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首页> 外文期刊>Journal of biochemical and molecular toxicology >Exploring the influence of MPA‐capped CdTe quantum dots on the structure and function of lysozyme probing by spectroscopic and calorimetric methods
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Exploring the influence of MPA‐capped CdTe quantum dots on the structure and function of lysozyme probing by spectroscopic and calorimetric methods

机译:探讨MPA升压CDTE量子点对光谱和量热法溶酶探测的结构和功能的影响

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Abstract The effect of 3‐mercaptopropionic acid (MPA)‐capped CdTe quantum dots (QDs) on lysozyme was systematically investigated by spectroscopic methods, enzyme activity assay, and calorimetry techniques. Results show that the MPA‐capped CdTe QDs binded to lysozyme through van der Walls forces and hydrogen bondings, causing the decrement of α‐helical content (~7%) and increment of β‐sheet content (~11%) of lysozyme. The binding caused static quenching of the fluorescence, while the microenvironment of aromatic amino acid residues did not show any significant alteration. The lysozyme activity was affected by the increasing exposure of QDs, it was inhibited to 53.77% under a 6?×?10 ?7 ?M exposure compared with the control group. This work will provide direct evidence about enzyme toxicity of QDs to lysozyme in vitro .
机译:摘要通过光谱法,酶活性测定和量热技术系统地研究了3-巯基丙酸(MPA)CDTE酸(MPA)CDTE Quateum点(QDS)对溶菌酶的影响。 结果表明,通过范德壁力和氢键合的MPA封端的CDTE QD与溶菌酶结合,导致α-螺旋含量(〜7%)和β-片状含量(〜11%)的溶菌酶增量递增。 结合引起荧光的静猝灭,而芳族氨基酸残基的微环境没有显示出任何显着的改变。 与对照组相比,溶菌酶活性受到QDS的越来越多的QDS,抑制至53.77%的影响。 这项工作将为体外提供关于QDS QDS酶毒性的直接证据。

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