ARL8A is a small GTPase that localizes to lysosomes through N-terminal acetylation and functions as a positive regulator of lysosomal motility 1. Overexpression of ARL8A promotes microtubule-dependent redistribution of lysosomes toward the cell periphery, increasing bidirectional lysosomal transport frequency 1. In neurons, ARL8A mediates anterograde axonal transport of presynaptic lysosome-related vesicles essential for presynaptic biogenesis and synaptic function. ARL8A recruits kinesin-3 molecular motors to lysosomes through interaction with adaptor proteins, a process that is functionally independent yet analogous to bacterial effector-mediated pathways 2. Additionally, ARL8A associates with tubulin and localizes to the spindle midzone, playing a role in chromosome 1 during mitosis 3. Disease relevance includes potential association with bipolar disorder, where ARL8A variants may serve as diagnostic biomarkers 45. ARL8A is also implicated in colorectal cancer metastasis, identified as a potential clinical biomarker in regulatory cascade analyses 6. These multifaceted functions underscore ARL8A's importance in intracellular trafficking, cytoskeletal dynamics, and genomic stability.