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- W1566112234 abstract "The chicken CT10 virus oncogene product, P47gag-crk, contains SH2/SH3 domains that have been identified as conserved domains among proteins involved in signal transduction. We studied the functional similarity of the SH2/SH3 domains by replacing those of v-Crk with those of phosphatidylinositol-specific phospholipase C-gamma, v-Src, or c-Src. The transforming activity of v-Crk was partially retained in a mutant with a v-Src SH3 domain but not in the other mutants with heterologous SH2/SH3 domains. Mutant viruses with Crk-SH2/SH2' domains induced tyrosine phosphorylation of cellular proteins, but mutants with phosphatidylinositol-specific phospholipase C-gamma or Src SH2/SH2' domains did not. However, the mutant proteins with heterologous SH2/SH2' regions were able to weakly associate with some phosphotyrosine-containing proteins in vitro. These results indicate that in the context of the P47gag-crk structure, the requirement of Crk-SH2/SH3 is more stringent for its activity to induce cell transformation than to cause phosphorylation of cellular proteins. The substitution with heterologous sequences least perturbs the capacity to bind phosphotyrosine-containing proteins. In each case, the SH3 domain is more flexible to substitution than is the SH2 domain." @default.
- W1566112234 created "2016-06-24" @default.
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- W1566112234 date "1992-01-01" @default.
- W1566112234 modified "2023-09-26" @default.
- W1566112234 title "Biological and biochemical activity of v-Crk chimeras containing the SH2/SH3 regions of phosphatidylinositol-specific phospholipase C-gamma and Src" @default.
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- W1566112234 doi "https://doi.org/10.1128/jvi.66.1.115-121.1992" @default.
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