Anti-Ras-related protein Rab-8A RAB8A Antibody Picoband® Fluoro488 Conjugated

Ras-related protein Rab-8A is a protein that in humans is encoded by the RAB8A gene. It is mapped to 19p13.12. The protein encoded by this gene is a member of the RAS superfamily which are small GTP/GDP-binding proteins with an average size of 200 amino acids. The RAS-related proteins of the RAB/YPT family may play a role in the transport of proteins from the endoplasmic reticulum to the Golgi and the plasma membrane. RAB8A regulates cilia assembly by targeting and promoting fusion of vesicles near the ciliary membrane. This gene requires CEP290 for centrosome localization and that CEP290 regulates entry of RAB8A into the cilium during assembly of this organelle. RAB8A has been shown to interact with Optineurin and MAP4K2.

The small GTPases Rab are key regulators of intracellular membrane trafficking, from the formation of transport vesicles to their fusion with membranes. Rabs cycle between an inactive GDP-bound form and an active GTP-bound form that is able to recruit to membranes different sets of downstream effectors ly responsible for vesicle formation, movement, tethering and fusion. That Rab is involved in polarized vesicular trafficking and neurotransmitter release. Together with RAB11A, RAB3IP, the exocyst complex, PARD3, PRKCI, ANXA2, CDC42 and DNMBP promotes transcytosis of PODXL to the apical membrane initiation sites (AMIS), apical surface formation and lumenogenesis. Together with MYO5B and RAB11A participates in epithelial cell polarization. Plays an important role in ciliogenesis. Together with MICALL2, may also regulate adherens junction assembly. May play a role in insulin-induced transport to the plasma membrane of the glucose transporter GLUT4 and therefore play a role in glucose homeostasis. .

1. Entrez Gene: RAB8A RAB8A, member RAS oncogene family 2. Tsang, W. Y., Bossard, C., Khanna, H., Peranen, J., Swaroop, A., Malhotra, V., Dynlacht, B. D. CP110 suppresses primary cilia formation through its interaction with CEP290, a protein deficiency in human ciliary disease. Dev. Cell 15: 187-197, 2008. 3. Nimmo ER, Sanders PG, Padua RA, Hughes D, Williamson R, Johnson KJ (October 1991) . The MEL gene: a new member of the RAB/YPT class of RAS-related genes. Oncogene 6 (8) : 1347–51.

Cell membrane ; Lipid-anchor ; Cytoplasmic side . Golgi apparatus. Recycling endosome membrane. Cell projection, cilium. Cytoplasmic vesicle, phagosome. Cytoplasmic vesicle, phagosome membrane ; Lipid-anchor ; Cytoplasmic side . Colocalizes with OPTN at the Golgi complex and in vesicular structures close to the plasma membrane. In the GDP- bound form, present in the perinuclear region. Shows a polarized distribution to distal regions of cell protrusions in the GTP- bound form. Colocalizes with PARD3, PRKCI, EXOC5, OCLN, PODXL and RAB11A in apical membrane initiation sites (AMIS) during the generation of apical surface and lumenogenesis. Localizes to tubular recycling endosome. Recruited to phagosomes containing S.aureus or M.tuberculosis.