It is becoming increasingly clear that ubiquitination plays a large role during plant responses to pathogens (reviewed in Trujillo and Shirasu, 2010). Pathogen-associated molecular pattern (PAMP)–triggered immunity (PTI) in plants elicits broad-spectrum resistance to pathogens and has been shown to be downregulated in Arabidopsis thaliana by the related plant U-box–type E3 ubiquitin ligases PUB22, PUB23, and PUB24 (Trujillo et al., 2008). In new work, Stegmann et al. (pages 4703-4716) report that the exocyst component Exo70B2 is important for PTI and is targeted for ubiquitination by PUB22.
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机译：越来越清楚的是，泛素化在植物对病原体的反应中起着重要作用（Trujillo and Shirasu，2010年综述）。植物中的病原体相关分子模式（PAMP）触发的免疫（PTI）引起对病原体的广谱抗性，并且已证明拟南芥中相关植物U-box型E3泛素连接酶PUB22，PUB23和PUB24（Trujillo et al。，2008）。在新工作中，Stegmann等人。 （第4703-4716页）报告说，囊外成分Exo70B2对PTI很重要，并被PUB22泛素化。
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