A new chiral ligand exchange capillary electrophoresis system based on Zn(<scp>ii</scp>)–<scp>l</scp>-leucine complexes coordinating with β-cyclodextrin and its application in screening tyrosinase inhibitors
作者:Yuan Su、Xiaoyu Mu、Li Qi
DOI:10.1039/c4ra09433f
日期:——
hyper pigmentation in animals and enzymatic browning in food. Thus, it is of great significance to screen inhibitors of tyrosinase. In this work, a new chiral ligand exchange-capillary electrophoresis (CLE-CE) system based on the coordination effect of Zn(II)–L-leucine complexes and β-cyclodextrin (β-CD) was developed for screening the inhibitors of tyrosinase. The effects of the concentration of β-CD
酪氨酸酶在黑色素形成中起关键作用,并且与动物体内的色素沉着过多和食物中的酶促褐变密切相关。因此,筛选酪氨酸酶抑制剂具有重要意义。在这项工作中,基于Zn(II)-L-亮氨酸复合物和β-环糊精(β-CD)的协同作用,开发了一种新的手性配体交换-毛细管电泳(CLE-CE)系统,用于筛选酪氨酸酶抑制剂。β-CD的浓度的影响,缓冲液pH的比值,大号-亮氨酸对于Zn(II),并用DNS-复杂浓度进行了调查d,大号-酪氨酸,DNS- d,大号-缬氨酸和DNS- d,L-苯丙氨酸作为被测分析物。最佳的缓冲条件包括pH值为8.2的100.0 mM硼酸,5.0 mM乙酸铵,3.0 mM Zn(II),6.0 mM L-亮氨酸和4.0 mMβ-CD。已经发现六对Dns- D,L -AA可以被基线分离,并且五对Dns- D,L- AA被部分地对映分离。然后对L-酪氨酸进行了定量分析,并以12.95μM至413.3μM的浓度获得了良好的线性(r