RNA Decay Factor UPF1 Promotes Protein Decay: A Hidden Talent.

RNA Decay Factor UPF1 Promotes Protein Decay: A Hidden Talent.
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DOI:
10.1002/bies.201700170
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发表时间:
2018-01
期刊:
BioEssays : news and reviews in molecular, cellular and developmental biology
影响因子:
--
通讯作者:
Wilkinson MF
Wilkinson MF
中科院分区:
其他
文献类型:
--
作者:
M Plank TD;Wilkinson MF

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RNA结合蛋白UPF 1是无义介导的RNA衰变(NMD)途径中的中心因子。Feng等人现在报道了UPF 1的一种新功能-它是一种E3泛素连接酶,特异性促进一种关键的前肌肉转录因子MYOD的衰变。UPF 1通过其RING样结构域实现这一点,该结构域赋予泛素E3连接酶活性。UPF 1的E3连接酶活性的生理相关性得到了两个发现的支持:(i)UPF 1抑制肌生成和(ii)UPF 1的E3连接酶活性的破坏加剧了这种抑制。在未来,重要的是要确定UPF 1驱动的泛素化的其他蛋白质底物,并确定这种生物化学活性是否是UPF 1的许多生物学功能,包括发育和应激反应。Feng等人提出的令人兴奋的发现开辟了蛋白质周转和RNA周转是耦合过程的可能性。
The RNA-binding protein, UPF1, is best known as the central factor in the nonsense-mediated RNA decay (NMD) pathway. Feng et al. now report a new function for UPF1 – it is an E3 ubiquitin ligase that specifically promotes the decay of a key pro-muscle transcription factor: MYOD. UPF1 achieves this through its RING-like domain, which confers ubiquitin E3 ligase activity. Physiological relevance for UPF1’s E3 ligase activity is supported by two findings: (i) UPF1 suppresses myogenesis and (ii) disruption of UPF1’s E3 ligase activity alleviates this repression. In the future, it will be important to define other protein substrates of UPF1-driven ubiquitination and to determine whether this biochemical activity is responsible for some of UPF1’s many biological functions, including in development and stress responses. The exciting findings presented by Feng et al. open up the possibility that protein turnover and RNA turnover are coupled processes.
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