In neurons, p35/CDK5 (cyclin-dependent like kinase 5) phosphorylates Ras-specific guanine nucleotide-releasing factor-2 (RASGRF2), thereby modulating Rac-dependent extracellular signal-regulated kinase (ERK1/2) activity and microtubule-associated protein-1b distribution. RASGRF2 is also involved in T-cell signaling. Presence of RASGRF2 in T-cells activates Ras and stimulates the transcriptional factor NF- at (nuclear factor of activated T cells).
