昆虫双链RNA结合蛋白:结构,功能和RNAi效率
1Instytut Biologii, Uniwersytet Opolski, Oleska 22, 45-052 Opole, Poland.
Journal of insect physiology
|November 19, 2025
概括
双链RNA结合蛋白 (dsRBPs) 是昆虫RNA干扰 (RNAi) 效率和传播的关键. 昆虫种群中dsrbp的差异解释了可变RNAi反应,影响了害虫管理策略.
科学领域:
- 分子生物学分子生物学
- 昆虫学 昆虫学是一门学科.
- 遗传学 是一个遗传学.
背景情况:
- 双链RNA结合蛋白 (dsRBPs) 对昆虫RNA干扰 (RNAi) 途径至关重要.
- 它们稳定和处理双链RNA (dsRNA),并引导小RNA进入效应器复合体.
- 像Dicer和Argonaute这样的蛋白质形成了核心,而dsRBPs (例如R2D2,Loquacious,Staufen,StaufenC) 调节RNAi的效率,特异性和系统传播.
研究的目的:
- 为了比较dsrbps在不同昆虫种群中的存在,表达和功能专业化 (Diptera,Coleoptera,Lepidoptera,Hemiptera).
- 为了将dsrbp变异与昆虫特异性RNAi响应能力和系统性沉默相关联.
- 探索dsrbps作为生物标志物的应用潜力,以加强基于RNAi的害虫管理.
主要方法:
- 在昆虫种群中对dsRBP存在,表达和功能专业化的比较分析.
- 对dSRBP在Dicer介导加工和RISC组装中的作用进行结构和生化研究的审查.
- 检查口服RNAi中的STAUFENC等谱系特定的dsRBPs的新兴证据.
主要成果:
- 在昆虫种群中,dsrbp谱和表达水平存在显著差异,影响RNAi结果.
- 类动物表现出强大的系统性RNAi由于高dsrbp表达,不像类动物和半类动物具有受限制的dsrbp活动和有限的系统运输.
- dsRBPs在Dicer处理和RISC组装中起到特定的作用,其异构和相互作用影响RNAi.
- 像StaufenC这样的血统特定蛋白质在某些昆虫中增强了口腔RNAi.
结论:
- 在dsrbp组成和功能的变化是差异性RNAi在昆虫种群中的有效性的主要驱动因素.
- 了解dsrbp的作用,可以了解RNAi变异性的分子基础.
- dsRBPs是优化宿主诱导和喷雾诱导基因沉默策略的有价值的目标和生物标志物.
相关概念视频
01:23RNA Interference
27.7K
RNA interference (RNAi) is a process in which a small non-coding RNA molecule blocks the post-transcriptional expression of a gene by binding to its messenger RNA (mRNA) and preventing the protein from being translated.
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
27.7K
02:15Experimental RNAi
7.2K
RNA interference (RNAi) is a cellular mechanism that inhibits gene expression by suppressing its transcription or activating the RNA degradation process. The mechanism was discovered by Andrew Fire and Craig Mello in 1998 in plants. Today, it is observed in almost all eukaryotes, including protozoa, flies, nematodes, insects, parasites, and mammals. This precise cellular mechanism of gene silencing has been developed into a technique that provides an efficient way to identify and determine the...
7.2K
02:30siRNA - Small Interfering RNAs
18.3K
Small interfering RNAs, or siRNAs, are short regulatory RNA molecules that can silence genes post-transcriptionally, as well as the transcriptional level in some cases. siRNAs are important for protecting cells against viral infections and silencing transposable genetic elements.
In the cytoplasm, siRNA is processed from a double-stranded RNA, which comes from either endogenous DNA transcription or exogenous sources like a virus. This double-stranded RNA is then cleaved by the...
In the cytoplasm, siRNA is processed from a double-stranded RNA, which comes from either endogenous DNA transcription or exogenous sources like a virus. This double-stranded RNA is then cleaved by the...
18.3K
02:57piRNA - Piwi-interacting RNAs
7.5K
PIWI-interacting RNAs, or piRNAs, are the most abundant short non-coding RNAs. More than 20,000 genes have been found in humans that code for piRNAs while only 2000 genes have been found for miRNAs. piRNAs can act at the transcriptional and post-transcriptional levels and have a vital role in silencing transposable elements present in germ cells. They are also involved in epigenetic silencing and activation. Previously, they were thought to function only in germ cells but new evidence suggests...
7.5K
01:23Types of RNA
72.4K
Overview
Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in the regulation of gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA...
Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in the regulation of gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA...
72.4K
01:20Types of RNA
8.9K
Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in regulating gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA Performs Diverse...
RNA Performs Diverse...
8.9K