形式 |
Rab1 (Ypt1 in yeast) is a small GTPase that plays a well-established role in mediating ER-to-Golgi protein transport in both yeast and mammalian cells. Rab1 recruits effector proteins to budding COPII vesicles at the ER, forming cis-SNARE complexes that promote targeting to and fusion of these vesicles with the cis-Golgi. Rab1 is also involved in COPI vesicle formation and other distinct transport pathways, including ER-to-Golgi intermediate compartment (ERGIC)-to-cell periphery trafficking. Recently Rab1 has been shown to function in antimicrobial autophagy (autophagosome formation), as well as other forms of autophagy in mammalian cells in a way independent of ER-to-Golgi trafficking.
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產(chǎn)品描述 |
Function
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 directly responsible for vesicle formation, movement, tethering and fusion. RAB1A regulates vesicular protein transport from the endoplasmic reticulum (ER) to the Golgi compartment and on to the cell surface, and plays a role in IL-8 and growth hormone secretion. Regulates the level of CASR present at the cell membrane. Plays a role in cell adhesion and cell migration, via its role in protein trafficking. Plays a role in autophagosome assembly and cellular defense reactions against pathogenic bacteria. Plays a role in microtubule-dependent protein transport by early endosomes and in anterograde melanosome transport.
Cellular_Location
Golgi apparatus. Endoplasmic reticulum. Early endosome. Cytoplasm, cytosol. Membrane. Melanosome. Note=Alternates between membrane-associated and cytosolic forms
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