Glycan-binding proteins are key components of central physiological and cellular processes such as self-/non-self-recognition, cellular tissue homing, and protein homeostasis. Herein, C-type lectins are a diverse protein family that play important roles in the immune system, rendering them attractive drug targets. To evaluate C-type lectin receptors as target proteins for small-molecule effectors, chemical probes are required, which are, however, still lacking. To overcome the supposedly poor druggability of C-type lectin receptors and to identify starting points for chemical probe development, we screened murine langerin using H-1 and F-19 NMR against a library of 871 drug-like fragments. Subsequently, hits were validated by surface plasmon resonance and enzyme-linked lectin assay. Using structure activity relationship studies and chemical synthesis, we identified thiazolopyrimidine derivatives with double-digit micromolar activity that displayed langerin selectivity. Based on H-10-N-15 HSQC NMR and competitive binding and inhibition experiments, we demonstrate that thiazolopyrimidines allosterically inhibit langerin. To the best of our knowledge, this is the first report of drug-like allosteric inhibitors of a mammalian lectin.
作者:Jonas Aretz、Upendra R. Anumala、Felix F. Fuchsberger、Narges Molavi、Nandor Ziebart、Hengxi Zhang、Marc Nazaré、Christoph Rademacher
DOI:10.1021/jacs.8b08644
日期:2018.11.7
Glycan-binding proteins are key components of central physiological and cellular processes such as self-/non-self-recognition, cellular tissue homing, and protein homeostasis. Herein, C-type lectins are a diverse protein family that play important roles in the immune system, rendering them attractive drug targets. To evaluate C-type lectin receptors as target proteins for small-molecule effectors, chemical probes are required, which are, however, still lacking. To overcome the supposedly poor druggability of C-type lectin receptors and to identify starting points for chemical probe development, we screened murine langerin using H-1 and F-19 NMR against a library of 871 drug-like fragments. Subsequently, hits were validated by surface plasmon resonance and enzyme-linked lectin assay. Using structure activity relationship studies and chemical synthesis, we identified thiazolopyrimidine derivatives with double-digit micromolar activity that displayed langerin selectivity. Based on H-10-N-15 HSQC NMR and competitive binding and inhibition experiments, we demonstrate that thiazolopyrimidines allosterically inhibit langerin. To the best of our knowledge, this is the first report of drug-like allosteric inhibitors of a mammalian lectin.
Methanetricarboxylates as key reagents for the simple preparation of heteroarylcarboxamides with potential biological activity. Part 2. Reaction of methanetricarboxylates with 2-aminopyridine, 2-aminopyrimidine, 2-aminothiazole and 2-aminobenzothiazole
作者:Alexander Kutyrev、Thomas Kappe
DOI:10.1002/jhet.5570360136
日期:1999.1
The reaction of methanetricarboxylates 1a,b with 2-aminopyridine, 2-aminopyrimidine, 2-aminothiazole as well as 2-aminobenzothiazole yields corresponding heteroarylcarboxylic acid esters 2a,b, 5, 8, 11a,b. These heterocyclic esters were used as a starting material by the reaction with primary amines to obtaining a number of heteroarylcarboxylic amides 4a-j, 6, 10a,b, 13a-g bearing various substituents