Taxoid 7beta-hydroxylase () is an enzyme with systematic name taxusin,NADPH:oxygen 7-oxidoreductase. This enzyme catalyses the following chemical reaction
The three substrates of this enzyme are taxusin, oxygen, and a proton. It uses a reduced nicotinamide adenine dinucleotide (NADH) cofactor bound to a heme in cytochrome P450 to give 7ò-hydroxytaxusin and water as products.
The enzyme is found in the yew tree Taxus cuspidata and is part of the pathway for the biosynthesis of taxol.