Core Viewpoint - The research reveals the presence of an acidic nanolayer on the surface of lysosomes, which plays a crucial role in lysosomal function and positioning within cells, particularly in relation to Parkinson's disease [3][12][20]. Group 1: Research Findings - The study utilized innovative DNA nanodevices to directly observe an acidic nanolayer up to 21 nanometers thick on the lysosomal surface, indicating that lysosomes have an external acidic environment in addition to their internal acidic conditions [3][12]. - The acidic nanolayer has a pH that is 0.2-0.7 units lower than the neutral cytoplasm, corresponding to a hydrogen ion concentration that is 2-5 times higher [12]. - The formation and maintenance of this acidic nanolayer are primarily dependent on the TMEM175 protein, which is associated with Parkinson's disease [12][20]. Group 2: Mechanisms of Action - The acidic nanolayer directly regulates the positioning of lysosomes within the cell, dispersing them in nutrient-rich conditions and clustering them around the nucleus during starvation [15][17]. - The RILP protein acts as an acidic sensor that detects changes in the pH of the acidic nanolayer, recruiting motor proteins to move lysosomes towards the cell center [17]. - Disruption of the acidic nanolayer impairs lysosomal navigation, which is particularly significant in neurons, as TMEM175 dysfunction is linked to Parkinson's disease [17][20]. Group 3: Implications for Disease Treatment - The findings provide new insights into cellular regulation mechanisms and suggest potential therapeutic targets for lysosomal-related diseases, particularly by modulating the acidic nanolayer [20]. - The research opens avenues for developing therapies aimed at lysosomal function, especially in the context of Parkinson's disease, where the distribution of lysosomes is disrupted [20].