Ras-related protein Rab-12 (RAB12)

Ras-related protein Rab-12 (RAB12) is a small GTPase enzyme belonging to the Ras superfamily, centrally involved in the regulation of intracellular membrane trafficking, including endocytic recycling, endosome to lysosome transport, and autophagy[2][5][6][9]. RAB12 cycles between inactive GDP-bound and active GTP-bound states, recruiting effectors that mediate vesicle formation, movement, and fusion[6]. Its phosphorylation by LRRK2 is particularly relevant in the brain and has been implicated in the pathogenesis of Parkinson's disease, where it regulates primary ciliogenesis and centrosome homeostasis in astrocytes[4][8]. RAB12 also participates in clathrin-independent endocytosis and the trafficking of cell surface receptors such as EGFR[2]. Dysfunction of Rab12 activity, such as defective prenylation or aberrant kinase regulation, leads to impaired autophagic flux and may contribute to neurodegenerative and other diseases[2][4][6].

Other names

RAB12, member RAS oncogene familyRAB12ras-related protein Rab-12putative Ras-related protein Rab-12

Drugs targeting LRRK2 may inhibit Rab12 phosphorylation and downstream cilia/centrosome defects; modulation of autophagy via Rab12 activity (no direct Rab12-targeting drugs presently clinically available)