生物冲浪器用于系统地跟踪导致蛋白质异型多样性的调节机制
Mayank Murali1, Jamie Saquing2, Senbao Lu3,4
1Broad Institute of MIT and Harvard University, Cambridge, MA, USA.
bioRxiv : the preprint server for biology
|April 1, 2024
概括
生物冲浪器是一种新的计算工具,通过跟踪转录组,拼接和翻译变异来分析蛋白质异型. 它揭示了替代转录起点驱动大多数N-终端变异,而移是C-终端多样性的关键.
科学领域:
- 基因组学就是基因组学.
- 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:
- 长读RNA测序 (RNA-seq) 揭示了转录组复杂性,但理解蛋白质异型的功能仍然具有挑战性.
- 研究由替代拼接驱动的蛋白质组多样性的起源对于功能性见解至关重要.
研究的目的:
- 介绍 Biosurfer,一种计算方法,通过跟踪底层的转录组,拼接和翻译变异来比较蛋白质异型.
- 系统地分析蛋白质序列变化的来源,包括N-终端,内部区域和C-终端.
主要方法:
- 开发了Biosurfer,这是一个Python包,用于分析长时间读取的RNA测序数据.
- 应用Biosurfer进行了32799对GENCODE注释蛋白质异型的比较.
- 分析了人类细胞系长期读取的RNA-seq预测的蛋白质组.
主要成果:
- 70%的可变N终端来自替代转录起点;9%来自5' UTR替代拼接.
- 17%的内部序列变化是由于"被撕裂的编码子"从交叉点上的分裂编码子.
- 72%的可变C端涉及移,包括新的"快回"移,恢复阅读.
结论:
- 生物扫描器对从人类细胞系中长期读取的RNA-seq数据的分析证实了GENCODE的发现,其中更高比例的异构体被预测为无意中介衰变.
- 这种全面的表征加速了对蛋白质异型体的功能作用的洞察.
- Biosurfer提供了来自替代拼接的蛋白质组多样性的机制解释,并作为一个Python包提供.
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