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Gallium-complex of anguibactin, a siderophore from fish pathogen Vibrio anguillarum

机译:鱼类病原体鳗弧菌的铁载体,安古他汀的镓络合物

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The crystal structure determination of the Ga(III) complex of racemized anguibactin (C15H16N4O4S) confirms the previously predicted chemical structure of this novel siderophore isolated from the fish pathogenic bacterium, Vibrio anguillarum 775. The structure of the complex consists of a dimeric binuclear unit, (C15H14N4O4S . CH3O)(2)Ga-2 which possesses a crystallographic center of symmetry. Each Ga ion forms a distorted octahedral coordination using one of the dihydroxy catechol O atoms, the thiazoline nitrogen, the hydroxamate (N-O) group and the nonprotonated nitrogen atom of the imidazole ring. The coordination sphere is completed by two bridging methoxide oxygen atoms. The dimer is further stabilized by a pair of hydrogen bonds between the second benzohydroxy group and the nitroso oxygen of the hydroxamate group. Crystal data: C15H14N4O4SGa .(CH3O).(1.5) (CH3OH), monoclinic, P2(1), a = 16.890(4), b = 11.680(3), c = 11.227(3)Angstrom, beta = 110.29(4)degrees, V = 2077.4(9)Angstrom(3), Z = 4, D-calc = 1.583 g cm(-3), lambda = 1.54178 Angstrom. [References: 9]
机译:外消旋阿古巴汀(C15H16N4O4S)Ga(III)配合物的晶体结构确定,证实了从鱼类致病细菌鳗弧菌775中分离出的这种新型铁载体的先前预测化学结构。该配合物的结构由二聚双核单元组成, (C15H14N4O4S.CH3O)(2)Ga-2,具有对称的晶体学中心。每个Ga离子使用二羟基邻苯二酚O原子,噻唑啉氮,异羟肟酸(N-O)基团和咪唑环的非质子化氮原子之一形成扭曲的八面体配位。配位球是由两个桥接的甲醇氧原子完成的。通过第二苯甲羟基和异羟肟酸酯基团的亚硝基氧之间的一对氢键进一步稳定二聚体。晶体数据:C15H14N4O4SGa。(CH3O)。(1.5)(CH3OH),单斜晶系,P2(1)/ n,a = 16.890(4),b = 11.680(3),c = 11.227(3)埃,beta = 110.29 (4)度,V = 2077.4(9)埃(3),Z = 4,D-calc = 1.583 g cm(-3),λ= 1.54178埃。 [参考:9]

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