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Targeted Perturb-seq enables genome-scale genetic screens in single cells
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Targeted Perturb-seq enables genome-scale genetic screens in single cells
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Journal Article
Targeted Perturb-seq enables genome-scale genetic screens in single cells
2020
Overview
The transcriptome contains rich information on molecular, cellular and organismal phenotypes. However, experimental and statistical limitations constrain sensitivity and throughput of genetic screening with single-cell transcriptomics readout. To overcome these limitations, we introduce targeted Perturb-seq (TAP-seq), a sensitive, inexpensive and platform-independent method focusing single-cell RNA-seq coverage on genes of interest, thereby increasing the sensitivity and scale of genetic screens by orders of magnitude. TAP-seq permits routine analysis of thousands of CRISPR-mediated perturbations within a single experiment, detects weak effects and lowly expressed genes, and decreases sequencing requirements by up to 50-fold. We apply TAP-seq to generate perturbation-based enhancer–target gene maps for 1,778 enhancers within 2.5% of the human genome. We thereby show that enhancer–target association is jointly determined by three-dimensional contact frequency and epigenetic states, allowing accurate prediction of enhancer targets throughout the genome. In addition, we demonstrate that TAP-seq can identify cell subtypes with only 100 sequencing reads per cell.
Targeted sequencing of perturbation effects offers a sensitive approach to capture genes of interest in CRISPR-mediated screens, enabling genome-scale screens at higher scale and lower cost than whole-transcriptome Perturb-seq.
Publisher
Nature Publishing Group US,Nature Publishing Group
