NasE

• Description: assimilatory nitrite reductase (subunit)
  
  

Gene name	nasE
Synonyms	nasBD, nirD
Essential	no
Product	assimilatory nitrite reductase (subunit)
Function	utilization of nitrite as nitrogen source
MW, pI	11 kDa, 4.805
Gene length, protein length	318 bp, 106 aa
Immediate neighbours	nasF, nasD
Get the DNA and protein sequences (Barbe et al., 2009)
Genetic context This image was kindly provided by SubtiList

The gene

Basic information

• Locus tag: BSU03290

Database entries

• DBTBS entry: [1]

• SubtiList entry: [2]

The protein

Basic information/ Evolution

• Catalyzed reaction/ biological activity: Ammonium hydroxide + 3 NAD(P)⁺ + H₂O = nitrite + 3 NAD(P)H (according to Swiss-Prot)

• Protein family:

• Paralogous protein(s):

Extended information on the protein

• Kinetic information:

• Domains:

• Modification:

• Cofactor(s):

• Effectors of protein activity:

• Interactions: NasD-NasE

• Localization: cytoplasm (according to Swiss-Prot)

Database entries

• Structure:

• UniProt: P42436

• KEGG entry: [3]

• E.C. number: 1.7.1.4

Expression and regulation

• Operon: nasB-nasC-nasD-nasE-nasF PubMed

• Sigma factor: SigA PubMed

• Regulation:
  • expressed in the absence of good nitrogen sources (glutamine or ammonium) (TnrA) PubMed
  • expressed under anaerobic conditions (ResD) PubMed
  • induced by nitric oxide under anaerobic conditions (NsrR) PubMed
  • induced by iron starvation (Fur) PubMed

• Regulatory mechanism:
  • TnrA: transcription activation PubMed
  • ResD: transcription activation PubMed
  • NsrR: transcription repression PubMed

• Additional information:

Biological materials

• Mutant:

• Expression vector:

• lacZ fusion:

• GFP fusion:

• two-hybrid system:

• Antibody: