Modulation of peptidoglycan recognition protein expression alters begomovirus vectoring efficiency and fitness of Bemisia tabaci

IF 3.2 2区 农林科学 Q2 BIOCHEMISTRY & MOLECULAR BIOLOGY
Anupma Singh , Rakesh V , Yuvaraj Iyyappan , Amalendu Ghosh
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Abstract

Peptidoglycan recognition proteins (PGRPs) are evolutionarily conserved molecules. Their role in the immune response to invading pathogens makes them a natural target for viral defence study in a wide range of organisms. Silverleaf whitefly, Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) is one of the invasive insect pests and transmits begomoviruses in a circulative and persistent manner to vegetables, legumes, fibres and ornamentals. The virus entry, retention, circulation, and release process involve interactions with several proteins in B. tabaci and evade innate immunity to avoid the antiviral mechanisms. The present study investigated the role of BtPGRP in chilli leaf curl virus (ChiLCV, Begomovirus capsica) transmission by B. tabaci. Silencing of BtPGRP using double-stranded (ds) RNA led to the loss of innate immunity to ChiLCV resulting in increased virus titre in B. tabaci. DsBtPGRP was orally administered to adults of B. tabaci at a concentration of 1, 3, and 5 μg/mL. The expression of BtPGRP was downregulated up to 4.67-fold. The virus titre in B. tabaci increased 90.05 times post-exposure to dsBtPGRP at 5 μg/mL. The test plants inoculated with ChiLCV by dsBtPGRP-exposed B. tabaci expressed severe curling symptoms with a higher virus load and transmission ratio than the control. Besides, the silencing of BtPGRP also induced up to 56.67% mortality in treated B. tabaci. The active site pocket of BtPGRP was found to interact directly with the ChiLCV-CP in computational analyses. Key residues of BtPGRP, including Tyr45, Asp84, His86, Trp87, and Asn119 exhibited critical interactions with the ChiLCV-CP. To our knowledge, this is the first report on the effect of PGRP silencing on ChiLCV acquisition and transmission efficiency and fitness of B. tabaci Asia II I.

Abstract Image

调节肽聚糖识别蛋白的表达改变烟粉虱begomvirus的载体效率和适应性。
肽聚糖识别蛋白(PGRPs)是进化上保守的分子。它们在对入侵病原体的免疫反应中的作用使它们成为广泛生物体中病毒防御研究的天然目标。银叶粉虱(Gennadius)(半翅目:粉虱科)是一种入侵害虫,以循环和持久的方式传播begomovirus到蔬菜、豆类、纤维和观赏植物上。病毒的进入、滞留、循环和释放过程涉及与烟粉虱体内几种蛋白质的相互作用,并逃避先天免疫以避免抗病毒机制。本研究探讨了BtPGRP在辣椒卷叶病毒(ChiLCV, begomvirus辣椒)经烟粉虱传播中的作用。使用双链(ds) RNA沉默BtPGRP导致对ChiLCV的先天免疫丧失,导致烟粉虱病毒滴度增加。dsBtPGRP分别以1、3、5 ug/mL的浓度口服烟粉虱成虫。BtPGRP表达下调4.67倍。5 μg/mL浓度的dsBtPGRP使烟粉虱体内的病毒滴度升高90.05倍。用dsbtpgrp暴露的烟粉虱接种ChiLCV的试验植株表现出严重的卷曲症状,病毒载量和传播率均高于对照。此外,BtPGRP基因沉默处理后的烟粉虱死亡率高达56.67%。在计算分析中发现BtPGRP的活性位点口袋与ChiLCV-CP直接相互作用。BtPGRP的关键残基包括Tyr45、Asp84、His86、Trp87和Asn119与ChiLCV-CP表现出关键的相互作用。据我们所知,这是首次报道PGRP沉默对亚洲烟粉虱获得和传播ChiLCV及其适应度的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
7.40
自引率
5.30%
发文量
105
审稿时长
40 days
期刊介绍: This international journal publishes original contributions and mini-reviews in the fields of insect biochemistry and insect molecular biology. Main areas of interest are neurochemistry, hormone and pheromone biochemistry, enzymes and metabolism, hormone action and gene regulation, gene characterization and structure, pharmacology, immunology and cell and tissue culture. Papers on the biochemistry and molecular biology of other groups of arthropods are published if of general interest to the readership. Technique papers will be considered for publication if they significantly advance the field of insect biochemistry and molecular biology in the opinion of the Editors and Editorial Board.
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