Nitrate reductase

Nitrate reduction are oxidoreductases, which catalyze the reduction of nitrate to nitrite. Nitrate reductases play an important role in nitrogen assimilation ( assimilatory nitrate reduction ) in plants and the nitrate respiration ( dissimilatory nitrate reduction ) in bacteria ( denitrification). Often chlorate can be reduced to chlorite.

The six currently known nitrate reductases can be classified according to their electron donor and mechanism in the following classes:

  • The present in plants, bacteria, and some other eukaryotes and archaea nitrate reductase (NADH ) (EC 1.7.1.1 ):
  • The occurring in plants, bacteria, and some Saccharomycetes nitrate (NAD (P) H ) (EC 1.7.1.2 ) can use both NADPH and NADH:
  • Which occurs in many fungi nitrate reductase (NADPH ) (EC 1.7.1.3 ):
  • The occurring in some bacterial nitrate reductase ( quinone ) (EC 1.7.5.1 ):
  • Which occurs in many bacteria, nitrate reductase ( ferredoxin ) (EC 1.7.7.2 ):
  • The occurring in some bacterial nitrate reductase ( cytochrome ) (EC 1.9.6.1 ):
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