TMC2 is a pore-forming subunit of the mechanotransducer (MET) ion channel complex located at the tips of stereocilia in cochlear and vestibular hair cells. As part of the auditory mechanotransduction machinery, TMC2 mediates the conversion of sound-induced mechanical vibrations into electrical signals through a mechanism involving tip-link tension 1. Recent evidence demonstrates that TMC1 and TMC2 are mechanically gated ion channels capable of responding directly to mechanical stimuli, with human TMC2 showing robust responses to mechanical poking in heterologous cells 2. The channel exhibits high calcium permeability and transports monovalent cations 3. TMC2 functions as part of a larger complex that includes auxiliary proteins such as TMIE, CIB2, LHFPL5, and PCDH15; TMIE particularly modulates TMC2 channel gating through palmitoylation 4. Biallelic mutations in TMC2 cause hearing loss and deafness in humans and mice, with deafness-related mutations altering the channel's ion selectivity properties. At the population level, TMC2 is LoF-tolerant; this contrasts with clinical pathogenicity observed in individuals carrying disease-associated variants. The mechanistic insights into TMC2 function have implications for developing hearing restoration therapies targeting mechanotransduction channels.