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:
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Gene Fusion
Cooccurrence
Coexpression
Experiments
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[Homology]
Score
ubiBRegulator of octaprenylphenol hydroxylation, ubiquinone synthesis; Is probably a protein kinase regulator of UbiI activity which is involved in aerobic coenzyme Q (ubiquinone) biosynthesis. Belongs to the ABC1 family. UbiB subfamily. (546 aa)    
Predicted Functional Partners:
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).
 
  
 0.967
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.
  
  
 0.913
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.
  
 
 
 0.808
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.
  
 
 0.787
tatC
TatABCE protein translocation system subunit; Part of the twin-arginine translocation (Tat) system that transports large folded proteins containing a characteristic twin- arginine motif in their signal peptide across membranes. Together with TatB, TatC is part of a receptor directly interacting with Tat signal peptides.
  
  
 0.757
tatB
TatABCE protein translocation system subunit; Part of the twin-arginine translocation (Tat) system that transports large folded proteins containing a characteristic twin- arginine motif in their signal peptide across membranes. Together with TatC, TatB is part of a receptor directly interacting with Tat signal peptides. TatB may form an oligomeric binding site that transiently accommodates folded Tat precursor proteins before their translocation.
  
  
 0.755
tatA
TatABCE protein translocation system subunit; Part of the twin-arginine translocation (Tat) system that transports large folded proteins containing a characteristic twin- arginine motif in their signal peptide across membranes. TatA could form the protein-conducting channel of the Tat system. Belongs to the TatA/E family.
  
  
 0.725
ubiD
3-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.
  
  
 0.719
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.
  
 
 0.714
ubiH
2-octaprenyl-6-methoxyphenol hydroxylase, FAD/NAD(P)-binding; Is likely an oxygenase that introduces the hydroxyl group at carbon four of 2-octaprenyl-6-methoxyphenol resulting in the formation of 2-octaprenyl-6-methoxy-1,4-benzoquinol.
  
 
 0.667
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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