谷胱甘肽键合柱对蛋白的选择性研究

doi:10.6023/A12040088

化学学报 ›› 2012, Vol. 70 ›› Issue (15): 1637-1642.DOI: 10.6023/A12040088 上一篇下一篇

研究论文

谷胱甘肽键合柱对蛋白的选择性研究

柯从玉, 孙妩娟, 张群正, 郑莉

西安石油大学化学化工学院西安 710065

投稿日期:2012-04-08 发布日期:2012-05-26
通讯作者: 柯从玉
基金资助:
项目受国家自然科学基金(No. 39880003)、西安石油大学博士科研启动基金(No. YS29030804)及陕西省“13115”科技创新工程重大科技专项(No. 2010ZDKG-46)资助.

Selectivity Research of Glutathione Bonded Column for Proteins

Ke Congyu, Sun Wujuan, Zhang Qunzheng, Zheng Li

College of Chemistry & Chemical Engineering, Xi'an Shiyou University, Xi'an 710065, China

Received:2012-04-08 Published:2012-05-26
Supported by:
Project supported by the National Natural Science Foundation of China (No. 39880003), Doctoral Start-up Foundation of Xi'an Shiyou University (No. YS29030804) and the “13115” Science and Technology Innovation Project of Great Science and Technology Special Foundation of Shaanxi Province (No. 2010ZDKG-46).

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摘要/Abstract

通过将谷胱甘肽键合到硅胶表面合成了同时具有弱阳离子交换(WCX)、疏水(HIC)和氢键作用的多功能色谱填料, 该固定相在HIC和WCX模式下对蛋白都有很好的分离效果. 实验通过计量置换保留模型对蛋白在谷胱甘肽键合柱上的色谱保留行为及机理进行了研究, 结果发现, 在流动相盐浓度较低时蛋白根据自身等电点高低通过静电作用力得以分离, 而在高盐浓度下疏水和氢键作用力共同决定蛋白的保留. 这种多作用力保留模式可有效提高色谱柱的选择性, 尤其为蛋白质、多肽及氨基酸的高效分离提供新的解决思路.

关键词: 多功能色谱填料, 离子交换色谱, 疏水相互作用色谱, 计量置换保留模型, 蛋白质分离

The multifunctional stationary phase with the properties of weak cation exchange (WCX), hydrophobic and hydrogen bonding interaction was synthesized by bonded the glutathione (GSH) to the silica surface. Five standard proteins myoglobin (Myo), ribonuclease (RNase), cytochrome (Cyt-C), α-Chymotrypsin (α-Chy) and lysozyme (Lys) were selected to evaluate the column efficiency. The experiments show that the stationary phase has the good separation performance for proteins both in hydrophobic interaction chromatography (HIC) and ion exchange chromatography (IEC). More importantly, the proteins separation in both HIC and IEC mode can be accomplished only by a single column and a kind of mobile phase. In order to compare the resolution of multifunctional column with other column, two popular commercial columns of TSKgel Ether-5PW in HIC mode and TSKgel CM-5PW in IEC mode were tested under optimum condition. It was found that the multifunctional column has a good resolution both in IEC and HIC mode compared with commercial TSKgel columns. The eluted order of five proteins were the same on multifunctional and TSKgel CM-5PW column in IEC mode, but there is a big different between multifunctional column and TSKgel Ether-5PW column in HIC mode, the eluted order of Myo and RNase as well as α-Chy and Lys are changed completely. This indicates that the selectivity of the multifunctional column is significantly better than that of the TSKgel columns. The chromatographic retention behaviors and mechanisms for proteins in glutathione bonded column were studied. The results demonstrate that there are two retention mechanisms for a basic protein, at a low salt concentration, the retention time of proteins is decreased with the increasing of salt concentration and the proteins were separated by electrostatic force, while in high salt concentration the retention time of proteins is increased with the increasing of salt concentration and proteins were separated by hydrogen bonding interaction force. This multi-interaction forces retention mode can effectively improve the selectivity of HPLC column. The research provides a new solution for high performance separation of proteins, peptides and amino acids.

Key words: multifunctional stationary phase, ion exchange chromatography (IEC), hydrophobic interaction chromatography (HIC), stoichiometric displacement theory for retention (STD-R), proteins separation

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柯从玉, 孙妩娟, 张群正, 郑莉. 谷胱甘肽键合柱对蛋白的选择性研究[J]. 化学学报, 2012, 70(15): 1637-1642.

Ke Congyu, Sun Wujuan, Zhang Qunzheng, Zheng Li. Selectivity Research of Glutathione Bonded Column for Proteins[J]. Acta Chimica Sinica, 2012, 70(15): 1637-1642.

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谷胱甘肽键合柱对蛋白的选择性研究

Selectivity Research of Glutathione Bonded Column for Proteins

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