基于IS-PRM的片向是通过长读序列测序来进行替代蛋白质组检测的信息
Jennifer A Korchak1, Erin D Jeffery1, Saikat Bandyopadhyay1,2
1Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, Virginia 22903, United States.
Journal of the American Society for Mass Spectrometry
|July 16, 2024
概括
这项研究介绍了Tomahto,一种使用长读RNA测序来识别新型蛋白质异型的向蛋白质基因组方法. 这种方法显著提高了蛋白质水平上替代拼接事件的检测.
科学领域:
- 蛋白质基因组学是什么
- 质谱测量质量谱测量
- 文字转录学 (Transcriptomics) 是一个学科.
- 替代拼接是一种替代拼接.
背景情况:
- 替代拼接产生多样化的转录异型,但它们转化为功能性蛋白质往往未得到证实.
- 检测异型特异性是具有挑战性的,因为低丰度和技术限制,留下许多蛋白质异型未绘制.
- 针对性质谱 (MS) 策略,如内部标准并行反应监测 (IS-PRM),提供敏感的检测,但尚未用于新确认.
研究的目的:
- 开发和验证一个有针对性的蛋白质基因组方法,以确认新型蛋白质异型.
- 利用长时间读取的RNA测序 (lrRNA-seq) 数据来预测和检测异型特异性.
- 评估IS-PRM方法的性能,称为Tomahto,用于识别以前未注释的蛋白质异型.
主要方法:
- 一种蛋白质基因组策略,将样本匹配的lrRNA-seq数据与向质谱学 (Tomahto) 整合在一起.
- lrRNA-seq数据为55个基因中的192种异型特异性提供了合成"触发"的设计信息.
- 标有超重双重质量标签 (TMT) 的合成被入标有TMT的细胞消化器中进行IS-PRM分析.
主要成果:
- 与数据依赖获取 (DDA) 模式相比,Tomahto方法的异形检测能力增加了3.6倍.
- 确定了五种以前未被注释的蛋白质异型.
- 在43个基因中,54种已解决的单异型中确认了蛋白质表达.
结论:
- 基于lrRNA-seq的Tomahto方法为生成替代异构体的蛋白质水平证据提供了一种新的模式.
- 这种方法对于推进功能研究和开发蛋白质异型体的临床试验至关重要.
- 这项研究表明了整合转录基因和蛋白质基因数据的力量,以实现全面的异构体发现.
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