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Impact of an Antifungal Insect Defensin on the Proteome of the Phytopathogenic Fungus Botrytis cinerea.
Journal of Proteome Research ( IF 3.8 ) Pub Date : 2020-02-03 , DOI: 10.1021/acs.jproteome.9b00638
Thomas Aumer 1 , Sébastien N Voisin 2 , Thomas Knobloch 3 , Céline Landon 4 , Philippe Bulet 1, 2
Affiliation  

ETD151, an analogue of the antifungal insect defensin heliomicin, is an antifungal peptide active against yeasts and filamentous fungi. To decipher the mechanisms underlying its molecular action on the phytopathogenic fungus Botrytis cinerea, a necrotrophic pathogen responsible for gray mold disease, we investigated the changes in 3 day-old mycelia upon treatment with different concentrations of ETD151. Optical and fluorescence microscopies were used prior to establishing the peptide/protein profiles through two mass spectrometry approaches: MALDI profiling, to generate molecular mass fingerprints as peptide signatures, and a gel-free bottom-up proteomics approach. Our results show that a concentration of ETD151 above the half-maximal inhibitory concentration can alter the integrity of the mycelial structure of B. cinerea. Furthermore, reproducible modifications of the peptide/protein composition were demonstrated in the presence of ETD151 within a 1500-16,000 mass (m/z) range. After the robustness of LC-ESI-MS/MS analysis on B. cinerea mycelial extracts was confirmed, our analyses highlighted 340 significantly modulated proteins upon treatment with ETD151 within a 4.8-466 kDa mass range. Finally, data mapping on KEGG pathways revealed the molecular impact of ETD151 on at least six pathways, namely, spliceosome, ribosome, protein processing in endoplasmic reticulum, endocytosis, MAPK signaling pathway, and oxidative phosphorylation.

中文翻译:

抗真菌昆虫防御素对植物致病真菌灰葡萄孢菌蛋白质组的影响。

ETD151是抗真菌昆虫防御素heliomicin的类似物,是一种对酵母和丝状真菌具有活性的抗真菌肽。为了解释其对植物病原性真菌灰葡萄孢(Botrytis cinerea)的分子作用的机制,灰霉病是引起灰霉病的坏死性病原体,我们研究了用不同浓度的ETD151处理后3天大的菌丝体的变化。在通过两种质谱方法建立肽/蛋白质谱之前,使用了光学和荧光显微镜检查:MALDI分析,以生成作为肽标记的分子质量指纹,以及无凝胶的自下而上的蛋白质组学方法。我们的结果表明,高于最大抑制浓度一半的ETD151浓度可以改变灰葡萄双歧杆菌菌丝体结构的完整性。此外,在1500-16,000质量(m / z)范围内的ETD151存在下,肽/蛋白质组成的可再现修饰得到了证明。在确认了灰葡萄孢菌丝体提取物的LC-ESI-MS / MS分析的稳健性之后,我们的分析突出显示了在4.8-466 kDa质量范围内用ETD151处理后有340种显着调节的蛋白质。最后,关于KEGG途径的数据作图揭示了ETD151至少对六个途径的分子影响,即剪接体,核糖体,内质网中的蛋白质加工,内吞作用,MAPK信号传导途径和氧化磷酸化。我们的分析突出显示了在4.8-466 kDa质量范围内用ETD151处理后,有340种显着调节的蛋白质。最后,关于KEGG途径的数据作图揭示了ETD151至少对六个途径的分子影响,即剪接体,核糖体,内质网中的蛋白质加工,内吞作用,MAPK信号传导途径和氧化磷酸化。我们的分析突出显示了在4.8-466 kDa质量范围内用ETD151处理后,有340种显着调节的蛋白质。最后,关于KEGG途径的数据作图揭示了ETD151至少对六个途径的分子影响,即剪接体,核糖体,内质网中的蛋白质加工,内吞作用,MAPK信号传导途径和氧化磷酸化。
更新日期:2020-02-03
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