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. 2021 Jun 10;9:645647. doi: 10.3389/fcell.2021.645647

FIGURE 2.

FIGURE 2

Model for Xist and Xist regulation at the process of XCI. (A) The process of dynamic and multifaceted modulation of XCI by lncRNA Xist. lncRNA Xist is a multitasking RNA that recruits protein complexes (such as OCT4, CTCF, Tsix, Xite, PRC1, PRC2, SPEN, ATRX, hnRNPU, hnRNPK, SHARP, HDAC3, LBR, Airn, Kcnq1ot1, RBM15, WTAP, trisomy 21, U1 snRNP, Rsx, Sox2, PRDM14, Jpx, Rnf12, and RepA) to initiate, establish, and maintain the XCI state by histone modifications, DNA methylation, and H4 hypoacetylation. (B) LncRNA Xist regulation network of genetic interactions (Augui et al., 2011). Note that here arrows do not necessarily imply direct regulation.