications (PTMs) affect the function of transcription factors and regulate plant immune responses. APETALA2 (AP2) transcription factor TARGET OF EAT3 (TOE3) plays a pivotal role in plant antiviral immunity. However, little is known about the impact of PTMs on TOE3 function. Here, that casein kinase II α subunit-like protein (CK2αL) is identified to interact with TOE3, phosphorylating it at serine 58 (S58) and threonine 128 (T128). Overexpression of CK2αL enhances the stability of TOE3 to upregulate the expression of defense-related genes, thereby improving tobacco resistance to tobacco mosaic virus (TMV). Additionally, the F-box protein FBXL1 interacts with TOE3 and promotes the ubiquitination-degradation of TOE3 through the 26S proteasome, and overexpression of FBXL1 facilitates TMV infection in tobacco. Importantly, CK2αL-phosphorylated TOE3 exhibits a lower binding affinity to FBXL1 compared to the nonphosphorylated TOE3, thereby protecting TOE3 from FBXL1-mediated degradation by the 26S proteasome. The stable TOE3 activates the expression of defense-related genes to enhance the resistance of plants to viral infection. Taken together, the findings demonstrate a mechanism by which phosphorylation and ubiquitination cooperatively regulate the stability of TOE3 to fine-tune antiviral immunity in tobacco.
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