Sequential Activation of Guide RNAs to Enable Successive CRISPR-Cas9 Activities.
Sequential Activation of Guide RNAs to Enable Successive CRISPR-Cas9 Activities.
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DOI:
10.1016/j.molcel.2020.12.003
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发表时间:
2021-01-21
期刊:
影响因子:
16
通讯作者:
Merrill, Bradley J.
中科院分区:
文献类型:
--
作者:
Clarke, Ryan;Terry, Alexander R.;Pennington, Hannah;Hasty, Cody;MacDougall, Matthew S.;Regan, Maureen;Merrill, Bradley J.
Currently, either highly multiplexed genetic manipulations can be delivered to mammalian cells all at once, or extensive engineering of gene regulatory sequences can be used to conditionally activate a few manipulations. Here, we provide proof-of-principle for a new system enabling multiple genetic manipulations to be executed as a preprogrammed cascade of events. The system leverages the programmability of the S. pyogenes Cas9 and is based on flexible arrangements of individual modules of activity. The basic module consists of an inactive single guide RNA (sgRNA) -like component that is converted to an active state through the effects of another sgRNA. Modules can be arranged to bring about an algorithmic program of sequential genetic manipulations without the need for engineering cell type specific promoters or gene regulatory sequences. With the expanding diversity of available tools that utilize spCas9, this sgRNA-based system provides multiple levels of interfacing with mammalian cell biology.
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