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
puuDGamma-glutamyl-gamma-aminobutyrate hydrolase; Involved in the breakdown of putrescine via hydrolysis of the gamma-glutamyl linkage of gamma-glutamyl-gamma-aminobutyrate. (254 aa)    
Predicted Functional Partners:
puuA
Glutamate--putrescine ligase; Involved in the breakdown of putrescine via the biosynthesis of gamma-L-glutamylputrescine. It is able to use several diamines, spermidine and spermine. Absolutely essential to utilize putrescine as both nitrogen and carbon sources and to decrease the toxicity of putrescine, which can lead to inhibition of cell growth and protein synthesis; Belongs to the glutamine synthetase family.
 
  
 0.996
puuR
Repressor for the divergent puu operons, putrescine inducible; Represses puuA, puuD and puuP.
 
  
 0.992
puuC
Gamma-glutamyl-gamma-aminobutyraldehyde dehydrogenase; Catalyzes the oxidation of 3-hydroxypropionaldehyde (3-HPA) to 3-hydroxypropionic acid (3-HP). It acts preferentially with NAD but can also use NADP. 3-HPA appears to be the most suitable substrate for PuuC followed by isovaleraldehyde, propionaldehyde, butyraldehyde, and valeraldehyde. It might play a role in propionate and/or acetic acid metabolisms. Also involved in the breakdown of putrescine through the oxidation of gamma-Glu-gamma-aminobutyraldehyde to gamma-Glu-gamma-aminobutyrate (gamma-Glu-GABA).
 
 
 0.991
puuB
Gamma-glutamylputrescine oxidoreductase; Involved in the breakdown of putrescine via the oxidation of L-glutamylputrescine.
 
  
 0.988
puuE
4-aminobutyrate aminotransferase, PLP-dependent; Catalyzes the transfer of the amino group from gamma- aminobutyrate (GABA) to alpha-ketoglutarate (KG) to yield succinic semialdehyde (SSA). PuuE is important for utilization of putrescine as the sole nitrogen or carbon source; Belongs to the class-III pyridoxal-phosphate-dependent aminotransferase family.
 
 
 0.983
patD
Gamma-aminobutyraldehyde dehydrogenase; Catalyzes the oxidation 4-aminobutanal (gamma- aminobutyraldehyde) to 4-aminobutanoate (gamma-aminobutyrate or GABA). This is the second step in one of two pathways for putrescine degradation, where putrescine is converted into 4-aminobutanoate via 4-aminobutanal, which allows E.coli to grow on putrescine as the sole nitrogen source. Also functions as a 5-aminopentanal dehydrogenase in a a L-lysine degradation pathway to succinate that proceeds via cadaverine, glutarate and L-2-hydroxyglutarate. Can also oxidize n-alkyl medium-chain aldehydes, bu [...]
  
 
 0.952
gabT
4-aminobutyrate aminotransferase, PLP-dependent; Pyridoxal phosphate-dependent enzyme that catalyzes transamination between primary amines and alpha-keto acids. Catalyzes the transfer of the amino group from gamma-aminobutyrate (GABA) to alpha-ketoglutarate (KG) to yield succinic semialdehyde (SSA) and glutamate. Thereby functions in a GABA degradation pathway that allows some E.coli strains to utilize GABA as a nitrogen source for growth. Also catalyzes the conversion of 5-aminovalerate to glutarate semialdehyde, as part of a L-lysine degradation pathway that proceeds via cadaverine, [...]
 
 
 0.913
glnA
Glutamine synthetase; Catalyzes the ATP-dependent biosynthesis of glutamine from glutamate and ammonia.
  
 
 0.832
puuP
Putrescine importer; Involved in the uptake of putrescine. Belongs to the amino acid-polyamine-organocation (APC) superfamily.
  
  
 0.831
gltB
Glutamate synthase, large subunit; Catalyzes the conversion of L-glutamine and 2-oxoglutarate into two molecules of L-glutamate.
    
  0.813
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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