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Molecular and Cellular Biology, August 2005, p. 7144-7157, Vol. 25, No. 16
0270-7306/05/$08.00+0     doi:10.1128/MCB.25.16.7144-7157.2005
Copyright © 2005, American Society for Microbiology. All Rights Reserved.

Positive and Negative Regulation of the Transforming Growth Factor ß/Activin Target Gene goosecoid by the TFII-I Family of Transcription Factors

Manching Ku,1 Sergei Y. Sokol,2 Jack Wu,1 Maria Isabel Tussie-Luna,3 Ananda L. Roy,3* and Akiko Hata1*

Molecular Cardiology Research Institute, Tufts-New England Medical Center and Department of Biochemistry,1 Department of Pathology, Tufts University School of Medicine, Boston, Massachusetts 02111,3 Department of Molecular, Cell, and Developmental Biology, Mount Sinai Medical Center, One Gustave L. Levy Place, Box 1020, New York, NY 100292

Received 30 November 2004/ Returned for modification 14 February 2005/ Accepted 23 May 2005

Goosecoid (Gsc) is a homeodomain-containing transcription factor present in a wide variety of vertebrate species and known to regulate formation and patterning of embryos. Here we show that in embryonic carcinoma P19 cells, the transcription factor TFII-I forms a complex with Smad2 upon transforming growth factor ß (TGFß)/activin stimulation, is recruited to the distal element (DE) of the Gsc promoter, and activates Gsc transcription. Downregulation of endogenous TFII-I by small inhibitory RNA in P19 cells abolishes the TGFß-mediated induction of Gsc. Similarly, Xenopus embryos with endogenous TFII-I expression downregulated by injection of TFII-I-specific antisense oligonucleotides exhibit decreased Gsc expression. Unlike TFII-I, the related factor BEN (binding factor for early enhancer) is constitutively recruited to the distal element in the absence of TGFß/activin signaling and is replaced by the TFII-I/Smad2 complex upon TGFß/activin stimulation. Overexpression of BEN in P19 cells represses the TGFß-mediated transcriptional activation of Gsc. These results suggest a model in which TFII-I family proteins have opposing effects in the regulation of the Gsc gene in response to a TGFß/activin signal.


* Corresponding author. Mailing address for Akiko Hata: Molecular Cardiology Research Institute, Tufts-New England Medical Center, 750 Washington Street, Box 8486, Boston, MA 02111. Phone: (617) 636-0614. Fax: (617) 636-5649. E-mail: akiko.hata{at}tufts.edu. Mailing address for Ananda L. Roy: Department of Pathology, Tufts University School of Medicine, Boston, MA 02111. Phone: (617) 636-6715. Fax: (617) 636-2990. E-mail: ananda.roy{at}tufts.edu.


Molecular and Cellular Biology, August 2005, p. 7144-7157, Vol. 25, No. 16
0022-538X/05/$08.00+0     doi:10.1128/MCB.25.16.7144-7157.2005
Copyright © 2005, American Society for Microbiology. All Rights Reserved.




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