Actin-binding protein that regulates actin polymerization, filopodia dynamics and increases the branching of proximal dendrites of developing neurons. May play a role in transcription regulation. Interacts with F-actin (By similarity). Interacts with G-actin (By similarity). Localizes to somata and dendrites in cortical neurons. Colocalizes with F- and G-actin in lamellipodia (By similarity). Colocalizes in the nucleus with PTK2 (By similarity). Belongs to the ABITRAM family.