Predicted to enable mRNA binding activity. Involved in several processes, including determination of adult lifespan; hyperosmotic response; and nematode larval development. Located in cytoplasmic stress granule and nucleus. Expressed in several structures, including mechanosensory neurons. Is an ortholog of human TIA1 (TIA1 cytotoxic granule associated RNA binding protein) and TIAL1 (TIA1 cytotoxic granule associated RNA binding protein like 1).