Mapping information-rich genotype-phenotype landscapes with genome-scale Perturb-seq

By J. Replogle, R. Saunders, Angela N. Pogson, Jeffrey A. Hussmann, A. LeNail, Alina Guna, Lauren G. Mascibroda, Eric J. Wagner, K. Adelman, G. Lithwick-Yanai and 7 more. bioRxiv, 2021

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A central goal of genetics is to define the relationships between genotypes and phenotypes. High-content phenotypic screens such as Perturb-seq (pooled CRISPR-based screens with single-cell RNA-sequencing readouts) enable massively parallel functional genomic mapping but, to date, have been used at limited scales. Here, we perform genome-scale Perturb-seq targeting all expressed genes with CRISPR interference (CRISPRi) across >2.5 million human cells and present a framework to power biological discovery with the resulting genotype-phenotype map. We use transcriptional phenotypes to predict the function of poorly-characterized genes, uncovering new regulators of ribosome biogenesis (including CCDC86, ZNF236, and SPATA5L1), transcription (C7orf26), and mitochondrial respiration (TMEM242). In addition to assigning gene function, single-cell transcriptional phenotypes allow for in-depth dissection of complex cellular phenomena – from RNA processing to differentiation. We leverage this ability to systematically identify the genetic drivers and consequences of aneuploidy and to discover an unanticipated layer of stress-specific regulation of the mitochondrial genome. Our information-rich genotype-phenotype map reveals a multidimensional portrait of gene function and cellular behavior.

Subfields: Molecular Biology, Plant Science

View Paper: https://www.semanticscholar.org/paper/064ced50b61d6071f1ecaaea7e49d6cca208da41

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In Molecular Biology

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