3-Hydroxy-9,10-secoandrosta-1,3,5(10)-triene-9,17-dione monooxygenase

3-hydroxy-9,10-secoandrosta-1,3,5(10)-triene-9,17-dione monooxygenase (EC 1.14.14.12, HsaA) is an enzyme with systematic name 3-hydroxy-9,10-secoandrosta-1,3,5(10)-triene-9,17-dione,FMNH2:oxygen oxidoreductase.

[1] This enzyme catalyses the following chemical reaction: This bacterial enzyme participates in the degradation of several steroids, including cholesterol and testosterone.