3alpha,7alpha,24(S)-trihydroxy-5beta-cholestan-27-al, NADPH + H+, and O2 react to form 3alpha,7alpha,24(S)-trihydroxy-5beta-cholestanoate (3,7,24THCA), NADP+, and H2O. This oxidation reaction occurs in the mitochondrial matrix, catalyzed by CYP27A1.
Pikuleva, IA, Bjorkhem, I, Waterman, MR, Babiker, A
Cali, JJ, Russell, DW
steroid hydroxylase activity of CYP27A1 [mitochondrial matrix]
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