2.3.1.167 metabolism 10-deacetylbaccatin III-10-O-acetyl transferase functions in the last step of Taxol core synthesis is the most important enzyme of the pathway -, 719235 2.3.1.167 metabolism key enzyme to produce baccatin III, a key precursor in paclitaxel synthesis 757642 2.3.1.167 metabolism the enzyme is involved in taxol biosynthesis 757640 2.3.1.167 metabolism the relationship between taxane patterns and the expression of genes encoding the enzymes taxadiene synthase, 10-deacetylbaccatin III-10beta-O-acetyltransferase, baccatin III 13-O-(3-amino-3-phenylpropanoyl) transferase and 3'-N-debenzoyl-2'-deoxytaxol-N-benzoyltransferase, involved in early and late steps of the taxane pathway, overview. The most abundant taxane in the aerial parts is 10-deacetylbaccatin III, which increases as the plantlets grow, indicating a low conversion to baccatin III and taxol. In contrast, the levels of 10-deacetylbaccatin III in the roots remain lower than those of taxol. But in the aerial parts the expression of DBAT, which codes for the enzyme that converts 10-deacetylbaccatin III into baccatin III, does not increase with the age of plantlets, unlike that of the other three enzymes, suggesting that this gene controls a rate-limiting step in the taxane biosynthetic pathway 720764