在Peroxiredoxin 2活性位点中进行阿斯巴拉提酸表皮化化的HPLC与奇拉静止阶段的分离和动力学研究
Xinran Zhang1, Mohamed Abdulbagi1, Limin Wang1
1Department of Pharmaceutical Analysis, China Pharmaceutical University, Nanjing 210009, China; Key Laboratory on Protein Chemistry and Structural Biology, China Pharmaceutical University, Nanjing 210009, China.
Journal of pharmaceutical and biomedical analysis
|May 30, 2024
概括
氨基酸表皮化,将L-氨基酸转化为D-氨基酸,改变了蛋白质的结构和功能. 这项研究开发了一种检测模型中的酸表皮化 (AAE) 的方法,揭示了其在特定条件下的加速.
科学领域:
- 生物化学 生物化学
- 分析化学 分析化学
背景情况:
- 氨基酸表皮化改变了蛋白质的结构和功能.
- 酸表皮化 (AAE) 是一个关键的修饰,由自由基和过氧化物加速.
- 在标准蛋白质分析中,由于质量与电荷比 (m/z) 保持不变,可以忽略AAE.
研究的目的:
- 开发和验证一种新的,特定地点的HPLC方法来确定AAE.
- 在Peroxiredoxin 2 (AP) 的模型中研究AAE的动力学.
主要方法:
- 开发和验证一个特定站点的HPLC方法,使用一种性静止阶段.
- 在Peroxiredoxin的活性位点 (AP) 中AAE的分析 2.
- 在各种条件下对AAE的动力学研究.
主要成果:
- 开发的HPLC方法表现出良好的线性 (1-200μg/mL) 和准确的量化 (85-115%的回收在LOQ).
- 发现AP中的AAE在酸和Cu2+共存时迅速发生.
- 随着时间的推移,AAE的程度增加,并且与过氧化生成有积极的相关性.
结论:
- 建立了一种可靠的HPLC方法,用于特定地点的AAE确定.
- 该研究阐明了加速AAE的因素,特别是在Peroxiredoxin 2的背景下.
- 这些发现突出了氧化条件通过AAE对蛋白质完整性的影响.
相关概念视频
High-Performance Liquid Chromatography: Introduction
2.0K
High-performance liquid chromatography(HPLC), formerly referred to as High-pressure liquid chromatography, is a powerful technique used to separate, identify, and quantify components in complex mixtures. The term "high pressure" refers to using high pressure to push the liquid mobile phase through the tightly packed columns.
In HPLC, two phases play a critical role in the separation process:
In HPLC, two phases play a critical role in the separation process:
2.0K
Sharpless Epoxidation
4.0K
The conversion of allylic alcohols into epoxides using the chiral catalyst was discovered by K. Barry Sharpless and is known as Sharpless epoxidation. The use of a chiral catalyst enables the formation of one enantiomer of the product in excess. This chiral catalyst is mainly a chiral complex of titanium tetraisopropoxide and tartrate ester (specific stereoisomer). The stereoisomer used in the chiral catalyst dictates the formation of the enantiomer of the product. In other words, the use of...
4.0K
Prochirality
3.8K
The concept of prochirality leads to the nomenclature of the individual faces of a molecule and plays a crucial role in the enantioselective reaction. It is a concept where two or more achiral molecules react to produce chiral products. A typical process is the reaction of an achiral ketone to generate a chiral alcohol. Here, the achiral reactant reacts with an achiral reducing agent, sodium borohydride, to generate an equimolar mixture of the chiral enantiomers of the product. For example, an...
3.8K


