Phosphodiesterase 6-delta (PDE6D)

Phosphodiesterase 6-delta is a soluble protein originally identified as the delta subunit within the rod cell-specific cGMP phosphodiesterase complex involved in visual phototransduction. Beyond its role in vision, it acts as a specific transport factor for certain prenylated proteins—including members of the Ras superfamily—by binding their farnesyl or geranylgeranyl groups and facilitating their intracellular localization. This chaperone function is critical for proper membrane association and signaling activity of these small GTPases. Inhibitors targeting PDE6D’s prenyl-binding pocket can disrupt oncogenic K-Ras trafficking and signaling, making it a potential therapeutic target in cancer. Additionally, modulation of its activity has been implicated in ocular diseases such as glaucoma through effects on intraocular pressure regulation. The protein is widely expressed beyond retinal tissue and participates broadly in cellular processes involving lipid-modified protein transport.

Other names

PDE delta subunitPDEδJBTS22PDEDphosphodiesterase 6D

Inhibition of prenyl-binding pocket to block trafficking and function of prenylated proteins such as K-Ras