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Molecular and Cellular Biology, May 1999, p. 3600-3606, Vol. 19, No. 5
0270-7306/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.

Identification of the Novel Player delta EF1 in Estrogen Transcriptional Cascades

Elaine M. Chamberlain and Michel M. Sanders*

Department of Biochemistry, Molecular Biology, and Biophysics, University of Minnesota, Minneapolis, Minnesota

Received 19 January 1999/Accepted 26 February 1999

Although many genes are regulated by estrogen, very few have been shown to directly bind the estrogen receptor complex. Therefore, transcriptional cascades probably occur in which the estrogen receptor directly binds to a target gene that encodes another transcription factor that subsequently regulates additional genes. Through the use of a differential display assay, a transcription factor has been identified that may be involved in estrogen transcriptional cascades. This report demonstrates that transcription factor delta EF1 is induced eightfold by estrogen in the chick oviduct. Furthermore, the regulation by estrogen occurs at the transcriptional level and is likely to be a direct effect of the estrogen receptor complex, as it does not require concomitant protein synthesis. A putative binding site was identified in the 5'-flanking region of the chick ovalbumin gene identifying it as a possible target gene for regulation by delta EF1. Characterization of this binding site revealed that delta EF1 binds to and regulates the chick ovalbumin gene. Thus, a novel regulatory cascade that is triggered by estrogen has been defined.

* Corresponding author. Mailing address: Department of Biochemistry, Molecular Biology, and Biophysics, University of Minnesota, 435 Delaware St. SE, Minneapolis, MN 55455. Phone: (612) 624-9637. Fax: (612) 625-2163. E-mail: sande001{at}tc.umn.edu.

Molecular and Cellular Biology, May 1999, p. 3600-3606, Vol. 19, No. 5
0270-7306/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.


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