Neuronal calcium sensor, regulator of G protein-coupled receptor phosphorylation in a calcium dependent manner (By similarity). Regulates neurite extension and branching by activity-dependent Ca(2+) influx in growth cones. In pedal neurons, higher expression in secondary neurites, perikarya, growth cones and branch points than in primary neurites. Binds 3 calcium ions via the second, third and fourth EF-hand. Belongs to the recoverin family.