Transcriptional corepressor that binds to a number of transcription factors. Inhibits the transcriptional activation mediated by CTNNB1 and TCF family members in Wnt signaling. The effects of full-length TLE family members may be modulated by association with dominant-negative AES (By similarity). Homotetramer and heterooligomer with other family members. Binds LEF1, TCF7, TCF7L1, TCF7L2 and FOXA2. Interacts with XIAP/BIRC4 and TCF7L2/TCF4. Interacts with TBX18 (via engrailed homology 1 repressor motif), leading to decreased of TBX18 transcriptional activity. Highly expressed in adrenal gland, small intestine, kidney, lung, ovary and thyroid. Detected at lower levels in pituitary, hippocampus, cortex, cerebellum and testis. By kainic acid in the dentate gyrus. WD repeat Groucho/TLE family members are characterized by 5 regions, a glutamine-rich Q domain, a glycine/proline-rich GP domain, a central CcN domain, containing a nuclear localization signal, and a serine/proline-rich SP domain. The most highly conserved are the N-terminal Q domain and the C-terminal WD-repeat domain. Ubiquitinated by XIAP/BIRC4. This ubiquitination does not affect its stability, nuclear localization, or capacity to tetramerize but inhibits its interaction with TCF7L2/TCF4 (By similarity). Belongs to the WD repeat Groucho/TLE family.