克里斯普尔混合:一种克里斯普尔介导的细胞内定向进化平台,用于RNA适应体
Qiwen Su-Tobon1, Jiayi Fan1, Michael Goldstein1
1Department of Chemistry, Boston College, Chestnut Hill, MA, USA.
Nature communications
|January 11, 2025
概括
研究人员开发了一种新的CRISPR系统,以进化RNA吸收体,以精确调节基因. 这种方法使哺乳动物细胞中的多个基因能够同时激活和抑制,使用正交的阿普坦-RNA结合蛋白对.
科学领域:
- 分子生物学分子生物学
- 基因编辑技术的技术
- 合成生物学 合成生物学
背景情况:
- 克里斯普技术为基因功能研究和操纵提供了强大的工具.
- 与CRISPR的单导向RNA (sgRNA) 融合的RNA体可以将RNA结合蛋白 (RBPs) 招募到特定的基因组位置.
- 多重复合基因调节可以通过表达各种RNA体的sgRNA来实现.
研究的目的:
- 开发一种细胞内定向进化平台,用于向细胞内表达RBP的RNA吸收体.
- 为了识别与现有的aptamer-RBP对正交的高亲和度RNA吸收酶.
- 为了证明这些直角的阿普坦-RBP对在多重CRISPR系统中的应用,用于哺乳动物细胞的同时基因调节.
主要方法:
- 优化一个与光激活细胞分类 (FACS) 集成的细菌CRISPR混合系统.
- 细胞内导向进化为选择高亲和度RNA体.
- 对已知的aptamer-RBP相互作用的aptamer正交度的验证.
- 在多重CRISPR系统中用于转录激活和抑制的应用.
主要成果:
- 通过定向进化平台成功识别了高亲和度RNA吸收体.
- 证明了新发现的体对现有的体-RBP对的正交性.
- 在哺乳动物细胞中有效的同时转录激活和抑制内源基因,使用多重CRISPR与正交的阿普坦-RBP对.
结论:
- 开发的细胞内定向进化平台有效地产生正交的RNA吸收体.
- 多重复合的CRISPR系统利用直角的阿普坦-RBP对,可以精确并同时控制多个内源基因.
- 这项技术提升了基于CRISPR的基因调控能力,用于研究和潜在的治疗应用.
相关概念视频
CRISPR and crRNAs
16.6K
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...
16.6K
CRISPR
49.3K
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...
49.3K
Conservative Site-specific Recombination and Phase Variation
5.9K
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...
5.9K
RNA Editing
8.9K
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...
8.9K
Experimental RNAi
6.0K
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...
6.0K


