Probable transcription coregulator (PubMed:16824957). Required for asymmetric cell divisions of the T hypodermal cells, and cell fate determination, in concert with homeobox proteins nob-1 and ceh-20 (PubMed:16824957). Acts downstream of the Wnt signaling pathway, and of ceh-20 and nob-1 (PubMed:16824957). Interacts with homeobox protein ceh-20; the interaction is direct, facilitates nuclear localization of ceh-20 and may stabilize interaction of a ceh-20-nob-1 complex with DNA. Expressed in the T cell, head neurons, posterior gut cells, hypodermal cells (hyp7, hyp9, and hyp10), and P blast cells (PubMed:16824957). During T cell division, expressed asymmetrically, becoming up-regulated in posterior daughter cells (PubMed:16824957). RNAi-mediated knockdown results in absence of phasmid socket cells.