Enterobactin Protonation and Iron Release: Hexadentate Tris-Salicylate Ligands as Models for Triprotonated Ferric Enterobactin<sup>1</sup>
作者:Seth M. Cohen、Michel Meyer、Kenneth N. Raymond
DOI:10.1021/ja973442s
日期:1998.7.1
enterobactin complex Fe[H3enterobactin] has been the source of some controversy in the literature. The coordination chemistry of the new model ligands tris[(2-hydroxybenzoyl)-2-aminoethyl]amine (TRENSAM) and tris[(2-hydroxy-3-methoxybenzoyl)-2-aminoethyl]amine (TREN(3M)SAM) demonstrate the previously proposed tris-salicylate mode of binding for ferric enterobactin; they form 1:1 metal−ligand complexes with
肠杆菌素介导大肠杆菌和相关细菌的铁吸收。中性质子化铁肠杆菌素复合物 Fe[H3enterobactin] 的结构在文献中引起了一些争议。新模型配体三[(2-羟基苯甲酰基)-2-氨基乙基]胺(TRENSAM)和三[(2-羟基-3-甲氧基苯甲酰基)-2-氨基乙基]胺(TREN(3M)SAM)的配位化学证明先前提出的三水杨酸盐结合铁肠杆菌素的模式;它们与 Fe3+ 和 Al3+ 形成 1:1 的金属配体配合物,通过三水杨基配位结合金属(即螯合物是六元金属环,酚和酰胺氧结合金属中心)。TRENSAM 的铁和铝配合物在单斜空间群 P21/c 中是同构的并结晶。