作者:Yoshimitsu Kakuta、Lars C Pedersen、Kun Chae、Wen-Chao Song、Darryl Leblanc、Robert London、Charles W Carter、Masahiko Negishi
DOI:10.1016/s0006-2952(97)00465-6
日期:1998.2
estradiol and dehydroepiandrosterone, respectively. In sharp contrast, the synthetic estrogen diethylstilbestrol was metabolized efficiently by both enzymes to its disulfate ester. These sulfotransferases display highly stereospecific sulfotransferase activity for sulfating only the trans-isomer of diethylstilbestrol. Crystals suitable for high-resolution structure determination of estrogen sulfotransferase
为了研究其对天然和合成类固醇激素的底物特异性,在大肠杆菌细胞中表达了三种小鼠胞质磺基转移酶。Km和Vmax值分别证实了雌激素和羟类固醇磺基转移酶对雌二醇和脱氢表雄酮的底物特异性较高。与之形成鲜明对比的是,合成的雌激素二乙基己烯雌酚被两种酶有效地代谢成其二硫酸酯。这些磺基转移酶显示出仅对二乙基间苯三酚的反式异构体进行硫酸化的高度立体特异性的磺基转移酶活性。用聚乙二醇生长适合于高分辨率结构测定雌激素磺基转移酶的晶体。晶体属于正交晶体空间群P2(1)2(1)2,并衍射到2.5A。