Enzymatic Sulfation of Isoamyl Gallate and (-)-Epigallocatechin Gallate by Bacterial Arylsulfotransferase.
作者:Motoaki KOIZUMI、Teruaki AKAO、Lisa IMAMURA、Keiji DOHI、Takashi YOSHIDA、Takuo OKUDA、Kyoichi KOBASHI
DOI:10.1248/cpb.40.1864
日期:——
A novel type of arylsulfotransferase which was obtained from a human intestinal bacterium catalyzes the sulfation of polyphenols related to tannins. Isoamyl gallate and (-)-epigallocatechin gallate were found to be sulfated rapidly using p-nitrophenylsulfate as a donor substrate. In the case of isoamyl gallate, two sulfated products, 3-monosulfate and 4-monosulfate, were isolated when an equimolar amount of p-nitrophenylsulfate was incubated with isoamyl gallate. In the case of (-)-epigallocatechin gallate. 4'-monosulfate was isolated at an equimolar incubation of donor and acceptor. Thus, arylsulfotransferase was useful for the convenient preparation of sulfate esters of these polyphenols.
从人类肠道细菌中获得的一种新型芳基硫基转移酶可催化与单宁酸有关的多酚硫酸化。研究发现,以对硝基苯硫酸盐为供体底物,没食子酸异戊酯和(-)-表没食子儿茶素没食子酸酯可被快速硫酸化。就没食子酸异戊酯而言,当等摩尔量的对硝基苯基硫酸盐与没食子酸异戊酯孵育时,可分离出两种硫酸化产物,即 3-单硫酸盐和 4-单硫酸盐。对于(-)-表没食子儿茶素没食子酸酯。在供体和受体等摩尔培养的情况下,分离出 4'-单硫酸盐。因此,芳基硫转移酶有助于方便地制备这些多酚的硫酸酯。