C-Jun-amino-terminal kinase-interacting protein 3 (MAPK8IP3)

The JNK-interacting protein (JIP) group of scaffold proteins selectively mediates JNK signaling by aggregating specific components of the MAPK cascade to form a functional JNK signaling module (PubMed:12189133). May function as a regulator of vesicle transport, through connections with the JNK-signaling parts and motor proteins (By similarity).

Promotes neuronal axon elongation in a kinesin- and JNK-dependent method. Activates cofilin in axon tips via local activation of JNK, thereby regulating filopodial dynamics and enhancing axon elongation.