期刊
CHEMICAL SCIENCE
卷 13, 期 7, 页码 2011-2020出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1sc05558e
关键词
-
资金
- National Key R&D Program of China [2021YFA0910100]
- National Natural Science Foundation of China [22034002, 21725503, 21974038, 22074034]
In this study, the CRISPR-Cas system was engineered as a versatile live-cell biosensing system for monitoring diverse intracellular biomolecules. By leveraging the trans-cleavage activity of CRISPR-Cas12a, this system enabled sensitive sensing of various biomolecules such as telomerase, ATP, and microRNA-21.
The CRISPR-Cas system has been repurposed as a powerful live-cell imaging tool, but its utility is limited to genomic loci and mRNA imaging in living cells. Here, we demonstrated the potential of the CRISPR-Cas system as a generalizable live-cell biosensing tool by extending its applicability to monitor diverse intracellular biomolecules. In this work, we engineered a CRISPR-Cas12a system with a generalized stimulus-responsive switch mechanism based on PAM-less conditional DNA substrates (pcDNAs). The pcDNAs with stimulus-responsiveness toward a trigger were constructed from the DNA substrates featuring no requirement of a protospacer-adjacent motif (PAM) and a bubble structure. With further leveraging the trans-cleavage activity of CRISPR-Cas12a for signal reporting, we established a versatile CRISPR-based live-cell biosensing system. This system enabled the sensitive sensing of various intracellular biomolecules, such as telomerase, ATP, and microRNA-21, making it a helpful tool for basic biochemical research and disease diagnostics.
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