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:
some 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
Cooccurence
Coexpression
Experiments
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[Homology]
Score
stpADna-binding transcriptional repressor stpa with rna chaperone activity; A DNA-binding protein that acts in a fashion similar to H-NS protein upon overexpression, represses a number of genes including the cryptic blg operon, hns, papB and the proU locus . A subset of H-NS/StpA-regulated genes also require Hha for repression; Hha and Cnu (YdgT) increases the number of genes DNA bound by H-NS/StpA and may also modulate the oligomerization of the H-NS/StpA-complex . Repression can be inhibited by dominant-negative mutants of StpA or H-NS (134 aa)    
Predicted Functional Partners:
cnu
Nucleoid-associated oric-binding protein; Modifies the set of genes regulated by H-NS; Hha and Cnu (YdgT) increase the number of genes bound by H-NS/StpA and may also modulate the oligomerization of the H-NS/StpA-complex on DNA . The complex formed with H-NS binds to the specific 26-bp cnb site in the origin of replication oriC . Can complement, at least partially, the absence of the Hha protein in hha mutants
    
 
 0.952
hha
Haemolysin expression modulating protein; Down-regulates hemolysin (hly) expression in complex with H- NS . Stimulates transposition events in vivo . Modifies the set of genes regulated by H-NS; Hha and Cnu (YdgT) increase the number of genes DNA bound by H-NS/StpA and may also modulate the oligomerization of the H-NS/StpA-complex . Binds DNA and influences DNA topology in response to environmental stimuli; does not however interact with DNA in the absence of H-NS . Involved in persister cell formation, acting downstream of mRNA interferase (toxin) MqsR . Decreases biofilm formation by [...]
  
 
 
 0.947
hns
A DNA-binding protein implicated in transcriptional repression (silencing) Also involved in bacterial chromosome organization and compaction . H-NS binds tightly to AT-rich dsDNA and inhibits transcription Binds upstream and downstream of initiating RNA polymerase, trapping it in a loop and preventing transcription . Binds to hundreds of sites, approximately half its binding sites are in non-coding DNA, which only accounts for about 10% of the genome . Many of these loci were horizontally transferred (HTG); this offers the selective advantage of silencing foreign DNA while keeping it i [...]
  
 
 
0.874
fis
Fis family transcriptional regulator, factor for inversion stimulation protein; Activates ribosomal RNA transcription, as well other genes. Plays a direct role in upstream activation of rRNA promoters. Binds to a recombinational enhancer sequence that is required to stimulate hin- mediated DNA inversion. Prevents initiation of DNA replication from oriC. Binds to hundreds of transcriptionally active and inactive AT- rich sites, approximately half its binding sites are in non-coding DNA, which only accounts for about 10% of the genome
      
 0.732
bglJ
Luxr family transcriptional regulator, regulator of transport and utilization of aryl beta-glucosides; A crytic transcriptional activator. When its expression is induced it relieves H-NS repression of the bgl operon. Acts independently of transcription factor LeuO
      
 0.732
leuO
Lysr family transcriptional regulator, transcriptional activator for leuabcd operon; A global transcription factor. Activates transcription of the 9 following operons; yjjQ-bglJ, yjjP, acrEF, ybdO, yjcRQP, casABCDE12, rhsD-ybbC, fepE and gltF, in most cases it probably interferes with silencing by H-NS and activates transcription. Represses transcription of the 3 following operons; uxaCA, sdaCB and btsT. H-NS repression of the bgl operon, leading to the ability to metabolize some beta- glucosides. It also directly activates the bgl operon. Activation is H- NS and BglJ-RcsB independent
      
 0.705
hfq
Rna-binding protein hfq; RNA chaperone that binds small regulatory RNA (sRNAs) and mRNAs to facilitate mRNA translational regulation in response to envelope stress, environmental stress and changes in metabolite concentrations. Involved in the regulation of stress responses mediated by the sigma factors RpoS, sigma-E and sigma-32 . Binds with high specificity to tRNAs . Binds sRNA antitoxin RalA . In vitro, stimulates synthesis of long tails by poly(A) polymerase I . Required for RNA phage Qbeta replication . Seems to play a role in persister cell formation; upon overexpression decreas [...]
      
 0.694
yciS
DUF1049 family inner membrane protein, function unknown; Involved in the assembly of lipopolysaccharide (LPS)
  
     0.682
seqA
Seqa, negative modulator of initiation of replication; Negative regulator of replication initiation, which contributes to regulation of DNA replication and ensures that replication initiation occurs exactly once per chromosome per cell cycle. Binds to pairs of hemimethylated GATC sequences in the oriC region, thus preventing assembly of replication proteins and re- initiation at newly replicated origins. Repression is relieved when the region becomes fully methylated. Can also bind to hemimethylated GATC sequences outside of oriC region. Binds, with less affinity, to fully methylated G [...]
  
   
 0.642
lrp
Lrp/asnc family transcriptional regulator, leucine-responsive regulatory protein; Mediates a global response to leucine. Exogenous leucine affects the expression of a number of different operons; lrp mediates this effect for at least some of these operons. For example it is regulator of the branched-chain amino acid transport genes
  
   
 0.631
Your Current Organism:
Escherichia coli K12 MG1655
NCBI taxonomy Id: 511145
Other names: E. coli str. K-12 substr. MG1655, Escherichia coli K12 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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