The Ser124 site of Cdc25A is required for Cdc25A degradation in response to I3C induction. The Ser124 site of Cdc25A is required for Cdc25A degradation.

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The Ser124 site of Cdc25A is required for Cdc25A degradation in response to I3C induction. The Ser124 site of Cdc25A is required for Cdc25A degradation in response to I3C induction. A, a sketch for multiple pathways related to Chk1, Smad3, and Chk2 regulating Cdc25A degradation (23–25). B, Dox-induced expression of Cdc25A and its derivatives. The wild-type Cdc25A cDNA from MCF10A cells was cloned into the pCDNA4/TO vector with Tet-on system, and each mutated derivative, Cdc25AS76A, Cdc25AS82A, and Cdc25AS124A, in the vectors was constructed according to the procedures described in Materials and Methods. In cultured medium with 10 ng/mL Dox, Cdc25A and its derivatives were effectively induced. C and D, response of the mutant Cdc25A derivatives to I3C treatment in MDA-MB-231 breast cancer cells (C) and MDA-MB-468 breast cancer cells (D). Cell lysates were prepared and Western blot analysis was done with the indicated Cdc25A and control antibodies. Representative data from one experiment are shown (n = 3). Yongsheng Wu et al. Cancer Prev Res 2010;3:818-828 ©2010 by American Association for Cancer Research