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
guaBInosine-5'-monophosphate dehydrogenase, (guaB); 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. (496 aa)    
Predicted Functional Partners:
guaAB
GMP synthase (guaA); Catalyzes the synthesis of GMP from XMP.
 0.999
purA
Adenylosuccinate synthetase (purA); Plays an important role in the de novo pathway of purine nucleotide biosynthesis. Catalyzes the first committed step in the biosynthesis of AMP from IMP; Belongs to the adenylosuccinate synthetase family.
  
 
 0.998
guaAA
GMP synthase (guaA); Catalyzes the synthesis of GMP from XMP.
 
 
 0.993
surE
surE stationary-phase survival protein SurE; Nucleotidase that shows phosphatase activity on nucleoside 5'-monophosphates; Belongs to the SurE nucleotidase family.
    
 0.983
purB
Adenylosuccinate lyase (purB); Similar to GB:J02732 SP:P12047 PID:143366 GB:AL009126 percent identity: 42.51; identified by sequence similarity; putative.
  
  
 0.973
MJ_0226
Conserved hypothetical protein; Pyrophosphatase that catalyzes the hydrolysis of nucleoside triphosphates to their monophosphate derivatives, with a high preference for the non-canonical purine nucleotides xanthosine triphosphate (XTP), deoxyinosine triphosphate (dITP) and ITP. Probably functions 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. Shows very low activity on GTP or dGTP, both of which are hydrolyzed more than 100-fold less efficiently than X [...]
  
 0.957
purF
Amidophosphoribosyltransferase (purF); Catalyzes the formation of phosphoribosylamine from phosphoribosylpyrophosphate (PRPP) and glutamine.
  
 
 0.950
MJ_0406
Ribokinase (rbsK); Catalyzes the phosphorylation of a wide range of nucleosides to yield nucleoside monophosphates. Shows the highest activity for inosine, guanosine and cytidine, but very poor kinase activity with adenosine, thymidine, uridine and xanthosine. ATP is the best phosphate donor, but can also use ITP and GTP. Shows extremely low activity with fructose-6-phosphate; Belongs to the carbohydrate kinase PfkB family.
  
 
 0.923
purO
Conserved hypothetical protein; Catalyzes the cyclization of 5-formylamidoimidazole-4- carboxamide ribonucleotide to IMP; Belongs to the archaeal IMP cyclohydrolase family.
    
 0.916
MJ_1617
Hypothetical protein; Identified by GeneMark; putative; M. jannaschii predicted coding region MJ1617.
       0.890
Your Current Organism:
Methanocaldococcus jannaschii
NCBI taxonomy Id: 243232
Other names: M. jannaschii DSM 2661, Methanocaldococcus jannaschii DSM 2661, Methanocaldococcus jannaschii str. DSM 2661, Methanococcus jannaschii DSM 2661
Server load: low (22%) [HD]