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
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Cooccurrence
Coexpression
Experiments
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[Homology]
Score
fecATonB-dependent outer membrane ferric citrate transporter and signal transducer; FecA is the outer membrane receptor protein in the Fe(3+) dicitrate transport system. (774 aa)    
Predicted Functional Partners:
fecR
Anti-sigma transmembrane signal transducer for ferric citrate transport; Regulation of iron dicitrate transport. In the absence of citrate FecR inactivates fecI. FecR is probably a sensor that recognizes iron dicitrate in the periplasm.
 
 
 0.998
fecB
Ferric citrate ABC transporter periplasmic binding protein; Binds citrate-dependent Fe(3+); part of the binding-protein- dependent transport system for uptake of citrate-dependent Fe(3+).
 
  
 0.997
tonB
Membrane spanning protein in TonB-ExbB-ExbD transport complex; Interacts with outer membrane receptor proteins that carry out high-affinity binding and energy dependent uptake into the periplasmic space of specific substrates such as cobalamin, and various iron compounds (such as iron dicitrate, enterochelin, aerobactin, etc.). In the absence of TonB these receptors bind their substrates but do not carry out active transport. TonB also interacts with some colicins and is involved in the energy-dependent, irreversible steps of bacteriophages phi 80 and T1 infection. It could act to tran [...]
  
 0.996
fecD
Ferric citrate ABC transporter permease; Part of the binding-protein-dependent transport system for citrate-dependent Fe(3+). Probably responsible for the translocation of the substrate across the membrane.
 
  
 0.995
fecC
Ferric citrate ABC transporter permease; Part of the binding-protein-dependent transport system for citrate-dependent Fe(3+). Probably responsible for the translocation of the substrate across the membrane.
 
  
 0.994
fecI
RNA polymerase sigma-19 factor, fec operon-specific; Sigma factors are initiation factors that promote the attachment of RNA polymerase to specific initiation sites and are then released. This sigma factor regulates the fec genes for iron dicitrate transport (Probable); Belongs to the sigma-70 factor family. ECF subfamily.
 
  
 0.994
fecE
Fe(3+) dicitrate transport ATP-binding protein FecE; Part of the binding-protein-dependent transport system for citrate-dependent Fe(3+). Probably responsible for energy coupling to the transport system.
  
  
 0.987
exbB
Membrane spanning protein in TonB-ExbB-ExbD complex; Involved in the TonB-dependent energy-dependent transport of various receptor-bound substrates. Protects ExbD from proteolytic degradation and functionally stabilizes TonB.
  
 
 0.982
exbD
Membrane spanning protein in TonB-ExbB-ExbD complex; Involved in the TonB-dependent energy-dependent transport of various receptor-bound substrates.
  
 
 0.980
fepA
Ferrienterobactin outer membrane transporter; This protein is involved in the initial step of iron uptake by binding ferrienterobactin (Fe-ENT), an iron chelatin siderophore that allows E.coli to extract iron from the environment. FepA also acts as a receptor for colicins B and D.
  
  
 0.940
Your Current Organism:
Escherichia coli K12
NCBI taxonomy Id: 511145
Other names: E. coli str. K-12 substr. MG1655, Escherichia coli MG1655, Escherichia coli str. K-12 substr. MG1655, Escherichia coli str. K12 substr. MG1655, Escherichia coli str. MG1655, Escherichia coli strain MG1655
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