Protein
Assimilatory nitrate reductase
Organism
Haloferax mediterranei (strain ATCC 33500 / DSM 1411 / JCM 8866 / NBRC 14739 / NCIMB 2177 / R-4)
Function
Nitrate reductase is a key enzyme involved in the first step of nitrate assimilation. Catalyzes the reduction of nitrate to nitrite, using ferredoxin as the electron donor. Can use reduced methyl viologen but neither NADPH nor NADH as electron donors.
Similarity
Belongs to the prokaryotic molybdopterin-containing oxidoreductase family. NasA/NapA/NarB subfamily.
Sequence
MPRNLRFLSVVNHVTKQVPTTCMRCAVGCGHVHLGSENAYGLETVRGDPSHPVNNGLACGRGIRESADPAGEWLTRPLVREDGELVQTSWSDAMARVGATIRTAVATDPDEVAVLGSGQQTNEAAYALGKLARAGIGTRNYDANTTLCMASAVTAYYRAFGSDAPPPTYDDIPNAETHLVWGANPAVAHPVMFRWIRQSATDGRLVVVDPVETKTAAVADDHVSVAPGGDLALARAILRHLVDTDQIDESFVRSNTEGFDDVVSALPSVTDAAARAGVSLDTVEELAALLDAPTLIYWGMGVNQSVRGTATAGALVNLCLASGNLGPGTGPFSLTGQANSMGTRVCSSKGTWSGHRPFEHPDHRRAVAEAWDVPVSRLPDDSGPGPVGILDSSPSVVWTVATNPLAGFPDATAAREVLRDSFLVVQDAFRSDTVELADVVLPAATWGESEGTAMNMERTVSRIRAATETPPGVRQDLDIIADVAARVAPGLLPRPPVSPSAIFDEFAALTEGTDADCSGISYTRLDGERAVRWPAPEPNSDAGYRYYDPSTSRWTFPTPSGKARFSTLDGEPLPEPVDGDYPLTLTTGREADGYNTGVRSRSDTPEEPVARVNPETVDTYHDAVADTDGELRTTVVSRRASVSVTLDRDDAVPPGLVWLSIHHPMTNQLTSPAVDPQSNEPNFKQCAVRFVHPDAPAKADFLAAEVSD