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. 1969 Mar;3(3):297–303. doi: 10.1128/jvi.3.3.297-303.1969

Synthesis of Ribonucleic Acid in Cells Infected with LSc Poliovirus at Elevated Temperatures 1

Daniel R Tershak 1
PMCID: PMC375767  PMID: 4305673

Abstract

The synthesis of viral ribonucleic acid (RNA) was detected within 2 hr after infection with LSc poliovirus at 35 C. This RNA eluted as a single peak with 0.9 m NaCl on methylated albumin celite columns, was sensitive to ribonuclease, precipitated in the presence of 2 m LiCl, and had an S20 value at 34 ± 2 in linear sucrose gradients. When cells were infected at 39 to 40 C, there was also early synthesis of RNA. However, 2 hr after infection this synthesis was drastically inhibited. The absence of net RNA synthesis at 39 to 40 C during the late stages of infection was not caused by rapid degradation of newly formed RNA, since the RNA produced between 1 and 2 hr at 39 to 40 C was still present 3.5 hr after infection. There was a 3 log10 inhibition in the production of infectious virus when p-fluorophenylalanine was present in the medium at a concentration of 25 μg/ml. This concentration of analogue had little effect upon the production of viral polymerase and viral RNA. Virus grown in the presence of analogue at a concentration of 10 μg/ml exhibited increased heat sensitivity compared to control virus. However, viral polymerase exhibited no change in sensitivity to heat or manganese when cells were exposed to 25 μg of p-fluorophenylalanine per ml during infection. p-Fluorophenylalanine had a relatively selective effect on viral capsid protein but did not reverse the inhibition of synthesis of viral RNA at 39 to 40 C.

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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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