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Discovery of the Rnase activity of CRISPR–Cas12a and its distinguishing cleavage efficiency on various substrates
Chemical Communications ( IF 4.3 ) Pub Date : 2022-01-25 , DOI: 10.1039/d1cc06295f
Jiacheng Li 1 , Tong Luo 1 , Yao He 2 , Hui Liu 1 , ZhiWei Deng 1 , Jiaqi Bu 1 , Xi Long 1 , Shian Zhong 1 , Yanjing Yang 1
Affiliation  

We, herein, indicated for the first time the Rnase activities of LbCas12a on linear ssRNA above 11 bases, and hairpin RNA substrates. Meanwhile, the LbCas12a bound to ssDNA or ssRNA exhibited different cleavage efficiencies on various substrates, including short ssDNA, hairpin DNA, linear ssRNA and hairpin RNA. With hairpin DNA as a reporter, we attained a detection limit of 5 pM and 50 pM for the ssDNA and ssRNA targets, respectively. We believe that these findings will pave a new avenue for expanding the reporter toolbox for Cas12a-based diagnostics in biosensing and biochemistry.

中文翻译:

发现 CRISPR-Cas12a 的 Rnase 活性及其对各种底物的不同切割效率

我们在此首次表明 LbCas12a 在 11 个碱基以上的线性 ssRNA 和发夹 RNA 底物上的 Rnase 活性。同时,与 ssDNA 或 ssRNA 结合的 LbCas12a 在各种底物上表现出不同的切割效率,包括短 ssDNA、发夹 DNA、线性 ssRNA 和发夹 RNA。以发夹 DNA 作为报告基因,我们对 ssDNA 和 ssRNA 靶标的检测限分别为 5 pM 和 50 pM。我们相信,这些发现将为扩展基于 Cas12a 的生物传感和生物化学诊断的报告工具箱铺平新的途径。
更新日期:2022-01-25
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