Actin-binding protein that regulates actin polymerization, filopodia dynamics and increases the branching of proximal dendrites of developing neurons. Interacts with F-actin (PubMed:24782708). Interacts with G-actin (PubMed:24782708). Localizes to somata and dendrites in cortical neurons. Colocalizes with G- and F-actin in growth cones and proximal dendrites (PubMed:24782708). Colocalizes in the nucleus with PTK2 (PubMed:24782708). Detected (at protein level) in liver, lung, heart, spleen, kidney, and ovaries. In brain expression is higher in the hippocampus, the nuclear layer of the cerebellum, the cortex and the caudoputamen. Belongs to the ABITRAM family. Extended N-terminus.