Function
RAB39A plays a crucial role in the maturation and acidification of phagosomes that engulf pathogens, including *Staphylococcus aureus* and *Mycobacterium tuberculosis*. It is also involved in vesicular trafficking and the fusion of phagosomes with lysosomes. RAB39A negatively regulates lipopolysaccharide (LPS)-induced autophagosome formation in macrophages, potentially through the PI3K pathway. Additionally, RAB39A may participate in multiple neurite formation processes.