当前位置: X-MOL 学术Nat. Rev. Mol. Cell Biol. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Target gene-independent functions of MYC oncoproteins.
Nature Reviews Molecular Cell Biology ( IF 81.3 ) Pub Date : 2020-02-18 , DOI: 10.1038/s41580-020-0215-2
Apoorva Baluapuri 1 , Elmar Wolf 1 , Martin Eilers 1
Affiliation  

Oncoproteins of the MYC family are major drivers of human tumorigenesis. Since a large body of evidence indicates that MYC proteins are transcription factors, studying their function has focused on the biology of their target genes. Detailed studies of MYC-dependent changes in RNA levels have provided contrasting models of the oncogenic activity of MYC proteins through either enhancing or repressing the expression of specific target genes, or as global amplifiers of transcription. In this Review, we first summarize the biochemistry of MYC proteins and what is known (or is unclear) about the MYC target genes. We then discuss recent progress in defining the interactomes of MYC and MYCN and how this information affects central concepts of MYC biology, focusing on mechanisms by which MYC proteins modulate transcription. MYC proteins promote transcription termination upon stalling of RNA polymerase II, and we propose that this mechanism enhances the stress resilience of basal transcription. Furthermore, MYC proteins coordinate transcription elongation with DNA replication and cell cycle progression. Finally, we argue that the mechanism by which MYC proteins regulate the transcription machinery is likely to promote tumorigenesis independently of global or relative changes in the expression of their target genes.

中文翻译:

MYC 癌蛋白的靶基因独立功能。

MYC 家族的癌蛋白是人类肿瘤发生的主要驱动因素。由于大量证据表明 MYC 蛋白是转录因子,因此研究它们的功能主要集中在其靶基因的生物学上。对 MYC 依赖性 RNA 水平变化的详细研究通过增强或抑制特定靶基因的表达,或作为转录的全局放大器,提供了 MYC 蛋白致癌活性的对比模型。在这篇综述中,我们首先总结了 MYC 蛋白的生物化学以及关于 MYC 靶基因的已知(或不清楚)。然后,我们讨论了定义 MYC 和 MYCN 相互作用组的最新进展,以及这些信息如何影响 MYC 生物学的核心概念,重点是 MYC 蛋白调节转录的机制。MYC 蛋白在 RNA 聚合酶 II 停滞时促进转录终止,我们提出这种机制增强了基础转录的应激弹性。此外,MYC 蛋白协调转录延长与 DNA 复制和细胞周期进程。最后,我们认为 MYC 蛋白调节转录机制的机制可能会促进肿瘤发生,而与其靶基因表达的整体或相对变化无关。
更新日期:2020-02-18
down
wechat
bug