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Abstract p53 has a role in many cellular processes through the transcriptional regulation of target genes. PAC1 (phosphatase of activated cells 1; also known as dual specificity phosphatase 2, DUSP2) is a dual threonine/tyrosine phosphatase that specifically dephosphorylates and inactivates mitogen-activated protein (MAP) kinases. Here we show that during apoptosis, p53 activates transcription of PAC1 by binding to a palindromic site in the PAC1 promoter. PAC1 transcription is induced in response to serum deprivation and oxidative stress, which results in p53-dependent apoptosis, but not in response to gamma-irradiation, which causes cell cycle arrest. Reduction of PAC1 transcription using small interfering RNA inhibits p53-mediated apoptosis, whereas overexpression of PAC1 increases susc......
来源出处
Yin Y*, Liu YX, Jin YJ, Hall EJ, Barrett JC. PAC1 phosphatase is a transcriptio…
http://218.241.158.84:8088/Research/Articles/index777.shtml
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