LRRC26 (leucine rich repeat containing 26) functions as an auxiliary γ subunit of large-conductance calcium- and voltage-activated potassium (BK) channels, playing critical roles in cellular physiology and disease pathophysiology 1. The protein dramatically enhances BK channel voltage sensitivity by producing a large negative shift (~140 mV) in voltage dependence of activation, converting BK channels from high-voltage to low-voltage activated states under physiological conditions 12. LRRC26 is expressed in diverse tissues including arterial smooth muscle, airway epithelium, and intestinal goblet cells, where it regulates specific physiological functions 345. In arterial smooth muscle cells, LRRC26 associates with plasma membrane BK channels to regulate vascular tone and vasodilation 3. In airway epithelium, LRRC26-regulated BK channels are essential for airway surface liquid homeostasis and mucociliary clearance, with dysfunction contributing to cystic fibrosis pathophysiology 46. In intestinal goblet cells, LRRC26-associated BK channels protect against colitis and regulate mucin secretion 5. Therapeutic targeting of LRRC26 function shows promise, as compounds like nesolicaftor can restore LRRC26-mediated BK channel function in disease states 7. Additionally, LRRC26 may function as a tumor suppressor in colorectal cancer 8.