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
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Textmining
[Homology]
Score
ubiD3-octaprenyl-4-hydroxybenzoate decarboxylase; Catalyzes the decarboxylation of 3-octaprenyl-4-hydroxy benzoate to 2-octaprenylphenol, an intermediate step in ubiquinone biosynthesis; Belongs to the UbiD family. (497 aa)    
Predicted Functional Partners:
ubiX
3-octaprenyl-4-hydroxybenzoate carboxy-lyase; Flavin prenyltransferase that catalyzes the synthesis of the prenylated FMN cofactor (prenyl-FMN) for 4-hydroxy-3-polyprenylbenzoic acid decarboxylase UbiD. The prenyltransferase is metal-independent and links a dimethylallyl moiety from dimethylallyl monophosphate (DMAP) to the flavin N5 and C6 atoms of FMN (By similarity). Acts in concert with UbiD to perform the decarboxylation of 4-hydroxy-3-octaprenyl-benzoate, a step in the biosynthesis of coenzyme Q ; Belongs to the UbiX/PAD1 family.
 
 0.997
ubiA
P-hydroxybenzoate octaprenyltransferase; Catalyzes the prenylation of para-hydroxybenzoate (PHB) with an all-trans polyprenyl group. Mediates the second step in the final reaction sequence of ubiquinone-8 (UQ-8) biosynthesis, which is the condensation of the polyisoprenoid side chain with PHB, generating the first membrane-bound Q intermediate 3-octaprenyl-4-hydroxybenzoate. Geranyldiphosphate (GPP), all-trans- farnesyldiphosphate (FPP) and all-trans-solanesyldiphosphate (SPP) are also accepted as side chain precursors. Belongs to the UbiA prenyltransferase family.
 
 
 0.994
ubiI
2-octaprenylphenol hydroxylase, FAD-dependent; FAD-dependent monooxygenase required for the aerobic hydroxylation of 2-octaprenylphenol to 2-octaprenyl-6-hydroxy-phenol, the first hydroxylation step in coenzyme Q (ubiquinone) biosynthesis.
  
 
 0.964
ubiE
Ubiquinone/menaquinone biosynthesis C-methyltransferase UbiE; Methyltransferase required for the conversion of demethylmenaquinol (DMKH2) to menaquinol (MKH2) and the conversion of 2-polyprenyl-6-methoxy-1,4-benzoquinol (DDMQH2) to 2-polyprenyl-3- methyl-6-methoxy-1,4-benzoquinol (DMQH2).
 
  
 0.949
fre
NAD(P)H-flavin reductase; Catalyzes the reduction of soluble flavins by reduced pyridine nucleotides; Belongs to the Fre/LuxG FAD/NAD(P) flavoprotein oxidoreductase family.
  
    0.895
trkH
Potassium transporter; Low-affinity potassium transport system. Interacts with Trk system potassium uptake protein TrkA. Requires TrkE (sapD) for transport activity, 20% more uptake is seen with both SapD and SapF. Transport in the absence of SapD and SapF is dependent on a high membrane potential and a high cytoplasmic ATP concentration, suggesting this protein may be able to interact with other ATP-binding proteins. Can transport potassium and rubidium.
 
    0.866
ubiJ
Aerobic ubiquinone synthesis protein, SCP2 family protein; Required for ubiquinone (coenzyme Q) biosynthesis under aerobic conditions. Binds hydrophobic ubiquinone biosynthetic intermediates via its SCP2 domain and is essential for the stability of the Ubi complex. May constitute a docking platform where Ubi enzymes assemble and access their SCP2-bound polyprenyl substrates.
   
  
 0.856
ubiG
Bifunctional 3-demethylubiquinone-9 3-methyltransferase/ 2-octaprenyl-6-hydroxy phenol methylase; O-methyltransferase that catalyzes the 2 O-methylation steps in the ubiquinone biosynthetic pathway.
      
 0.824
ubiF
2-octaprenyl-3-methyl-6-methoxy-1,4-benzoquinol oxygenase; Catalyzes the hydroxylation of 2-octaprenyl-3-methyl-6- methoxy-1,4-benzoquinol during ubiquinone biosynthesis.
     
 0.803
ubiC
Chorismate pyruvate-lyase; Removes the pyruvyl group from chorismate, with concomitant aromatization of the ring, to provide 4-hydroxybenzoate (4HB) for the ubiquinone pathway.
  
  
 0.767
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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