Transmembrane channel-like protein 1 (TMC1) (TMC1)

Transmembrane channel-like protein 1 (TMC1) is a multi-pass membrane protein that serves as a core component of the mechanotransduction (MET) channel complex in the inner ear's sensory hair cells (UniProt Q8TDI8). It is essential for converting mechanical stimuli from sound waves into electrical signals, a process fundamental to the sense of hearing and balance (PubMed: 26154390). Mutations in the TMC1 gene are a significant cause of hereditary deafness, underlying both autosomal dominant (DFNA36) and autosomal recessive (DFNB7/11) forms of non-syndromic hearing loss (PubMed: 11992261). Because TMC1 is required for the final step of sensory transduction, its absence leads to profound hearing loss due to the inability of hair cells to signal to the auditory nerve. AAV-mediated gene replacement therapy aims to deliver a functional copy of the TMC1 gene to these hair cells using adeno-associated virus vectors to restore MET channel function and hearing (PubMed: 30674903). This therapeutic approach is currently a major focus of genetic medicine for treating congenital deafness.

Other names

Transmembrane cochlear-expressed protein 1DFNA36DFNB7DFNB11TMC1

Gene replacement therapy to restore functional TMC1 protein expression in inner ear hair cells, thereby re-establishing mechanotransduction and auditory signaling.