Enzymes
| UniProtKB help_outline | 8 proteins |
Reaction participants Show >> << Hide
- Name help_outline losartan Identifier CHEBI:149504 Charge -1 Formula C22H22ClN6O InChIKeyhelp_outline MDMTUGIZSFHDIC-UHFFFAOYSA-N SMILEShelp_outline C1=CC(CN2C(=NC(=C2CO)Cl)CCCC)=CC=C1C3=CC=CC=C3C=4[N-]N=NN4 2D coordinates Mol file for the small molecule Search links Involved in 2 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 losartan-2-N-β-D-glucuronide Identifier CHEBI:149507 Charge -1 Formula C28H30ClN6O7 InChIKeyhelp_outline NGFMQMUIOUSHGR-RTCYWULBSA-M SMILEShelp_outline C1=CC(CN2C(=NC(=C2CO)Cl)CCCC)=CC=C1C3=CC=CC=C3C4=NN(N=N4)[C@H]5[C@@H]([C@H]([C@@H]([C@H](O5)C([O-])=O)O)O)O 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
Cross-references
| RHEA:63720 | RHEA:63721 | RHEA:63722 | RHEA:63723 | |
|---|---|---|---|---|
| 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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The human UDP-glucuronosyltransferase UGT1A3 is highly selective towards N2 in the tetrazole ring of losartan, candesartan, and zolarsartan.
Alonen A., Finel M., Kostiainen R.
Losartan, candesartan, and zolarsartan are AT(1) receptor antagonists that inhibit the effect of angiotensin II. We have examined their glucuronidation by liver microsomes from several animals and by recombinant human UDP-glucuronosyltransferases (UGTs). Large differences in the production of diff ... >> More
Losartan, candesartan, and zolarsartan are AT(1) receptor antagonists that inhibit the effect of angiotensin II. We have examined their glucuronidation by liver microsomes from several animals and by recombinant human UDP-glucuronosyltransferases (UGTs). Large differences in the production of different glucuronide regioisomers of the three sartans were observed among liver microsomes from human (HLM), rabbit, rat, pig, moose, and bovine. However, all the liver microsomes produced one or two N-glucuronides in which either N1 or N2 of the tetrazole ring were conjugated. O-Glucuronides were also detected, including acyl glucuronides of zolarsartan and candesartan. Examination of individual human UGTs of subfamilies 1A and 2B revealed that N-glucuronidation activity is widespread, along with variable regioselectivity with respect to the tetrazole nitrogens of these sartans. Interestingly, UGT1A3 exhibited a strong regioselectivity towards the N2 position of the tetrazole ring in all three sartans. Moreover, the tetrazole-N2 of zolarsartan was only conjugated by UGT1A3, whereas the tetrazole-N1 of this aglycone was accessible to other enzymes, including UGT1A5. Zolarsartan O-glucuronide was mainly produced by UGTs 1A10 and 2B7. UGT2B7, alongside UGT1A3, glucuronidated candesartan at the tetrazole-N2 position, whereas UGTs 1A7-1A10 mainly yielded candesartan O-glucuronide. In the case of losartan, no O-glucuronide was generated by any tested human enzyme. Nevertheless, UGTs 1A1, 1A3, 1A10, 2B7, and 2B17 glucuronidated losartan at the tetrazole-N2, while UGT1A10 also yielded the respective N1-glucuronide. Kinetic analyses revealed that the main contributors to losartan glucuronidation in HLM are UGT1A1 and UGT2B7. The results provide ample new data on substrate specificity in drug glucuronidation. << Less
Biochem. Pharmacol. 76:763-772(2008) [PubMed] [EuropePMC]
This publication is cited by 6 other entries.