Alternative products:Additional isoforms seem to exist ,Domain:Proline-rich and acidic regions are implicated in the activation functions of RNA polymerase II transcription factors. ,Function:Participates in the Wnt signaling pathway. Activates transcription of target genes in the presence of CTNNB1 and EP300. May play a role in hair cell differentiation and follicle morphogenesis. TLE1 , TLE2 , TLE3 and TLE4 repress transactivation mediated by LEF1 and CTNNB1. Regulates T-cell receptor alpha enhancer function. Binds DNA in a sequence-specific manner. PIAG antagonizes both Wnt-dependent and Wnt-independent activation by LEF1 (By similarity) . Isoform 3 lacks the CTNNB1 interaction domain and may be an antagonist for Wnt signaling. ,similarity:Belongs to the TCF/LEF family. ,similarity:Contains 1 HMG box DNA-binding domain. ,subcellular location:Found in nuclear bodies upon PIASG binding. ,subunit:Binds the armadillo repeat of CTNNB1 and forms a stable complex. Interacts with EP300 , TLE1 and PIASG (By similarity) . Binds THOC4 , MDFI and MDFIC. ,tissue specificity:Detected in thymus. Not detected in normal colon , but highly expressed in colon cancer biopsies and colon cancer cell lines. ,
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