Reporter Ligand NMR Screening
Method for 2‑Oxoglutarate
Oxygenase Inhibitors
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Abstract
The human 2-oxoglutarate (2OG) dependent oxygenases belong
to a
family of structurally related enzymes that play important roles in
many biological processes. We report that competition-based NMR methods,
using 2OG as a reporter ligand, can be used for quantitative and site-specific
screening of ligand binding to 2OG oxygenases. The method was demonstrated
using hypoxia inducible factor hydroxylases and histone demethylases,
and <i>K</i><sub>D</sub> values were determined for inhibitors
that compete with 2OG at the metal center. This technique is also
useful as a screening or validation tool for inhibitor discovery,
as exemplified by work with protein-directed dynamic combinatorial
chemistry