Carboxylic Acid Isostere Derivatives of Hydroxypyridinones as Core Scaffolds for Influenza Endonuclease Inhibitors.
Stokes, R.W., Kohlbrand, A.J., Seo, H., Sankaran, B., Karges, J., Cohen, S.M.(2023) ACS Med Chem Lett 14: 75-82
- PubMed: 36655124 
- DOI: https://doi.org/10.1021/acsmedchemlett.2c00434
- Primary Citation of Related Structures:  
7V04, 8CTF, 8DAL, 8DDB, 8DDE, 8DHN, 8DJV, 8DJY - PubMed Abstract: 
Among the most important influenza virus targets is the RNA-dependent RNA polymerase acidic N-terminal (PA N ) endonuclease, which is a critical component of the viral replication machinery. To inhibit the activity of this metalloenzyme, small-molecule inhibitors employ metal-binding pharmacophores (MBPs) that coordinate to the dinuclear Mn 2+ active site. In this study, several metal-binding isosteres (MBIs) were examined where the carboxylic acid moiety of a hydroxypyridinone MBP is replaced with other groups to modulate the physicochemical properties of the compound. MBIs were evaluated for their ability to inhibit PA N using a FRET-based enzymatic assay, and their mode of binding in PA N was determined using X-ray crystallography.
Organizational Affiliation: 
Department of Chemistry and Biochemistry, University of California, La Jolla, California 92093, United States.