The CERT antagonist HPA-12: First practical synthesis and individual binding evaluation of the four stereoisomers

• Published in: Bioorganic & medicinal chemistry Vol. 23; no. 9; pp. 2004 - 2009
• Main Authors: Santos, Cécile, Fleury, Laurence, Rodriguez, Frédéric, Markus, Jozef, Berkeš, Dušan, Daïch, Adam, Ausseil, Frédéric, Baudoin-Dehoux, Cécile, Ballereau, Stéphanie, Génisson, Yves
• Format: Journal Article
• Language: English
• Published: OXFORD Elsevier Ltd 01.05.2015; Elsevier
• Subjects: Amides - chemical synthesis; Amides - chemistry; Amides - pharmacology; Binding Sites - drug effects; Biochemistry & Molecular Biology; CERT; Chemical Sciences; Chemistry; Chemistry, Medicinal; Chemistry, Organic; CIAT; Dose-Response Relationship, Drug; HPA-12; Humans; Life Sciences & Biomedicine; Models, Molecular; Molecular Conformation; Pharmacology & Pharmacy; Physical Sciences; Protein-Serine-Threonine Kinases - antagonists & inhibitors; Science & Technology; Sphingolipid; Stereoisomerism; Structure-Activity Relationship; TR-FRET; Sphingolipid; CERT; CIAT; TR-FRET; HPA-12; ASYMMETRIC-SYNTHESIS; STRUCTURAL BASIS; AMINO-ACIDS; ENDOPLASMIC-RETICULUM; NONVESICULAR TRAFFICKING; TRAFFICKING INHIBITOR HPA-12; CERAMIDE TRANSFER PROTEIN
• ISSN: 0968-0896; 1464-3391
• DOI: 10.1016/j.bmc.2015.03.019

[Display omitted] The first unified synthetic route to the four enantiopure HPA-12 stereoisomers in multi-gram scale is reported based on Crystallization-Induced Asymmetric Transformation (CIAT) technology. This preparative stereoselective synthesis allowed the unprecedented comparative evaluation of HPA-12 stereoisomers regarding their interaction with the CERT START domain. In vitro binding assay coupled to in silico docking approach indicate a possible interaction for the four derivatives. The first TR-FRET homogeneous-phase assay was developed to quantify their binding to the START domain, allowing complete determination of HPA-12 EC50. Results indicate that not only the (1R,3S) lead to the strongest binding, but that both 1R and 3S stereocenters similarly contribute to extent of recognition This automated homogenous assay further opens up promising prospect for the identification of novel potential CERT antagonist by means of high throughput screening.