Enzymes
| UniProtKB help_outline | 1 proteins |
Reaction participants Show >> << Hide
- Name help_outline 16α-hydroxyestrone Identifier CHEBI:776 (Beilstein: 3214335; CAS: 566-76-7) help_outline Charge 0 Formula C18H22O3 InChIKeyhelp_outline WPOCIZJTELRQMF-QFXBJFAPSA-N SMILEShelp_outline [H][C@@]12C[C@@H](O)C(=O)[C@@]1(C)CC[C@]1([H])C3=C(CC[C@@]21[H])C=C(O)C=C3 2D coordinates Mol file for the small molecule Search links Involved in 3 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline UDP-α-D-glucuronate Identifier CHEBI:58052 Charge -3 Formula C15H19N2O18P2 InChIKeyhelp_outline HDYANYHVCAPMJV-LXQIFKJMSA-K SMILEShelp_outline O[C@@H]1[C@@H](COP([O-])(=O)OP([O-])(=O)O[C@H]2O[C@@H]([C@@H](O)[C@H](O)[C@H]2O)C([O-])=O)O[C@H]([C@@H]1O)n1ccc(=O)[nH]c1=O 2D coordinates Mol file for the small molecule Search links Involved in 107 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline 16α-hydroxyestrone 3-O-(β-D-glucuronate) Identifier CHEBI:136635 Charge -1 Formula C24H29O9 InChIKeyhelp_outline LUVBXKQCOJYEJY-OWYKRJLGSA-M SMILEShelp_outline C1[C@]2([C@]3([C@@](C4=C(CC3)C=C(C=C4)O[C@@H]5O[C@@H]([C@H]([C@@H]([C@H]5O)O)O)C([O-])=O)(CC[C@@]2(C(=O)[C@@H]1O)C)[H])[H])[H] 2D coordinates Mol file for the small molecule Search links Involved in 1 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline UDP Identifier CHEBI:58223 Charge -3 Formula C9H11N2O12P2 InChIKeyhelp_outline XCCTYIAWTASOJW-XVFCMESISA-K SMILEShelp_outline O[C@@H]1[C@@H](COP([O-])(=O)OP([O-])([O-])=O)O[C@H]([C@@H]1O)n1ccc(=O)[nH]c1=O 2D coordinates Mol file for the small molecule Search links Involved in 577 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline H+ Identifier CHEBI:15378 Charge 1 Formula H InChIKeyhelp_outline GPRLSGONYQIRFK-UHFFFAOYSA-N SMILEShelp_outline [H+] 2D coordinates Mol file for the small molecule Search links Involved in 9,521 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
Cross-references
| RHEA:52448 | RHEA:52449 | RHEA:52450 | RHEA:52451 | |
|---|---|---|---|---|
| Reaction direction help_outline | undefined | left-to-right | right-to-left | bidirectional |
| UniProtKB help_outline |
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Related reactions help_outline
More general form(s) of this reaction
Publications
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Glucuronidation of estrone and 16alpha-hydroxyestrone by human UGT enzymes: The key roles of UGT1A10 and UGT2B7.
Kallionpaeae R.A., Jaervinen E., Finel M.
The glucuronidation of estrone and 16α-hydroxyestrone by recombinant human UDP-glucuronosyltransferase enzymes (UGTs) of subfamilies 1A, 2A and 2B was studied. Microsomes from human liver and small intestine were also tested for the glucuronidation of these two estrogens. The results revealed that ... >> More
The glucuronidation of estrone and 16α-hydroxyestrone by recombinant human UDP-glucuronosyltransferase enzymes (UGTs) of subfamilies 1A, 2A and 2B was studied. Microsomes from human liver and small intestine were also tested for the glucuronidation of these two estrogens. The results revealed that UGT1A10 is by far the most active enzyme in estrone glucuronidation. UGT1A10 also exhibited high rate of 16α-hydroxyestrone conjugation at the 3-OH, whereas UGT2B7 catalyzed its glucuronidation at high rates at the 16-OH. Human liver microsomes exhibited high rates of 16α-hydroxyestrone-16-glucuronide formation, but very low formation rates of either 16α-hydroxyestrone-3-glucuronide or estrone glucuronide. On the other hand, human intestine microsomes catalyzed the formation of all these 3 different glucuronides at high rates. Kinetic analyses revealed very low Km value for 16α-hydroxyestrone glucuronidation by UGT2B7, below 4 μM, suggesting higher affinity than commonly found among UGTs and their substrates. In further studies with UGT1A10, mutant F93G exhibited increased glucuronidation rates of 16α-hydroxyestrone, but not estrone, whereas mutations in F90 did not reveal any activity with either estrogen. Taken together, the results of this study significantly expand our understanding on the metabolism of estrogens and their interactions with the human UGTs. << Less
J. Steroid Biochem. Mol. Biol. 154:104-111(2015) [PubMed] [EuropePMC]
This publication is cited by 2 other entries.