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
tnrANitrogen sensing transcriptional regulator; Transcription regulator that actives the transcription of genes required for nitrogen assimilation such as nrgAB (ammonium transport), nasABCDEF (nitrate/nitrite assimilation), ureABC (urea degradation) and gabP (GABA transport), during nitrogen limitation. Also represses glnRA and gltAB in the absence of ammonium. On the contrary of the MerR members, which require longer DNA sites for high-affinity binding, TnrA requires a DNA sequence of 17 nucleotides as minimal binding site. (110 aa)    
Predicted Functional Partners:
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 [...]
 
 
 0.994
amtB
Ammonium transporter; Functions as an ammonium and methylammonium transporter in the absence of glutamine. Required for ammonium utilization at low concentrations or at low pH values, when ammonium is the single nitrogen source. Required for binding of NrgB to the membrane. Interaction between GlnK-AmtB complex and TnrA protects TnrA from proteolytic degradation.
  
  
 0.950
codY
Transcriptional regulator, GTP and BCAA-dependent; DNA-binding protein that represses the expression of many genes that are induced as cells make the transition from rapid exponential growth to stationary phase and sporulation. It is a GTP- binding protein that senses the intracellular GTP concentration as an indicator of nutritional limitations. At low GTP concentration it no longer binds GTP and stop to act as a transcriptional repressor.
      
 0.914
glnJ
Two-component sensor histidine kinase [GlnL] for glutamine degradation; Member of the two-component regulatory system GlnK/GlnL that positively regulates the expression of the glsA-glnT operon in response to glutamine. It seems that autophosphorylated GlnK transfers a phosphoryl group to GlnL, which positively regulates the expression of the glsA-glnT operon. Interaction between GlnK-AmtB complex and TnrA protects TnrA from proteolytic degradation.
    
   0.849
ccpA
Transcriptional regulator (Lacl family); Global transcriptional regulator of carbon catabolite repression (CCR) and carbon catabolite activation (CCA), which ensures optimal energy usage under diverse conditions. Interacts with either P- Ser-HPr or P-Ser-Crh, leading to the formation of a complex that binds to DNA at the catabolite-response elements (cre). Binding to DNA allows activation or repression of many different genes and operons.
      
 0.846
gltC
Transcriptional regulator (LysR family); Positive regulator of glutamate biosynthesis (gltAB genes). Negatively regulates its own expression.
      
 0.830
ykoL
Hypothetical protein; Evidence 5: No homology to any previously reported sequences; PubMedId: 10671441.
     
 0.792
ykzB
Hypothetical protein; Evidence 5: No homology to any previously reported sequences; PubMedId: 10671441.
  
  
 0.790
pucR
Transcriptional regulator of the purine degradation operon; Activates the expression of pucFG, pucH, pucI, pucJKLM and guaD, while it represses pucABCDE and its own expression. Belongs to the CdaR family.
  
  
 0.781
ansZ
L-asparaginase 2 (putative lipoprotein); Catalyzes the conversion of L-asparagine to L-aspartate and ammonium.
   
  
 0.709
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
Server load: low (20%) [HD]