Abstract
Tuberculosis (TB) remains the leading cause of mortality due to a single bacterial pathogen, Mycobacterium tuberculosis. There is a need for the development of new antimycobacterial agents. M. tuberculosis 2-trans-enoyl-ACP(CoA) reductase (InhA) is the main target of isoniazid, the most prescribed anti-TB agent. Here we present pre-steady state kinetics and equilibrium data of 2-trans-dodecenoyl-CoA substrate binding to InhA. These results indicate both positive homotropic cooperativity upon substrate binding to InhA, and a bimolecular association process followed by a slow isomerization of the enzyme-substrate binary complex. The data here described should help the rational design of new agents against a validated and druggable protein target with potential anti-TB activity.
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