A Perturbation Cell Atlas Of Human Induced Pluripotent Stem Cells
Nourreddine, S.; Doctor, Y.; Dailamy, A.; Forget, A.; Lee, Y.-H.; Chinn, B.; Khaliq, H.; Polacco, B.; Muralidharan, M.; Pan, E.; Zhang, Y.; Sigaeva, A.; Hansen, J. N.; Gao, J.; Parker, J. A.; Obernier, K.; Clark, T.; Chen, J. Y.; Metallo, C.; Lundberg, E.; Ideker, T.; Krogan, N.; Mali, P.
Show abstract
Towards comprehensively investigating the genotype-phenotype relationships governing the human pluripotent stem cell state, we generated an expressed genome-scale CRISPRi Perturbation Cell Atlas in KOLF2.1J human induced pluripotent stem cells (hiPSCs) mapping transcriptional and fitness phenotypes associated with 11,739 targeted genes. Using the transcriptional phenotypes, we created a minimum distortion embedding map of the pluripotent state, demonstrating rich recapitulation of protein complexes, such as strong co-clustering of MRPL, BAF, SAGA, and Ragulator family members. Additionally, we uncovered transcriptional regulators that are uncoupled from cell fitness, discovering potential novel pluripotency (JOSD1, RNF7) and metabolic factors (ZBTB41). We validated these findings via phenotypic, protein-interaction, and metabolic tracing assays. Finally, we propose a contrastive human-cell engineering framework (CHEF), a machine learning architecture that learns from perturbation cell atlases to predict perturbation recipes that achieve desired transcriptional states. Taken together, our study presents a comprehensive resource for interrogating the regulatory networks governing pluripotency.
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