Complex I assembly factor TIMMDC1, mitochondrial (TIMMDC1)

TIMMDC1 (Complex I assembly factor TIMMDC1, mitochondrial) is a multi-pass transmembrane protein of the inner mitochondrial membrane and an essential chaperone for assembly and stabilization of respiratory chain complex I (NADH:ubiquinone oxidoreductase)[1][2][4]. It is structurally related to the TIM17-TIM22-TIM23 family, containing four predicted transmembrane domains and localizing both its N- and C-termini to the mitochondrial matrix[1][4]. TIMMDC1 enables stepwise assembly of both the membrane and soluble arms of complex I by interacting with the MCIA assembly complex, core subunits, and additional complex I assembly factors[1][2]. Loss of TIMMDC1 impairs complex I assembly, disrupts mitochondrial respiration, and is associated with neurodegenerative disease, severe neurologic dysfunction, and inherited complex I deficiency syndromes[1][3][4]. Overexpression of TIMMDC1 has been linked to increased metastatic behavior in lung carcinoma cells, while depletion impairs cell growth, migration, and regulation of apoptosis[4]. There are currently no approved drugs directly targeting TIMMDC1.

Other names

C3orf1Protein M5-14Translocase of inner mitochondrial membrane domain-containing protein 1Complex I assembly factor TIMMDC1, mitochondrialTIMM domain containing-protein 1FLJ22597M5-14 proteinTransmembrane protein C3orf1