STOML3 is a stomatin-domain protein that functions as a critical modulator of mechanosensitive ion channels, particularly PIEZO1 and PIEZO2, which are essential for detecting mechanical stimuli in sensory systems 1. Located at the plasma membrane, STOML3 potentiates PIEZO channel function by dramatically increasing their sensitivity to mechanical displacements, reducing activation thresholds by approximately one order of magnitude to ~10 nm—the molecular-scale movements relevant for fine touch sensation 1. This modulation occurs through the stomatin domain and requires higher-order protein scaffolds 1. Beyond PIEZO channels, STOML3 acts as a robust physiological regulator of mechanosensitive currents in sensory neurons, functioning as an integral membrane scaffold protein within transmembrane complexes anchored to extracellular matrix components 2. The family of stomatin-domain proteins, including STOML3, share common characteristics: they form oligomers, localize to membrane domains, and modulate ion channel activity, though precise mechanistic details remain incompletely understood 3. Clinically, STOML3 is implicated in cancer biology, with its amplification associated with mesenchymal differentiation in gliosarcoma 4, and it interacts with PIEZO2 in gastric cancer pathophysiology 5. These findings establish STOML3 as an essential tuning protein for mechanotransduction in touch sensation and multiple pathophysiological contexts.