title: The interactomes of POU5F1 and SOX2 enhancers in human embryonic stem cells.
abstract: The genes POU5F1 and SOX2 are critical for pluripotency and reprogramming, yet the chromosomal organization around these genes remains poorly understood. We assayed long-range chromosomal interactions on putative enhancers of POU5F1 and SOX2 genes in human embryonic stem cells (hESCs) using 4C-Seq technique. We discovered that their frequent interacting regions mainly overlap with early DNA replication domains. The interactomes are associated with active histone marks and enriched with 5-hydroxymethylcytosine sites. In hESCs, genes within the interactomes have elevated expression. Additionally, some genes associated with the POU5F1 enhancer contribute to pluripotency. Binding sites for multiple DNA binding proteins, including ATF3, CTCF, GABPA, JUND, NANOG, RAD21 and YY1, are enriched in both interactomes. The RARG locus, frequently interacting with the POU5F1 locus, has abundant RAD21 binding sites co-localized with other protein binding sites. Thus the interactomes of these two pluripotency genes could be an important part of the regulatory network in hESCs.
authors.affiliation: Eli and Edythe Broad Center for Regenerative Medicine and Stem Cell Research, Department of Biochemistry and Molecular Biology, University of Southern California, 1425 San Pablo Street, Los Angeles, CA 90033, USA.
authors.forename: Fan
authors.initials: F
authors.lastname: Gao
authors.forename: Zong
authors.initials: Z
authors.lastname: Wei
authors.forename: Woojin
authors.initials: W
authors.lastname: An
authors.forename: Kai
authors.initials: K
authors.lastname: Wang
authors.forename: Wange
authors.initials: W
authors.lastname: Lu
mesh_terms: D002454:Cell Differentiation; D002478:Cells, Cultured; D053595:Embryonic Stem Cells / Q000166:cytology* / Q000378:metabolism*; D006801:Humans; D050814:Octamer Transcription Factor-3 / Q000378:metabolism*; D025941:Protein Interaction Mapping; D020543:Proteome / Q000378:metabolism*; D055748:SOXB1 Transcription Factors / Q000378:metabolism*; D015398:Signal Transduction / Q000502:physiology*; D015854:Up-Regulation / Q000502:physiology
chemical_list: D050814:Octamer Transcription Factor-3; C494173:POU5F1 protein, human; D020543:Proteome; C527782:SOX2 protein, human; D055748:SOXB1 Transcription Factors
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