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[1]石 成,吕 中*.氧化铜/蛋白质复合物的过氧化物酶及抗菌活性[J].武汉工程大学学报,2022,44(04):422-427.[doi:10.19843/j.cnki.CN42-1779/TQ.202201010]
 SHI Cheng,Lü Zhong*.Peroxidase and Antibacterial Activities of CuO-Proteincomposite[J].Journal of Wuhan Institute of Technology,2022,44(04):422-427.[doi:10.19843/j.cnki.CN42-1779/TQ.202201010]
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氧化铜/蛋白质复合物的过氧化物酶及抗菌活性(/HTML)
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《武汉工程大学学报》[ISSN:1674-2869/CN:42-1779/TQ]

卷:
44
期数:
2022年04期
页码:
422-427
栏目:
生物与环境工程
出版日期:
2022-08-31

文章信息/Info

Title:
Peroxidase and Antibacterial Activities of CuO-Proteincomposite
文章编号:
1674 - 2869(2022)04 - 0422 - 06
作者:
石 成吕 中*
武汉工程大学环境生态与生物工程学院,湖北 武汉 430205
Author(s):
SHI ChengLü Zhong*
School of Environmental Ecology and Biological Engineering,Wuhan Institute of Technology,Wuhan 430205,China
关键词:
纳米酶氧化铜/牛血清白蛋白纳米复合物过氧化物酶活性抗菌
Keywords:
nanozymescopper oxide/bovine serum albumin nanocomposite peroxidase activityantibacteria
分类号:
TQ465.91
DOI:
10.19843/j.cnki.CN42-1779/TQ.202201010
文献标志码:
A
摘要:
细菌耐药性的日益严重使得新型抗菌剂的开发迫在眉睫,纳米酶的出现为抗菌剂的研究提供了新方向。利用水热法合成生物相容性好的氧化铜/牛血清白蛋白(CuO-BSA)纳米复合物,利用过氧化氢/3,3’,5,5’-四甲基联苯胺(H2O2/TMB)比色体系研究CuO-BSA复合物的过氧化物酶活性和酶促反应动力学,采用菌落计数法测定CuO-BSA对金黄色葡萄球菌的抗菌活性。结果显示所合成的CuO-BSA复合物具有过氧化物酶活性,在pH为4和温度为55 ℃时表现出最佳酶活性。该复合物对底物TMB和H2O2的米氏常数分别为0.29 mmol/L和43.19 mmol/L,对底物TMB的亲和力超过天然辣根过氧化物酶。CuO-BSA催化H2O2过程中产生了毒性更强的羟基自由基。100 μg/mL的CuO-BSA联合1 mmol/L的H2O2作用时,细菌存活率仅为3.1%。结果表明:本研究所合成的CuO-BSA纳米复合物具有较好的过氧化物酶活性,在抗菌方面具有应用潜能。
Abstract:
The development of new antibacterial agents is urgent due to the increasing drug-resistance of bacteria. The emergence of nanozymes provides a new direction for the research of antibacterial agents. Copper oxide/bovine serum albumin (CuO-BSA) nanocomposite with good biocompatibility was synthesized by hydrothermal method. The peroxidase activity and enzymatic reaction kinetics of CuO-BSA nanocomposite were studied by using hydrogen peroxide/3,3’,5,5’-tetramethylbenzidine (H2O2/TMB) colorimetric system.The antibacterial activity of CuO-BSA against Staphylococcus aureus was determined by the colony counting method. The results show that the synthesized CuO-BSA complex presents a peroxidase activity, and the best enzymatic activity is at pH 4 and 55 ℃. The Michaelis-Menten constants of the complex for the substrates TMB and H2O2 are 0.29 mmol/L and 43.19 mmol/L, respectively. The affinity of the complex for substrate TMB exceeds that of the natural horseradish peroxidase. The more toxic hydroxyl radical is generated during the catalysis of H2O2 by CuO-BSA. After treatment by 100 μg/mL CuO-BSA and 1 mmol/L H2O2, the bacterial survival rate is only 3.1%. The above results indicate that the CuO-BSA nanocomposites synthesized in this study have good peroxidase activity and potential application in the antibacterial field.

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备注/Memo

备注/Memo:
收稿日期:2022-01-23
基金项目:国家自然科学基金(21371139)
作者简介:石 成,硕士研究生。E-mail:2996842399@qq.com
*通讯作者:吕 中,博士,教授。E-mail:zhonglu@wit.tdu.cn
引文格式:石成,吕中. 氧化铜/蛋白质复合物的过氧化物酶及抗菌活性[J]. 武汉工程大学学报,2022,44(4):422-427.

更新日期/Last Update: 2022-08-25