Ferredoxin—NAD(+) reductase

In enzymology, a ferredoxin–NAD⁺ reductase (EC 1.18.1.3) is an enzyme that catalyzes the chemical reaction:

reduced ferredoxin + NAD⁺ ${\displaystyle \rightleftharpoons }$ oxidized ferredoxin + NADH + H⁺

Thus, the two substrates of this enzyme are reduced ferredoxin and NAD⁺, whereas its 3 products are oxidized ferredoxin, NADH, and H⁺. This enzyme participates in fatty acid metabolism.

This enzyme belongs to the family of oxidoreductases, specifically those acting on iron-sulfur proteins as donor with NAD+ or NADP+ as acceptor.

The systematic name of this enzyme is ferredoxin:NAD⁺ oxidoreductase. There are a variety of names in common use:

• ferredoxin–nicotinamide adenine dinucleotide reductase
• ferredoxin reductase
• NAD⁺-ferredoxin reductase
• ferredoxin–NAD⁺ reductase
• ferredoxin–linked NAD⁺ reductase
• ferredoxin–NAD reductase

When NAD molecule is in its reduced form, the enzyme is referred to as:

• NADH-ferredoxin oxidoreductase
• reduced nicotinamide adenine dinucleotide-ferredoxin
• NADH-ferredoxin reductase
• NADH flavodoxin oxidoreductase
• NADH₂-ferredoxin oxidoreductase

Other enzymes in the family include:

• NADH-ferredoxin NAP reductase (component of naphthalene dioxygenase multicomponent enzyme system)
• NADH-ferredoxin TOL reductase (component of toluene dioxygenase)