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
napDConserved hypothetical protein; Chaperone for NapA, the catalytic subunit of the periplasmic nitrate reductase. It binds directly and specifically to the twin- arginine signal peptide of NapA, preventing premature interaction with the Tat translocase and premature export. (87 aa)    
Predicted Functional Partners:
napF
Ferredoxin-type protein; Code: C; COG: COG1145.
 
  
 0.998
napA
Probable nitrate reductase 3; Catalytic subunit of the periplasmic nitrate reductase complex NapAB. Receives electrons from NapB and catalyzes the reduction of nitrate to nitrite.
 
 
 0.997
napB
Cytochrome c-type protein; Electron transfer subunit of the periplasmic nitrate reductase complex NapAB. Receives electrons from the membrane-anchored tetraheme c-type NapC protein and transfers these to NapA subunit, thus allowing electron flow between membrane and periplasm. Essential for periplasmic nitrate reduction with nitrate as the terminal electron acceptor (By similarity); Belongs to the NapB family.
 
  
 0.993
napH
Ferredoxin-type protein; Code: C; COG: COG0348.
 
  
 0.989
napG
Ferredoxin-type protein; Required for electron transfer from ubiquinol, via NapC, to the periplasmic nitrate reductase NapAB complex.
 
  
 0.978
napC
Cytochrome c-type protein; Code: C; COG: COG3005.
 
  
 0.964
yccT
Conserved hypothetical protein; Code: S; COG: COG3110; Belongs to the UPF0319 family.
  
   
 0.917
ccmD
Heme exporter protein C; Required for the export of heme to the periplasm for the biogenesis of c-type cytochromes; Belongs to the CcmD/CycX/HelD family.
 
     0.846
ccmA
ATP-binding protein of heme exporter A; Part of the ABC transporter complex CcmAB involved in the biogenesis of c-type cytochromes; once thought to export heme, this seems not to be the case, but its exact role is uncertain. Responsible for energy coupling to the transport system; Belongs to the ABC transporter superfamily. CcmA exporter (TC 3.A.1.107) family.
 
    0.827
ccmB
Heme exporter protein B, cytochrome c-type biogenesis protein; Required for the export of heme to the periplasm for the biogenesis of c-type cytochromes; Belongs to the CcmB/CycW/HelB family.
 
     0.820
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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