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相关概念视频

Conservative Site-specific Recombination and Phase Variation02:53

Conservative Site-specific Recombination and Phase Variation

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Because the DNA segments are cut and reorganized in a direction-specific manner, site-specific recombination has emerged as an efficient genetic engineering technique. Flippase and Cyclization recombinases or Flp and Cre, respectively, are two members of the tyrosine recombinase family derived from bacteriophages, that are used to mediate site-specific DNA insertions, deletions, and targeted expression of proteins in mammalian cell lines.
The recognition sites for Cre recombinase called LoxP...
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RNA Editing02:23

RNA Editing

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RNA editing is a post-transcriptional modification where a precursor mRNA (pre-mRNA) nucleotide sequence is changed by base insertion, deletion, or modification. The extent of RNA editing varies from a few hundred bases, in mitochondrial DNA of trypanosomes, to a just single base, in nuclear genes of mammals. Even a single base change in the pre-mRNA can convert a codon for one amino acid into the codon for another amino acid or a stop codon. This type of re-coding can significantly affect the...
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Riboswitches01:56

Riboswitches

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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...
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Types of RNA01:20

Types of RNA

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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...
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Types of RNA01:23

Types of RNA

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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...
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RNA Interference01:23

RNA Interference

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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...
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相关实验视频

Updated: Jan 12, 2026

DNA-Tethered RNA Polymerase for Programmable In vitro Transcription and Molecular Computation
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DNA-Tethered RNA Polymerase for Programmable In vitro Transcription and Molecular Computation

Published on: December 29, 2021

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通过可编程的DNA-小分子结合物进行站点选择性RNA修饰.

Tuan-Khoa Kha1, Tingyao Zhang1, Nikita Kunchur1

  • 1Department of Chemistry, Faculty of Science, National University of Singapore, 4 Science Drive 2, Singapore, 117544, Singapore.

Angewandte Chemie (International ed. in English)
|October 31, 2025
PubMed
概括

这项研究引入了一种新的DNA-DMAP结合物用于局部选择性RNA化,为酶提供了一个更小,更可编程的替代方案. 这种方法可以为研究和治疗应用提供高效的RNA修饰.

关键词:
乙基化转化是指一个过程.这就是DNA-DMAP.这是一个RNARNARNARNARNA.站点选择性修改的修改.

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Sequence-specific and Selective Recognition of Double-stranded RNAs over Single-stranded RNAs by Chemically Modified Peptide Nucleic Acids
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Sequence-specific and Selective Recognition of Double-stranded RNAs over Single-stranded RNAs by Chemically Modified Peptide Nucleic Acids

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DNAzyme-dependent Analysis of rRNA 2’-O-Methylation
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DNAzyme-dependent Analysis of rRNA 2’-O-Methylation

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DNA-Tethered RNA Polymerase for Programmable In vitro Transcription and Molecular Computation
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Sequence-specific and Selective Recognition of Double-stranded RNAs over Single-stranded RNAs by Chemically Modified Peptide Nucleic Acids
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DNAzyme-dependent Analysis of rRNA 2’-O-Methylation
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DNAzyme-dependent Analysis of rRNA 2’-O-Methylation

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科学领域:

  • 化学生物学 化学生物学
  • 在RNA疗法方面.
  • 分子生物学分子生物学

背景情况:

  • 选择性RNA修饰对于RNA生物学研究和开发RNA疗法至关重要.
  • 使用酶或核酶的现有方法具有诸如序列偏差和复杂生产等局限性.

研究的目的:

  • 开发一种新的,可编程的,强大的局部选择性RNA化策略.
  • 克服目前基于酶或 рибо酶的RNA修饰技术的局限性.

主要方法:

  • 一种DNA-DMAP (4-dimethylaminopyridine) 结合物被设计成可以与目标RNA混合.
  • 结合物催化了从五甲 (PFP) 向RNA2'-OH组的转移.
  • 含有亚酸的基捐赠体促进了随后的点击化学功能化.

主要成果:

  • 该DNA-DMAP结合物使得具有高转换率和快速速度的局部选择性RNA酸化成为可能.
  • 该策略适用于各种RNA类型,包括合成RNA,5SrRNA和mRNA.
  • 可编程的DNA序列允许精确控制化部位.

结论:

  • 这种DNA-DMAP合策略为体外RNA标记和功能化提供了一个多功能平台.
  • 与酶方法相比,它提供了更好的可编程性,合理的设计和稳定性.
  • 这种方法促进了RNA生物学的进步和基于RNA的治疗方法的开发.