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相关概念视频

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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Reporter Genes02:11

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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.
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相关实验视频

Updated: Jul 4, 2025

Using a Fluorescent PCR-capillary Gel Electrophoresis Technique to Genotype CRISPR/Cas9-mediated Knockout Mutants in a High-throughput Format
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Using a Fluorescent PCR-capillary Gel Electrophoresis Technique to Genotype CRISPR/Cas9-mediated Knockout Mutants in a High-throughput Format

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化CRISPR用于基因组DNA成像

Zhongxuan Zhang1,2,3,4, Xiaoxiao Rong1,5, Tianjin Xie1,6

  • 1Beijing Institute of Life Sciences, Chinese Academy of Science, 100101, Beijing, China.

Nature communications
|January 31, 2024
PubMed
概括
此摘要是机器生成的。

化CRISPR (fCRISPR) 能够在活细胞中对基因组DNA进行高对比成像. 这种新的CRISPR工具克服了背景噪声,允许对染色体动态和DNA修复实时进行敏感跟踪.

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科学领域:

  • 分子生物学分子生物学
  • 遗传学 是一个遗传学.
  • 细胞生物学 细胞生物学

背景情况:

  • 基因组DNA在核动力学,结构和功能方面显示出显著的异质性.
  • 基于CRISPR的成像允许可视化活细胞中的基因组位置.
  • 传统的CRISPR工具由于构成性光蛋白表达而受到高背景和非特异信号的影响.

研究的目的:

  • 开发一种基于CRISPR的新型成像工具,其信号噪声比和灵敏度得到了改进.
  • 克服现有的CRISPR成像技术的局限性,例如高背景和非特异信号.
  • 为了实现基因组DNA动态和修复过程的高对比度,实时成像.

主要方法:

  • 使用dCas9构建化CRISPR (fCRISPR),一种工程化sgRNA和一种化蛋白.
  • 将RNA发针纳入sgRNA,在结合时触发原蛋白激活.
  • 形成dCas9:sgRNA:用于向DNA成像的化蛋白三元复合体.

主要成果:

  • fCRISPR实现了高信号噪声比和灵敏度,用于对人类细胞中多样化的基因组DNA进行成像.
  • 该系统成功地跟踪了染色体动态和长度.
  • 通过fCRISPR,可以实时监测DNA双链断裂 (DSB) 和其修复.

结论:

  • fCRISPR提供了一个高对比度和敏感的平台,用于成像活细胞中的基因组位置.
  • 这项技术克服了传统CRISPR成像的局限性,提供了更高的特异性和更少的背景.
  • fCRISPR促进了对染色体动力学和DNA修复机制的先进研究.