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:
影响因子:
--
通讯作者:
Wilkinson MF
中科院分区:
文献类型:
--
作者:
M Plank TD;Wilkinson MF
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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