Record Information
Version1.0
StatusDetected and Quantified
Creation Date2021-05-15 06:44:01 UTC
Update Date2024-04-30 19:35:01 UTC
Metabolite IDMMDBc0016011
Metabolite Identification
Common NameThioguanine
DescriptionThioguanine is only found in individuals that have used or taken this drug. It is an antineoplastic compound which also has antimetabolite action. The drug is used in the therapy of acute leukemia. [PubChem]Thioguanine competes with hypoxanthine and guanine for the enzyme hypoxanthine-guanine phosphoribosyltransferase (HGPRTase) and is itself converted to 6-thioguanilyic acid (TGMP), which reaches high intracellular concentrations at therapeutic doses. TGMP interferes with the synthesis of guanine nucleotides by its inhibition of purine biosynthesis by pseudofeedback inhibition of glutamine-5-phosphoribosylpyrophosphate amidotransferase, the first enzyme unique to the de novo pathway of purine ribonucleotide synthesis. TGMP also inhibits the conversion of inosinic acid (IMP) to xanthylic acid (XMP) by competition for the enzyme IMP dehydrogenase. Thioguanine nucleotides are incorporated into both the DNA and the RNA by phosphodiester linkages, and some studies have shown that incorporation of such false bases contributes to the cytotoxicity of thioguanine. Its tumor inhibitory properties may be due to one or more of its effects on feedback inhibition of de novo purine synthesis; inhibition of purine nucleotide interconversions; or incorporation into the DNA and RNA. The overall result of its action is a sequential blockade of the utilization and synthesis of the purine nucleotides.
Structure
Synonyms
ValueSource
2-Amino 6MPChEBI
2-Amino-1,7-dihydro-6H-purine-6-thioneChEBI
2-Amino-1,9-dihydropurine-6-thioneChEBI
2-Amino-6-mercaptopurineChEBI
2-Amino-6-merkaptopurinChEBI
2-Amino-6-purinethiolChEBI
2-Aminopurin-6-thiolChEBI
2-Aminopurine-6(1H)-thioneChEBI
2-Aminopurine-6-thiolChEBI
6-Mercapto-2-aminopurineChEBI
6-MercaptoguanineChEBI
6-TGChEBI
6-ThioguanineChEBI
TGChEBI
ThGChEBI
TioguaninChEBI
TioguaninaChEBI
TioguaninumChEBI
LanvisKegg
6 ThioguanineHMDB
Glaxo wellcome brand OF thioguanineHMDB
GlaxoSmithKline brand OF thioguanineHMDB
ThioguaninGSKHMDB
Thioguanine hemihydrateHMDB
Tioguanina wellcomeHMDB
Wellcome brand OF thioguanineHMDB
2 Amino 6 purinethiolHMDB
GlaxoSmithKline brand OF tioguanineHMDB
Thioguanine tabloidHMDB
Glaxo wellcome brand OF tioguanineHMDB
TabloidHMDB
Thioguanine anhydrousHMDB
Anhydrous, thioguanineHMDB
Thioguanin GSKHMDB
Thioguanin-GSKHMDB
Thioguanine monosodium saltHMDB
Tioguanine glaxosmithkline brandHMDB
ThioguanineChEBI
Molecular FormulaC5H5N5S
Average Mass167.192
Monoisotopic Mass167.026565875
IUPAC Name2-amino-6,7-dihydro-3H-purine-6-thione
Traditional Namethioguanine
CAS Registry NumberNot Available
SMILES
NC1=NC(=S)C2=C(N1)N=CN2
InChI Identifier
InChI=1S/C5H5N5S/c6-5-9-3-2(4(11)10-5)7-1-8-3/h1H,(H4,6,7,8,9,10,11)
InChI KeyWYWHKKSPHMUBEB-UHFFFAOYSA-N