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Efficient Transcriptional Gene Repression by Type V-A CRISPR-Cpf1 from Eubacterium eligens
Seong Keun Kim1,2, Haseong Kim1,2, Woo-Chan Ahn3
1Synthetic Biology and Bioengineering Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB) , Daejeon 34141, Republic of Korea.
ACS Synthetic Biology
|April 5, 2017
Summary
This study introduces a new gene regulation tool using EedCpf1 for Clustered Regularly Interspaced Short Palindromic Repeats interference (CRISPRi). EedCpf1 offers efficient gene repression, guiding future CRISPRi genetic control applications.
Area of Science:
- Molecular Biology
- Gene Regulation
- Biotechnology
Background:
- Clustered Regularly Interspaced Short Palindromic Repeats interference (CRISPRi) is a key technology for artificial gene regulation.
- Type II CRISPR-Cas9 systems are commonly used for CRISPRi, but novel systems are being explored.
Purpose of the Study:
- To develop and characterize a type V-A CRISPR-Cas endonuclease Cpf1-based CRISPRi system.
- To compare the gene repression efficiency of EedCpf1 with SpdCas9.
Main Methods:
- Constructed an l-rhamnose-inducible CRISPRi system using DNase-deactivated EedCpf1 from Eubacterium eligens.
- Compared EedCpf1 performance against catalytically deactivated SpdCas9 from Streptococcus pyogenes.
- Investigated strand bias, protospacer adjacent motif (PAM) preference, and multiplex repression capabilities.
Main Results:
- EedCpf1 demonstrated stronger gene repression on the template strand compared to SpdCas9.
- EedCpf1 showed no strand bias when targeting promoters and preferred the 5'-TTTV-3' PAM.
- Multiplex repression was successfully demonstrated with both episomal and chromosomal targets.
Conclusions:
- The EedCpf1-based CRISPRi system provides an effective alternative for gene regulation.
- Findings offer guidance for efficient EedCpf1-mediated CRISPRi genetic control.
- This work expands the toolkit for precise gene manipulation using CRISPR technology.