Probable ion channel required for the normal function of cochlear hair cells. 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, and at low levels in placenta and testis. The disease is caused by variants affecting the gene represented in this entry. The disease is caused by variants affecting the gene represented in this entry. Belongs to the TMC family. Truncated C-terminus.