| Description | NADH:ubiquinone oxidoreductase (complex I) ( ) is a respiratory-chain enzyme that catalyses the transfer of two electrons from NADH to ubiquinone in a reaction that is associated with proton translocation across the membrane (NADH + ubiquinone = NAD+ + ubiquinol) [ ]. Complex I is a major source of reactive oxygen species (ROS) that are predominantly formed by electron transfer from FMNH(2). Complex I is found in bacteria, cyanobacteria (as a NADH-plastoquinone oxidoreductase), archaea [], mitochondria, and in the hydrogenosome, a mitochondria-derived organelle. In general, the bacterial complex consists of 14 different subunits, while the mitochondrial complex contains homologues to these subunits in addition to approximately 31 additional proteins [].This superfamily contains the subunit 3 of the NADH-ubiquinone oxidoreductase and the subunit A of the NADH-quinone oxidoreductase. | Name | NADH:ubiquinone oxidoreductase, subunit 3 superfamily |
| Short Name | NDAH_ubi_oxred_su3_sf | Type | Homologous_superfamily |
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