Acts as a transcriptional regulator (By similarity). Regulates expression of various genes, including homeobox protein unc-42 and helix-loop-helix protein hlh-34 (PubMed:32273286). Required for embryonic viability, neuromuscular development, organization of the nerve ring and neuronal cell body location (PubMed:32273286). Regulates AIY neuron axon morphology and cell fate (PubMed:32273286). Plays a role in cell autonomously establishing a neuronal left-right asymmetry (PubMed:21041366). Involved in regulating glial specification (PubMed:32665354). Interacts with hlh-2; the interaction is direct. Expressed in the early embryo in ABpra/p and MSpa/p cells, with weaker expression in ABar descendants (PubMed:32273286). Expressed left-right asymmetrically in the embryo, in the mother cell to the MI pharyngeal motorneuron but not the mother cell of the e3D epithelial cell (PubMed:21041366).