Different structural alterations upregulate in vitro tyrosine kinase activity and transforming potency of the erbB-2 gene. |
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| Authors: | O Segatto C R King J H Pierce P P Di Fiore S A Aaronson |
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| Affiliation: | Laboratory of Cellular and Molecular Biology, National Cancer Institute, Bethesda, Maryland 20892. |
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| Abstract: | Compared with normal erbB-2 gp185, mutant erbB-2 proteins generated by mutations either in the transmembrane domain or by NH2-terminal deletion are able to transform NIH 3T3 cells at a 10- to 100-fold greater efficiency. Mutant proteins of both classes show increased tyrosine kinase activity, suggesting that an abnormal level of receptor-associated tyrosine kinase activity is a major determinant of erbB-2 oncogenic potential. |
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