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在热冲击期间,piRNAs保护了拼接和RNA忠实性

Sehee Min¹, Johnny Cruz-Corchado¹, Veena Prahlad¹

¹Department of Cell Stress Biology, Roswell Park Comprehensive Cancer Center, Elm and Carlton Streets, Buffalo, NY 14263.

bioRxiv : the preprint server for biology

|November 24, 2025

概括

皮维相互作用RNAs (piRNAs) 通过延迟拼接来保护热冲击期间的RNA质量. 这可以防止错误,并保护蛋白质完整性与无意中介衰变 (NMD) 一起.

科学领域:

分子生物学分子生物学
遗传学遗传学是一个
在RNA生物学,RNA生物学.

背景情况:

已知Piwi交互RNAs (piRNAs) 能够沉默转子和异物遗传元素.
皮RNAs对内源性信使RNAs (mRNAs) 的向尚未完全理解.
RNA质量控制机制对于维持细胞功能至关重要.

研究的目的:

研究piRNA途径在RNA质量控制中的作用.
了解piRNAs在细胞应激过程中如何起作用,例如热冲击.
阐明piRNA与新生转录和RNA聚合酶II相互作用的机制.

主要方法:

使用*Caenorhabditis elegans*作为一个模型生物.
研究热冲击对RNA处理和稳定的影响.
通过piRNA途径研究了内源性反感RNAs (endo-siRNAs) 的生成.
检查了piRNAs,endo-siRNAs,RNA聚合酶II和新生的RNAs的关联.

主要成果:

在热冲击期间,piRNAs产生与RNA聚合酶II和新生的压力诱导RNAs相关的内分泌siRNAs.
这种关联在拼接体受损时延迟了新生的转录的拼接,从而最大限度地减少了错误.
在没有piRNA的情况下,发生过早的拼接,导致转录错误和无意中介衰变 (NMD) 的激活.

结论:

该piRNA途径通过调节压力期间的拼接,在RNA质量控制中发挥关键作用.
这种调节功能补充了无意中介衰变 (NMD) 在保护RNA忠诚度.
该piRNA途径通过防止异常蛋白质的积累,有助于蛋白质组的完整性和基因组防御.

关键词:

这里是C. elegans.在RNA质量控制方面.内部-siRNAsss 的使用情况.热冲击是一种热冲击.这里是HSPHSP.无意义中介衰变 (NMD) 是一种无意义中介衰变.这就是为什么piRNARNA.蛋白质的平衡是蛋白质的平衡.拼接拼接拼接拼接转录忠诚度忠诚度

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