The COLAER_02088 Protein, acting as a 7beta-hydroxysteroid dehydrogenase, transforms 7-oxo-lithocholate into chemopreventive UDCA in the human colon, showcasing its role in bile acid metabolism. This enzyme also exhibits reversible reactions, oxidizing UDCA and utilizing NADPH as its preferred electron acceptor, influencing bile acid dynamics and potential therapeutic applications. COLAER_02088 Protein, Collinsella aerofaciens (T189V, V207M, GST) is the recombinant COLAER_02088 protein, expressed by E. coli , with N-GST labeled tag.