Record Information
Version1.0
Creation Date2016-09-30 22:27:34 UTC
Update Date2020-06-04 20:48:21 UTC
BMDB IDBMDB0000262
Secondary Accession Numbers
  • BMDB00262
Metabolite Identification
Common NameThymine
DescriptionThymine, also known as 5-methyluracil, belongs to the class of organic compounds known as hydroxypyrimidines. These are organic compounds containing a hydroxyl group attached to a pyrimidine ring. Pyrimidine is a 6-membered ring consisting of four carbon atoms and two nitrogen centers at the 1- and 3- ring positions. Thymine exists as a solid, possibly soluble (in water), and an extremely weak basic (essentially neutral) compound (based on its pKa) molecule. Thymine exists in all living species, ranging from bacteria to humans. Thymine is a potentially toxic compound. Thymine has been found to be associated with several diseases known as colorectal cancer, thymidine treatment, and temporomandibular joint disorder; also thymine has been linked to the inborn metabolic disorders including dihydropyrimidine dehydrogenase deficiency.
Structure
Thumb
Synonyms
ValueSource
2,4-Dihydroxy-5-methylpyrimidineChEBI
5-Methyl-2,4(1H,3H)-pyrimidinedioneChEBI
5-Methylpyrimidine-2,4(1H,3H)-dioneChEBI
5-MethyluracilChEBI
TChEBI
ThyChEBI
ThyminChEBI
4-Hydroxy-5-methylpyrimidin-2(1H)-oneHMDB
5-Methyl-1,2,3,4-tetrahydropyrimidine-2,4-dioneHMDB
5-Methyl-2,4-dihydroxypyrimidineHMDB
5-Methylpyrimidine-2,4-dioneHMDB
5 MethyluracilHMDB
Chemical FormulaC5H6N2O2
Average Molecular Weight126.1133
Monoisotopic Molecular Weight126.042927446
IUPAC Name5-methyl-1,2,3,4-tetrahydropyrimidine-2,4-dione
Traditional Namethymine
CAS Registry Number65-71-4
SMILES
CC1=CNC(=O)NC1=O
InChI Identifier
InChI=1S/C5H6N2O2/c1-3-2-6-5(9)7-4(3)8/h2H,1H3,(H2,6,7,8,9)
InChI KeyRWQNBRDOKXIBIV-UHFFFAOYSA-N
Chemical Taxonomy
Description belongs to the class of organic compounds known as hydroxypyrimidines. These are organic compounds containing a hydroxyl group attached to a pyrimidine ring. Pyrimidine is a 6-membered ring consisting of four carbon atoms and two nitrogen centers at the 1- and 3- ring positions.
KingdomOrganic compounds
Super ClassOrganoheterocyclic compounds
ClassDiazines
Sub ClassPyrimidines and pyrimidine derivatives
Direct ParentHydroxypyrimidines
Alternative Parents
Substituents
  • Hydroxypyrimidine
  • Heteroaromatic compound
  • Azacycle
  • Organic nitrogen compound
  • Organic oxygen compound
  • Organopnictogen compound
  • Hydrocarbon derivative
  • Organooxygen compound
  • Organonitrogen compound
  • Aromatic heteromonocyclic compound
Molecular FrameworkAromatic heteromonocyclic compounds
External Descriptors
Ontology
StatusDetected and Quantified
Origin
  • Endogenous
BiofunctionNot Available
ApplicationNot Available
Cellular locationsNot Available
Physical Properties
StateSolid
Experimental Properties
PropertyValueReference
Melting Point320 °CNot Available
Boiling PointNot AvailableNot Available
Water Solubility3.82 mg/mLYALKOWSKY,SH & DANNENFELSER,RM (1992)
LogP-0.62HANSCH,C ET AL. (1995)
Predicted Properties
PropertyValueSource
logP-0.99ALOGPS
logP-0.46ChemAxon
logS-1.1ALOGPS
pKa (Strongest Acidic)9.06ChemAxon
pKa (Strongest Basic)-5ChemAxon
Physiological Charge0ChemAxon
Hydrogen Acceptor Count2ChemAxon
Hydrogen Donor Count2ChemAxon
Polar Surface Area58.2 ŲChemAxon
Rotatable Bond Count0ChemAxon
Refractivity30.33 m³·mol⁻¹ChemAxon
Polarizability11.42 ųChemAxon
Number of Rings1ChemAxon
BioavailabilityYesChemAxon
Rule of FiveYesChemAxon
Ghose FilterYesChemAxon
Veber's RuleYesChemAxon
MDDR-like RuleYesChemAxon
Spectra
Spectra
Spectrum TypeDescriptionSplash Key
GC-MSGC-MS Spectrum - GC-EI-TOF (Pegasus III TOF-MS system, Leco; GC 6890, Agilent Technologies) (2 TMS)splash10-0bt9-0960000000-50722d1f64f22b69e207View in MoNA
GC-MSGC-MS Spectrum - GC-EI-TOF (Pegasus III TOF-MS system, Leco; GC 6890, Agilent Technologies) (Non-derivatized)splash10-0bta-0940000000-ff59d40c1a93e04954abView in MoNA
