Pressure-Induced Fluorescence Enhancement of the BSA-Protected Gold Nanoclusters and the Corresponding Conformational Changes of Protein

Pressure-Induced Fluorescence Enhancement of the BSA-Protected Gold Nanoclusters and the Corresponding Conformational Changes of Protein
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BSA 保护的金纳米团簇的压力诱导荧光增强及相应的蛋白质构象变化

DOI:
10.1021/jp309175k
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发表时间:
2013-01
影响因子:
3.7
通讯作者:
Zou, Bo
Zou, Bo
中科院分区:
化学3区
文献类型:
--
作者:
Zhang, Min;Dang, Yong-Qiang;Liu, Tian-Ying;Li, Hong-Wei;Wu, Yuqing;Li, Qian;Wang, Kai;Zou, Bo

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我们通过原位荧光和红外光谱测量研究了 BSA 保护的金纳米团簇 AuNCs@BSA 的压力诱导荧光增强,以及配体蛋白相应的构象变化。据文献记载,AuNCs@BSA的荧光增强本质上是由于配体的构象变化,配体发生了实质性的二级和三级结构变化。在压缩下,BSA 失去了更多的埋藏 α 螺旋结构,而 AuNCs@BSA 中的变化相反,因为蛋白质在金纳米团簇的边界表面采用了更灵活的构象状态。本工作将有助于理解其基本机制,揭示纳米团簇中配体的重要影响因素,有望最终提高金纳米团簇的发光效率。
We investigated the pressure-induced fluorescence enhancement of BSA-protected gold nanoclusters, AuNCs@BSA, and the corresponding conformational changes of ligand protein by in situ fluorescence and IR spectral measurements. It is documented that the fluorescence enhancement of AuNCs@BSA is essentially attributed to the conformational changes of the ligand, which undergoes substantial secondary and tertiary structural changes. Under compression BSA loses more buried α-helical structure, while it changes oppositely in the AuNCs@BSA as the protein adopts a more flexible conformational state at the boundary surface of gold nanoclusters. The present work will be helpful to understand the fundamental mechanism and to reveal the important factors of ligands in nanoclusters, which are hope to improve the luminescence efficiency of gold nanoclusters in final.
DOI: 10.1002/bip.360370404
发表时间: 1995-01-01
期刊: BIOPOLYMERS
影响因子: 2.9
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