漆酶
手性(物理)
半胱氨酸
柠檬酸
酶
化学
圆二色性
催化作用
多酚氧化酶
米氏-门汀动力学
立体化学
有机化学
酶分析
物理
手征对称破缺
量子力学
Nambu–Jona Lasinio模型
过氧化物酶
夸克
作者
Xiting Wang,KeRu Deng,Jie Wu,Yurong Ma,Xin Du,Mengling Zhang,Hui Huang,Yang Liu,Zhenhui Kang
出处
期刊:ACS applied nano materials
[American Chemical Society]
日期:2022-10-25
卷期号:5 (11): 16812-16820
被引量:3
标识
DOI:10.1021/acsanm.2c03777
摘要
Chiral carbon dots (CDots) attract extensive attention due to their promising application in the biological field. Their biological effects strongly depend on their chiral structure. Laccase (Lac) is a classic multicopper-containing polyphenol oxidase. The impact of the chirality of CDots on the Lac activity has not been fully emphasized and studied yet. Here, chiral CDots are prepared by thermal polymerization from l/d-cysteine (l/d-Cys) and citric acid (CA), where the obtained twins of chiral CDots possess all the same properties such as size, charge, and elemental content, except chirality. The d-CDots (256 μg mL–1) could improve the catalytic activity of Lac (88%), while the l-CDots have no obvious effect on Lac at the same concentration. Based on the results of the Michaelis constant (Km) and circular dichroism (CD) spectra, compared with l-CDots, the superior catalytic performance of d-CDots is due to the preferable combination toward Lac, resulting in the change of the α helix structure of Lac. Our work reveals the important implications for solving the problem of limited and selective regulation of enzyme activity.
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