GC-MSGC-MS Spectrum - GC-EI-TOF (Pegasus III TOF-MS system, Leco; GC 6890, Agilent Technologies) (2 TMS)splash10-05fr-7940000000-a0ebb190eba32aceac56View in MoNA
GC-MSGC-MS Spectrum - GC-MS (2 TMS)splash10-0ab9-1980000000-5b95ad97f31d8176a0c6View in MoNA
GC-MSGC-MS Spectrum - EI-B (Non-derivatized)splash10-004i-9500000000-74b6d7909610070d30d0View in MoNA
GC-MSGC-MS Spectrum - GC-EI-TOF (Non-derivatized)splash10-0bt9-0960000000-50722d1f64f22b69e207View in MoNA
GC-MSGC-MS Spectrum - GC-EI-TOF (Non-derivatized)splash10-0bta-0940000000-ff59d40c1a93e04954abView in MoNA
GC-MSGC-MS Spectrum - GC-EI-TOF (Non-derivatized)splash10-05fr-7940000000-a0ebb190eba32aceac56View in MoNA
GC-MSGC-MS Spectrum - GC-MS (Non-derivatized)splash10-0ab9-1980000000-5b95ad97f31d8176a0c6View in MoNA
GC-MSGC-MS Spectrum - GC-EI-TOF (Non-derivatized)splash10-0bta-0930000000-a2d3bc738d3f9e60aeb7View in MoNA
Predicted GC-MSPredicted GC-MS Spectrum - GC-MS (Non-derivatized) - 70eV, Positivesplash10-004i-9500000000-33bb743c9a1a77fe4e47View in MoNA
Predicted GC-MSPredicted GC-MS Spectrum - GC-MS (Non-derivatized) - 70eV, PositiveNot AvailableView in JSpectraViewer
Predicted GC-MSPredicted GC-MS Spectrum - GC-MS (Non-derivatized) - 70eV, PositiveNot AvailableView in JSpectraViewer
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 10V, Negativesplash10-004i-9100000000-1e96fdb2525aace8b29dView in MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 20V, Negativesplash10-0a6r-9000000000-34edf89b8a99493ed897View in MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 30V, Negativesplash10-0a4i-9000000000-7d381bc0d559ed8150e9View in MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 40V, Negativesplash10-0a4i-9000000000-90f8edce6ae2b6f83347View in MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 50V, Negativesplash10-0a4l-9000000000-445d07aed275008cfe2dView in MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QTOF (UPLC Q-Tof Premier, Waters) , Negativesplash10-004i-0900000000-deb5e6830bc01a0c870eView in MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ , negativesplash10-004i-9100000000-1e96fdb2525aace8b29dView in MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ , negativesplash10-0a6r-9000000000-34edf89b8a99493ed897View in MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ , negativesplash10-0a4i-9000000000-fbf8dadffeee1dead341View in MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ , negativesplash10-0a4i-9000000000-0ee2bab9c37212ccf44eView in MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ , negativesplash10-0a4l-9000000000-599b8dcd618a9b96df4bView in MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QTOF , negativesplash10-004i-0900000000-deb5e6830bc01a0c870eView in MoNA
LC-MS/MSLC-MS/MS Spectrum - 40V, Negativesplash10-0006-9000000000-97236a7217f3f91298c3View in MoNA
LC-MS/MSLC-MS/MS Spectrum - 10V, Negativesplash10-0006-9200000000-5e679d49ba14eea7448eView in MoNA
LC-MS/MSLC-MS/MS Spectrum - 20V, Negativesplash10-0006-9000000000-90b5a25f7c3ef33245baView in MoNA
LC-MS/MSLC-MS/MS Spectrum - Quattro_QQQ 10V, Positive (Annotated)splash10-004i-0900000000-a3779faac812139c6333View in MoNA
LC-MS/MSLC-MS/MS Spectrum - Quattro_QQQ 25V, Positive (Annotated)splash10-004i-0900000000-a3779faac812139c6333View in MoNA
LC-MS/MSLC-MS/MS Spectrum - Quattro_QQQ 40V, Positive (Annotated)splash10-0udi-9200000000-0e7d9466530de47896d9View in MoNA
LC-MS/MSLC-MS/MS Spectrum - EI-B (HITACHI M-80) , Positivesplash10-004i-9400000000-7ff00d5a94e12e6e1701View in MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 10V, Positivesplash10-056r-8900000000-96370e30b48d3270abaaView in MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 20V, Positivesplash10-0bwc-9600000000-b988fb9252c409b19c33View in MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 30V, Positivesplash10-01q9-9100000000-8c82d68e9ec8594b1fffView in MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 40V, Positivesplash10-001i-9000000000-f69c5d963b845f8b3cfbView in MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 50V, Positivesplash10-0a4i-0900000000-3a9af2cf67d3f113fa7fView in MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QTOF (UPLC Q-Tof Premier, Waters) , Positivesplash10-004i-0900000000-97549ff58b84351d860cView in MoNA
