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• W4225761134 abstract "Abstract Regulation of gene expression by premature termination of transcription has been well described in all domains of life, including metazoans, yeast, plants, and bacteria. Although methods for identification of such regulatory events by sequencing are available, the focused biochemical studies of the mechanism are hampered by lack of highly sensitive and accurate experimental methods. Here, we propose a new method for absolute quantification of premature transcription termination events, PTT-quant. It is based on highly sensitive two-step digital droplet PCR protocol, coupled with normalized cDNA synthesis attained by site-specific pre-cleavage of investigated transcripts with RNase H. As a consequence, our method enables the reliable and sensitive quantification of both, prematurely terminated and full-length transcripts. By application of our method to investigation of transcriptional riboswitches in Bacillus subtilis , we were able to precisely measure the dynamics of S-adenosylmethionine (SAM) riboswitch induction, which turned to be ~ 23% higher in comparison the results obtained without cDNA synthesis normalization. Key points • A novel method for quantification of premature transcription termination events was established. • PTT-quant measures absolute concentration of full-length and terminated transcripts. • RNase H and the digital droplet PCR technique is used in PTT-quant." @default.
• W4225761134 created "2022-05-05" @default.
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• W4225761134 date "2022-02-01" @default.
• W4225761134 modified "2023-10-14" @default.
• W4225761134 title "PTT-quant: a new method for direct identification and absolute quantification of premature transcription termination events, following the example of bacterial riboswitches" @default.
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• W4225761134 doi "https://doi.org/10.1007/s00253-022-11809-1" @default.
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