Girdin (CCDC88A)

Plays a role as a key modulator of the AKT-mTOR signaling pathway controlling the speed of the process of toddlers integration during adult neurogenesis, including proper neuron placement, dendritic growth and synapse formation (By similarity). Improves phosphoinositide 3-kinase (PI3K)- dependent phosphorylation and kinase activity of AKT1/PKB, but does not have kinase activity itself (By similarity).

Phosphorylation of AKT1/PKB thereby induces the phosphorylation of downstream effectors GSK3 and FOXO1/FKHR, and regulates DNA replication and cell proliferation (By similarity). Critical for the integrity of the actin cytoskeleton and for cell migration (PubMed:16139227).