In enzymology, a 3alpha,7alpha,12alpha-trihydroxy-5beta-cholestanoyl-CoA 24-hydroxylase () is an enzyme that catalyzes the chemical reaction
The 3 substrates of this enzyme are (25R)-3alpha,7alpha,12alpha-trihydroxy-5beta-cholestan-26-oyl-CoA, H<sub>2</sub>O, and acceptor, whereas its two products are (24R,25R)-3alpha,7alpha,12alpha,24-tetrahydroxy-5beta-cholestan-26-oyl-CoA, and reduced acceptor.
This enzyme belongs to the family of oxidoreductases, specifically those acting on CH or CH<sub>2</sub> groups with other acceptors. The systematic name of this enzyme class is (25R)-3alpha,7alpha,12alpha-trihydroxy-5beta-cholestan-26-oyl-CoA:ac ceptor 24-oxidoreductase (24R-hydroxylating). Other names in common use include trihydroxycoprostanoyl-CoA oxidase, THC-CoA oxidase, THCA-CoA oxidase, 3alpha,7alpha,12alpha-trihydroxy-5beta-cholestanoyl-CoA oxidase, 3alpha,7alpha,12alpha-trihydroxy-5beta-cholestan-26-oate 24-hydroxylase. This enzyme participates in the ppar signaling pathway.