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
prsWProtease required for RsiW anti-sigma(W) degradation; Involved in the degradation of anti-sigma-W factor RsiW. Responsible for Site-1 cleavage of the RsiW anti-sigma factor. This results, after two other proteolytic steps catalyzed by the RasP and ClpXP proteases, in the release of SigW and the transcription activation of the genes under the control of the sigma-W factor. Seems to be responsible for sensing antimicrobial peptides that damage the cell membrane and other agents that cause cell envelope stress. Therefore it is a protease governing regulated intramembrane proteolysis and r [...] (218 aa)    
Predicted Functional Partners:
rsiW
anti-sigma(W) factor; The anti-sigma factor for extracytoplasmic function (ECF) sigma factor sigma-W (SigW). Holds SigW, its cognate ECF sigma factor, in an inactive form until released by regulated intramembrane proteolysis (RIP). SigW and RsiW mediate cell response to cell wall stress. RIP occurs when an extracytoplasmic signal triggers a concerted proteolytic cascade to transmit information and elicit cellular responses. The membrane-spanning regulatory substrate protein is first cut periplasmically (site-1 protease, S1P, PrsW) , then within the membrane itself (site-2 protease, S2P [...]
  
   
 0.993
rseP
Regulator of sigma-W protease RasP; Is responsible for site-2 cleavage of the RsiW anti-sigma factor. This results, after a third proteolytic step catalyzed by the ClpXP protease, in the release of SigW and the transcription activation of the genes under the control of the sigma-W factor. Can also cleave liberated signal peptides of PenP and Mpr, probably within in the cell membrane.
      
 0.920
sigW
RNA polymerase ECF(extracytoplasmic function)-type sigma factor W; Sigma factors are initiation factors that promote the attachment of RNA polymerase to specific initiation sites and are then released. Sigma-W controls genes involved in response to cell envelope stress such as antimicrobial peptides , alkaline pH , transport processes and detoxification.
  
   
 0.810
ysdB
Conserved hypothetical protein; May mediate a negative feedback loop that down-regulates the expression of the sigma-W regulon following the activation of sigma-W in response to conditions of cell envelope stress. Might interact with and inhibit the activity of the protease PrsW, or could bind to the anti-sigma-W factor RsiW and thereby protect it from PrsW-mediated cleavage.
  
  
 0.759
yshE
Putative integral inner membrane protein; Evidence 3: Function proposed based on presence of conserved amino acid motif, structural feature or limited homology; Product type pm: putative membrane component.
  
     0.700
htrB
HtrA-like serine protease; Degrades abnormal exported proteins and responsible for the propeptide processing of a natural pro-protein and for the maturation of a native protein. It also plays a prominent role in stress (heat shock, ethanol, puromycin and NaCl) resistance during active exponential growth (Probable); Belongs to the peptidase S1C family.
     
 0.691
htpX
Membrane protease; Evidence 2a: Function of homologous gene experimentally demonstrated in an other organism; Product type e: enzyme; Belongs to the peptidase M48B family.
   
  
 0.634
sleB
Spore cortex-lytic enzyme; Could be a lytic transglycosylase. Required for spore cortex hydrolysis during germination. Interacts strongly but noncovalently with spore components.
 
    0.610
sipS
Type I signal peptidase; Not essential for cell viability, but required for efficient secretion of many proteins.
   
  
 0.577
ypdA
Putative FAD-dependent disulfide oxidoreductase; Evidence 3: Function proposed based on presence of conserved amino acid motif, structural feature or limited homology; Product type pe: putative enzyme.
  
    0.574
Your Current Organism:
Bacillus subtilis 168
NCBI taxonomy Id: 224308
Other names: B. subtilis subsp. subtilis str. 168, Bacillus subtilis subsp. subtilis 168, Bacillus subtilis subsp. subtilis str. 168, Bacillus subtilis subsp. subtilis str. BGSC 1A700
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