Novel intron-containing luciferase genes for quantitative analysis of mRNA levels in transient gene expression assays
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概要
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Firefly luciferase (Fluc) is commonly used as a sensitive reporter for transient gene expression assays in plants. Although the protein level of Fluc can easily be quantified, it is difficult to quantify the mature mRNA level of the reporter gene in these assays. The mRNA level can be measured using quantitative reverse-transcription PCR (qRT-PCR), but the reaction often amplifies both the target mature mRNA and contaminating DNA or unspliced pre-mRNA, thus providing inaccurate results. To address this problem, we constructed a series of novel Fluc genes containing intronic sequences measuring 315 bp or longer. Here, we show that the contaminating DNA and unspliced mRNA were not PCR-amplified due to presence of these introns. Moreover, the intron-containing Fluc gene conferred superior Fluc activity to the original intron-less Fluc gene. We propose that the novel Fluc genes reported here can be used to quantitate both protein and functional mRNA levels in transient gene expression assays in plants.
著者
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UGAKI Masashi
Department of Integrated Biosciences, Graduate School of Frontier Sciences, The University of Tokyo
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Hiratsuka Kazuyuki
Graduate School Of Biological Sciences Nara Institute Of Science And Technology
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Suzuki Masashi
Department Of Bioresources Chemistry Faculty Of Agriculture Okayama University
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Ogura Rieko
Venture Business Laboratory Yokohama National University
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Ugaki Masashi
Department of Agricultural and Environmental Biology, Graduate School of Agricultural and Life Sciences, The University of Tokyo
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Hayakawa Hideto
Department of Integrated Biosciences, Graduate School of Frontier Sciences, The University of Tokyo
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