Respiratory complex I
ENZYME OF THE RESPIRATORY CHAIN CONSISTING OF SEVERAL POLYPEPTIDE CHAINS AND L-SHAPED, WITH A HORIZONTAL ARM LYING IN THE MEMBRANE AND A VERTICAL ARM THAT PROJECTS INTO THE MATRIX.
Complex I; Nadh dehydrogenase; Complex 1; Mitochondrial complex I; EC 1.6.5.3; NADH:ubiquinone reductase (H+-translocating); NADH dehydrogenase (ubiquinone); NADH:ubiquinone reductase; NADH:ubiquinone oxidoreductase (H+-translocating)
Respiratory complex I, (also known as NADH:ubiquinone oxidoreductase, Type I NADH dehydrogenase and mitochondrial complex I) is the first large protein complex of the respiratory chains of many organisms from bacteria to humans. It catalyzes the transfer of electrons from NADH to coenzyme Q10 (CoQ10) and translocates protons across the inner mitochondrial membrane in eukaryotes or the plasma membrane of bacteria.