Recognizes the DNA sequence 5'-ATTAA-3' (By similarity). Transcriptional repressor (By similarity). Activator of WNT-mediated transcription in conjunction with CTNNB1 (PubMed:20028982). Establishes anterior identity at two levels; acts early to enhance canonical WNT-signaling by repressing expression of TLE4, and acts later to inhibit NODAL-signaling by directly targeting NODAL (By similarity). May play a role in hematopoietic differentiation (PubMed:8096636). Interacts with CD81; the interaction prevents nuclear translocation of HHEX (By similarity). Interacts (via N-terminus) with SOX13; abolishes the SOX13-mediated inhibition of WNT-mediated transcriptional activity via competitive inhibition of the SOX13-TCF7 complex (PubMed:20028982). Liver and promyelocytic leukemia cell line HL-60. Expressed during hematopoiesis.