1.7.7.2: ferredoxin-nitrate reductase
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For detailed information about ferredoxin-nitrate reductase, go to the full flat file.
Word Map on EC 1.7.7.2
Reaction
Synonyms
assimilatory ferredoxin-nitrate reductase, Assimilatory nitrate reductase, C452_13229, dissimilatory nitrate reductase, EC 1.7.99.4, Fd-dependent nitrate reductase, Fd-NAS, NaR, narB, NarGH, NAS, NasB, nitrate (ferredoxin) reductase, nitrate reductase, reductase, nitrate (ferredoxin), respiratory nitrate reductase
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General Information on EC 1.7.7.2 - ferredoxin-nitrate reductase
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GENERAL INFORMATION 
ORGANISM
UNIPROT
COMMENTARY 
LITERATURE
malfunction
the narB knockout of Synechococcus sp. 7002 is sufficient to redirect the dominant flux of electrons from nitrate reduction to other fermentative metabolites, including a 6fold higher H2 yield than in the wild-type strain. The DELTAnarB mutant is able to take up intracellular nitrate but is unable to reduce it to nitrite or ammonia, and is unable to grow photoautotrophically on nitrate. During photoautotrophic growth on urea, mutant DELTAnarB significantly redirects biomass accumulation into glycogen at the expense of protein accumulation. Because there is no metabolism of nitrate in the DELTAnarB strain, nitrate cannot act as a strong terminal electron acceptor to lower the cellular redox poise, which is known to inhibit glucose-6-phosphate dehydrogenase (G6PDH) activity. Phenotype, overview
metabolism
physiological function
once nitrate is transported into the cell by nitrate permease (NrtP), two reduced ferredoxin molecules reduce one nitrate to one nitrite, catalyzed by nitrate reductase (encoded by gene narB)
