开发基于小分子的传感器的战略,当它们与特定的RNA结合时,它们会强烈光
Brian A Sparano1, Kazunori Koide
1Department of Chemistry, University of Pittsburgh, Pennsylvania 15260, USA.
Journal of the American Chemical Society
|October 27, 2005
概括
研究人员开发了一种创建小分子RNA传感器的新方法. 这种光诱导电子转移 (PET) 传感器使用RNA吸收体来增强光,从而能够敏感地检测RNA分子.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 化学生物学 化学生物学
背景情况:
- 开发敏感和特定的RNA检测方法对于分子生物学和诊断至关重要.
- 现有的RNA传感器通常面临模块化和广泛应用的局限性.
- 光诱导电子转移 (PET) 传感器由于其可调节性质,为分子传感提供了一个有前途的平台.
研究的目的:
- 建立一个广泛适用的战略,用于创建基于小分子的RNA传感器.
- 为了证明RNA-aptamer介导信号放大在PET传感器中的实用性.
- 为RNA化学传感器设计开发一个模块化平台.
主要方法:
- 一种光诱导电子转移 (PET) 传感器的设计,该传感器包含光素衍生物 (光) 和氨酸衍生物 (电子捐赠器/灭器).
- 通过体外选择 (SELEX) 来分离特定于电子捐赠者的RNA胺体.
- 传感器在RNA胺酶结合时的光反应的表征.
主要成果:
- 开发的PET传感器显示,在选择的RNA吸收酶结合时,光强度显著增加 (13倍).
- 该RNA吸收酶特别识别并与传感器的电子捐赠元件结合.
- 结果验证了使用RNA-电子供体相互作用来激活传感器的概念.
结论:
- 一种广泛适用于开发基于小分子的RNA传感器的方法已经成功证明.
- 可以有效地使用RNA吸附体来调节PET传感器的光输出,从而实现敏感的RNA检测.
- 这项工作突出了模块化RNA化学传感器在各种生物和诊断应用中的潜力.
相关概念视频
Types of RNA
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...
Riboswitches
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...
Labeling DNA Probes
DNA probes are fragments of DNA labeled with a reporter tag to enable their detection or purification. The resulting labeled DNA probes can then hybridize to target nucleic acid sequences through complementary base-pairing, and may be used to recover or identify these regions.
Radioisotopes, fluorophores, or small molecule binding partners like biotin or digoxigenin, are the most widely used reporter tags for labeling DNA probes. These labels can be attached to the probe DNA molecule via...
Radioisotopes, fluorophores, or small molecule binding partners like biotin or digoxigenin, are the most widely used reporter tags for labeling DNA probes. These labels can be attached to the probe DNA molecule via...
RNA-seq
RNA sequencing, or RNA-Seq, is a high-throughput sequencing technology used to study the transcriptome of a cell. Transcriptomics helps to interpret the functional elements of a genome and identify the molecular constituents of an organism. Additionally, it also helps in understanding the development of an organism and the occurrence of diseases.
Before the discovery of RNA-seq, microarray-based methods and Sanger sequencing were used for transcriptome analysis. However, while microarray-based...
Before the discovery of RNA-seq, microarray-based methods and Sanger sequencing were used for transcriptome analysis. However, while microarray-based...
Reporter Genes
Reporter genes are a type of protein-coding gene that are often tagged to a gene of interest. Once inside a target cell, reporter genes usually produce visually identifiable characteristics like fluorescence and luminescence when expressed along with the gene of interest. Thus, reporter genes “report” the presence or absence of genes of interest in an organism, determine the gene expression pattern, or track the physical location of a DNA segment or protein in the cell.
Commonly used reporter...
Commonly used reporter...
Translational Regulation
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,...


