More than Just a Phase: Prions at the Crossroads of Epigenetic Inheritance and Evolutionary Change.
More than Just a Phase: Prions at the Crossroads of Epigenetic Inheritance and Evolutionary Change.
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DOI:
10.1016/j.jmb.2018.07.017
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发表时间:
2018-11-02
影响因子:
5.6
通讯作者:
Jarosz DF
中科院分区:
文献类型:
--
作者:
Chakravarty AK;Jarosz DF
A central tenet of molecular biology is that heritable information is stored in nucleic acids. But this paradigm has been overturned by a group of proteins called ‘prions’. Prion proteins, many of which are intrinsically disordered, can adopt multiple conformations, at least one of which has the capacity to self-template. This unusual folding landscape drives a form of extreme epigenetic inheritance that can be stable through both mitotic and meiotic cell divisions. Although the first prion discovered – mammalian PrP – is the causative agent of debilitating neuropathies, many additional prions have now been identified that are not obviously detrimental and can even be adaptive. Intrinsically disordered regions, which endow proteins with the bulk property of ‘phase-separation,’ can also be drivers of prion formation. Indeed, many protein domains that promote phase separation have been described as prion-like. In this review, we describe how prions lie at the crossroads of phase-separation, epigenetic inheritance and evolutionary adaptation.
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