Sulfation biotransformation reaction (Homo sapiens)
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Description
Metabolism of xenobiotic compounds consists of phase I and a phase II biotransformation reactions, being compound modification and conjugation reactions respectively. In phase I biotransformation, the compound is modificated via oxidation, reduction, hydrolysis, or other minor reactions, to reveal a reactive group to which a conjugation molecule can react to. In phase II, a small conjugation molecule reacts with the phase I modified molecule, producing a much more water-soluble molecule that can be excreted more easily.
Sulfation is a phase II biotransformation reaction in which sulfate acts as a conjugation molecule and binds to a substrate via the catalysis of sulfotransferases. Sulfate is first combined with ATP molecules to form PAPS via the dual function enzymes PAPSS1 and PAPSS2 consisting of a sulfurylase domain and an APS kinase domain. From PAPS the sulfate group is transferred to the actual substrate via the action of sulfotransferases, resulting in a sulfated substrate and the sulfate-lacking PAP.
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Ontology Terms
Bibliography
- Gamage N, Barnett A, Hempel N, Duggleby RG, Windmill KF, Martin JL, McManus ME; ''Human sulfotransferases and their role in chemical metabolism.''; Toxicol Sci, 2006 PubMed Europe PMC Scholia
- Coughtrie MW, Johnston LE; ''Interactions between dietary chemicals and human sulfotransferases-molecular mechanisms and clinical significance.''; Drug Metab Dispos, 2001 PubMed Europe PMC Scholia
- Coughtrie MW; ''Sulfation through the looking glass--recent advances in sulfotransferase research for the curious.''; Pharmacogenomics J, 2002 PubMed Europe PMC Scholia
History
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External references
DataNodes
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Name | Type | Database reference | Comment |
---|---|---|---|
ADP | Metabolite | HMDB01341 (HMDB) | |
APS | Metabolite | HMDB01003 (HMDB) | |
ATP | Metabolite | HMDB00538 (HMDB) | |
G6PD | GeneProduct | ENSG00000160211 (Ensembl) | |
GPX | GeneProduct | ||
GSR | GeneProduct | ENSG00000104687 (Ensembl) | |
Glutathione (oxidized) | Metabolite | HMDB03337 (HMDB) | |
Glutathione (reduced) | Metabolite | HMDB00125 (HMDB) | |
NADP+ | Metabolite | HMDB00217 (HMDB) | |
NADPH | Metabolite | HMDB00221 (HMDB) | |
PAP | Metabolite | HMDB00061 (HMDB) | |
PAPS | Metabolite | HMDB01134 (HMDB) | |
PAPSS1 | GeneProduct | ENSG00000138801 (Ensembl) | |
PAPSS2 | GeneProduct | ENSG00000198682 (Ensembl) | |
PPi | Metabolite | ||
SULT1A1 | GeneProduct | ENSG00000196502 (Ensembl) | |
SULT1A2 | GeneProduct | ENSG00000197165 (Ensembl) | |
SULT1A3 | GeneProduct | ENSG00000213599 (Ensembl) | |
SULT1A4 | GeneProduct | ENSG00000213648 (Ensembl) | |
SULT1B1 | GeneProduct | ENSG00000173597 (Ensembl) | |
SULT1C1 | GeneProduct | ENSG00000198203 (Ensembl) | |
SULT1C2 | GeneProduct | ENSG00000198075 (Ensembl) | |
SULT1C3 | GeneProduct | ENSG00000196228 (Ensembl) | |
SULT1C4 | GeneProduct | 27233 (Entrez Gene) | |
SULT1E1 | GeneProduct | ENSG00000109193 (Ensembl) | |
SULT2A1 | GeneProduct | ENSG00000105398 (Ensembl) | |
SULT2B1 | GeneProduct | ENSG00000088002 (Ensembl) | |
SULT4A1 | GeneProduct | ENSG00000130540 (Ensembl) | |
SULT6B1 | GeneProduct | ENSG00000138068 (Ensembl) | |
Substrate | Metabolite | ||
Substrate sulfate | Metabolite | ||
Sulfate | Metabolite | HMDB01448 (HMDB) | |
Sulfotransferase | GeneProduct |
Annotated Interactions
No annotated interactions