TP53-inducible putative long noncoding RNAs encode functional polypeptides that suppress cell proliferation.

TP53-inducible putative long noncoding RNAs encode functional polypeptides that suppress cell proliferation.
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TP53诱导的假定长非编码RNA编码抑制细胞增殖的功能性多肽

DOI:
10.1101/gr.275831.121
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发表时间:
2022-06
期刊:
影响因子:
7
通讯作者:
Yang, Jianhua
Yang, Jianhua
中科院分区:
生物学1区
文献类型:
--
作者:
Xu, Wenli;Liu, Chang;Deng, Bing;Lin, Penghui;Sun, Zhenghua;Liu, Anrui;Xuan, Jiajia;Li, Yuying;Zhou, Keren;Zhang, Xiaoqin;Huang, Qiaojuan;Zhou, Hui;He, Qingyu;Li, Bin;Qu, Lianghu;Yang, Jianhua

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由长链非编码RNA编码的多肽(lncRNA)是一类新型的功能分子。然而,这些隐藏的多肽是否参与TP 53通路并发挥重要的生物学作用仍不清楚。在这里,我们发现TP 53调节的lncRNA可以编码肽,其中两个在各种人类细胞系中具有功能。在HepG 2细胞中使用核糖体分析和RNA-seq方法,我们系统地鉴定了300多个新的TP 53调节的lncRNA,并进一步证实了这些TP 53调节的lncRNA中的15个编码肽。此外,通过质谱法验证了几种肽。十种新型翻译lncRNA可由TP 53直接诱导以响应DNA损伤。我们发现,TP 53诱导肽TP 53 LC 02和TP 53 LC 04,但不是他们的lncRNA,可以抑制细胞增殖。TP 53 LC 04肽还具有通过响应DNA损伤调节细胞周期而与细胞增殖相关的功能。这项研究表明,TP 53调节的lncRNA可以编码新的功能肽,导致TP 53肿瘤抑制网络的扩展,并为癌症治疗提供新的潜在靶点。
Polypeptides encoded by long noncoding RNAs (lncRNAs) are a novel class of functional molecules. However, whether these hidden polypeptides participate in the TP53 pathway and play a significant biological role is still unclear. Here, we discover that TP53-regulated lncRNAs can encode peptides, two of which are functional in various human cell lines. Using ribosome profiling and RNA-seq approaches in HepG2 cells, we systematically identified more than 300 novel TP53-regulated lncRNAs and further confirmed that 15 of these TP53-regulated lncRNAs encode peptides. Furthermore, several peptides were validated by mass spectrometry. Ten of the novel translational lncRNAs are directly inducible by TP53 in response to DNA damage. We show that the TP53-inducible peptides TP53LC02 and TP53LC04, but not their lncRNAs, can suppress cell proliferation. TP53LC04 peptide also has a function associated with cell proliferation by regulating the cell cycle in response to DNA damage. This study shows that TP53-regulated lncRNAs can encode new functional peptides, leading to the expansion of the TP53 tumor-suppressor network and providing novel potential targets for cancer therapy.
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