Interferon-dependent induction of mRNA activity for (2′–5′)oligo-isoadenylate synthetase
- 1 November 1980
- journal article
- research article
- Published by Springer Nature in Nature
- Vol. 288 (5786) , 98-100
- https://doi.org/10.1038/288098a0
Abstract
At least three different enzymes involved in the regulation of protein synthesis are induced in a variety of cells by interferon (IFN)1–5. Sensitive assays for these enzymes have been developed and used to establish the specificity, dose dependence and time course of their induction by IFN5–8. One of these enzymes, the oligo-isoadenylate synthetase E, whose product (2′–5′)pppApApA9 activates the latent ribonuclease F10–11, is increased over 50-fold after IFN treatment. We describe here the assay for an mRNA from IFN-treated mouse L cells, that produces oligo-isoadenylate synthetase activity when injected into Xenopus oocytes. This mRNA is found in the cells only after exposure to IFN. The mRNA increases in mouse L cells with the same time course as the enzyme activity itself. In particular, there is a 3-h lag period between IFN addition and the onset of enzyme and mRNA accumulation. Using anti-IFN antibodies, we show that during this lag period the continued interaction of IFN with the cells is necessary for the full induction of the oligo-isoadenylate synthetase.This publication has 16 references indexed in Scilit:
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