NasB

• Description: nitrate reductase (electron transfer subunit)
  
  

Gene name	nasB
Synonyms	nasBA
Essential	no
Product	nitrate reductase (electron transfer subunit)
Function	utilization of nitrate
Gene expression levels in SubtiExpress: nasB
Interactions involving this protein in SubtInteract: NasB
Metabolic function and regulation of this protein in SubtiPathways: Alternative nitrogen sources
MW, pI	84 kDa, 5.483
Gene length, protein length	2310 bp, 770 aa
Immediate neighbours	nasC, nasA
Sequences	Protein DNA Advanced_DNA
Genetic context This image was kindly provided by SubtiList
Expression at a glance   PubMed

Categories containing this gene/protein

utilization of nitrogen sources other than amino acids

This gene is a member of the following regulons

TnrA regulon

The gene

Basic information

• Locus tag: BSU03320

Database entries

• DBTBS entry: [1]

• SubtiList entry: [2]

The protein

Basic information/ Evolution

• Catalyzed reaction/ biological activity:

• Protein family:

• Paralogous protein(s): NasD

Extended information on the protein

• Kinetic information:

• Domains:

• Modification:

• Cofactor(s):

• Effectors of protein activity:

• Interactions: NasB-NasC

• Localization:

Database entries

• Structure:

• UniProt: P42433

• KEGG entry: [3]

• E.C. number:

Expression and regulation

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

• Expression browser: nasB PubMed

• Sigma factor: SigA PubMed

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

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

• Additional information:

Biological materials

• Mutant:
  • 1A971 ( nasB::erm), PubMed, available at BGSC

• Expression vector:

• lacZ fusion:

• GFP fusion:

• two-hybrid system:

• Antibody:

References

Reviews

Víctor M Luque-Almagro, Andrew J Gates, Conrado Moreno-Vivián, Stuart J Ferguson, David J Richardson, M Dolores Roldán
Bacterial nitrate assimilation: gene distribution and regulation.
Biochem Soc Trans: 2011, 39(6);1838-43
[PubMed:22103536] [WorldCat.org] [DOI] (I p)