RESUMEN
The enzyme 17beta-hydroxysteroid dehydrogenase type 10 (HSD10), also known as amyloid beta-peptide-binding alcohol dehydrogenase (ABAD), has been implicated in the development of Alzheimer's disease. This protein, a member of the short-chain dehydrogenase/reductase family of enzymes, has been shown to bind beta-amyloid and to participate in beta-amyloid neurotoxicity. We have determined the crystal structure of human ABAD/HSD10 complexed with NAD(+) and an inhibitory small molecule. The inhibitor occupies the substrate-binding site and forms a covalent adduct with the NAD(+) cofactor. The crystal structure provides a basis for the design of potent, highly specific ABAD/HSD10 inhibitors with potential application in the treatment of Alzheimer's disease.
Asunto(s)
3-Hidroxiacil-CoA Deshidrogenasas/antagonistas & inhibidores , 3-Hidroxiacil-CoA Deshidrogenasas/química , Enfermedad de Alzheimer/tratamiento farmacológico , Enfermedad de Alzheimer/enzimología , 3-Hidroxiacil-CoA Deshidrogenasas/genética , 3-Hidroxiacil-CoA Deshidrogenasas/metabolismo , Secuencia de Aminoácidos , Péptidos beta-Amiloides/metabolismo , Secuencia de Bases , Dominio Catalítico , Cristalografía por Rayos X , ADN Complementario/genética , Diseño de Fármacos , Inhibidores Enzimáticos/química , Inhibidores Enzimáticos/farmacología , Humanos , Técnicas In Vitro , Cinética , Modelos Moleculares , Datos de Secuencia Molecular , Mutagénesis Sitio-Dirigida , NAD/química , Conformación Proteica , Estructura Cuaternaria de Proteína , Proteínas Recombinantes/antagonistas & inhibidores , Proteínas Recombinantes/química , Proteínas Recombinantes/genética , Proteínas Recombinantes/metabolismo , Homología de Secuencia de AminoácidoRESUMEN
The structure-based design, chemical synthesis, and biological evaluation of novel MTAP substrates are described. These compounds incorporate various C5'-moieties and are shown to have different k(cat)/K(m) values compared with the natural MTAP substrate (MTA).