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投稿时间:2016-07-25
投稿时间:2016-07-25
中文摘要: 采用自制的壳聚糖-Zn 亲和层析介质对罗非鱼蛋白多肽进行分离纯化, 筛选出与 Zn2+有较强配位作用的亲 和肽,并研究 Zn2+与亲和肽的配位作用动力学及形成配合物的结构特征。采用高效液相色谱、电感耦合等离子体质谱
(ICP-MS)、紫外及红外光谱仪、扫描电子显微镜等分析手段对肽-锌配合物进行结构表征。结果表明,制备的壳聚糖-Zn 亲和介质能够实现从罗非鱼蛋白酶解产物中选择性筛选分离出与 Zn2+有较强配位作用的亲和肽; 多肽原液、TP1 组分、TP2 组分与 Zn2+通过配合反应形成肽-锌配合物的锌含量分别为 8.533 %、1.700 %、16.87 %; 所得亲和肽与 Zn2+ 具有较强配位作用,配合物的稳定常数为 1.005×106,并分析了肽-锌配合物的基本结构特征。
Abstract:Tilapia protein hydrolysate peptide was separated and purified by using zinc chelating polysaccharide affinity chromatography media. And the complexation reaction of peptide with zinc was investigated. The struc- ture characteristic of peptide-zinc complexes was characterized by HPLC, ICP-MS, UV -vis spectroscopy, FT-IR spectroscopy and SEM. The results showed that the tilapia hydrolysis polypeptide had been effectively purified and proved that chelating reaction between peptide and Zn2+ had occurred and zinc-binding peptide complexes had been produced. The total zinc content of zinc-binding peptide complexes produced by hydrolysis polypeptide, TP1 and TP2 were 8.533 %, 1.700 % and 16.87 %, respectively. The properties of zinc-peptide complexes was stable whose stability constant was 1.005×106.
keywords: IMAC(immobilized metal-chelate affinity chromatography) polypeptide zinc-ion zinc-peptide complexation chelation reaction
文章编号:201710010 中图分类号: 文献标志码:A
基金项目:广东省科技计划项目(2015A020209192,2014A010107029); 广州市科技计划项目(201604020089);广州市黄埔区科技计划项目(201516/20150000644)
Author Name | Affiliation |
ZHANG Jin-jie,YUAN Yang, ZENG Qing-zhu* | College of Chemical Engineering, Guangzhou University, Guangzhou 510006, Guangdong, China |
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