[No authors listed]
BACKGROUND INFORMATION:Rab GTPases are key coordinators of eukaryotic intracellular membrane trafficking. In their active states, Rabs localise to the cytoplasmic face of intracellular compartments where they regulate membrane trafficking processes. Many Rabs have been extensively characterised whereas others, such as Rab30, have to date received relatively little attention. RESULTS:Here, we demonstrate that Rab30 is primarily associated with the secretory pathway, displaying predominant localisation to the Golgi apparatus. We find by time-lapse microscopy and fluorescence recovery after photobleaching studies that Rab30 is rapidly and continuously recruited to the Golgi. We also show that Rab30 function is required for the morphological integrity of the Golgi. Finally, we demonstrate that inactivation of Rab30 does not impair anterograde or retrograde transport through the Golgi. CONCLUSIONS:Taken together, these data illustrate that Rab30 primarily localises to the Golgi apparatus and is required for the structural integrity of this organelle.
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