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Updated: Sep 16, 2026

Gene Digital Circuits Based on CRISPR-Cas Systems and Anti-CRISPR Proteins
Published on: October 18, 2022
A steric hindrance-regulated autocatalytic CRISPR/Cas12a system for direct and amplification-free microRNA detection
Weisu Kong1, Jiaxuan Li1, Ruyue Wei1
1College of Chemistry, Chemical Engineering and Materials Science, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Institute of Molecular and Nano Science, Shandong Normal University, Jinan 250014, P. R. China. panwei@sdnu.edu.cn.
Abstract:
We constructed a CRISPR/Cas12a autocatalytic system based on a miRNA-triggered overhang blocker (OB) cleavage-recombination framework, in which Cas12a sequentially removed steric hindrance to initiate cyclic autocatalysis, enabling exponential signal amplification for visual miRNA detection without target pre-amplification, thereby overcoming direct Cas12a recognition limitations for point-of-care diagnostics.
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