Laboratoire de Chimie de Biologie des Métaux, UMR 5249, Université Joseph Fourier, Grenoble-1, CNRS-CEA 17, Rue des Martyrs, 38054 Grenoble Cedex 9, France.
Angew Chem Int Ed Engl. 2012 Jul 27;51(31):7711-4. doi: 10.1002/anie.201202261. Epub 2012 Jun 19.
Stop for NadA! A [4Fe-4S] enzyme, NadA, catalyzes the formation of quinolinic acid in de novo nicotinamide adenine dinucleotide (NAD) biosynthesis. A structural analogue of an intermediate, 4,5-dithiohydroxyphthalic acid (DTHPA), has an in vivo NAD biosynthesis inhibiting activity in E. coli. The inhibitory effect can be explained by the coordination of DTHPA thiolate groups to a unique Fe site of the NadA [4Fe-4S] cluster.
抑制 NadA!一种 [4Fe-4S] 酶,NadA,催化从头合成烟酰胺腺嘌呤二核苷酸 (NAD) 中喹啉酸的形成。一种中间体的结构类似物,4,5-二硫代羟基邻苯二甲酸 (DTHPA),在大肠杆菌中具有抑制体内 NAD 生物合成的活性。DTHPA 硫醇基团与 NadA [4Fe-4S] 簇的独特 Fe 位配位可以解释这种抑制作用。