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Identification
YMDB IDYMDB00555
NameHypoxanthine
SpeciesSaccharomyces cerevisiae
StrainBaker's yeast
DescriptionHypoxanthine, also known as purine-6-ol or Hyp, belongs to the class of organic compounds known as hypoxanthines. Hypoxanthines are compounds containing the purine derivative 1H-purin-6(9H)-one. Purine is a bicyclic aromatic compound made up of a pyrimidine ring fused to an imidazole ring. Hypoxanthine is a moderately basic compound (based on its pKa). Hypoxanthine exists in all living species, ranging from bacteria to humans. Hypoxanthine is a potentially toxic compound.
Structure
Thumb
Synonyms
  • 1,7-Dihydro-6H-purin-6-one
  • 1,7-Dihydro-6H-purine-6-one
  • 1H,7H-Hypoxanthine
  • 3H-Purin-6-ol
  • 4-Hydroxy-1H-purine
  • 6-Hydroxy-1H-purine
  • 6-Hydroxypurine
  • 6-Oxopurine
  • 6(1H)-Purinone
  • 7H-Purin-6-ol
  • 9H-Purin-6-ol
  • 9H-Purin-6(1H)-one
  • Hypoxanthine enol
  • Purin-6-ol
  • Purin-6(1H)-one
  • Purin-6(3H)-one
  • Purine-6-ol
  • Sarcine
  • Sarkin
  • Sarkine
  • Hyp
CAS number68-94-0
WeightAverage: 136.1115
Monoisotopic: 136.03851077
InChI KeyFDGQSTZJBFJUBT-UHFFFAOYSA-N
InChIInChI=1S/C5H4N4O/c10-5-3-4(7-1-6-3)8-2-9-5/h1-2H,(H2,6,7,8,9,10)
IUPAC Name7H-purin-6-ol
Traditional IUPAC Name6-hydroxypurine
Chemical FormulaC5H4N4O
SMILESO=C1NC=NC2=C1NC=N2
Chemical Taxonomy
Description belongs to the class of organic compounds known as hypoxanthines. Hypoxanthines are compounds containing the purine derivative 1H-purin-6(9H)-one. Purine is a bicyclic aromatic compound made up of a pyrimidine ring fused to an imidazole ring.
KingdomOrganic compounds
Super ClassOrganoheterocyclic compounds
ClassImidazopyrimidines
Sub ClassPurines and purine derivatives
Direct ParentHypoxanthines
Alternative Parents
Substituents
  • 6-oxopurine
  • Hypoxanthine
  • Pyrimidone
  • Pyrimidine
  • Azole
  • Imidazole
  • Vinylogous amide
  • Heteroaromatic compound
  • Azacycle
  • Organic oxide
  • Organopnictogen compound
  • Organooxygen compound
  • Organonitrogen compound
  • Organic nitrogen compound
  • Organic oxygen compound
  • Hydrocarbon derivative
  • Aromatic heteropolycyclic compound
Molecular FrameworkAromatic heteropolycyclic compounds
External Descriptors
Physical Properties
StateSolid
Charge0
Melting point150 °C
Experimental Properties
PropertyValueReference
Water Solubility0.7 mg/mL at 23 oC [YALKOWSKY,SH & DANNENFELSER,RM (1992)]PhysProp
LogP-1.11 [HANSCH,C ET AL. (1995)]PhysProp
Predicted Properties
PropertyValueSource
Water Solubility13 g/LALOGPS
logP-0.55ALOGPS
logP-0.048ChemAxon
logS-1ALOGPS
pKa (Strongest Acidic)8.72ChemAxon
pKa (Strongest Basic)1.73ChemAxon
Physiological Charge0ChemAxon
Hydrogen Acceptor Count4ChemAxon
Hydrogen Donor Count2ChemAxon
Polar Surface Area74.69 ŲChemAxon
Rotatable Bond Count0ChemAxon
Refractivity35.5 m³·mol⁻¹ChemAxon
Polarizability11.82 ųChemAxon
Number of Rings2ChemAxon
Bioavailability1ChemAxon
Rule of FiveYesChemAxon
Ghose FilterYesChemAxon
Veber's RuleYesChemAxon
MDDR-like RuleYesChemAxon
Biological Properties
Cellular Locations
  • extracellular
  • cytoplasm
Organoleptic PropertiesNot Available
SMPDB PathwaysNot Available
KEGG Pathways
Purine metabolismec00230 Map00230
SMPDB ReactionsNot Available
KEGG Reactions
water + hydron + AdenineHypoxanthine + Ammonium
Hypoxanthine + Phosphoribosyl pyrophosphatePyrophosphate + Inosinic acid
2'-Deoxyinosine + phosphateHypoxanthine + 2-deoxy-D-ribofuranose 1-phosphate
phosphate + InosineHypoxanthine + Ribose 1-phosphate
Concentrations
Intracellular ConcentrationsNot Available
Extracellular ConcentrationsNot Available
Spectra
Spectra
References
References:
  • UniProt Consortium (2011). "Ongoing and future developments at the Universal Protein Resource." Nucleic Acids Res 39:D214-D219.21051339
  • Herrgard, M. J., Swainston, N., Dobson, P., Dunn, W. B., Arga, K. Y., Arvas, M., Bluthgen, N., Borger, S., Costenoble, R., Heinemann, M., Hucka, M., Le Novere, N., Li, P., Liebermeister, W., Mo, M. L., Oliveira, A. P., Petranovic, D., Pettifer, S., Simeonidis, E., Smallbone, K., Spasic, I., Weichart, D., Brent, R., Broomhead, D. S., Westerhoff, H. V., Kirdar, B., Penttila, M., Klipp, E., Palsson, B. O., Sauer, U., Oliver, S. G., Mendes, P., Nielsen, J., Kell, D. B. (2008). "A consensus yeast metabolic network reconstruction obtained from a community approach to systems biology." Nat Biotechnol 26:1155-1160.18846089
Synthesis Reference: Shaw, Elliott.New synthesis of the purines adenine, hypoxanthine, xanthine, and isoguanine. Journal of Biological Chemistry (1950), 185 439-47.
External Links:
ResourceLink
CHEBI ID17368
HMDB IDHMDB00157
Pubchem Compound ID790
Kegg IDC00262
ChemSpider ID768
FOODB IDFDB003949
WikipediaHypoxanthine
BioCyc IDHYPOXANTHINE

Enzymes

General function:
Involved in purine-nucleoside phosphorylase activity
Specific function:
Cleavage of guanosine or inosine to respective bases and sugar-1-phosphate molecules
Gene Name:
PNP1
Uniprot ID:
Q05788
Molecular weight:
33754.60156
Reactions
Purine nucleoside + phosphate → purine + alpha-D-ribose 1-phosphate.
General function:
Involved in deaminase activity
Specific function:
Adenosine + H(2)O = inosine + NH(3)
Gene Name:
AAH1
Uniprot ID:
P53909
Molecular weight:
39634.69922
Reactions
Adenosine + H(2)O → inosine + NH(3).
General function:
Involved in nucleoside metabolic process
Specific function:
IMP + diphosphate = hypoxanthine + 5-phospho- alpha-D-ribose 1-diphosphate
Gene Name:
HPT1
Uniprot ID:
Q04178
Molecular weight:
25190.5
Reactions
IMP + diphosphate → hypoxanthine + 5-phospho-alpha-D-ribose 1-diphosphate.
GMP + diphosphate → guanine + 5-phospho-alpha-D-ribose 1-diphosphate.