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Literature summary for 1.7.5.1 extracted from

  • Bonnefoy, V.; Demoss, J.A.
    Nitrate reductases in Escherichia coli (1994), Antonie van Leeuwenhoek, 66, 47-56.
    View publication on PubMed
Search for more literature for 1.7.5.1

Localization

Localization Comment Organism GeneOntology No. Textmining
membrane nitrate reductase A (encoded by narGHJI operon) and nitrate reductase Z (encoded by narZYWv operon) are membrane-bound Escherichia coli 16020
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Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
additional information Escherichia coli Escherichia coli expresses two different membrane-bound respiratory nitrate reductases, nitrate reductase A (NRA) and nitrate reductase Z (NRZ). The two enzymes are encoded by distinct operons located within two different loci on the Escherichia coli chromosome. The narGHJI operon, encoding nitrate reductase A, is located in the chlC locus at 27 min, along with several functionally related genes: narK, encoding a nitrate/nitrite antiporter, and the narXL operon, encoding a nitrate-activated, two component regulatory system. The narZYWV operon, encoding nitrate reductase Z, is located in the chlZ locus located at 32.5 min, a region which includes a narK homologue, narU, but no apparent homologue to the narXL operon. The two membrane-bound enzymes have similar structures and biochemical properties and are capable of reducing nitrate using normal physiological substrates. The homology of the amino acid sequences of the peptides encoded by the two operons is extremely high but the intergenic regions share no related sequences. The expression of both the narGHJI operon and the narK gene are positively regulated by two transacting factors Fnr and NarL-phosphate, activated respectively by anaerobiosis and nitrate, while the narZYWV operon and the narU gene are constitutively expressed. Nitrate reductase A, which accounts for 98% of the nitrate reductase activity when fully induced, is clearly the major respiratory nitrate reductase in Escherichia coli ?
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Organism

Organism UniProt Comment Textmining
Escherichia coli
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Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
additional information Escherichia coli expresses two different membrane-bound respiratory nitrate reductases, nitrate reductase A (NRA) and nitrate reductase Z (NRZ). The two enzymes are encoded by distinct operons located within two different loci on the Escherichia coli chromosome. The narGHJI operon, encoding nitrate reductase A, is located in the chlC locus at 27 min, along with several functionally related genes: narK, encoding a nitrate/nitrite antiporter, and the narXL operon, encoding a nitrate-activated, two component regulatory system. The narZYWV operon, encoding nitrate reductase Z, is located in the chlZ locus located at 32.5 min, a region which includes a narK homologue, narU, but no apparent homologue to the narXL operon. The two membrane-bound enzymes have similar structures and biochemical properties and are capable of reducing nitrate using normal physiological substrates. The homology of the amino acid sequences of the peptides encoded by the two operons is extremely high but the intergenic regions share no related sequences. The expression of both the narGHJI operon and the narK gene are positively regulated by two transacting factors Fnr and NarL-phosphate, activated respectively by anaerobiosis and nitrate, while the narZYWV operon and the narU gene are constitutively expressed. Nitrate reductase A, which accounts for 98% of the nitrate reductase activity when fully induced, is clearly the major respiratory nitrate reductase in Escherichia coli Escherichia coli ?
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Synonyms

Synonyms Comment Organism
nitrate reductase Z
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 Escherichia coli
NRA nitrate reductase A
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 Escherichia coli
NRZ
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 Escherichia coli