Actin-binding protein that regulates actin polymerization, filopodia dynamics and increases the branching of proximal dendrites of developing neurons. Interacts with F-actin (By similarity). Interacts with G-actin (By similarity). Localizes to somata and dendrites in cortical neurons (By similarity). Colocalizes with G- and F-actin in lamellipodia (By similarity). Colocalizes in the nucleus with PTK2 (By similarity). Depletion of ABITRAM by siRNA or neutralizing antibodies results in cell death within a few hours. Belongs to the ABITRAM family.