在NMD目标的成熟过程中经历了死化,并在衰变过程中经历了内核解裂
Marcus J Viscardi1, Joshua A Arribere1
1Department of Molecular, Cellular and Developmental Biology, University of California at Santa Cruz, Santa Cruz, CA, USA.
bioRxiv : the preprint server for biology
|October 9, 2023
概括
细胞通过使用无意中介的mRNA衰变 (NMD) 提前停止编码子降解有害的mRNA. 这项研究表明,NMD主要使用SMG-6依赖的内核分解裂变,而不是死乙烯化,来攻击这些mRNA.
科学领域:
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
- 遗传学 遗传学 是一个
背景情况:
- 无意中介的mRNA衰变 (NMD) 是一种关键的细胞监测途径,可以消除含有过早停止编码子的mRNA,防止产生潜在有害的截断蛋白质.
- 参与NMD目标mRNA降解的确切分子机制和关键因素尚不完全理解,阻碍了治疗应用.
- 现有的模型建议mRNA衰变通过死乙烯化,外核分解或内核分解发生,但它们在NMD中的相对贡献尚不清楚.
结论:
- 在动物中,NMD因子通过在过早停止密码子附近的内核分解裂变,共同降解NMD目标mRNA.
- 死亡化似乎是一种一般的mRNA成熟过程,而不是特定于NMD.的机制.
- 这项研究阐明了NMD目标在动物细胞中受到攻击的主要机制.
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