Studies on the regulation of influenza virus RNA replication: a differential inhibition of the synthesis of vRNA segments in shift-up experiments withts mutants
| Autor: | S. G. Markushin, Gubareva Lv, N. L. Varich, N. V. Kaverin |
|---|---|
| Rok vydání: | 1991 |
| Předmět: |
viruses
Orthomyxoviridae Mutant Chick Embryo Virus Lesion chemistry.chemical_compound Capsid Virology medicine Animals Gene Gel electrophoresis biology Temperature RNA General Medicine biochemical phenomena metabolism and nutrition biology.organism_classification Molecular biology Uridine Kinetics Phenotype chemistry Influenza A virus Mutation RNA Viral medicine.symptom |
| Zdroj: | Archives of Virology. 121:9-17 |
| ISSN: | 1432-8798 0304-8608 |
| DOI: | 10.1007/bf01316740 |
| Popis: | The regulation of influenza virus vRNA synthesis in the course of the reproduction cycle was studied with the use of a series of ts mutants in shift-up experiments. The synthesis of vRNA segments was registered by means of polyacrylamide gel electrophoresis of nucleocapsid-associated RNA isolated from the infected cells labelled with [3H]uridine after the shift-up to a semi-permissive temperature. Each mutant exhibited a specific differential pattern of vRNA synthesis inhibition after the shift-up. The most affected segments were either vRNA 4, vRNAs 4 and 7, or vRNAs 4, 6, and 7 in cells infected, respectively, with ts mutants C15 (ts lesion in PB1 gene), C45 (ts lesion in PA gene) and CmN3 (ts lesion in NS gene). The synthesis of vRNAs 1, 2, and 3 was relatively resistant to the shift-up in the cells infected with C15 or C45 and more sensitive in the cells infected with C44 (ts lesion in PB2 gene) or CmN3. The replication of the "early" genes (vRNAs 5 and 8) was generally least affected by the shift-up. The results are discussed in connection with the "early-late" transition of vRNA synthesis pattern in the course of infection. |
| Databáze: | OpenAIRE |
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