Molecules incorporating a benzothiazole core scaffold inhibit the N-myristoyltransferase of Plasmodium falciparum

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Abstract
Recombinant N-myristoyltransferase of Plasmodium falciparum (termed PfNMT) has been used in the development of a SPA (scintillation proximity assay) suitable for automation and high-throughput screening of inhibitors against this enzyme. The ability to use the SPA has been facilitated by development of an expression and purification system which yields considerably improved quantities of soluble active recombinant PfNMT compared with previous studies. Specifically, yields of pure protein have been increased from 12 μg·l−1 to >400 μg·l−1 by use of a synthetic gene with codon usage optimized for expression in an Escherichia coli host. Preliminary small-scale ‘piggyback’ inhibitor studies using the SPA have identified a family of related molecules containing a core benzothiazole scaffold with IC50 values 80% at a concentration of 10 μM.

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