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The potential use of the Penicillium chrysogenum antifungal protein PAF, the designed variant PAFopt and its γ-core peptide Pγopt in plant protection.
Microbial Biotechnology ( IF 4.8 ) Pub Date : 2020-03-24 , DOI: 10.1111/1751-7915.13559
Liliána Tóth 1 , Éva Boros 2 , Péter Poór 3 , Attila Ördög 3 , Zoltán Kele 4 , Györgyi Váradi 4 , Jeanett Holzknecht 5 , Doris Bratschun-Khan 5 , István Nagy 2 , Gábor K Tóth 4, 6 , Gábor Rákhely 7, 8 , Florentine Marx 5 , László Galgóczy 1, 7
Affiliation  

The prevention of enormous crop losses caused by pesticide‐resistant fungi is a serious challenge in agriculture. Application of alternative fungicides, such as antifungal proteins and peptides, provides a promising basis to overcome this problem; however, their direct use in fields suffers limitations, such as high cost of production, low stability, narrow antifungal spectrum and toxicity on plant or mammalian cells. Recently, we demonstrated that a Penicillium chrysogenum‐based expression system provides a feasible tool for economic production of P. chrysogenum antifungal protein (PAF) and a rational designed variant (PAFopt), in which the evolutionary conserved γ‐core motif was modified to increase antifungal activity. In the present study, we report for the first time that γ‐core modulation influences the antifungal spectrum and efficacy of PAF against important plant pathogenic ascomycetes, and the synthetic γ‐core peptide Pγopt, a derivative of PAFopt, is antifungal active against these pathogens in vitro. Finally, we proved the protective potential of PAF against Botrytis cinerea infection in tomato plant leaves. The lack of any toxic effects on mammalian cells and plant seedlings, as well as the high tolerance to harsh environmental conditions and proteolytic degradation further strengthen our concept for applicability of these proteins and peptide in agriculture.

中文翻译:


产黄青霉抗真菌蛋白 PAF、设计的变体 PAFopt 及其 γ 核心肽 Pγopt 在植物保护中的潜在用途。



防止抗农药真菌造成的巨大农作物损失是农业面临的严峻挑战。替代杀菌剂(例如抗真菌蛋白和肽)的应用为克服这一问题提供了有希望的基础;然而,它们在现场的直接使用受到限制,例如生产成本高、稳定性低、抗真菌谱窄以及对植物或哺乳动物细胞有毒性。最近,我们证明基于Penicillium chrysogenum的表达系统为经济生产P. chrysogenum抗真菌蛋白(PAF)和合理设计的变体(PAF opt )提供了可行的工具,其中进化保守的γ-核心基序被修改为增加抗真菌活性。在本研究中,我们首次报道了 γ-核心调节影响 PAF 对重要植物病原子囊菌的抗真菌谱和功效,并且合成的 γ-核心肽 Pγ opt是 PAF opt的衍生物,具有抗真菌活性。这些病原体在体外。最后,我们证明了 PAF 对番茄植株叶片灰葡萄孢感染的保护潜力。对哺乳动物细胞和植物幼苗没有任何毒性作用,以及对恶劣环境条件和蛋白水解降解的高度耐受性,进一步强化了我们对这些蛋白质和肽在农业中的应用的概念。
更新日期:2020-03-24
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