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相关概念视频

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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Conservative Site-specific Recombination and Phase Variation02:53

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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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CRISPR01:59

CRISPR

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Genome editing technologies allow scientists to modify an organism’s DNA via the addition, removal, or rearrangement of genetic material at specific genomic locations. These types of techniques could potentially be used to cure genetic disorders such as hemophilia and sickle cell anemia. One popular and widely used DNA-editing research tool that could lead to safe and effective cures for genetic disorders is the CRISPR-Cas9 system. CRISPR-Cas9 stands for Clustered Regularly Interspaced...
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Experimental RNAi02:15

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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...
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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.
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Updated: Jul 2, 2025

Enhanced Genome Editing with Cas9 Ribonucleoprotein in Diverse Cells and Organisms
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可编程RNA基编辑通过有针对性的修改.

Jinghui Song1, Yuan Zhuang1, Chengqi Yi2,3,4

  • 1State Key Laboratory of Protein and Plant Gene Research, School of Life Sciences, Peking University, Beijing, People's Republic of China.

Nature chemical biology
|February 28, 2024
PubMed
概括
此摘要是机器生成的。

基因编辑为遗传疾病提供临时的,可逆的疗法,避免永久的DNA损伤. 新兴的RNA编辑器,包括A-to-inosine,C-to-U和U-to-pseudouridine系统,显示出安全的治疗应用的希望.

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科学领域:

  • 生物技术是生物技术.
  • 分子生物学分子生物学
  • 基因工程是一种基因工程.

背景情况:

  • 克里斯普尔基因组编辑器具有强大的治疗潜力,但存在永久性目标外突变的风险.
  • 基因编辑器 (例如,细胞素,腺素) 纠正遗传错误,但永久的非目标编辑会带来重大风险.
  • RNA基编辑提供了一种暂时的,可逆的方法来纠正突变,而不会产生持久的基因毒性影响.

研究的目的:

  • 总结新兴的RNA基编辑器及其机制.
  • 审查可编程RNA向系统和效应蛋白.
  • 讨论RNA基编辑的技术进步,局限性和未来方向.

主要方法:

  • 审查有关RNA基编辑技术的当前文献.
  • 基于A-to-inosine,C-to-U和U-to-pseudouridine变化的RNA编辑系统的分析.
  • 检查可编程RNA向系统和修改基于酶的效应器.

主要成果:

  • 基于特定基基转换 (A-to-I,C-to-U,U-to-Ψ) 的新兴RNA编辑器正在开发中.
  • 可编程RNA向系统和效应蛋白是这些编辑器的关键组件.
  • 最近的技术突破已经提升了RNA基编辑的能力.

结论:

  • 由于其暂时性和可逆性,RNA基编辑是一个有前途的治疗策略.
  • 需要进一步的研究来克服局限性,并充分实现RNA基编辑工具的潜力.
  • 未来的方向包括完善编辑效率,特异性和临床应用的交付.