Genome-wide pattern of TCF7L2/TCF4 chromatin occupancy in colorectal cancer cells.

P. Hatzis, L.G. van der Flier, M.A. van Driel, V. Guryev, F. Nielsen, S. Denissov, I.J. Nijman, J. Koster, E.E. Santo, W. Welboren, R. Versteeg, M.L. van de Wetering, H. Clevers, H.G. Stunnenberg

Onderzoeksoutput: Bijdrage aan wetenschappelijk tijdschrift/periodieke uitgaveArtikelWetenschappelijkpeer review

Samenvatting

Wnt signaling activates gene expression through the induced formation of complexes between DNA-binding T-cell factors (TCFs) and the transcriptional coactivator beta-catenin. In colorectal cancer, activating Wnt pathway mutations transform epithelial cells through the inappropriate activation of a TCF7L2/TCF4 target gene program. Through a DNA array-based genome-wide analysis of TCF4 chromatin occupancy, we have identified 6,868 high-confidence TCF4-binding sites in the LS174T colorectal cancer cell line. Most TCF4-binding sites are located at large distances from transcription start sites, while target genes are frequently "decorated" by multiple binding sites. Motif discovery algorithms define the in vivo-occupied TCF4-binding site as evolutionarily conserved A-C/G-A/T-T-C-A-A-A-G motifs. The TCF4-binding regions significantly correlate with Wnt-responsive gene expression profiles derived from primary human adenomas and often behave as beta-catenin/TCF4-dependent enhancers in transient reporter assays.
Originele taal-2Engels
Pagina's (van-tot)2732-2744
TijdschriftMolecular and Cellular Biology
Volume28
Nummer van het tijdschrift8
DOI's
StatusGepubliceerd - 2008

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