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Record Information
Created at2005-11-16 15:48:42 UTC
Updated at2020-11-24 22:18:47 UTC
NP-MRD IDNP0000848
Secondary Accession NumbersNone
Natural Product Identification
Common Name7-Methylguanosine
Description7-Methylguanosine is an endogenous methylated nucleoside found in human fluids; methylated purine bases are present in higher amounts in tumor-bearing patients compared to healthy controls.DNA hypermethylation is a common finding in malignant cells and has been explored as a therapeutic target for hypomethylating agents. When chemical bonds to DNA, the DNA becomes damaged and proper and complete replication cannot occur to make the normal intended cell. A DNA adduct is an abnormal piece of DNA covalently-bonded to a cancer-causing chemical. This has shown to be the start of a cancerous cell, or carcinogenesis. DNA adducts in scientific experiments are used as bio-markers and as such are themselves measured to reflect quantitatively, for comparison, the amount of cancer in the subject. 7-Methylguanosine is a substrate for purine-nucleoside phosphorylase and Eukaryotic translation initiation factor 4E. (PMID: 3506820 , 17044778 , 17264127 , 16799933 ).
Chemical FormulaC11H16N5O5
Average Mass298.2752 Da
Monoisotopic Mass298.11514 Da
IUPAC Name2-amino-9-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]-7-methyl-6-oxo-6,7-dihydro-3H-9lambda5-purin-9-ylium
Traditional Name2-amino-9-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]-7-methyl-6-oxo-3H-9lambda5-purin-9-ylium
CAS Registry Number20244-86-4
InChI Identifier
Spectrum TypeDescriptionDepositor IDDeposition DateView
2D NMR[1H, 13C]-HSQC NMR Spectrum (2D, 600 MHz, H2O, experimental)Wishart Lab2021-06-20View Spectrum
1D NMR1H NMR Spectrum (1D, 600 MHz, H2O, simulated)Varshavi.d262021-08-11View Spectrum
Species of Origin
Species NameSourceReference
Anas platyrhynchos
Anser anser
Bison bison
Bos taurus
Bos taurus X Bison bison
Bubalus bubalis
Camellia assamicaKNApSAcK Database
Camellia irrawadiensisiaKNApSAcK Database
Camellia kissiKNApSAcK Database
Camellia ptilophyllaKNApSAcK Database
Camellia sinensisKNApSAcK Database
Camellia taliensisKNApSAcK Database
Camellia toliensisKNApSAcK Database
Capra aegagrus hircus
Cervus canadensis
Citrus maximaKNApSAcK Database
Coffea arabicaKNApSAcK Database
Coffea canephoraKNApSAcK Database
Coffea dewevreiKNApSAcK Database
Coffea eugeniodesKNApSAcK Database
Coffea kianjavatensisKNApSAcK Database
Coffea libericaKNApSAcK Database
Coffea racemosaKNApSAcK Database
Coffea salvatrixKNApSAcK Database
Cola sp.KNApSAcK Database
Dromaius novaehollandiae
Equus caballus
Gallus gallus
Ilex paraguariensisKNApSAcK Database
Lagopus muta
Lepus timidus
Melanitta fusca
Meleagris gallopavo
Numida meleagris
Ovis aries
Paullinia cupanaKNApSAcK Database
Phasianus colchicus
Struthio camelus
Sus scrofa
Sus scrofa domestica
Theobroma cacaoKNApSAcK Database
Theobroma grandiflorumKNApSAcK Database
Chemical Taxonomy
Description Belongs to the class of organic compounds known as purine nucleosides. Purine nucleosides are compounds comprising a purine base attached to a ribosyl or deoxyribosyl moiety.
