基于二硫代氨基甲酸盐自组装的糖芯片制备与表征

引用本文: 程昉, 王汉奇, 许旷, 何炜. 基于二硫代氨基甲酸盐自组装的糖芯片制备与表征[J]. 物理化学学报, 2017, 33(2): 426-434. doi: 10.3866/PKU.WHXB201609291 shu

Citation: CHENG Fang, WANG Han-Qi, XU Kuang, HE Wei. Preparation and Characterization of Dithiocarbamate Based Carbohydrate Chips[J]. Acta Physico-Chimica Sinica, 2017, 33(2): 426-434. doi: 10.3866/PKU.WHXB201609291 shu

基于二硫代氨基甲酸盐自组装的糖芯片制备与表征

1.
大连理工大学精细化工国家重点实验室, 辽宁大连 116023;
2.
大连理工大学制药科学与技术学院, 辽宁大连 116023;
3.
大连理工大学化工学院, 辽宁大连 116023
基金项目:
国家自然科学基金（21104008，21231003），中央高校基本科研业务费（DUT16RC（3）019）和青年千人计划资助项目

摘要: 糖基传感芯片是定量研究糖-蛋白相互作用的有力工具。传统糖基传感芯片的制备过程通常涉及糖基硫醇衍生物的合成，过程复杂且产率较低。本文采用脱氧氨基糖与二硫化碳温和条件下一步反应合成了一类新型糖基自组装功能分子-糖基二硫代氨基甲酸盐（DTC）化合物，进而在金衬底芯片上构筑了糖基传感功能膜。采用X射线光电子能谱（XPS）分析了该糖基传感功能膜的元素组成和元素化学环境；采用表面等离子体共振（SPR）和酶联凝集素分析（ELLA）技术定量分析了其在蛋白质水平的糖生物学活性。通过混合自组装的方法，制备了一系列表面葡萄糖密度不同的糖基传感功能膜并测定了伴刀豆球蛋白（Con A）吸附的热力学和动力学数据。通过调控表面密度，我们观察到了蛋白在葡萄糖表面吸附的多价态现象。当自组装溶液中葡萄糖-DTC摩尔分数低于1%时，Con A呈现单价态吸附，其解离平衡常数（K_d）为（39.10±0.12）μmol·L^-1；当自组装溶液中葡萄糖-DTC摩尔分数高于2%时，Con A呈现多价态吸附，解离平衡常数降至（1.17±0.18）μmol·L^-1。本文所发展的糖基自组装功能分子合成方法快速便捷、适用范围广，通过混合自组装可以实现蛋白结合价态的调控，是一种深入研究基于糖-蛋白相互作用的诸多生物过程的有效工具。

关键词:

English

Preparation and Characterization of Dithiocarbamate Based Carbohydrate Chips

1.
State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116023, Liaoning Province, P. R. China;
2.
School of Pharmaceutical Science and Technology, Dalian University of Technology, Dalian 116023, Liaoning Province, P. R. China;
3.
School of Chemical Engineering, Dalian University of Technology, Dalian 116023, Liaoning Province, P. R. China
Received Date: 12 August 2016
Revised Date: 28 September 2016
Fund Project:
The project was supported by the National Natural Science Foundation of China (21104008, 21231003), Fundamental Research Funds for the Central Universities, China (DUT16RC(3)019) and Recruitment Program of Global Youth Experts, China.

Abstract: Carbohydrates chips are powerful tools for quantitatively studying protein-carbohydrate interactions. Typically, carbohydrate chips are prepared using the self-assembly of carbohydrate thiol/disulfide, which always requires multiple hydroxyl group protection/deprotection steps resulting low conversion in the preparation. In this paper, a kind of carbohydrate derivatives containing dithiocarbamate (DTC) group was synthesized through a two-step reaction to prepare self-assembled monolayers presenting carbohydrate (glycol-DTC SAMs). The glycol-DTC SAMs was characterized using X-ray photoelectron spectroscopy (XPS) and the protein binding activity was quantitatively analysized using surface plasma resonance (SPR) and enzyme linked lectin assay (ELLA). By mixed self-assembly of carbohydrate dithiocarbamate and sarcosine dithiocarbamate, Glycol-DTC SAMs with different glucose density were prepared. The protein binding kinetics was monitored in real time and the thermodynamics was calculated. Interestingly, a 1:1 binding of concanavalin A (Con A) was obtained on the SAMs prepared in solution containing 1% glucose-DTC, as the dissociation constant (K_d) was calculated to be (39.10±0.12) μmol·L^-1. A 1:2 binding of Con A was obtained on the SAMs prepared in solutions containing >2% glucose-DTC, as the K_d was calculated to be (1.17±0.18) μmol·L^-1. By simply mixed selfassembly, multivalent binding of Con A can be realized and separate kinetic parameters can be obtained. Our work would promote the study of protein-carbohydrate interactions and be helpful for revealing the relevant biological progress.

Key words:

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

基于二硫代氨基甲酸盐自组装的糖芯片制备与表征

English

Preparation and Characterization of Dithiocarbamate Based Carbohydrate Chips

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

基于二硫代氨基甲酸盐自组装的糖芯片制备与表征

English

Preparation and Characterization of Dithiocarbamate Based Carbohydrate Chips

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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