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Proceedings of the National Academy of Sciences of the United States of America logoLink to Proceedings of the National Academy of Sciences of the United States of America
. 1976 Sep;73(9):3136–3140. doi: 10.1073/pnas.73.9.3136

Interferon-induced inhibition of protein synthesis in L-cell extracts: an ATP-dependent step in the activation of an inhibitor by double-stranded RNA.

W K Roberts, M J Clemens, I M Kerr
PMCID: PMC430957  PMID: 184463

Abstract

The translation of encephalomyocarditis virion RNA in extracts from interferon-treated L-cells is inhibited by the addition of double-stranded RNA (dsRNA) at 400 ng/ml. A similar inhibition in response to dsRNA is seen in control cell extracts supplemented with small amounts of a postribosomal supernatant fraction from interferon-treated cells (interferon cell sap): Neither interferon cell sap nor dsRNA alone is inhibitory in control systems. The inhibition is much reduced if translation is carried out at low ATP concentrations.Conversely, the inhibitory capacity of the interferon cell sap is increased 100-fold if it is preincubated with dsRNA and ATP prior to its addition to the protein-synthesizing system. After this preincubation all detectable dsRNA can be removed without any diminution of the inhibitory activity of the cell sap. These results are compatible with a two-step model for the inhibition in which a pre-inhibitor is activated by dsRNA, the activated inhibitor then interacting with the protein synthesis system to inhibit translation.

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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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