Ras-related protein Rab-32 (RAB32)

Ras-related protein Rab-32 (RAB32) is a member of the Ras superfamily of small GTPases that functions as a molecular switch regulating intracellular vesicle trafficking, particularly between organelles such as mitochondria, Golgi, lysosomes, and melanosomes. It also acts as an A-kinase anchoring protein (AKAP), targeting protein kinase A (PKA) to mitochondria and spatially coordinating PKA-dependent phosphorylation events. Rab32 is essential for mitochondrial fission, autophagy, and the biogenesis of specialized organelles like melanosomes, and it is a substrate and effector of kinases such as LRRK2. Genetic mutations in RAB32 are linked to rare familial forms of Parkinson’s disease (PARK26) and susceptibility to leprosy and pigmentation defects. Rab32 also modulates cell migration and invasion via effects on the Golgi apparatus, and interacts with regulatory proteins such as optineurin[1][2][3][4].

Other names

Ras-related protein Rab-32RAB32PARK26Member RAS oncogene familyrab-32

Not directly targeted by drugs; however, mechanistically, Rab32 is involved in: - Anchoring and localization of protein kinase A (PKA) and facilitating substrate phosphorylation by PKA[2][3]. - Regulating mitochondrial dynamics, Golgi positioning, and vesicular trafficking. - Interacts with LRRK2, which is targeted in Parkinson’s disease research; Rab32 may be phosphorylated by or interact with kinases[1].