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ID: ALA4049423
Journal: J Med Chem
Title: Discovery of Novel 1,4-Diacylpiperazines as Selective and Cell-Active eIF4A3 Inhibitors.
Authors: Ito M, Tanaka T, Cary DR, Iwatani-Yoshihara M, Kamada Y, Kawamoto T, Aparicio S, Nakanishi A, Imaeda Y.
Abstract: Eukaryotic initiation factor 4A3 (eIF4A3), a member of the DEAD-box RNA helicase family, is one of the core components of the exon junction complex (EJC). The EJC is known to be involved in a variety of RNA metabolic processes typified by nonsense-mediated RNA decay (NMD). In order to identify molecular probes to investigate the functions and therapeutic relevance of eIF4A3, a search for selective eIF4A3 inhibitors was conducted. Through the chemical optimization of 1,4-diacylpiperazine derivatives identified via high-throughput screening (HTS), we discovered the first reported selective eIF4A3 inhibitor 53a exhibiting cellular NMD inhibitory activity. A surface plasmon resonance (SPR) biosensing assay ascertained the direct binding of 53a and its analog 52a to eIF4A3 and revealed that the binding occurs at a non-ATP binding site. Compounds 52a and 53a represent novel molecular probes for further study of eIF4A3, the EJC, and NMD.
CiteXplore: 28358513