对于翻译后改性的保留时间预测:Ser,Thr,Tyr-酸化
Taylor Battellino1, Darien Yeung2, Haley Neustaeter1
1Department of Chemistry, University of Manitoba, 360 Parker Building, 144 Dysart Road, Winnipeg, R3T 2N2, Canada.
Journal of chromatography. A
|February 15, 2024
概括
一种新的基保留模型预测了酸化如何影响色谱学中的基行为. 酸化通常会增加保留,但特定的序列和环境因素会导致显著的变化,这对于蛋白质组学分析至关重要.
科学领域:
- 蛋白质组学是指蛋白质组学.
- 分析化学 分析化学
- 生物化学 生物化学
背景情况:
- 酸化是一种关键的翻译后修饰,调节蛋白质功能.
- 在染色体学中准确预测的行为对于蛋白质学至关重要.
- 了解酸化引起的保留转移对于分离和鉴定至关重要.
研究的目的:
- 在逆相染色学中开发化的化保留预测模型.
- 为了确定影响因酸化而导致保留转移的关键特征.
- 评估不同移动相变剂和分离条件对化保持的影响.
主要方法:
- 使用1D和2DLC-MS/MS分析了超过10,000个酸化/非酸化类对.
- 使用酸作为离子配对修饰剂评估保留特征.
- 评估各种移动相变剂 (酸,酸,三酸,七酸) 和2DLC条件 (高pH RP,HILIC,离子交换).
主要成果:
- 单次酸化事件增加了Ser,Thr和Tyr残留物的保留 (平均移位:分别为+1.46%,+1.33%,+0.93%的ACN).
- 保留转移因残留位置,邻近的残留物,长度,疏水性,pI和螺旋性而有显著差异 (ACN为2.4%至5.5%).
- 离子配对修饰器的疏水性决定了保留转移的幅度和方向,更多的疏水性修饰器会导致更大的正转移.
结论:
- 考虑酸化的类保留预测模型是可行的,并且对蛋白质组学有价值.
- 酸化诱导的保留变异性受序列,结构和色谱条件的影响.
- 优化离子配对修饰剂和分离策略对于有效分析酸化酸至关重要.
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