MSMass Spectrum (Electron Ionization)splash10-056r-9400000000-5dd0bc0194a302d8ee95View in MoNA
1D NMR13C NMR Spectrum (1D, 125 MHz, H2O, experimental)Not AvailableView in JSpectraViewer
1D NMR1H NMR Spectrum (1D, 500 MHz, H2O, experimental)Not AvailableView in JSpectraViewer
1D NMR1H NMR Spectrum (1D, 400 MHz, DMSO-d6, experimental)Not AvailableView in JSpectraViewer
1D NMR13C NMR Spectrum (1D, 22.53 MHz, DMSO-d6, experimental)Not AvailableView in JSpectraViewer
1D NMR13C NMR Spectrum (1D, 100 MHz, D2O, predicted)Not AvailableView in JSpectraViewer
1D NMR1H NMR Spectrum (1D, 100 MHz, D2O, predicted)Not AvailableView in JSpectraViewer
1D NMR13C NMR Spectrum (1D, 200 MHz, D2O, predicted)Not AvailableView in JSpectraViewer
1D NMR1H NMR Spectrum (1D, 200 MHz, D2O, predicted)Not AvailableView in JSpectraViewer
1D NMR13C NMR Spectrum (1D, 300 MHz, D2O, predicted)Not AvailableView in JSpectraViewer
1D NMR1H NMR Spectrum (1D, 300 MHz, D2O, predicted)Not AvailableView in JSpectraViewer
1D NMR13C NMR Spectrum (1D, 400 MHz, D2O, predicted)Not AvailableView in JSpectraViewer
1D NMR1H NMR Spectrum (1D, 400 MHz, D2O, predicted)Not AvailableView in JSpectraViewer
1D NMR13C NMR Spectrum (1D, 500 MHz, D2O, predicted)Not AvailableView in JSpectraViewer
1D NMR1H NMR Spectrum (1D, 500 MHz, D2O, predicted)Not AvailableView in JSpectraViewer
1D NMR13C NMR Spectrum (1D, 600 MHz, D2O, predicted)Not AvailableView in JSpectraViewer
1D NMR1H NMR Spectrum (1D, 600 MHz, D2O, predicted)Not AvailableView in JSpectraViewer
1D NMR13C NMR Spectrum (1D, 700 MHz, D2O, predicted)Not AvailableView in JSpectraViewer
1D NMR1H NMR Spectrum (1D, 700 MHz, D2O, predicted)Not AvailableView in JSpectraViewer
1D NMR13C NMR Spectrum (1D, 800 MHz, D2O, predicted)Not AvailableView in JSpectraViewer
1D NMR1H NMR Spectrum (1D, 800 MHz, D2O, predicted)Not AvailableView in JSpectraViewer
1D NMR13C NMR Spectrum (1D, 900 MHz, D2O, predicted)Not AvailableView in JSpectraViewer
1D NMR1H NMR Spectrum (1D, 900 MHz, D2O, predicted)Not AvailableView in JSpectraViewer
1D NMR13C NMR Spectrum (1D, 1000 MHz, D2O, predicted)Not AvailableView in JSpectraViewer
1D NMR1H NMR Spectrum (1D, 1000 MHz, D2O, predicted)Not AvailableView in JSpectraViewer
1D NMR13C NMR Spectrum (1D, 400 MHz, H2O, experimental)Not AvailableView in JSpectraViewer
2D NMR[1H, 13C]-HSQC NMR Spectrum (2D, 400 MHz, H2O, experimental)Not AvailableView in JSpectraViewer
Biological Properties
Cellular LocationsNot Available
Biospecimen Locations
  • Epidermis
  • Fibroblasts
  • Liver
  • Mammary Gland
  • Milk
  • Placenta
  • Prostate Tissue
  • Ruminal Fluid
Pathways
Normal Concentrations
BiospecimenStatusValueAgeSexConditionReferenceDetails
EpidermisExpected but not QuantifiedNot QuantifiedNot SpecifiedNot SpecifiedNormal
  • Not Applicable
details
FibroblastsExpected but not QuantifiedNot QuantifiedNot SpecifiedNot SpecifiedNormal
  • Not Applicable
details
LiverDetected but not QuantifiedNot QuantifiedNot SpecifiedNot Specified
Normal
details
LiverDetected but not QuantifiedNot QuantifiedNot SpecifiedNot Specified
Normal
details
Mammary GlandDetected but not QuantifiedNot QuantifiedNot SpecifiedNot Specified
Normal
details
Mammary GlandDetected but not QuantifiedNot QuantifiedNot SpecifiedNot Specified
Normal
details
MilkDetected but not QuantifiedNot QuantifiedNot SpecifiedNot SpecifiedNormal details
PlacentaExpected but not QuantifiedNot QuantifiedNot SpecifiedNot SpecifiedNormal
  • Not Applicable
details
Prostate TissueExpected but not QuantifiedNot QuantifiedNot SpecifiedNot SpecifiedNormal
  • Not Applicable
details
Ruminal FluidDetected and Quantified188 +/- 45 uMNot SpecifiedNot Specified
Normal
    • Aidin Foroutan, C...
