Has the capacity to hydroxylate certain steroids in the 15-beta position. Also hydroxylates progesterone in the 11-alpha and 9-beta position. 2 H(+) + O2 + progesterone + reduced 2[4Fe-4S]-[ferredoxin] = 15beta-hydroxyprogesterone + H2O + oxidized 2[4Fe-4S]-[ferredoxin] With deoxycorticosterone as substrate only 15-beta hydroxylation is observed. Belongs to the cytochrome P450 family.