相关实验视频
Updated: Jul 8, 2025

11:53
Substrate Generation for Endonucleases of CRISPR/Cas Systems
Published on: September 8, 2012
27.4K
在Cas4-缺少Crispr系统中解开外源DNA处理:探索了一种新型绕道途径
Xinming Su1,2, Xiaoyu Jin1,2, Zehua Wang1,2
1Key Laboratory of Novel Targets and Drug Study for Neural Repair of Zhejiang Province, School of Medicine, Hangzhou City University, Hangzhou, Zhejiang, 310000, China.
Advanced biology
|December 10, 2023
概括
集群定期间隔的短平行体重复 (CRISPR) 系统使用适应性免疫的替代途径. 一个新的模型揭示了DnaQ样外核酶 (DEDDh) 在Cas4缺陷的CRISPR系统中如何处理DNA.
科学领域:
- 微生物学 微生物学
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- 克里斯普尔-卡斯系统为 prokaryotes 提供了对外来遗传元素的适应性免疫力.
- 适应阶段,涉及外源DNA处理,仍然不完全理解.
- 众所周知,Cas4蛋白可以处理原体空间邻基因 (PAM) 序列,但存在其他替代机制.
研究的目的:
- 检查CRISPR适应性免疫的基本过程,包括经典和替代途径.
- 评估Cas4缺陷型I-E CRISPR系统中外源DNA处理的新型模型.
- 为了阐明CRISPR适应性免疫的演变.
主要方法:
- 审查关于CRISPR-Cas适应机制的现有文献.
- 分析了王等人提出的新型模型. 在Cas4缺陷系统中用于DNA处理.
- 对Cas4介导和DEDDh介导路径进行了全面的检查.
主要成果:
- 一个新型模型将原始空间处理集成到CRISPR数组中,通过Cas4-缺乏系统中的DEDDh和Cas1-Cas2复合体.
- 这种替代途径突显了CRISPR免疫力的适应性和演变.
- 该研究详细介绍了拟议模型的优点,弱点和挑战.
结论:
- 克里斯普尔适应性免疫涉及对外基因DNA处理的多种机制.
- DEDDh介导的途径为Cas4依赖性处理提供了替代方案,扩大了我们对CRISPR进化的理解.
- 需要进一步的研究来充分阐明这些途径的复杂性及其影响.
更多相关视频
相关概念视频
CRISPR
51.6K
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...
51.6K
CRISPR and crRNAs
17.0K
Bacteria and archaea are susceptible to viral infections just like eukaryotes; therefore, they have developed a unique adaptive immune system to protect themselves. Clustered regularly interspaced short palindromic repeats and CRISPR-associated proteins (CRISPR-Cas) are present in more than 45% of known bacteria and 90% of known archaea.
The CRISPR-Cas system stores a copy of foreign DNA in the host genome and uses it to identify the foreign DNA upon reinfection. CRISPR-Cas has three different...
The CRISPR-Cas system stores a copy of foreign DNA in the host genome and uses it to identify the foreign DNA upon reinfection. CRISPR-Cas has three different...
17.0K
Homologous Recombination
50.6K
The basic reaction of homologous recombination (HR) involves two chromatids that contain DNA sequences sharing a significant stretch of identity. One of these sequences uses a strand from another as a template to synthesize DNA in an enzyme-catalyzed reaction. The final product is a novel amalgamation of the two substrates. To ensure an accurate recombination of sequences, HR is restricted to the S and G2 phases of the cell cycle. At these stages, the DNA has been replicated already and the...
50.6K
Conservative Site-specific Recombination and Phase Variation
6.0K
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...
The recognition sites for Cre recombinase called LoxP...
6.0K

