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Probing the Complex Binding Modes of the PPAR? Partial Agonist 2-Chloro-N-(3-chloro-4-((5-chlorobenzo[d]thiazol-2-yl)thio)phenyl)-4-(trifluoromethyl)benzenesulfonamide (T2384) to Orthosteric and Allosteric Sites with NMR Spectroscopy.


ABSTRACT: In a previous study, a cocrystal structure of PPAR? bound to 2-chloro-N-(3-chloro-4-((5-chlorobenzo[d]thiazol-2-yl)thio)phenyl)-4-(trifluoromethyl)benzenesulfonamide (1, T2384) revealed two orthosteric pocket binding modes attributed to a concentration-dependent biochemical activity profile. However, 1 also bound an alternate/allosteric site that could alternatively account for the profile. Here, we show ligand aggregation afflicts the activity profile of 1 in biochemical assays. However, ligand-observed fluorine (19F) and protein-observed NMR confirms 1 binds PPAR? with two orthosteric binding modes and to an allosteric site.

SUBMITTER: Hughes TS 

PROVIDER: S-EPMC5179221 | BioStudies | 2016-01-01

REPOSITORIES: biostudies

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