title: Sox2 regulatory region 2 sequence works as a DNA nuclear targeting sequence enhancing the efficiency of an exogenous gene expression in ES cells.
abstract: In this report, the effects of two DNA nuclear targeting sequence (DTS) candidates on the gene expression efficiency in ES cells were investigated. Reporter plasmids containing the simian virus 40 (SV40) promoter/enhancer sequence (SV40-DTS), a DTS for various types of cells but not being reported yet for ES cells, and the 81 base pairs of Sox2 regulatory region 2 (SRR2) where two transcriptional factors in ES cells, Oct3/4 and Sox2, are bound (SRR2-DTS), were introduced into cytoplasm in living cells by femtoinjection. The gene expression efficiencies of each plasmid in mouse insulinoma cell line MIN6 cells and mouse ES cells were then evaluated. Plasmids including SV40-DTS and SRR2-DTS exhibited higher gene expression efficiency comparing to plasmids without these DTSs, and thus it was concluded that both sequences work as a DTS in ES cells. In addition, it was suggested that SRR2-DTS works as an ES cell-specific DTS. To the best of our knowledge, this is the first report to confirm the function of DTSs in ES cells.
authors.affiliation: Department of Biotechnology and Life Science, Tokyo University of Agriculture and Technology, 2-24-16, Naka-cho, Koganei, Tokyo 184-8588, Japan.
authors.forename: Hisakage
authors.initials: H
authors.lastname: Funabashi
authors.forename: Makoto
authors.initials: M
authors.lastname: Takatsu
authors.forename: Mikako
authors.initials: M
authors.lastname: Saito
authors.forename: Hideaki
authors.initials: H
authors.lastname: Matsuoka
mesh_terms: D000818:Animals; D001483:Base Sequence; D002467:Cell Nucleus / Q000378:metabolism*; D002478:Cells, Cultured; D004247:DNA / Q000378:metabolism*; D053595:Embryonic Stem Cells / Q000378:metabolism*; D005786:Gene Expression Regulation; D051379:Mice; D012045:Regulatory Sequences, Nucleic Acid; D055748:SOXB1 Transcription Factors / Q000378:metabolism*; D013539:Simian virus 40 / Q000235:genetics
chemical_list: D055748:SOXB1 Transcription Factors; C527783:Sox2 protein, mouse; D004247:DNA