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. 1994 Aug 2;91(16):7558–7562. doi: 10.1073/pnas.91.16.7558

A human oncogene of the RAS superfamily unmasked by expression cDNA cloning.

A M Chan 1, T Miki 1, K A Meyers 1, S A Aaronson 1
PMCID: PMC44441  PMID: 8052619

Abstract

As an approach to identify human oncogenes, we generated an expression cDNA library from an ovarian carcinoma line. A potent transforming gene was detected by transfection analysis and identified as TC21, a recently cloned member of the RAS gene superfamily. A single point mutation substituting glutamine for leucine at position 72 was shown to be responsible for activation of transforming properties. While the cDNA clone possessed high transforming activity, the ovarian tumor genomic DNA, which contained the mutated TC21 allele, failed to induce transformed foci. Thus, expression cDNA cloning made it possible to identify and isolate a human oncogene that has evaded detection by conventional approaches.

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Selected References

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