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Updated: Mar 3, 2026
06:48
CRISPR Guide RNA Cloning for Mammalian Systems
Published on: October 2, 2018
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Structural Basis for Guide RNA Processing and Seed-Dependent DNA Targeting by CRISPR-Cas12a.
Daan C Swarts1, John van der Oost2, Martin Jinek1
1Department of Biochemistry, University of Zurich, CH-8057 Zurich, Switzerland.
Molecular Cell
|April 22, 2017
Summary
The CRISPR-Cas12a (Cpf1) enzyme has two nuclease activities crucial for genome editing. Structural studies reveal how Cas12a processes guide RNAs and cleaves target DNA, advancing gene editing technology.
Area of Science:
- Molecular Biology
- Biochemistry
- Structural Biology
Background:
- CRISPR-associated protein Cas12a (Cpf1) is a versatile tool in genome editing.
- Cas12a exhibits distinct endoribonuclease and RNA-guided DNase activities.
Purpose of the Study:
- To elucidate the molecular mechanisms underlying Cas12a's dual nuclease activities.
- To understand guide RNA processing and target DNA binding/cleavage.
Main Methods:
- Determined crystal structures of Francisella novicida Cas12a.
- Complex structures included guide RNA and target DNA R-loops.
- Biochemical experiments corroborated structural findings.
Main Results:
- Revealed mechanisms for guide RNA processing and pre-ordering for target binding.
- Identified a strand displacement mechanism for guide-target hybridization.
- Suggested a single active site mechanism for double-stranded DNA cleavage.
Conclusions:
- Provided detailed molecular insights into Cas12a enzyme function.
- These findings may facilitate the further development of CRISPR-Cas12a genome editing technologies.
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