通过生物直角化学来对RNA功能进行时空空间控制,以实现可激活的生物传感
Yining Liu1, Linlin Yang1, Miao Zhang1
1State Key Laboratory of Chemo and Bio-Sensing, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China.
Analytical chemistry
|September 26, 2025
概括
研究人员开发了一种新的RNA激活策略,使用跨环氧 octene (TCO) 中的RNA和四素 (TZ) 进行精确的时空控制. 这使得先进的RNA生物传感和基因疗法应用具有减少的背景信号.
科学领域:
- 生物化学 生化学
- 分子生物学分子生物学
- 化学生物学 化学生物学
背景情况:
- 对RNA功能的时空控制对于基于RNA的生物感知和治疗学至关重要.
- 现有的方法在实现精确的时间和空间RNA激活方面面临挑战.
研究的目的:
- 为精确的时空控制开发一种生物正向可激活的RNA策略.
- 为了证明这种策略在活细胞成像和基因表达调节中的应用.
主要方法:
- 通过反电子需求迪尔斯-阿尔德尔 (IEDDA) 反应通过四素 (TZ) 激活的利用过环环子 octene (TCO) 中的RNA.
- 在Zn2+成像的8-17DNA酶内特定地修改RNA.
- 修改的sgRNA用于控制CRISPR/dCas9转录系统.
主要成果:
- 在活细胞中实现了DNA酶传感器的时空激活,用于精确的Zn2+成像.
- 在细胞外环境中传输时,尽量减少背景信号泄漏.
- 通过CRISPR/dCas9控制证明了光蛋白的按需表达.
结论:
- 基于TCO的RNA策略为基于RNA的元素的时空控制提供了一个多功能平台.
- 这种方法对精确的生物成像,疾病诊断和基因治疗具有重大潜力.
相关概念视频
Types of RNA
72.5K
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...
72.5K
Types of RNA
9.1K
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...
9.1K
Riboswitches
9.6K
Riboswitches are non-coding mRNA domains that regulate the transcription and translation of downstream genes without the help of proteins. Riboswitches bind directly to a metabolite and can form unique stem-loop or hairpin structures in response to the amount of the metabolite present. They have two distinct regions – a metabolite-binding aptamer and an expression platform.
The aptamer has high specificity for a particular metabolite which allows riboswitches to specifically regulate...
The aptamer has high specificity for a particular metabolite which allows riboswitches to specifically regulate...
9.6K
Translational Regulation
535
Translational regulation in prokaryotes ensures efficient protein synthesis by controlling ribosome access to mRNA. This regulation is mediated by secondary RNA structures, including translational riboswitches, RNA thermometers, and small RNAs (sRNAs), which respond to intracellular and environmental signals to modulate gene expression.Translational RiboswitchesRiboswitches in the leader region of mRNAs can regulate translation by altering the accessibility of the Shine-Dalgarno (SD) sequence,...
535
Experimental RNAi
7.3K
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...
7.3K
Transcriptional Regulation: Riboswitches
588
Riboswitches are RNA elements that regulate gene expression by altering their secondary structures in response to specific effector molecules. These elements, located in the leader regions of certain mRNAs, act as transcriptional regulators by toggling between alternative conformations to control downstream gene expression. Riboswitch-mediated regulation is a precise mechanism for modulating biosynthetic pathways, as exemplified by the riboflavin biosynthesis pathway in Bacillus...
588


