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Yes-associated protein (YAP) is an important transcriptional coactivator in the Hippo signaling pathway. Using CRISPR/Cas9 technology, we established a stable YAP-knockdown (YAP-KD) induced pluripotent stem cell (iPSC) from the MUSIi012-A cell line. The YAP-KD iPSC MUSIi012-A-2 maintained the pluripotent phenotype, the ability to differentiate into all three embryonic germ layers, and it maintained the normal karyotype. Keywords: YAP, Hippo signaling pathway, iPSC

WWTR1 or TAZ (WWTR1/TAZ) is a transcriptional coactivator that acts as a downstream regulatory target in the Hippo signaling pathway, which plays a pivotal role in regulating cell proliferation and anti-apoptosis. It has been shown in other cell types that WWTR1/TAZ plays a redundant role to its homolog YAP1. Using CRISPR/Cas9 gene editing, we established the WWTR1/TAZ-KO cell line, which features homozygous deletion of WWTR1 gene from human iPSCs. The established WWTR1/YAZ-KO cell line maintained the pluripotent phenotype, the ability to differentiate into all three embryonic germ layers, and normal karyotype.