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Learn MoreTo investigate the effect of Smchd1 ablation on de novo X chromosome inactivation (XCI), we derived clonal neural progenitor cells (NPCs) from Smchd1+/+ (wild-type, WT) and Smchd1-/- mouse embryonic stem cells (ES cells; ESC). We generated allele-specific RNA-seq datasets from WT and Smchd1-/- NPCs to examine the effect of Smchd1 ablation on gene silencing. In addition, we produced allele-specific ChIP-seq profiles of H3K4me3, H3K27me3, CTCF, and RAD21 and Xist CHART-seq profiles in WT and Smchd1-/- NPCs to investigate the role of SMCHD1 on the distribution of euchromatin, facultative heterochromatin, architectural proteins, and Xist RNA on the inactive X chromosome (Xi). To determine the localization of SMCHD1 on the Xi, we employed allele-specific DamID-seq to map SMCHD1-binding regions in female mouse embryonic fibroblasts. Furthermore, we performed in situ Hi-C on WT NPCs, Smchd1-/- NPCs, and female ES cells undergoing XCI, in order to explore the role of SMCHD1 in regulating the higher-order structure of the Xi. SOURCE: Chen-Yu Wang (cywang@molbio.mgh.harvard.edu) - Jeannie T. Lee Massachusetts General Hospital
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