The first step to the synthesis of all steroids is catalyzed by P450scc. We constructed nine deletion mutants of the 5′-region of the P450scc gene and connected them to a CAT reporter gene to assay transcriptional activity of the P450scc promoter. A short 145 bp fragment stimulated transcriptionaby two fold. This DNA was active in all cells tested irrespective of their tissue origin and steroidogenic activity. DNA at -145 -573 of the upstream region did not increase transcription any further. DNA including 2500 bp of the upstream region stimulated transcription by 10 fold only in adrenal Y-1 cells. Hence in the -145 region contains a low level P450scc promoter and the 2500 bp DNA possesses an adrenal specific enhancing element.
|ジャーナル||Biochemical and Biophysical Research Communications|
|出版ステータス||出版済み - 4 14 1989|
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