Predicted to enable RNA binding activity. Predicted to be a structural constituent of ribosome. Acts upstream of or within brain development and chordate embryonic development. Predicted to be located in cytoplasm; nucleolus; and ribosome. Predicted to be part of cytosolic small ribosomal subunit and small-subunit processome. Orthologous to several human genes including RPS4X (ribosomal protein S4 X-linked).