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Gene Review

nirS  -  nitrite reductase

Pseudomonas aeruginosa PAO1

 
 
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Disease relevance of nirS

  • A gene, designated dnr, was identified in the vicinity of the structural genes for nitrite reductase (nirS) and nitric oxide reductase (norCB), and the gene for activation of the reductases (nirQ) from Pseudomonas aeruginosa [1].
 

High impact information on nirS

  • From nirS through nirN, the stop codon of one gene and the start codon of the next gene were closely linked, suggesting that nirSMCFDLGHJEN are expressed from a promoter which regulates the transcription of nirSM [2].
  • Three c-type cytochromes, NirM, NirC, and NirN, are encoded in the nirSMCFDLGHJEN gene cluster for cytochrome cd(1)-type nitrite reductase (NIR) of Pseudomonas aeruginosa. nirS is the structural gene for NIR [3].
  • The activity of the promoters involved in transcription of the genes (nirS, nirQ and norC) required for anaerobic reduction of nitrite and nitric oxide was investigated in NIR- and NOR-deficient mutants of Pseudomonas aeruginosa [4].
  • The transcriptional activity of these three promoters was induced by nitrite in a wild-type strain and the activity was low in an nirS mutant [4].
  • In the denitrification gene cluster from Pseudomonas aeruginosa, an operon encoding three open reading frames (nirQ, ORF2, ORF3) was upstream of the structural gene for nitrite reductase (nirS) as a divergent transcriptional organization [5].

References

 
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