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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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CRISPR/Cas9 Genome Editing01:28

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The CRISPR-Cas system serves as a bacterial defense mechanism against invading genetic elements such as viruses and plasmids, forming the foundation for its adaptation as a powerful genome-editing tool. Originally discovered in prokaryotes, this system has been repurposed to revolutionize genetic engineering across a wide range of organisms, including plants, animals, and humans. The core component, Cas9, is an endonuclease derived from Streptococcus pyogenes, capable of introducing...
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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...
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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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C2c2是一个单组件可编程的RNA指导的RNA向CRISPR效应器

Omar O Abudayyeh1, Jonathan S Gootenberg2, Silvana Konermann3

  • 1Department of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA. McGovern Institute for Brain Research at MIT, Cambridge, MA 02139, USA. Departments of Brain and Cognitive Science and Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.

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概括

研究人员描述了C2c2CRISPR-Cas效应体,一种新的RNA导向核糖酶. 这种来自Leptotrichia shahii的系统准并分裂特定的RNA分子,提供新的RNA准工具.

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科学领域:

  • 微生物学
  • 分子生物学
  • 生物化学

背景情况:

  • 集群定期间隔的短平行复制 (CRISPR) - 与CRISPR相关的基因 (Cas) 系统在微生物中提供了适应性免疫力.
  • 克里斯普尔-卡斯系统通过DNA或RNA-DNA干扰来对抗外来遗传元素.
  • 2类CRISPR-Cas效应器代表了这些微生物防御机制的不同类别.

研究的目的:

  • 描述第2类VI型的CRISPR-Cas效应器,C2c2.
  • 为了证明C2c2的RNA导向核糖酶活性.
  • 探索C2c2作为一种新的RNA向工具的潜力.

主要方法:

  • 来自Leptotrichia shahii的C2c2的生物化学分析.
  • 在体外测试以评估RNA分裂活性.
  • 保存的高级真核细胞和原核细胞核结 (HEPN) 域的突变.

主要成果:

  • C2c2表现出RNA引导的核糖酶活性,向单链RNA.
  • 在细菌中,C2c2对RNA菌体进行干扰.
  • 在细菌中通过编程C2c2实现了特定的mRNA淘汰.
  • 催化活性取决于HEPN域内保存的残留物.

结论:

  • C2c2是一种多功能RNA导向核糖酶,在RNA向中具有潜在的应用.
  • 了解C2c2可以扩大CRISPR-Cas系统的多样性和功能.
  • C2c2可以被设计成用于RNA操纵的新工具.