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PNP1 protein (Saccharomyces cerevisiae) - STRING interaction network
"PNP1" - Purine nucleoside phosphorylase, specifically metabolizes inosine and guanosine nucleosides in Saccharomyces cerevisiae
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Known Interactions
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experimentally determined
Predicted Interactions
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textmining
co-expression
protein homology
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PNP1Purine nucleoside phosphorylase, specifically metabolizes inosine and guanosine nucleosides; involved in the nicotinamide riboside salvage pathway; The purine nucleoside phosphorylases catalyze the phosphorolytic breakdown of the N-glycosidic bond in the beta- (deoxy)ribonucleoside molecules, with the formation of the corresponding free purine bases and pentose-1-phosphate. Cleaves guanosine and inosine (By similarity) (311 aa)    
Predicted Functional Partners:
URH1
Uridine nucleosidase (uridine-cytidine N-ribohydrolase), cleaves N-glycosidic bonds in nucleosides; involved in the pyrimidine salvage and nicotinamide riboside salvage pathways; Also acts on cytidine (340 aa)
     
  0.997
SDT1
Pyrimidine nucleotidase; overexpression suppresses the 6-AU sensitivity of transcription elongation factor S-II, as well as resistance to other pyrimidine derivatives; Could be an enzyme that inactivates 6-azauracil by modifying it (280 aa)
   
 
  0.993
GUD1
Guanine deaminase, a catabolic enzyme of the guanine salvage pathway producing xanthine and ammonia from guanine; activity is low in exponentially-growing cultures but expression is increased in post-diauxic and stationary-phase cultures; Catalyzes the hydrolytic deamination of guanine, producing xanthine and ammonia (489 aa)
   
 
  0.990
NRK1
Nicotinamide riboside kinase, catalyzes the phosphorylation of nicotinamide riboside and nicotinic acid riboside in salvage pathways for NAD+ biosynthesis; Catalyzes the phosphorylation of nicotinamide riboside (NR) and nicotinic acid riboside (NaR) to form nicotinamide mononucleotide (NMN) and nicotinic acid mononucleotide (NaMN) (240 aa)
     
  0.989
AAH1
Adenine deaminase (adenine aminohydrolase), converts adenine to hypoxanthine; involved in purine salvage; transcriptionally regulated by nutrient levels and growth phase; Aah1p degraded upon entry into quiescence via SCF and the proteasome; Catalyzes the hydrolytic deamination of adenine to hypoxanthine. Plays an important role in the purine salvage pathway and in nitrogen catabolism. Also exhibits a low activity towards N(6)-substituted adenines that are commonly known as the plant hormones cytokinins (347 aa)
   
 
  0.988
HPT1
Dimeric hypoxanthine-guanine phosphoribosyltransferase, catalyzes the formation of both inosine monophosphate and guanosine monophosphate; mutations in the human homolog HPRT1 can cause Lesch-Nyhan syndrome and Kelley-Seegmiller syndrome; Converts guanine to guanosine monophosphate, and hypoxanthine to inosine monophosphate. Transfers the 5- phosphoribosyl group from 5-phosphoribosylpyrophosphate onto the purine. Plays a central role in the generation of purine nucleotides through the purine salvage pathway (221 aa)
       
  0.986
FCY1
Cytosine deaminase, zinc metalloenzyme that catalyzes the hydrolytic deamination of cytosine to uracil; of biomedical interest because it also catalyzes the deamination of 5-fluorocytosine (5FC) to form anticancer drug 5-fluorouracil (5FU); Converts cytosine to uracil or 5-methylcytosine to thymine by deaminating carbon number 4 (158 aa)
       
  0.982
ADO1
Adenosine kinase, required for the utilization of S-adenosylmethionine (AdoMet); may be involved in recycling adenosine produced through the methyl cycle; ATP dependent phosphorylation of adenosine and other related nucleoside analogs to monophosphate derivatives. ADO1 does not play a major role in adenine utilization in yeast. Its physiological role could primarily be to recycle adenosine produced by the methyl cycle (340 aa)
       
  0.980
APT1
Adenine phosphoribosyltransferase, catalyzes the formation of AMP from adenine and 5-phosphoribosylpyrophosphate; involved in the salvage pathway of purine nucleotide biosynthesis; Catalyzes a salvage reaction resulting in the formation of AMP, that is energically less costly than de novo synthesis (187 aa)
       
  0.978
APT2
Apparent pseudogene, not transcribed or translated under normal conditions; encodes a protein with similarity to adenine phosphoribosyltransferase, but artificially expressed protein exhibits no enzymatic activity; Catalyzes a salvage reaction resulting in the formation of AMP, that is energically less costly than de novo synthesis. May lack catalytic activity (181 aa)
       
  0.978
Your Current Organism:
Saccharomyces cerevisiae
NCBI taxonomy Id: 4932
Other names: Candida robusta, Pachytichospora, S. cerevisiae, Saccharomyces, Saccharomyces capensis, Saccharomyces cerevisiae, Saccharomyces italicus, Saccharomyces oviformis, Saccharomyces uvarum var. melibiosus, lager beer yeast, yeast
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