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对于类保留时间预测的终极解决方案:柱温度对分离选择性的影响
Carina Villacrés1, Benilde Mizero2, Victor Spicer1
1Manitoba Centre for Proteomics and Systems Biology, Winnipeg R3E 3P4, Canada.
列温度在蛋白质组学中显著影响分离. 优化温度通过平衡分离效率和保留来提高的识别,这对于自下而上的蛋白质组学工作流程至关重要.
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:
- 逆相液态色谱与双重质谱学 (LC-MS/MS) 结合,是自下而上蛋白质组学的基石.
- 列温度是影响分离和识别效率的关键参数.
研究的目的:
- 为了研究柱体温度对逆相LC-MS/MS中的分离选择性的影响.
- 为了确定最佳的温度范围,以最大限度地提高的识别在自下而上的蛋白质组学.
- 了解温度对质保留行为的影响,并确定潜在的降解.
主要方法:
- 在不同的柱体温度 (25,35,45,和55°C) 进行了二维 (2D) LC-MS/MS采集.
- 对未经修改和双重质量标签 (TMT) 标记的样品的分析.
- 基于温度变化,开发基于类保留转移的预测模型.
主要成果:
- 由于分离的改善,保留的减少和列上潜在的降解,的识别在45-55°C时达到高原.
- 大约确定了10万种独特的非修饰和12万种独特的TMT标记.
- 随着温度的增加,的保留率线性下降 (无标签和TMT标签的酸分别为0.56%和0.5%每10°C).
结论:
- 列温度是优化基于LC-MS/MS的蛋白质组学中的鉴定的一个关键因素.
- 基于保留转移的预测模型可以指导温度选择,以提高覆盖率.
- 将柱子冷却到0°C可能会使可检测的三性增加3%,而在90°C可能会损失~20%.
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