The transactivating domain of the c-Jun proto-oncoprotein is required for cotransformation of rat embryo cells

Academic Article


  • The nuclear phosphoprotein c-Jun, encoded by the proto-oncogene c-jun, is a major component of the AP-1 complex. A potent transcriptional regulator, c- jun is also able to transform normal rat embryo cells in cooperation with an activated c-Ha-ras gene. By deletion analysis, we identified the regions of c-Jun encoding transformation and transactivation functions. Our studies indicate that there is a direct correlation between the ability of the c-Jun protein to activate transcription and cotransform rat embryo cells. The regions involved in these functions include the conserved leucine zipper/DNA binding domain and an effector domain near its N terminus. This N-terminal region spans amino acids 61 to 146 of the c-Jun protein and is highly conserved among all Jun family members. These results support the hypothesis that c-Jun transforms cells by stimulating the expression of transformation- mediating genes.
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    Digital Object Identifier (doi)

    Author List

  • Alani R; Brown P; Binetruy B; Dosaka H; Rosenberg RK; Angel P; Karin M; Birrer MJ
  • Start Page

  • 6286
  • End Page

  • 6295
  • Volume

  • 11
  • Issue

  • 12