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生物通
1 个月
学院刘亮教授团队发现CRISPR-Cas系统具备反式切割pre-crRNA活性并开发 ...
此外,团队成员也在其他V型CRISPR-Cas系统成员,如Cas12b、Cas12i和Cas12j,以及II型CRISPR-Cas9中观察到了这一现象。与Cas12a稍不同,Cas9仅在单链靶标DNA存在的情况下才会启动对pre-crRNA的spacer区的反式切割,且Cas9的HNH和RuvC结构域对于pre-crRNA的反式切割都是必需的。
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