微生物角蛋白酶在纳米粒子制备中的应用

doi:10.16085/j.issn.1000-6613.2020-0212

化工进展 ›› 2020, Vol. 39 ›› Issue (11): 4575-4580.DOI: 10.16085/j.issn.1000-6613.2020-0212

微生物角蛋白酶在纳米粒子制备中的应用

叶金鹏¹(), 龚劲松¹, 陈霞², 蒋敏¹, 李恒¹, 李会¹, 许正宏¹^,³, 史劲松¹()

^1.江南大学药学院，糖化学与生物技术教育部重点实验室，江苏无锡 214122
^2.无锡市滨湖区荣巷街道社区卫生服务中心，江苏无锡 214151
^3.江南大学生物工程学院，粮食发酵工艺与技术国家工程实验，江苏无锡 214122

出版日期:2020-11-05 发布日期:2020-11-06
通讯作者: 史劲松
作者简介:叶金鹏（1996—），男，硕士研究生，研究方向为微生物与生化药学。E-mail：772606259@qq.com。
基金资助:
国家自然科学基金(21978116);江苏省重点研发计划(BE2018622)

Application of microbial keratinase in biopreparation of AuNPs

Jinpeng YE¹(), Jinsong GONG¹, Xia CHEN², Min JIANG¹, Heng LI¹, Hui LI¹, Zhenghong XU¹^,³, Jinsong SHI¹()

^1.Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Pharmaceutical Sciences, Jiangnan University, Wuxi 2141222, Jiangsu, China
^2.Rongxiang Street Community Health Service Center of Binhu District, Wuxi 214151, Jiangsu, China
^3.National Engineering Laboratory for Cereal Fermentation Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China

Online:2020-11-05 Published:2020-11-06
Contact: Jinsong SHI

摘要/Abstract

摘要：

金纳米粒子传统制备主要采用物理或化学方法，存在着过程复杂、条件苛刻、化学试剂用量高等缺点，而生物法由于环境友好、作用条件温和等特性逐步受到关注。本研究利用角蛋白酶的还原性制备金纳米粒子，恒温反应，分别对反应过程中氯金酸浓度、酶添加量和反应时间三个因素进行优化，并通过动态光散射（DLS）、zeta电位分析、透射电镜（TEM）及红外吸收光谱（FTIR）对制备的金纳米粒子进行表征。结果表明：在1mmol/L的氯金酸溶液中加入1400U角蛋白酶，反应5h得到的金纳米胶体在550nm左右的吸收峰最显著，反应收率达到85%。红外吸收光谱分析显示3100~3500cm^-1处的酰胺N—H键的不对称伸缩振动峰和1650cm^-1处的酰胺Ⅰ带，证明角蛋白酶本身参与了金纳米粒子的合成，所得纳米金的粒径在30nm以下，zeta电位值为-13mV，粒子之间没有聚集。该方法具有良好的稳定性和可操作性，为金纳米粒子的绿色化制备提供了一种新途径。

关键词: 角蛋白酶, 纳米粒子, 还原, 绿色制备, 优化

Abstract:

Gold nanoparticles are traditionally prepared by the physical or chemical methods, which have disadvantages such as complex process, harsh conditions and high chemical reagent consumption, and biological method has been paid more and more attention due to its low pollution and mild operating conditions. In this study, gold nanoparticles were prepared by the reductive property of keratinase. Three factors including the concentration of chloroauric acid solution, the amount of enzyme added and the reaction time were optimized. The gold nanoparticles were characterized by dynamic light scattering (DLS), zeta potential analysis, transmission electron microscopy (TEM) and infrared absorption spectroscopy (FTIR). When adding 1400U of keratinase to 1mmol/L chloroauric acid solution and after 5h, the absorption peak of gold nanoparticles obtained was the most significant at about 550nm and the reaction yield reached 85%. The amide Ι bond at 1650cm^-1 and the amino bond N—H between 3100~3500cm^-1 in the spectra demonstrated that the keratinase was involved in the synthesis of gold nanoparticles. The measured size of gold nanoparticles was less than 30nm, the zeta potential value was -13mV and there was no aggregation between particles. The method has good operability and stability, which provides a new way for green preparation of gold nanoparticles.

Key words: keratinase, nanoparticles, reduction, green synthesis, optimization

中图分类号:

Q814.9

叶金鹏, 龚劲松, 陈霞, 蒋敏, 李恒, 李会, 许正宏, 史劲松. 微生物角蛋白酶在纳米粒子制备中的应用[J]. 化工进展, 2020, 39(11): 4575-4580.

Jinpeng YE, Jinsong GONG, Xia CHEN, Min JIANG, Heng LI, Hui LI, Zhenghong XU, Jinsong SHI. Application of microbial keratinase in biopreparation of AuNPs[J]. Chemical Industry and Engineering Progress, 2020, 39(11): 4575-4580.

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微生物角蛋白酶在纳米粒子制备中的应用

Application of microbial keratinase in biopreparation of AuNPs

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