Abstract

A method is described to synthesize small RNAs of defined length and sequence using T7 RNA polymerase and templates of synthetic DNA which contain the T7 promoter. Partially single stranded templates which are base paired only in the -17 to +1 promoter region are just as active in transcription as linear plasmid DNA. Runoff transcripts initiate at a unique, predictable position, but may have one nucleotide more or less on the 3' terminus. In addition to the full length products, the reactions also yield a large amount of smaller oligoribonucleotides in the range from 2 to 6 nucleotides which appear to be the result of abortive initiation events. Variants in the +1 to +6 region of the promoter are transcribed with reduced efficiency but increase the variety of RNAs which can be made. Transcription reaction conditions have been optimized to allow the synthesis of milligram amounts of virtually any RNA from 12 to 35 nucleotides in length.

Keywords

BiologyT7 RNA polymeraseTranscription (linguistics)Base pairRNADNAPolymeraseNucleotideTemplateMolecular biologyRNA polymeraseGeneticsGeneBacteriophage

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Year
1987
Type
article
Volume
15
Issue
21
Pages
8783-8798
Citations
2144
Access
Closed

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John F. Milligan, Duncan R. Groebe, Gary W. Witherell et al. (1987). Oligoribonucleotide synthesis using T7 RNA polymerase and synthetic DNA templates. Nucleic Acids Research , 15 (21) , 8783-8798. https://doi.org/10.1093/nar/15.21.8783

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DOI
10.1093/nar/15.21.8783