ArticleNucleic acids research2024
The complete pathway for co-transcriptional mRNA maturation within a large protein of a non-segmented negative-strand RNA virus.
Article in Nucleic acids research, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed.
- mRNA cap formation by the human respiratory syncytial virus large protein.Nucleic acids research · 2026Article
- Structure and function of the RNA polymerase complex of Borna disease virus, a nuclear-replicating non-segmented negative-strand RNA virus.Nucleic acids research · 2026Article
- Article
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Authors and funding
3 authors.
Funding
Abstract
Non-segmented negative-strand (NNS) RNA viruses, such as rabies, Nipah and Ebola, produce 5'-capped and 3'-polyadenylated mRNAs resembling higher eukaryotic mRNAs. Here, we developed a transcription elongation-coupled pre-mRNA capping system for vesicular stomatitis virus (VSV, a prototypic NNS RNA virus). Using this system, we demonstrate that the single-polypeptide RNA-dependent RNA polymerase (RdRp) large protein (L) catalyzes all pre-mRNA modifications co-transcriptionally in the following order: (i) 5'-capping (polyribonucleotidylation of GDP) to form a GpppA cap core structure, (ii) 2'-O-methylation of GpppA into GpppAm, (iii) guanine-N7-methylation of GpppAm into m7GpppAm (cap 1), (iv) 3'-polyadenylation to yield a poly(A) tail. The GDP polyribonucleotidyltransferase (PRNTase) domain of L generated capped pre-mRNAs of 18 nucleotides or longer via the formation of covalent enzyme-pre-mRNA intermediates. The single methyltransferase domain of L sequentially methylated the cap structure only when pre-mRNAs of 40 nucleotides or longer were associated with elongation complexes. These results suggest that the formation of pre-mRNA closed loop structures in elongation complexes via the RdRp and PRNTase domains followed by the RdRp and MTase domains on the same polypeptide is required for the cap 1 formation during transcription. Taken together, our findings indicate that NNS RNA virus L acts as an all-in-one viral mRNA assembly machinery.
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Registered trials
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