Beta-catenin–TCF protein-protein interaction

The Beta-catenin–TCF protein-protein interaction is a critical molecular event at the core of the canonical Wnt signaling pathway. In this pathway, stabilized Beta-catenin (encoded by CTNNB1) translocates into the nucleus, where it interacts directly with TCF/LEF family transcription factors (including TCF7, TCF7L1, TCF7L2, LEF1). This interaction converts TCF/LEF from transcriptional repressors to activators of target genes that regulate cell proliferation, differentiation, stem cell renewal, and oncogenesis[1][2][3][4]. Disruption of this interaction is a therapeutic target in cancers (especially colorectal, liver, and other solid tumors) featuring aberrant Wnt/Beta-catenin signaling. Multiple small molecules and peptides have been developed to specifically block the Beta-catenin–TCF interaction and thereby inhibit downstream gene expression. Because this protein-protein interaction is essential for normal stem cell function and tissue repair, there are significant safety concerns with its inhibition, notably risk to GI, skin, and hematopoietic homeostasis[3].

Other names

CTNNB1–TCF interactionBeta-catenin–TCF/LEF interactionBeta-catenin–Tcf/Lef complexBeta-catenin–Tcf family interaction

Inhibition of Beta-catenin binding to TCF to block Wnt/beta-catenin pathway–driven gene transcription; Disruption of Beta-catenin/TCF complex formation