Transmembrane channel-like protein 2 (TMC2)

Transmembrane channel-like protein 2 (TMC2) is an evolutionarily conserved membrane protein that functions as a probable pore-forming subunit of a mechanosensitive ion channel complex[2][3]. In vertebrates, TMC2 (alongside TMC1) is crucial for mechanotransduction in auditory hair cells, facilitating the conversion of sound-induced mechanical force into electrical signals required for hearing[3]. Structurally, TMC2 is a dimeric membrane protein with 10 transmembrane helices, and it complexes with auxiliary proteins such as TMIE and CALM-1[1][2]. It is widely expressed in sensory systems and is essential for normal auditory function, with mutations linked to hereditary hearing loss (though more direct links are established for TMC1). The gating and ion selectivity mechanisms, as well as downstream signaling, are the subject of extensive research, but the protein is considered a member of a novel ion channel family involved in fundamental sensory processes[2][3]. No clinically approved drugs are known to act on TMC2, and there are no established biomarkers or clinical safety concerns recognized to date[3].

Other names

Transmembrane channel-like 2TMC2C20orf145UNQ907/PRO1928dJ686C3.3Transmembrane cochlear-expressed protein 2transmembrane cochlear-expressed gene 2

Not established; no approved drugs directly target TMC2