gDesigner: computational design of synthetic gRNAs for Cas12a-based transcriptional repression in mammalian cells.
gDesigner: computational design of synthetic gRNAs for Cas12a-based transcriptional repression in mammalian cells.
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DOI:
10.1038/s41540-022-00241-w
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发表时间:
2022-09-16
影响因子:
4
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中科院分区:
文献类型:
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Synthetic networks require complex intertwined genetic regulation often relying on transcriptional activation or repression of target genes. CRISPRi-based transcription factors facilitate the programmable modulation of endogenous or synthetic promoter activity and the process can be optimised by using software to select appropriate gRNAs and limit non-specific gene modulation. Here, we develop a computational software pipeline, gDesigner, that enables the automated selection of orthogonal gRNAs with minimized off-target effects and promoter crosstalk. We next engineered a Lachnospiraceae bacterium Cas12a (dLbCas12a)-based repression system that downregulates target gene expression by means of steric hindrance of the cognate promoter. Finally, we generated a library of orthogonal synthetic dCas12a-repressed promoters and experimentally demonstrated it in HEK293FT, U2OS and H1299 cells lines. Our system expands the toolkit of mammalian synthetic promoters with a new complementary and orthogonal CRISPRi-based system, ultimately enabling the design of synthetic promoter libraries for multiplex gene perturbation that facilitate the understanding of complex cellular phenotypes.
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影响因子:
14.8
作者:
Li Y;Jiang Y;Chen H;Liao W;Li Z;Weiss R;Xie Z
通讯作者:
Xie Z
影响因子:
5.6
作者:
Andronescu, M;Zhang, ZC;Condon, A
通讯作者:
Condon, A
影响因子:
3.7
作者:
Engler, Carola;Kandzia, Romy;Marillonnet, Sylvestre
通讯作者:
Marillonnet, Sylvestre
影响因子:
46.9
作者:
通讯作者:
--
影响因子:
22.7
作者:
BRON, C;KERBOSCH, J
通讯作者:
KERBOSCH, J