蜘蛛神经毒素PPTX-04的杀虫活性通过调节昆虫电压门的通道
Kan Wang1, Yangyang Yan1, Lixin Huang2
1Key laboratory of Integrated Management of Crop Diseases and Pests (Ministry of Education), College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China.
Pesticide biochemistry and physiology
|April 30, 2024
概括
一种新的蜘蛛神经毒素,PPTX-04,有效地向像尼拉帕尔瓦塔 (Nilaparvata lugens) 这样的昆虫害虫. 它作用于昆虫道的特定部位,为管理抗虫剂耐药性提供了一种新的策略.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 昆虫学 昆虫学是一门学科.
背景情况:
- 蜘蛛产生的类神经毒素经常准离子通道.
- 昆虫害虫对农业构成重大威胁,需要新的控制策略.
研究的目的:
- 描述PPTX-04的杀虫活性和分子机制,这是一种来自Pardosa pseudoannulata的新型神经毒素.
- 调查PPTX-04作为一种管理抗虫剂耐药性的工具的潜力.
主要方法:
- 描述PPTX-04对尼拉帕尔瓦塔虫的毒性.
- 对PPTX-04对Nilaparvata lugens电压通通道 (NlNav1) 的作用的电生理学分析,表达在Xenopus卵细胞中.
- 对NlNav1的局部定向突变发生,以确定毒素的结合部位.
- 分子对接模拟用于预测PPTX-04.4的结合口袋.
主要成果:
- PPTX-04对Nilaparvata lugens具有很高的毒性,无论对埃托芬普洛克斯的耐药性如何.
- PPTX-04延长了NlNav1通道的开放,并诱导了与甲状腺机制不同的尾流.
- 在NlNav1的细胞外位点4的突变显著降低了PPTX-04的功效,表明该位点对结合至关重要.
- 分子对接支持PPTX-04在一个涉及4位点的口袋内结合.
结论:
- PPTX-04具有强大的杀虫活性,通过准昆虫电压门的通道上的独特位置.
- PPTX-04代表了一种有前途的新资源,用于控制昆虫害虫和管理甲状腺耐药性.
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