Ras-related protein Rab-26 (RAB26)

Ras-related protein Rab-26 (RAB26) is a member of the small GTPase superfamily, in the Rab protein family, and acts as a crucial regulator of intracellular membrane trafficking. It functions by cycling between inactive (GDP-bound) and active (GTP-bound) forms, recruiting downstream effectors essential for vesicle formation, movement, tethering, and fusion[3][8]. RAB26 is specifically associated with clusters of synaptic vesicles in neuronal processes, where it links these vesicles to the autophagy pathway, selectively directing synaptic and secretory vesicles into preautophagosomal structures[1]. It regulates the trafficking of α2-adrenergic receptors (ADRA2A and ADRA2B) from the Golgi to the plasma membrane[4], and has roles in secretion pathways in glandular tissues such as the stomach and parotid gland[3]. In cancer biology, overexpression of RAB26 has been shown to suppress migration and invasion of breast cancer cells through promoting autophagic degradation of activated Src kinase[2]. RAB26 has no currently known approved therapeutic agents, biomarkers, or established roles as a clinical drug target, but is considered an important research target for modulating vesicle trafficking and autophagy in neuronal and cancer biology contexts[2][1][3][4][10].

Other names

RAB26V46133member RAS oncogene family

Not applicable (no drugs targeting RAB26 identified); mechanistically implicated in vesicle trafficking, autophagy, and membrane protein transport