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
gptXanthine-guanine phosphoribosyltransferase; Acts on guanine, xanthine and to a lesser extent hypoxanthine; Belongs to the purine/pyrimidine phosphoribosyltransferase family. XGPT subfamily. (176 aa)    
Predicted Functional Partners:
guaB
Inosine-5'-monophosphate dehydrogenase; Catalyzes the conversion of inosine 5'-phosphate (IMP) to xanthosine 5'-phosphate (XMP), the first committed and rate-limiting step in the de novo synthesis of guanine nucleotides, and therefore plays an important role in the regulation of cell growth. Belongs to the IMPDH/GMPR family.
  
 
 0.946
apt
Adenine phosphoribosyltransferase; Catalyzes a salvage reaction resulting in the formation of AMP, that is energically less costly than de novo synthesis.
  
 0.922
apt-2
Adenine phosphoribosyltransferase.
  
 0.922
guaA
GMP synthase putative; Catalyzes the synthesis of GMP from XMP.
  
 
 0.918
gmk
Guanylate kinase, putative; Essential for recycling GMP and indirectly, cGMP.
   
 0.914
RD1_3134
Inosine-uridine preferring nucleoside hydrolase, putative.
    
 0.910
RD1_0427
Ham1 protein-like protein; Pyrophosphatase that catalyzes the hydrolysis of nucleoside triphosphates to their monophosphate derivatives, with a high preference for the non-canonical purine nucleotides XTP (xanthosine triphosphate), dITP (deoxyinosine triphosphate) and ITP. Seems to function as a house-cleaning enzyme that removes non-canonical purine nucleotides from the nucleotide pool, thus preventing their incorporation into DNA/RNA and avoiding chromosomal lesions. Belongs to the HAM1 NTPase family.
  
 
  0.904
deoD
Purine nucleoside phosphorylase.
    
  0.902
RD1_3133
mazG family protein.
     
 0.902
RD1_3959
Putative 5-nucleotidase; Belongs to the 5'-nucleotidase family.
     
 0.901
Your Current Organism:
Roseobacter denitrificans
NCBI taxonomy Id: 375451
Other names: Erythrobacter sp. OCh114, R. denitrificans OCh 114, Roseobacter denitrificans ATCC 33942, Roseobacter denitrificans DSM 7001, Roseobacter denitrificans OCh 114, Roseobacter denitrificans str. OCh 114, Roseobacter denitrificans strain OCh 114, Roseobacter sp. OCh114
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