Transcriptional corepressor that binds to a number of transcription factors. Enhances the transcriptional repression activity of pnx. Interacts with pnx (PubMed:12642490). Interacts with the WRPW motif of ripply1 (PubMed:16326386). Interacts with tcf7l1a (PubMed:25371059). Interacts (via C-terminus) with lbx2 (via N-terminus) (PubMed:25371059). Expressed ubiquitously during gastrulation. Expressed in the entire presomitic mesoderm, including the tailbud, throughout somitogenesis. Also expressed diffusely within whole somites in young stages. In older stages, expression is restricted to boundaries between somites. Also expressed in a dynamic manner within the neural plate. Expressed both maternally and zygotically. Expression decreases from the mid-blastula stages onwards before increasing again at the start of gastrulation. Ubiquitinated by XIAP/BIRC4. Belongs to the WD repeat Groucho/TLE family.