Probable ion channel required for the normal function of cochlear hair cells (PubMed:11850618). Component of the hair cell's mechanotransduction (MET) machinery. Involved in mechanosensitive responses of the hair cells (By similarity). Interacts with TOMT. The interaction of TMC1 and TMC2 with TOMT is required for the transportation of TMC1/2 into the stereocilia of hair cells. Interacts (via N-terminus) with both isoforms CD1 and CD3 of PCDH15. Localized to the stereocilia of the cochlear hair cells. Detected in fetal cochlea. Belongs to the TMC family. Truncated N-terminus. Truncated N-terminus.