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• W2005272471 abstract "To estimate the transcriptional activity of p53 in individual living mammalian cells, we constructed the enhanced green fluorescent protein-red fluorescent protein (EGFP-DsRed) reporter system with the EGFP-p53 expression vector and the reporter plasmid, which carried a p53-dependent promoter. The expression level and transcriptional activity of EGFP-p53 were determined simultaneously by green and red fluorescence signals, respectively. In this system, we could target only the cells expressing p53 at endogenous levels, as observed in UV- or adriamycin-stimulated A549 cells. Using this system, we investigated the transcriptional activity of mutant p53s in tetramerization domain. Transcriptional activities were nearly abolished by seven mutations and significantly reduced in several mutant p53s. However, under overexpression conditions, the latter mutant p53s showed activity similar to that observed in wild-type p53. These results indicated the importance of physiological concentration for p53 proteins in cells so as to analyze their activities. Fluorescence intensity distribution analysis indicated that the mutant p53s lacking transcriptional activity presented as monomer forms in the cellular extract. In most of the mutant p53s, the decrease in transcriptional activity correlated with an increase in the fraction of monomers. This reporter system can be used for estimating the transcriptional activity of mutant p53s without contribution of the cells overexpressing p53." @default.
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• W2005272471 date "2009-04-01" @default.
• W2005272471 modified "2023-09-24" @default.
• W2005272471 title "Evaluation of transcriptional activity of p53 in individual living mammalian cells" @default.
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• W2005272471 doi "https://doi.org/10.1016/j.ab.2009.01.030" @default.
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