RDH10 Inhibitors

Chemical inhibitors of RDH10 can exert their inhibitory effects through various molecular interactions that directly disrupt the protein's enzymatic function. Citral, an aldehyde, can form a Schiff base adduct with the alcohol group of RDH10, impeding its catalytic activity by directly modifying the enzyme's active site. Similarly, 4-Dimethylaminobenzaldehyde can inhibit RDH10 by also forming a Schiff base at the active site, thereby obstructing the conversion process of retinol to retinal. N-Ethylmaleimide has the capacity to irreversibly modify RDH10's cysteine residues, which are essential for the enzyme's catalytic action, resulting in a sustained inhibition. Disulfiram targets RDH10 by binding to the copper ion in the enzyme's active site, a critical component for RDH10's function, and thus inhibits the protein's activity.

Iodoacetamide acts on RDH10 by alkylating its thiol groups, leading to irreversible inhibition of its enzymatic function. Quercetin, through its ability to bind to the active site of RDH10, can block the enzyme's access to its natural substrate, retinol, effectively inhibiting its function. Emodin interferes with RDH10's activity by intercalating in the active site and possibly altering the enzyme's conformation, which is necessary for retinol binding. Phloretin competes with retinol for the active site of RDH10, thus acting as a competitive inhibitor and preventing the enzyme from catalyzing its substrate. Capsaicin binds to the same site and acts in a similar fashion as a competitive inhibitor, blocking RDH10's function. Fomepizole directly competes with retinol at RDH10's alcohol substrate site, effectively inhibiting the oxidation of retinol. Lastly, Isotretinoin, by binding to RDH10's active site, also acts as a competitive inhibitor, obstructing the normal processing of retinol and thereby inhibiting the activity of RDH10.