details
Ruminal FluidDetected but not QuantifiedNot QuantifiedNot SpecifiedNot Specified
Normal
details
Ruminal FluidDetected and Quantified26.3 uMNot SpecifiedNot Specified
Normal
details
Ruminal FluidDetected and Quantified30.1 uMNot SpecifiedNot Specified
Normal
details
Ruminal FluidDetected and Quantified30.2 uMNot SpecifiedNot Specified
Normal
details
Ruminal FluidDetected and Quantified39.7 uMNot SpecifiedNot Specified
Normal
details
Ruminal FluidDetected and Quantified27 +/- 12 uMNot SpecifiedNot Specified
Normal
    • Fozia Saleem, Sou...
details
Ruminal FluidDetected and Quantified30 +/- 14 uMNot SpecifiedNot Specified
Normal
    • Fozia Saleem, Sou...
details
Ruminal FluidDetected and Quantified35 +/- 30 uMNot SpecifiedNot Specified
Normal
    • Fozia Saleem, Sou...
details
Ruminal FluidDetected and Quantified40 +/- 23 uMNot SpecifiedNot Specified
Normal
    • Fozia Saleem, Sou...
details
Ruminal FluidDetected and Quantified40 +/- 23 uMNot SpecifiedNot Specified
Normal
    • Fozia Saleem, Sou...
details
Ruminal FluidDetected and Quantified39.78 +/- 46.65 uMNot SpecifiedNot SpecifiedNormal
    • Fozia Saleem, Sou...
details
Abnormal Concentrations
BiospecimenStatusValueAgeSexConditionReferenceDetails
Ruminal FluidDetected and Quantified30.27 +/- 29.58 uMNot SpecifiedNot SpecifiedRumen acidosis
    • Fozia Saleem, Sou...
details
HMDB IDHMDB0000262
DrugBank IDDB03462
Phenol Explorer Compound IDNot Available
FooDB IDFDB021922
KNApSAcK IDC00001511
Chemspider ID1103
KEGG Compound IDC00178
BioCyc IDTHYMINE
BiGG ID34151
Wikipedia LinkThymine
METLIN ID290
PubChem Compound1135
PDB IDNot Available
ChEBI ID17821
References
Synthesis ReferenceZhang, Shi-Ying; Wu, Da-Jun; Zhang, Yan-Ping. Synthesis of thymine. Zhongguo Yiyao Gongye Zazhi (1999), 30(7), 325.
Material Safety Data Sheet (MSDS)Not Available
General References
  1. Melzer N, Wittenburg D, Hartwig S, Jakubowski S, Kesting U, Willmitzer L, Lisec J, Reinsch N, Repsilber D: Investigating associations between milk metabolite profiles and milk traits of Holstein cows. J Dairy Sci. 2013 Mar;96(3):1521-34. doi: 10.3168/jds.2012-5743. [PubMed:23438684 ]
  2. Pan L, Yu J, Mi Z, Mo L, Jin H, Yao C, Ren D, Menghe B: A Metabolomics Approach Uncovers Differences between Traditional and Commercial Dairy Products in Buryatia (Russian Federation). Molecules. 2018 Mar 22;23(4). pii: molecules23040735. doi: 10.3390/molecules23040735. [PubMed:29565828 ]

Enzymes

General function:
Amino acid transport and metabolism
Specific function:
Involved in pyrimidine base degradation. Catalyzes the reduction of uracil and thymine.
Gene Name:
DPYD
Uniprot ID:
Q28007
Molecular weight:
111697.0
Reactions
Thymine + NADP → Dihydrothymine + NADPHdetails