Involved in indole glucosinolate biosynthesis. Catalyzes hydroxylation reactions of the glucosinolate indole ring. Converts indol-3-yl-methylglucosinolate (I3M) to 1-hydroxy-indol-3-yl-methylglucosinolate (1OH-I3M) intermediate. This hydroxy intermediates is converted to 1-methoxy-indol-3-yl-methylglucosinolate (1MO-I3M) by indole glucosinolate methyltransferase 1 and 2 (IGMT1 and IGMT2). Secondary metabolite biosynthesis. Belongs to the cytochrome P450 family.