STRINGSTRING
STRING protein interaction network
Nodes:
Network nodes represent proteins
splice isoforms or post-translational modifications are collapsed, i.e. each node represents all the proteins produced by a single, protein-coding gene locus.
Node Color
colored nodes:
query proteins and first shell of interactors
white nodes:
second shell of interactors
Node Content
empty nodes:
proteins of unknown 3D structure
filled nodes:
a 3D structure is known or predicted
Edges:
Edges represent protein-protein associations
associations are meant to be specific and meaningful, i.e. proteins jointly contribute to a shared function; this does not necessarily mean they are physically binding to each other.
Known Interactions
from curated databases
experimentally determined
Predicted Interactions
gene neighborhood
gene fusions
gene co-occurrence
Others
textmining
co-expression
protein homology
Your Input:
Neighborhood
Gene Fusion
Cooccurrence
Coexpression
Experiments
Databases
Textmining
[Homology]
Score
nasBAssimilatory nitrate reductase (electron transfer subunit NasB); Required for nitrate assimilation. (771 aa)    
Predicted Functional Partners:
nasE
Assimilatory nitrite reductase subunit; Required for nitrite assimilation. Required for activity of the reductase (By similarity).
 
 0.999
nasC
Assimilatory nitrate reductase (catalytic subunit); Nitrate reductase is a key enzyme involved in the first step of nitrate assimilation in plants, fungi and bacteria.
 
 0.999
nasA
Putative nitrate transporter; May function as a nitrate transporter.
 
 
 0.994
narG
Nitrate reductase (alpha subunit); The alpha chain is the actual site of nitrate reduction.
  
 
 0.989
narH
Nitrate reductase (beta subunit); The beta chain is an electron transfer unit containing four cysteine clusters involved in the formation of iron-sulfur centers. Electrons are transferred from the gamma chain to the molybdenum cofactor of the alpha subunit.
  
 
 0.983
narI
Nitrate reductase (gamma subunit); The gamma chain is a membrane-embedded heme-iron unit resembling cytochrome b, which transfers electrons from quinones to the beta subunit.
  
 
 0.982
narK
Nitrite extrusion permease; Involved in excretion of nitrite produced by the dissimilatory reduction of nitrate; Belongs to the major facilitator superfamily. Nitrate/nitrite porter (TC 2.A.1.8) family.
 
 
 0.967
glnA
Glutamine synthetase; Glutamine synthetase (GS) is an unusual multitasking protein that functions as an enzyme, a transcription coregulator, and a chaperone in ammonium assimilation and in the regulation of genes involved in nitrogen metabolism. It catalyzes the ATP-dependent biosynthesis of glutamine from glutamate and ammonia. Feedback-inhibited GlnA interacts with and regulates the activity of the transcriptional regulator TnrA. During nitrogen limitation, TnrA is in its DNA- binding active state and turns on the transcription of genes required for nitrogen assimilation. Under condi [...]
  
 
 0.958
nasD
Assimilatory nitrite reductase subunit; Required for nitrite assimilation.
 
 
0.953
gudB
Cryptic glutamate dehydrogenase; GudB seems to be intrinsically inactive, however spontaneous mutations removing a 9-bp direct repeat within the wild-type gudB sequence activated the GudB protein and allowed more-efficient utilization of amino acids of the glutamate family. This insertion presumably causes severe destabilization of the fold of the protein, leading to an inactive enzyme that is very quickly degraded. The cryptic GudB serves as a buffer that may compensate for mutations in the rocG gene and that can also be decryptified for the utilization of glutamate as a single carbon [...]
   
 
 0.909
Your Current Organism:
Bacillus subtilis 168
NCBI taxonomy Id: 224308
Other names: B. subtilis subsp. subtilis str. 168, Bacillus subtilis subsp. subtilis 168, Bacillus subtilis subsp. subtilis str. 168, Bacillus subtilis subsp. subtilis str. BGSC 1A700
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