Download MendeleyGalectin-8N-Selective 4-Halophenylphthalazinone-Galactals Double pi-Stack in a Unique Pocket.
van Klaveren, S., Hassan, M., Hakansson, M., Johnsson, R.E., Larsson, J., Jakopin, Z., Anderluh, M., Leffler, H., Tomasic, T., Nilsson, U.J.(2024) ACS Med Chem Lett 15: 1319-1324
- PubMed: 39140038
- DOI: https://doi.org/10.1021/acsmedchemlett.4c00212
- Primary Citation of Related Structures:
9FXZ - PubMed Abstract:
Galectin-8 contains two different carbohydrate recognition domains (CRDs). Selective inhibitors for at least one CRD are desirable for galectin-8 biology studies and potentially for pharmacological purposes. Structure-guided design led to the discovery of potent and selective glycomimetic-heterocycle hybrid ligands, with a 4-( p -bromophenyl)phthalazinone derivative displaying a 34 μM K d for galectin-8N (N-terminal CRD), no binding to galectin-8C (C-terminal CRD), -1, -3, -4N, -7, -9C, or -9N, and >40-fold selectivity over galectin-4C. Selectivity was achieved with the halogenated 4-phenylphthalazinone moiety occupying a galectin-8N-specific sub-pocket. A 1.30 Å resolution X-ray structure revealed the phthalazinone moiety stacking with Arg45 and the 4-bromophenyl moiety stacking both Arg59 and Tyr141 of galectin-8N. Physicochemical and in vitro ADME studies revealed a desirable LogD, which also translated to good passive permeability. The chemical, microsome, and plasma stability support these compounds as promising tool compounds and candidates for hit-to-lead optimization.
- Department of Chemistry, Faculty of Science, Lund University, Naturvetarvägen 14, 223 62, Lund, Sweden.
Organizational Affiliation:
