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• W2904350263 abstract "Expression of Rag1 and Rag2 is tightly regulated in developing T cells to mediate TCR gene assembly. Here we have investigated the molecular mechanisms governing the assembly and disassembly of a transcriptionally active RAG locus chromatin hub in CD4+CD8+ thymocytes. Rag1 and Rag2 gene expression in CD4+CD8+ thymocytes depends on Rag1 and Rag2 promoter activation by a distant antisilencer element (ASE). We identify GATA3 and E2A as critical regulators of the ASE, and Runx1 and E2A as critical regulators of the Rag1 promoter. We reveal hierarchical assembly of a transcriptionally active chromatin hub containing the ASE and RAG promoters, with Rag2 recruitment and expression dependent on assembly of a functional ASE–Rag1 framework. Finally, we show that signal-dependent down-regulation of RAG gene expression in CD4+CD8+ thymocytes depends on Ikaros and occurs with disassembly of the RAG locus chromatin hub. Our results provide important new insights into the molecular mechanisms that orchestrate RAG gene expression in developing T cells." @default.
• W2904350263 created "2018-12-22" @default.
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• W2904350263 date "2018-12-13" @default.
• W2904350263 modified "2023-09-24" @default.
• W2904350263 title "Hierarchical assembly and disassembly of a transcriptionally active RAG locus in CD4+CD8+ thymocytes" @default.
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• W2904350263 doi "https://doi.org/10.1084/jem.20181402" @default.
• W2904350263 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6314527" @default.
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• W2904350263 hasPublicationYear "2018" @default.
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