免费:用于对同位素外评估的增强特征表示,在上下质谱解卷过程中
Jiancheng Zhong1, Xingran Song1, Shaokai Wang2
1College of Information Science and Engineering, Hunan Normal University, ChangSha 410081, China.
Analytical chemistry
|July 22, 2024
概括
用于同位素外评估的增强特征表示 (FREE) 通过分析峰值强度和外形状来改善质谱解卷. 这种方法提供了卓越的精度,并在多种不同的蛋白质组中识别出更多的蛋白质形式-光谱匹配.
科学领域:
- 质谱测量质量谱测量
- 蛋白质组学是指蛋白质组学.
- 生物信息学是一种生物信息学.
背景情况:
- 上下质谱的解卷对于识别单同位素峰值至关重要.
- 准确评估理论和实验包的相似性对于质谱数据的解卷至关重要.
- 现有的方法往往缺乏全面的评估,仅依赖强度和m/z相似性.
研究的目的:
- 为同位素外评估开发一个增强的特征表示 (免费).
- 改进理论和实验包裹之间的相似性的全面和精细评估.
- 克服质谱解卷现有评估方法的局限性.
主要方法:
- 免费开发,以获得各种特征表示,包括峰值强度和信封形状.
- 在卵巢瘤 (OT) 和斑马鱼 (ZF) 数据集上免费接受培训和评估.
- 通过使用多个评估指标,与最先进的方法比较FREE的性能.
主要成果:
- 与现有方法相比,FREE在OT和ZF数据集中表现出更高的性能和精度.
- 在ZF数据中,FREE发现了更多的阳性包裹和增加的蛋白形-光谱匹配 (PrSMs).
- 结合FREE和TopFD,在多种蛋白质组中发现了更多的碎片离子和PrSM,表现优于EnvCNN.
结论:
- 免费提供了一个强大的和通用的方法,以对同位素包评价在顶向下的质谱.
- 增强的特征表示显著提高了质谱解卷的准确性和全面性.
- 在各种生物样本中,FREE可更准确地识别蛋白形和碎片离子.
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