KingdomOrganic compounds
Super ClassNucleosides, nucleotides, and analogues
ClassPurine nucleosides
Sub ClassNot Available
Direct ParentPurine nucleosides
Alternative Parents
  • Purine nucleoside
  • Glycosyl compound
  • N-glycosyl compound
  • 6-oxopurine
  • Hypoxanthine
  • Pentose monosaccharide
  • Imidazopyrimidine
  • Purine
  • Aminopyrimidine
  • Pyrimidone
  • Monosaccharide
  • N-substituted imidazole
  • Pyrimidine
  • Azole
  • Imidazole
  • Heteroaromatic compound
  • Vinylogous amide
  • Tetrahydrofuran
  • Secondary alcohol
  • Organoheterocyclic compound
  • Oxacycle
  • Azacycle
  • Primary alcohol
  • Organic oxygen compound
  • Organonitrogen compound
  • Organooxygen compound
  • Amine
  • Alcohol
  • Hydrocarbon derivative
  • Organic oxide
  • Organopnictogen compound
  • Organic nitrogen compound
  • Primary amine
  • Organic cation
  • Aromatic heteropolycyclic compound
Molecular FrameworkAromatic heteropolycyclic compounds
External Descriptors
Physical Properties
Experimental Properties
Melting Point155 °CNot Available
Boiling PointNot AvailableNot Available
Water SolubilityNot AvailableNot Available
LogPNot AvailableNot Available
Predicted Properties
Water Solubility5.61 g/LALOGPS
pKa (Strongest Acidic)6.01ChemAxon
pKa (Strongest Basic)-3ChemAxon
Physiological Charge0ChemAxon
Hydrogen Acceptor Count8ChemAxon
Hydrogen Donor Count5ChemAxon
Polar Surface Area146.21 ŲChemAxon
Rotatable Bond Count2ChemAxon
Refractivity69.38 m³·mol⁻¹ChemAxon
Polarizability28.47 ųChemAxon
Number of Rings3ChemAxon
Rule of FiveYesChemAxon
Ghose FilterNoChemAxon
Veber's RuleNoChemAxon
MDDR-like RuleNoChemAxon
DrugBank IDDB03493
Phenol Explorer Compound IDNot Available
FoodDB IDFDB022428
KNApSAcK IDC00051958
Chemspider ID393054
KEGG Compound IDNot Available
BioCyc IDCPD0-1041
BiGG IDNot Available
Wikipedia Link7-Methylguanosine
PubChem Compound445404
PDB IDNot Available
ChEBI ID20794
Good Scents IDNot Available
General References
  1. Reynaud C, Bruno C, Boullanger P, Grange J, Barbesti S, Niveleau A: Monitoring of urinary excretion of modified nucleosides in cancer patients using a set of six monoclonal antibodies. Cancer Lett. 1992 Jan 31;61(3):255-62. [PubMed:1739950 ]
  2. Topp H, Sander G, Heller-Schoch G, Schoch G: Determination of 7-methylguanine, N2,N2-dimethylguanosine, and pseudouridine in ultrafiltrated serum of healthy adults by high-performance liquid chromatography. Anal Biochem. 1987 Feb 15;161(1):49-56. [PubMed:2437827 ]
  3. Tebib JG, Reynaud C, Cedoz JP, Letroublon MC, Niveleau A: Relationship between urinary excretion of modified nucleosides and rheumatoid arthritis process. Br J Rheumatol. 1997 Sep;36(9):990-5. [PubMed:9376997 ]
  4. Morris GS, Simmonds HA, Davies PM: Use of biological fluids for the rapid diagnosis of potentially lethal inherited disorders of human purine and pyrimidine metabolism. Biomed Chromatogr. 1986 Jun;1(3):109-18. [PubMed:3506820 ]
  5. Cho SH, Jung BH, Lee SH, Lee WY, Kong G, Chung BC: Direct determination of nucleosides in the urine of patients with breast cancer using column-switching liquid chromatography-tandem mass spectrometry. Biomed Chromatogr. 2006 Nov;20(11):1229-36. [PubMed:16799933 ]
  6. Yang TH, Hu ML: Intracellular levels of S-adenosylhomocysteine but not homocysteine are highly correlated to the expression of nm23-H1 and the level of 5-methyldeoxycytidine in human hepatoma cells with different invasion activities. Nutr Cancer. 2006;55(2):224-31. [PubMed:17044778 ]
  7. Liu Z, Liu S, Xie Z, Blum W, Perrotti D, Paschka P, Klisovic R, Byrd J, Chan KK, Marcucci G: Characterization of in vitro and in vivo hypomethylating effects of decitabine in acute myeloid leukemia by a rapid, specific and sensitive LC-MS/MS method. Nucleic Acids Res. 2007;35(5):e31. Epub 2007 Jan 30. [PubMed:17264127 ]