The alignment model represents the N-terminal rieske iron-sulfur domain of KshA, the oxygenase component of 3-ketosteroid 9-alpha-hydroxylase (KSH). The terminal oxygenase component of KSH is a key enzyme in the microbial steroid degradation pathway, catalyzing the 9 alpha-hydroxylation of 4-androstene-3,17-dione (AD) and 1,4-androstadiene-3,17-dione (ADD). KSH is a two-component class IA monooxygenase, with terminal oxygenase (KshA) and oxygenase reductase (KshB) components. KSH activity has been found in many actino- and proteo- bacterial genera including Rhodococcus, Nocardia, Arthrobacter, Mycobacterium, and Burkholderia.
Jiyao W et al.(2023). "The conserved domain database in 2023.",