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Counterselection of prokaryotic ribosomal RNA during reverse transcription using non-random hexameric oligonucleotides

AuthorsGonzález Grau, Juan Miguel ; Robb, F. T.
Issue Date2007
CitationJournal of Microbiological Methods 71(3): 288- 91 (2007)
AbstractRibosomal RNA (rRNA) is the major component in total RNA extracts, interfering with the synthesis of cDNA corresponding to messenger RNA (mRNA). In this study, we present a novel strategy for selectively discriminating against rRNA and favoring mRNA from prokaryotes during synthesis of cDNA by reverse transcriptase. Our technique is based on the fact that rRNA sequences, in many species, are G + C rich relative to the genome at large, and highly conserved among prokaryotes. The sequence TTTT is therefore rarely found in rRNA sequences. However, TTTT priming sites are found at a much higher frequency in protein-encoding gene sequences. We designed specific hexamers (HD/DHTTTT) to prime reverse transcription reactions resulting in a selective synthesis of cDNA corresponding to mRNA from prokaryotic total RNA extractions.
Identifiersdoi: 10.1016/j.mimet.2007.09.010
issn: 0167-7012
e-issn: 1872-8359
Appears in Collections:(IRNAS) Artículos
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