IUBMB Enzyme Nomenclature


Accepted name: NADH:ubiquinone reductase (non-electrogenic)

Reaction: NADH + H+ + ubiquinone = NAD+ + ubiquinol

Other name(s): ubiquinone reductase (ambiguous); coenzyme Q reductase (ambiguous); dihydronicotinamide adenine dinucleotide-coenzyme Q reductase (ambiguous); DPNH-coenzyme Q reductase (ambiguous); DPNH-ubiquinone reductase (ambiguous); NADH-coenzyme Q oxidoreductase (ambiguous); NADH-coenzyme Q reductase (ambiguous); NADH-CoQ oxidoreductase (ambiguous); NADH-CoQ reductase (ambiguous); NADH-ubiquinone reductase (ambiguous); NADH-ubiquinone oxidoreductase (ambiguous); reduced nicotinamide adenine dinucleotide-coenzyme Q reductase (ambiguous); NADH-Q6 oxidoreductase (ambiguous); NADH2 dehydrogenase (ubiquinone) (ambiguous)

Systematic name: NADH:ubiquinone oxidoreductase

Comments: A flavoprotein (FAD). Occurs in mitochondria of yeast and plants, and in aerobic bacteria. Has low activity with NADPH.

Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, PDB, CAS registry number:


1. Moller, I.M, and Palmer, J.M. Direct evidence for the presence of a rotenone-resistant NADH dehydrogenase on the inner surface of plant mitochondria. Physiologia Plantarum 54 (1982) 267-274.

2. de Vries, S. and Grivell, L.A. Purification and characterization of a rotenone-insensitive NADH:Q6 oxidoreductase from mitochondria of Saccharomyces cerevisiae. Eur. J. Biochem. 176 (1988) 377-384. [PMID: 3138118]

3. Kerscher, S.J., Okun, J.G. and Brandt, U. A single external enzyme confers alternative NADH:ubiquinone oxidoreductase activity in Yarrowia lipolytica. J. Cell Sci. 112 ( Pt 14) (1999) 2347-2354. [PMID: 10381390]

4. Rasmusson, A.G., Soole, K.L. and Elthon, T.E. Alternative NAD(P)H dehydrogenases of plant mitochondria. Annu. Rev. Plant Biol. 55 (2004) 23-39. [PMID: 15725055]

[EC created 2011]

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