Abstract
To identify genes that are stimulated by oncogenic forms of mutant p53, we studied, by microarray analysis and PCR-select subtractive hybridization, gene expression changes in human wild-type (wt) p53-negative immortal 041 fibroblasts infected to stably express p53 mutant 175H. In contrast to the wt p53 transactivator, 175H induced only few and weak, gene expression changes. We report here the stimulation of calmodulin 2 (CaM 2), but not CaM 1 or 3, gene expression specifically in 041 cells. The stimulation of the CaM 2 promoter required the 5' untranslated sequences as well as the integrity of the transactivation domain of 175H. However, direct binding of 175H to the 5'UT in vitro could not be demonstrated.
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