Biology:Tetrahydroberberine oxidase
| tetrahydroberberine oxidase | |||||||||
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| Identifiers | |||||||||
| EC number | 1.3.3.8 | ||||||||
| CAS number | 114705-00-9 | ||||||||
| Databases | |||||||||
| IntEnz | IntEnz view | ||||||||
| BRENDA | BRENDA entry | ||||||||
| ExPASy | NiceZyme view | ||||||||
| KEGG | KEGG entry | ||||||||
| MetaCyc | metabolic pathway | ||||||||
| PRIAM | profile | ||||||||
| PDB structures | RCSB PDB PDBe PDBsum | ||||||||
| Gene Ontology | AmiGO / QuickGO | ||||||||
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(S)-Tetrahydroberberine oxidase (EC 1.3.3.8) is an enzyme that catalyzes the final transformation in the biosynthesis of berberine, a quaternary benzylisoquinoline alkaloid of the protoberberine structural subgroup.[1][2] This reaction pathway catalyzes the four-electron oxidation of (S)-tetrahydroberberine (also known as (S)-canadine) in the presence of oxygen to produce berberine and hydrogen peroxide as products.
(S)-Tetrahydroberberine + 2 O2 ⇌ Berberine + 2 H2O2
This enzyme belongs to the family known as oxidoreductases, in this instance the CH-CH moiety acts as the electron donor with oxygen acting as the electron acceptor. The systematic name of this enzyme is (S)-tetrahydroberberine:oxygen oxidoreductase; but it is also known as (S)-THB oxidase, tetrahydroberberine oxidase, and decreasingly, as (S)-tetrahydroprotoberberine oxidase.[3][4]
References
- ↑ "Purification and properties of (S)-tetrahydroprotoberberine oxidase from suspension-cultured cells of Berberis wilsoniae". European Journal of Biochemistry 175 (1): 17–25. July 1988. doi:10.1111/j.1432-1033.1988.tb14160.x. PMID 3402447.
- ↑ "(S)-tetrahydroprotoberberine oxidase the final enzyme in protoberberine biosynthesis". Tetrahedron Lett 25 (9): 953–4. 1984. doi:10.1016/S0040-4039(01)80071-X.
- ↑ "Purification and characterization of (S)-tetrahydroberberine oxidase from cultured Coptis japonica cells". Phytochemistry 27 (4): 979–82. 1988. doi:10.1016/0031-9422(88)80255-3.
- ↑ "Isolation, sequence, and bacterial expression of a cDNA for (S)-tetrahydroberberine oxidase from cultured berberine-producing Coptis japonica cells". Proceedings of the National Academy of Sciences of the United States of America 86 (2): 534–8. January 1989. doi:10.1073/pnas.86.2.534. PMID 2463630. Bibcode: 1989PNAS...86..534O.
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