全长度mRNA测序解决了在人类CD4 T细胞激活过程中表达的基因在5' UTR长度中的新奇变异
Cassandra R Woolley1, Julia H Chariker2, Eric C Rouchka3,4
1Department of Microbiology and Immunology, University of Louisville School of Medicine, Louisville, KY, USA.
Immunogenetics
|February 4, 2025
概括
长读异形测序 (Iso-Seq) 揭示了激活的人类CD4T细胞中广泛的转录变异. 许多基因表现出延长的5'未翻译区域 (UTR),影响RNA稳定性和蛋白质表达.
科学领域:
- 分子生物学分子生物学
- 免疫学 免疫学 免疫学
- 基因组学就是基因组学.
背景情况:
- 异形测序 (Iso-Seq) 提供高度准确的,全长的mRNA转录读取.
- mRNA的未翻译区域 (UTR) 可能含有影响基因表达的调节元素.
- 了解转录变异对于理解T细胞激活等细胞过程至关重要.
研究的目的:
- 为了生成第一个被激活的人类CD4T细胞的Iso-Seq参考转录组.
- 为了研究T细胞激活期间的转录异型变异,特别是在5' UTR中.
- 识别新型的转录异型并评估它们的功能影响.
主要方法:
- 异形测序 (Iso-Seq) 应用于已激活的人类 CD4 T 细胞.
- 生物信息分析以识别新的拼接变体和终端变体.
- 在模型细胞系统中对新型异构体的功能性研究.
主要成果:
- 发现了许多新的拼接和终端变体转录.
- 在大约12.5%的表达基因中发现显著延长的5' UTR.
- 鉴定了两种新型CXCR5异型的特征,由于5' UTR修改导致转录稳定性和翻译动力学发生变化.
结论:
- 当前的参考数据库可能不足以捕捉完整的转录多样性.
- Iso-Seq 是一个强大的工具,用于揭示复杂的转录组景观.
- 转录和后转录调节,包括5' UTR变异,在免疫细胞激活过程中显著影响蛋白质表达.
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