NCIt definition : A thioamide derivative with antitubercular activity. Protionamide forms a covalent
adduct with bacterial nicotinamide adenine dinucleotide (NAD), PTH-NAD, which competitively
inhibits 2-trans-enoyl-ACP reductase (inhA), an enzyme essential for mycolic acid
synthesis. This results in increased cell wall permeability and decreased resistance
against cell injury eventually leading to cell lysis. Mycolic acids, long-chain fatty
acids, are essential mycobacterial cell wall components and play a key role in resistance
to cell injury and mycobacterial virulence.;