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识别微蛋白编码的内基多基化异型,以及在基因毒性抗癌药物反应中的功能

Alexandre Devaux^1,2,3, Iris Tanaka^1,2,3, Quentin Fouilleul^1,2,3

¹INSERM U1278, CNRS UMR3348, Institut Curie, Université PSL, Orsay, 91400, France.

|October 24, 2025

概括

内部多基化 (IPA) 异型是微蛋白的新来源. 这些IPA异型,特别是5'UTR中的异型,受到西斯的上调,并影响癌症药物反应.

科学领域:

分子生物学分子生物学
基因组学就是基因组学.
癌症研究癌症研究

背景情况:

内部多基化 (IPA) 生成编码正规蛋白质的转录异型.
微蛋白,从小的开放阅读框架 (sORFs) 翻译,是一种新兴的蛋白质类.
在此之前,IPA异构体在微蛋白生产中的作用是未知的.

研究的目的:

为了研究内部多基化 (IPA) 异型能否产生微蛋白.
为了识别和表征微蛋白编码IPA异型.
探索这些异构体的调节和功能,特别是对抗癌药物的反应.

主要方法:

对3seq,Ribo-Seq和质谱数据的综合分析.
长时间读取的RNA-seq和3seq在西斯丁治疗的肺癌细胞中.
克里斯普尔编辑,西部斑点和蛋白质验证的免疫光学.
多体概况分析以评估翻译.

主要成果:

鉴定了297个具有微蛋白编码IPA异型 (miP-5 UTR-IPA异型) 的基因.
在全球范围内,西斯普拉丁治疗通过抑制转录过程性,有利于miP-5 UTR-IPA异型而不是全长mRNA.
证明了一种特定的miP-5 UTR-IPA异型 (PRKAR1B-IPA-miP2) 的翻译及其在促进p53诱导中的作用.
IPA位点的CRISPR编辑或sORF#2降低了对基因毒药物的敏感性.

结论:

内部多基化 (IPA) 异型代表了微蛋白的新型来源.
介绍了miP-5 UTR-IPA基因的概念,产生了规范和微蛋白编码异型.
miP-5 UTR-IPA 异型及其编码的微蛋白在细胞对基因毒性压力的反应中起作用.

关键词:

替代的最后一个外型子.这是一种破坏DNA的毒剂.内部的多基化.微类微是一种微.小型的ORF是一个小的ORF.

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