| Sign In to gain access to subscriptions and/or personal tools. |
Novel Promoter I.8 and Promoter Usage in the CYP19 (Aromatase) Gene
1 Northwestern University
* To whom correspondence should be addressed. E-mail: s-bulun{at}northwestern.edu.
To date, 10 promoters were reported to regulate the expression of the human aromatase (CYP19) gene, giving rise to transcripts with an identical coding region but tissue-specific first exons comprising unique 5'-untranslated regions. We describe the identification and characterization of a new CYP19 exon I, designated exon I.8, in a 5'-rapid amplification of complementary DNA ends–generated library of human THP-1 monocytic cells. A construct containing exon I.8 and its 5'-flanking sequence was sufficient to drive transcription in THP-1 cells. This novel promoter was located approximately 2-kb upstream of promoter I.4 and approximately 75-kb upstream of the common splice junction. We detected several I.8-containing splice variants, 2 of which also contained a sequence from exon I.4. Analysis of human tissues revealed a unique pattern of promoter I.8 usage. The placenta contained the highest level of I.8-specific transcripts. This work underscores the complexity of the mechanisms that regulate normal and pathologic aromatase expression.
First published on October 27, 2008, doi:10.1177/1933719108322441 This article has been cited by other articles:
|
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||


