📄 Nucleotide sequence of coronavirus TGEV genomic RNA: evidence for 3 mRNA species between the peplomer and matrix protein genes

The region of the TGEV genome between the E1-matrix protein gene and the E2-peplomer protein gene has been sequenced from a cDNA clone. The consensus recognition sequence, 5 ′AATT CTAAAC was found upstream from 3 large open reading frames. In coronaviruses these homologous recognition sequences are involved in the initiation of transcription suggesting that there are 3 mRNA species in this region of the TGEV genome. Northern blot analysis and nuclease S1 mapping confirmed the presence of 3 mRNA species between mRNA 3 encoding the E2-peplomer protein and mRNA 6 encoding the E1-matrix protein. The 5′ regions of these 3 mRNAs encode potential polypeptides of predicted molecular weight; 7859, 27744 and 9287, respectively. The potential translation product of ORF B (27744 Da) is considerably larger than previously reported and could be difficult to distinguish by size from the E1-matrix protein. © 1989.

keywords 🔗 reading frames (100) 🔗 reading frame (222) 🔗 molecular weight (50) 🔗 open reading (215) 🔗 previously reported (79)

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