Extent of terminal complementarity modulates the balance between transcription and replication of vesicular stomatitis virus RNA.

Wertz GW, Whelan S, LeGrone A, Ball LA
Proc Natl Acad Sci U S A. 1994 91 (18): 8587-91

PMID: 8078927 · PMCID: PMC44651 · DOI:10.1073/pnas.91.18.8587

We compared the template properties of a subgenomic RNA that contained the authentic 5' and 3' ends of the vesicular stomatitis virus genome with those of RNAs in which the wild-type termini were engineered to extend their complementarity from 8 to 51 nucleotides as seen in defective interfering RNAs. The RNA with authentic 5' and 3' ends directed abundant transcription but low replication. In contrast, RNAs with complementary termini derived from either end of the genome replicated well but transcribed poorly or not at all. These results have implications for understanding the mechanisms of RNA replication and transcription; they explain the replicative dominance of defective interfering RNAs and demonstrate that the extent of terminal complementarity rather than its exact sequence is a major determinant of whether the template predominantly directs transcription or replication.

MeSH Terms (10)

Base Sequence Gene Expression Regulation, Viral Molecular Sequence Data Repetitive Sequences, Nucleic Acid RNA, Messenger RNA, Viral Templates, Genetic Transcription, Genetic Vesicular stomatitis Indiana virus Virus Replication

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