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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[Homology]
Score
hdeBAcid stress chaperone HdeB; Required for optimal acid stress protection, which is important for survival of enteric bacteria in the acidic environment of the host stomach. Exhibits a chaperone-like activity at acidic pH by preventing the aggregation of many different periplasmic proteins. Belongs to the HdeB family. (112 aa)    
Predicted Functional Partners:
hdeA
Conserved hypothetical protein; Required for optimal acid stress protection. Exhibits a chaperone-like activity only at low pH by suppressing non-specifically the aggregation of denaturated periplasmic proteins. Belongs to the HdeA family.
  
  
 0.981
hdeD
Conserved hypothetical protein; Code: S; COG: COG3247.
  
  
 0.954
gadC_1
Putative amino acid antiporter; Code: E; COG: COG0531.
   
  
 0.751
xasA
Acid sensitivity protein, putative transporter; Involved in glutamate-dependent acid resistance. Imports glutamate inside the cell while simultaneously exporting to the periplasm the GABA produced by GadA and GadB. The gad system helps to maintain a near-neutral intracellular pH when cells are exposed to extremely acidic conditions. The ability to survive transit through the acidic conditions of the stomach is essential for successful colonization of the mammalian host by commensal and pathogenic bacteria (By similarity); Belongs to the amino acid-polyamine-organocation (APC) superfami [...]
   
  
 0.748
yhiE
Conserved hypothetical protein; Regulates the expression of several genes involved in acid resistance. Required for the expression of gadA and gadBC, among others, regardless of media or growth conditions. Binds directly to the 20 bp GAD box found in the control regions of both loci (By similarity).
   
  
 0.723
gadB
Glutamate decarboxylase isozyme; Converts glutamate to gamma-aminobutyrate (GABA), consuming one intracellular proton in the reaction. The gad system helps to maintain a near-neutral intracellular pH when cells are exposed to extremely acidic conditions. The ability to survive transit through the acidic conditions of the stomach is essential for successful colonization of the mammalian host by commensal and pathogenic bacteria (By similarity).
   
  
 0.533
yhiX
Putative ARAC-type regulatory protein; Positively regulates the expression of about fifteen genes involved in acid resistance such as gadA, gadB and gadC. Depending on the conditions (growth phase and medium), can repress gadW (By similarity).
   
  
 0.531
yhiW
Putative ARAC-type regulatory protein; Depending on the conditions (growth phase and medium), acts as a positive or negative regulator of gadA and gadBC. Repression occurs directly or via the repression of the expression of gadX. Activation occurs directly by the binding of GadW to the gadA and gadBC promoters (By similarity).
   
  
 0.435
gadA
Glutamate decarboxylase isozyme; Converts glutamate to gamma-aminobutyrate (GABA), consuming one intracellular proton in the reaction. The gad system helps to maintain a near-neutral intracellular pH when cells are exposed to extremely acidic conditions. The ability to survive transit through the acidic conditions of the stomach is essential for successful colonization of the mammalian host by commensal and pathogenic bacteria (By similarity).
   
  
 0.418
ydeO
Putative ARAC-type regulatory protein; Induces the expression of gadE. Could also regulate the expression of other genes involved in acid resistance (By similarity).
   
  
 0.400
Your Current Organism:
Shigella flexneri
NCBI taxonomy Id: 198214
Other names: S. flexneri 2a str. 301, Shigella flexneri 2a str. 301, Shigella flexneri serotype 2a str. 301
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