Involved in postimplantation and gastrulation stages of development (By similarity). Binds to DNA and RNA (By similarity). Involved in the nucleocytoplasmic shuttling of STAU2. Interacts with STAU2. Found in a cytoplasmic mRNP complex with STAU2. Does not interact with STAU1. Localizes in somatodendritic compartment of primary hippocampal neurons. Colocalizes with STAU2 in several cytosolic RNA granules. Associated with chromosome foci in meiotic cells (By similarity). Expressed in hippocampus.