Mutations in the gag gene of Moloney murine leukemia virus: effects on production of virions and reverse transcriptase
| Autor: | J Colicelli, Stephen P. Goff, P Schwartzberg, M L Gordon |
|---|---|
| Rok vydání: | 1984 |
| Předmět: |
viruses
Immunology Mutant Gene Products gag medicine.disease_cause Microbiology Mice Viral Proteins Virology Murine leukemia virus medicine Animals Mutation biology RNA-Directed DNA Polymerase Virion Group-specific antigen Provirus biology.organism_classification Molecular biology Reverse transcriptase Complementation Insect Science DNA Viral Chromosome Deletion Moloney murine leukemia virus Research Article |
| Zdroj: | Journal of Virology. 49:918-924 |
| ISSN: | 1098-5514 0022-538X |
| DOI: | 10.1128/jvi.49.3.918-924.1984 |
| Popis: | We have constructed a series of deletion mutations in the p30 and p10 domains of the gag gene of Moloney murine leukemia virus. Mutants with deletions in P30 were completely defective in virion particle production even though an altered gag precursor protein is synthesized. This domain is apparently critical for particle formation. A mutant in P10 was able to release virion particles into the medium, and low levels of reverse transcriptase activity could be detected in these virions. To explore the effects of these mutations on the utilization of the gag-pol precursor, we have introduced these mutants into cells already releasing defective particles from an endogenous provirus which directs the synthesis of gag gene products and not pol gene products. The P10 mutant was capable of providing pol function as judged by the incorporation of high levels of reverse transcriptase into the particles and complete complementation for XC plaque formation. In contrast, the mutants in P30 were negative in this complementation test. Thus, those gag mutants which were unable on their own to assemble virion particles were also unable to contribute the gag-pol precursor to these particles. These mutations are the first to be mapped to the gag region which affect pol function, suggesting that the gag-pol precursor must be assembled before pol is functionally separated from the gag domain. The concordance of the effects of different mutations on both particle formation and gag-pol utilization suggests that similar domains of gag (namely, domains in the P30 region) are needed for these two processes. |
| Databáze: | OpenAIRE |
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