Transcriptional corepressor that functions with the neural specificity gene unc-4 to govern motor neuron identity (PubMed:9165118). May function with transcription factor mls-1 to promote uterine muscle specification and formation (PubMed:21852953). Interacts with unc-4 (PubMed:10557206). May interact with mls-1 (PubMed:21852953). Maternal effect embryonic lethal. RNAi-mediated knockdown results in reduced uterine cell specification. Belongs to the WD repeat Groucho/TLE family.