Reactome: A Curated Pathway Database

Purine metabolism

Stable Identifier
Homo sapiens
Locations in the PathwayBrowser

The events of human purine metabolism are conveniently, if somewhat arbitrarily, grouped into four pathways: de novo synthesis of inosine 5'-monophosphate (IMP), the biosynthesis of other purine ribo- and deoxyribonucleotides, purine salvage reactions, and purine catabolism (Watts 1974).

De novo synthesis of inosine 5'-monophosphate (IMP). The purine ribonucleotide IMP is assembled on 5-phospho-alpha-D-ribose 1-diphosphate (PRPP).

Purine biosynthesis [interconversion]. Purine ribo- and deoxyribonucleotide di- and triphosphates are synthesized, both from IMP and from guanosine and adenosine ribo- and deoxyribonucleotide monophosphates generated in salvage reactions.

Purine salvage reactions. Purine nucleosides and free bases generated by DNA and RNA breakdown are converted to nucleotide monophosphates.

Purine catabolism. The purine bases guanine and hypoxanthine are degraded to uric acid, which is excreted from the body.

Literature References
PubMed ID Title Journal Year
4620886 Molecular variation in relation to purine metabolism J Clin Pathol Suppl (R Coll Pathol) 1974
Participant Of
Orthologous Events