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H3K9me3 and H3K9Ac ChIP-Seq performed on naïve WT and TRIM28KO CD4 T cells

ABSTRACT: Critical role for TRIM28 and HP1b/g in the epigenetic control of T cell metabolic reprogramming and effector differentiation

ORGANISM(S): Mus musculus

PROVIDER: GSE140446 | GEO | 2019/11/16

REPOSITORIES: GEO

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Project description:Reprogramming to induced pluripotent stem cells (iPSCs) and differentiation of pluripotent stem cells (PSCs) are primarily regulated by epigenetic machinery. Tripartite motif protein 28 (TRIM28), a universal mediator of Krüppel-associated box domain zinc fingers (KRAB-ZNFs), is known to regulate both processes, however exact mechanism and identity of participating KRAB-ZNF genes remains unknown. Here, using a novel reporter system, we first showed that TRIM28/KRAB-ZNFs alter DNA methylation patterns in addition to H3K9me3 to cause gene repression during reprogramming. Next, using several expression datasets, we identified novel KRAB-ZNFs (ZNF114, ZNF483 and ZNF589) in the human genome that regulate pluripotency. Mechanistically, we demonstrated that these KRAB-ZNFs directly alter gene expression of important developmental genes by modulation of H3K9me3 and DNA methylation on their promoters. In summary, TRIM28 employs novel KRAB-ZNFs to evoke epigenetic silencing of its target differentiation genes by H3K9me3 and DNA methylation.

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