Taxane 13alpha-hydroxylase

From Wikipedia, the free encyclopedia

In enzymology, a taxane 13alpha-hydroxylase (EC 1.14.13.77) is an enzyme that catalyzes the chemical reaction

taxa-4(20),11-dien-5alpha-ol + NADPH + H⁺ + O₂ $\rightleftharpoons$ taxa-4(20),11-dien-5alpha,13alpha-diol + NADP⁺ + H₂O

The 4 substrates of this enzyme are taxa-4(20),11-dien-5alpha-ol, NADPH, H⁺, and O₂, whereas its 3 products are taxa-4(20),11-dien-5alpha,13alpha-diol, NADP⁺, and H₂O.

This enzyme belongs to the family of oxidoreductases, specifically those acting on paired donors, with O2 as oxidant and incorporation or reduction of oxygen. The oxygen incorporated need not be derived from O2 with NADH or NADPH as one donor, and incorporation of one atom o oxygen into the other donor. The systematic name of this enzyme class is taxa-4(20),11-dien-5alpha-ol,NADPH:oxygen oxidoreductase (13alpha-hydroxylating). This enzyme participates in diterpenoid biosynthesis.

[edit] References

IUBMB entry for 1.14.13.77
BRENDA references for 1.14.13.77 (Recommended.)
PubMed references for 1.14.13.77
PubMed Central references for 1.14.13.77
Google Scholar references for 1.14.13.77
Wheeler AL, Long RM, Ketchum RE, Rithner CD, Williams RM, Croteau R (2001). "Taxol biosynthesis: differential transformations of taxadien-5 alpha-ol and its acetate ester by cytochrome P450 hydroxylases from Taxus suspension cells". Arch. Biochem. Biophys. 390: 265–78. doi:10.1006/abbi.2001.2377. PMID 11396929.
Jennewein S, Rithner CD, Williams RM, Croteau RB (2001). "Taxol biosynthesis: taxane 13 alpha-hydroxylase is a cytochrome P450-dependent monooxygenase". Proc. Natl. Acad. Sci. U. S. A. 98: 13595–600. doi:10.1073/pnas.251539398. PMID 11707604.