How CRISPR-AsCas12f1 Cleaves DNA
Author Information
Author(s): Song Xiaoxuan, Chen Ziting, Sun Wenjun, Yang Hao, Guo Lijuan, Zhao Yilin, Li Yanan, Ren Zhiyun, Shi Jin, Liu Cong, Ma Peixiang, Huang Xingxu, Ji Quanjiang, Sun Bo
Primary Institution: ShanghaiTech University
Hypothesis
How does AsCas12f1 couple DNA unwinding with its exonuclease activity during target cleavage?
Conclusion
AsCas12f1 cleaves DNA in a sequential manner, first unwinding the protospacer and then cleaving both the protospacer and out-of-protospacer regions.
Supporting Evidence
- AsCas12f1 creates three asymmetrical DNA breaks during cleavage.
- The study identifies a two-step DNA unwinding mechanism.
- Mg2+ is critical for coupling DNA unwinding and cleavage.
- Engineered AsCas12f1-v5.1 shows improved kinetics for protospacer DNA cleavage.
Takeaway
AsCas12f1 is like a pair of scissors that first untangles a string (DNA) before cutting it in specific places to help fix genes.
Methodology
The study used ensemble and single-molecule approaches to analyze the interactions of AsCas12f1 with DNA.
Limitations
The study primarily focuses on the biochemical mechanisms without extensive in vivo validation.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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