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• W2009869892 abstract "The ability to direct gene delivery to a user-defined chromosomal location would greatly improve gene transfer applications. The piggyBac transposon system is a nonviral gene transfer system proven effective in a variety of cells and tissues, including human cells. We fused a highly site-specific synthetic zinc-finger DNA-binding domain (ZFP) to the N-terminus of the piggyBac transposase and evaluated site-directed genomic integration in human cells. Chimeric ZFP-piggyBac transposase exhibited robust gene transfer activity, targeted binding to a cognate endogenous chromosomal ZFP site in the human genome, and site-directed transposon integration into an episomal plasmid target containing a single ZFP site in human cells. We evaluated the ability of ZFP-piggyBac to direct gene integration into an engineered chromosomal ZFP target site in the human genome and consistently observed a higher degree of ZFP-piggyBac site-directed genomic integration when compared to native piggyBac. Chromatin immunoprecipitation (ChIP) experiments revealed binding of native piggyBac to our engineered TTAA-containing chromosomal target which supported integration, but not a TTAA-deficient chromosomal target which lacked integration. Our results offer insight into the requirements for using a chimeric zinc finger-piggyBac transposase to direct integration into a user-defined chromosomal location. The ability to direct gene delivery to a user-defined chromosomal location would greatly improve gene transfer applications. The piggyBac transposon system is a nonviral gene transfer system proven effective in a variety of cells and tissues, including human cells. We fused a highly site-specific synthetic zinc-finger DNA-binding domain (ZFP) to the N-terminus of the piggyBac transposase and evaluated site-directed genomic integration in human cells. Chimeric ZFP-piggyBac transposase exhibited robust gene transfer activity, targeted binding to a cognate endogenous chromosomal ZFP site in the human genome, and site-directed transposon integration into an episomal plasmid target containing a single ZFP site in human cells. We evaluated the ability of ZFP-piggyBac to direct gene integration into an engineered chromosomal ZFP target site in the human genome and consistently observed a higher degree of ZFP-piggyBac site-directed genomic integration when compared to native piggyBac. Chromatin immunoprecipitation (ChIP) experiments revealed binding of native piggyBac to our engineered TTAA-containing chromosomal target which supported integration, but not a TTAA-deficient chromosomal target which lacked integration. Our results offer insight into the requirements for using a chimeric zinc finger-piggyBac transposase to direct integration into a user-defined chromosomal location." @default.
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• W2009869892 date "2011-09-01" @default.
• W2009869892 modified "2023-10-15" @default.
• W2009869892 title "Manipulating piggyBac Transposon Chromosomal Integration Site Selection in Human Cells" @default.
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• W2009869892 doi "https://doi.org/10.1038/mt.2011.129" @default.
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