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. 1977 Aug;74(8):3399–3403. doi: 10.1073/pnas.74.8.3399

Levels of translatable mRNAs for cell surface protein, collagen precursors, and two membrane proteins are altered in Rous sarcoma virus-transformed chick embryo fibroblasts.

S L Adams, M E Sobel, B H Howard, K Olden, K M Yamada, B de Crombrugghe, I Pastan
PMCID: PMC431579  PMID: 198783

Abstract

Transformation of chick embryo fibroblasts by Rous sarcoma virus results in decreased amounts of a major cell surface protein and of collagen. To determine the mechanism accounting for the decreased production of these proteins, we have measured the relative amounts of functional mRNAs for these and other transformation-sensitive proteins. Total cellular RNAs extracted from normal cells and from cells transformed by the Schmidt-Ruppin strain of Rous sarcoma virus were translated in a cell-free system derived from wheat germ. Analysis of the in vitro translation products of RNAs from normal and transformed chick embryo fibroblasts shows a 5-fold reduction in the translatable mRNA for cell surface protein and a 10-fold reduction in translatable mRNA for two collagen precursors. In addition, increases in functional mRNA are observed for myosin and for two membrane polypeptides with molecular weights of 95,000 and 78,000; the latter two proteins increase on transformation, but the increases are in large part secondary to the depletion of glucose from the medium of transformed cells. Our data suggest that some of the major cellular changes induced by oncogenic viruses are due to changes in the activity of specific cellular genes.

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Selected References

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