Recombinant Human UDP-glucuronosyltransferase 2B10 (UGT2B10) is a protein-coding gene product that plays a crucial role in the metabolism of various drugs and endogenous compounds through glucuronidation. This enzyme belongs to the UDP-glucuronosyltransferase family, which is essential for conjugating glucuronic acid to lipophilic substances, thereby enhancing their solubility and facilitating their excretion from the body.
UGT2B10 is primarily involved in the N-glucuronidation of tertiary amines, including several drugs and endogenous compounds. It is located in the endoplasmic reticulum membrane and is an integral component of intracellular membrane-bounded organelles . The enzyme is mainly expressed in the liver, where it contributes to the detoxification of xenobiotics and endogenous substances.
UGT2B10 has been identified as a catalyst for the glucuronidation of various substrates, including:
Antidepressants and antipsychotics: Such as cyclobenzaprine, mirtazapine, and clozapine .
Tobacco-related nitrosamines: Highlighting its role in detoxifying carcinogenic compounds .
Recent studies have explored the role of UGT2B10 in drug metabolism, particularly in the context of hematopoietic stem cell transplantation (HSCT) and its potential involvement in sinusoidal occlusion syndrome (SOS) . Additionally, UGT2B10 has been implicated in the metabolism of lamotrigine, an anticonvulsant drug, alongside UGT1A4 .
| Substrate/Ligand | Binding Energy (ΔG) [kcal/mol] | Dissociation Constant (Kd) [mM] |
|---|---|---|
| Amitriptyline | -1.9 ± 0.2 | 39.0 |
| Itraconazole | 19.0 ± 0.5 | 1.1 × 10^17 |
| 4-hydroxy voriconazole | -1.0 ± 0.0 | 184.7 |
| Acetaminophen | -5.5 ± 0.0 | 0.1 |
| Cyclosporine A | 154.9 ± 2.9 | 1.8 × 10^118 |
| Bilirubine | 6.9 ± 0.0 | 1.2 × 10^15 |
| Dihydroxy voriconazole | -0.6 ± 0.0 | 363.0 |
| Hydroxy voriconazole | -1.2 ± 0.1 | 125.0 |
| Lorazepam | -2.6 ± 0.0 | 12.4 |
| Methotrexate | -0.5 ± 0.5 | 567.3 |
Genetic variants in the UGT2B10 gene have been associated with altered drug metabolism and may influence the risk of certain conditions, such as sinusoidal occlusion syndrome following HSCT . Additionally, UGT2B10 is linked to diseases like Crigler-Najjar Syndrome and Gilbert Syndrome, although its direct role in these conditions is less clear .