The L Protein of Vesicular Stomatitis Virus Modulates the Response of the Polyadenylic Acid Polymerase to S-Adenosylhomocysteine
| Autor: | Hutchinson Kl, Hunt Dm, Mehta R |
|---|---|
| Rok vydání: | 1988 |
| Předmět: |
Polyadenylation
Viral protein viruses Mutant Heterologous Viral Nonstructural Proteins Biology medicine.disease_cause Vesicular stomatitis Indiana virus Virus Viral Proteins Capsid Species Specificity Virology medicine Homocysteine Messenger RNA Mutation Viral Core Proteins Polynucleotide Adenylyltransferase RNA-Dependent RNA Polymerase biology.organism_classification Nucleotidyltransferases S-Adenosylhomocysteine Molecular biology Adenosine Monophosphate Vesicular stomatitis virus Uridine Monophosphate |
| Zdroj: | Journal of General Virology. 69:2555-2561 |
| ISSN: | 1465-2099 0022-1317 |
| DOI: | 10.1099/0022-1317-69-10-2555 |
| Popis: | Summary TsG16(I) is a temperature-sensitive (ts) mutant of vesicular stomatitis virus, Indiana serotype, which overproduces polyadenylic acid [poly(A)] in an in vitro transcription system due to a mutation in the L protein. Others have reported that l-S-adenosylhomocysteine (S-Ado-Hcy) causes wild-type (wt) virus to overproduce poly(A) in vitro. The possibility that tsG16(I) constitutively expresses a property induced by S-Ado-Hcy in the case of wt virus was found not to be so since polyadenylation by the mutant was still sensitive to S-Ado-Hcy. Indeed, S-Ado-Hcy caused tsG16(I) to overproduce poly(A) in vitro to a greater extent than its parental wt virus. The increase in polyadenylation observed in response to saturating levels of S-Ado-Hcy differed for tsG16(I), for its parental wt virus and for another wt strain. To characterize which viral protein modulated the polyadenylation response to S-Ado-Hcy, purified virions were fractionated and their phenotypes in homologous and heterologous reconstitution assays were examined. The results indicated that the viral L protein modulated the response in all three stocks of virus. These data provide further evidence to suggest that the L protein of vesicular stomatitis virus plays a role in polyadenylation of the viral mRNA. |
| Databáze: | OpenAIRE |
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