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. 1978 Jan;25(1):37–41. doi: 10.1128/jvi.25.1.37-41.1978

Synthesis of polynucleotide 5'-triphosphatase in vaccinia virus-infected HeLa cells.

D J Tutas, E Paoletti
PMCID: PMC353898  PMID: 621780

Abstract

Synthesis of polynucleotide 5'-triphosphatase, which is presumably involved in the initial modification in the series of reactions by which 5'-termini of vaccinia mRNA become capped and methylated, has been demonstrated in vaccinia virus infected HeLa cells. Synthesis of the enzyme is prevented by actinomycin D and cycloheximide, suggesting that both de novo DNA-dependent RNA and protein syntheses are required. On the other hand, cytosine arabinoside, an inhibitor of viral DNA replication, does not prevent induction of the enzyme. The latter observation, together with the kinetics of synthesis of the enzyme in vaccinia virus-infected HeLa cells, suggests that polynucleotide 5'-triphosphatase is an "early" or prereplicative viral protein. Immunologlobulin produced against the purified virion-associated polynucleotide 5'-triphosphatase as antigen neutralized the activity of the induced polynucleotide 5'-triphosphatase, thus indicating the identity of the two enzymes.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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