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
rpoNRNA polymerase sigma-54 factor; Sigma factors are initiation factors that promote the attachment of RNA polymerase to specific initiation sites and are then released. This sigma factor is responsible for the expression of the nitrogen fixation genes (nif operon), glnA and dctA for dicarboxylate transport. The open complex (sigma-54 and core RNA polymerase) serves as the receptor for receipt of the melting signal from the remotely bound activator proteins NifA, NtrC, or DctD for the expression of the regulated proteins. (519 aa)    
Predicted Functional Partners:
rpoA
DNA-directed RNA polymerase alpha chain; DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates.
 
 
 0.911
rpoC
DNA-directed RNA polymerase beta subunit; DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates.
  
 
 
 0.890
rpoB
DNA-directed RNA polymerase, beta subunit; DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates.
    
 
 0.875
ntrC
Response regulator for gln; Member of the two-component regulatory system NtrB/NtrC, which controls expression of the nitrogen-regulated (ntr) genes in response to nitrogen limitation. Phosphorylated NtrC binds directly to DNA and stimulates the formation of open promoter-sigma54-RNA polymerase complexes.
 
  
 0.836
ACP26587.1
Sigma-54 dependent DNA-binding response regulator.
 
  
 0.794
ntrX
Nitrogen assimilation regulatory protein, NtrX.
 
  
 0.783
ACP23819.1
Predicted phosphotransferase system, phosphoenolpyruvate-dependent sugar EIIA 2.
 
  
 0.749
hpf
Ribosomal protein S30Ae/sigma 54 modulation protein; Required for dimerization of active 70S ribosomes into 100S ribosomes in stationary phase; 100S ribosomes are translationally inactive and sometimes present during exponential growth.
  
  
 0.673
hfq
Protein Hfq; RNA chaperone that binds small regulatory RNA (sRNAs) and mRNAs to facilitate mRNA translational regulation in response to envelope stress, environmental stress and changes in metabolite concentrations. Also binds with high specificity to tRNAs. Belongs to the Hfq family.
 
  
 0.628
ACP24619.1
Signal peptidase I; Belongs to the peptidase S26 family.
  
  
 0.608
Your Current Organism:
Sinorhizobium fredii NGR234
NCBI taxonomy Id: 394
Other names: Ensifer fredii NGR234, Plasmid pNGR234a, Rhizobium sp. (strain NGR234), Rhizobium sp. NGR234, S. fredii NGR234, Sinorhizobium sp. NGR234
Server load: low (38%) [HD]
STRING is a Core Data Resource as designated by Global Biodata Coalition and ELIXIR.