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研究领域工程学纳米技术纳米光子学
通过有效的QM/MM方法探索Renilla中的发光剂

通过有效的QM/MM方法探索Renilla中的发光剂

Ashim Nandi ¹, Aoxuan Zhang ¹, Zhen Tao Chu ¹, Wen Jun Xie ², Zhongxin Xu ³, Suwei Dong ³, Arieh Warshel ¹

Ashim Nandi ¹, Aoxuan Zhang ¹, Zhen Tao Chu ¹

¹Department of Chemistry, University of Southern California, Los Angeles, California 90089-1062, United States.
²Department of Medicinal Chemistry, Center for Natural Products, Drug Discovery and Development (CNPD3), Genetics Institute, University of Florida, Gainesville, Florida 32610, United States.
³State Key Laboratory of Natural and Biomimetic Drugs, Chemical Biology Center, and School of Pharmaceutical Sciences, Peking University, Beijing 100191, China.

⁰Department of Chemistry, University of Southern California, Los Angeles, California 90089-1062, United States.

Journal of the American Chemical Society +

|

2024年五月8日

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在PubMed上查看摘要

概括

此摘要是机器生成的。

生物发光涉及生物体的光产生. 这项研究揭示了coelenteramide的酸盐状态是Renilla luciferase 8 (RLuc8) 发光的关键,而质子转移影响了这一过程.

科学领域

生物化学
生物物理
计算化学

背景情况

生物发光是生物通过生物化学反应发出的光.
来自Renilla reniformis的光酶 (RLuc) 发出蓝光,并用于生物发光标记.
RLuc8是一种RLuc的变体,具有八种氨基酸替代.

研究的目的

研究RLuc8中的发光物种和质子转移 (PT) 机制.
了解蛋白质结构在调节生物发光中的作用.
验证用于研究光蛋白中的染色体状态和PT的计算方法.

主要方法

量子力学一致力场 (QM/MM-FD) 方法.
半宏观蛋白质双极-朗格温双极 (PDLD/S) 方法与线性响应近似.
对RLuc8及其变体 (RLuc8-D120A,RLuc8-D162A,AncFT-D160A) 的计算建模.

主要成果

在RLuc8中,coelenteramide的酸盐状态被确定为主要发光物种.
从中性胆胺转移到Asp162对于生物发光至关重要.
计算模型准确地复制了各种RLuc8变体和AncFT-D160A的实验性排放最大值.

结论

该研究证实了coelenteramide作为RLuc8中的发射剂的酸盐状态.
质子转移机制显著影响生物发光光谱.
计算方法为研究光蛋白中的PT和设计新生物发光系统提供了强大的框架.

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相关概念视频

Photoluminescence: Applications

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Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...

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