RDH11 Inhibitors

Chemical inhibitors of RDH11 include a variety of compounds that interact with the protein in specific ways to reduce its enzymatic activity. Citral, which structurally resembles retinal, can also act as a competitive inhibitor, binding to the active site of RDH11 and impeding its normal function. Stannous Chloride inhibits RDH11 through a different mechanism, by interacting with sulfhydryl groups within the protein that are essential for its catalytic action, while Disulfiram inactivates RDH11 by binding irreversibly to copper ions within the enzyme's active site, which are crucial for the catalysis of retinol oxidation.

Further, N-Ethylmaleimide and Iodoacetamide achieve inhibition of RDH11 through the modification of thiol groups in the enzyme. These thiol groups are necessary for the catalytic activity of RDH11, and their modification by these chemicals results in the inhibition of the protein's function. Another compound, Methotrexate, indirectly inhibits RDH11 by reducing the availability of intracellular tetrahydrofolate, a molecule required for the regeneration of NADPH. Since NADPH is a cofactor for RDH11, its depletion results in decreased activity of the enzyme. Ebselen acts as an inhibitor of RDH11 by mimicking glutathione peroxidase activity and binding to the enzyme's cysteine residues, which are potentially critical for enzymatic function. Ellagic Acid and Flufenamic Acid inhibit RDH11 by binding to the enzyme, potentially altering its conformation or active site, thus blocking its ability to convert retinol to retinal. Tannic Acid provides a non-specific inhibition of RDH11 by precipitating proteins, which includes limiting RDH11's access to its substrate or altering its active site.