Title : Adrenocorticotropin/cyclic adenosine 3',5'-monophosphate-mediated transcription of the human CYP17 gene in the adrenal cortex is dependent on phosphatase activity.

Pub. Date : 2002 May

PMID : 11956159






5 Functional Relationships(s)
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1 Further, both okadaic acid and peroxyvanadate attenuate cAMP-stimulated increases in endogenous hCYP17 mRNA expression and in hCYP17 promoter-reporter construct luciferase activity. Cyclic AMP cytochrome P450 family 17 subfamily A member 1 Homo sapiens
2 Adrenocorticotropin/cyclic adenosine 3",5"-monophosphate-mediated transcription of the human CYP17 gene in the adrenal cortex is dependent on phosphatase activity. Cyclic AMP cytochrome P450 family 17 subfamily A member 1 Homo sapiens
3 Using inhibitors of serine/threonine phosphatase activity (okadaic acid) and phosphotyrosine phosphatase activity (peroxyvanadate), we can inhibit the cAMP-inducible binding of the steroidogenic factor-1 (SF-1), p54(nrb)/NonO, and polypyrimidine tract-binding protein-associated splicing factor (PSF) complex required for regulation of transcription to the promoter of hCYP17. Cyclic AMP cytochrome P450 family 17 subfamily A member 1 Homo sapiens
4 Further, both okadaic acid and peroxyvanadate attenuate cAMP-stimulated increases in endogenous hCYP17 mRNA expression and in hCYP17 promoter-reporter construct luciferase activity. Cyclic AMP cytochrome P450 family 17 subfamily A member 1 Homo sapiens
5 Our findings demonstrate that activation of protein phosphatase(s) is essential for cAMP-dependent transcription of hCYP17 in H295R cells and suggest a role for PKA in phosphatase activation, which leads to dephosphorylation of SF-1 and increased gene transcription. Cyclic AMP cytochrome P450 family 17 subfamily A member 1 Homo sapiens