Prions, protein homeostasis, and phenotypic diversity.

Prions, protein homeostasis, and phenotypic diversity.
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DOI:
10.1016/j.tcb.2009.12.003
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发表时间:
2010-03
影响因子:
19
通讯作者:
Lindquist, Susan
Lindquist, Susan
中科院分区:
生物学1区
文献类型:
--
作者:
Halfmann, Randal;Alberti, Simon;Lindquist, Susan

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Prions are fascinating but often misunderstood protein aggregation phenomena. The traditional association of the mammalian prion protein with disease has overshadowed a potentially more interesting attribute of prions - their ability to create protein-based molecular memories. In fungi, prions alter the relationship between genotype and phenotype in a heritable way that diversifies clonal populations. Recent findings in yeast indicate that prions may be much more common than previously realized. Moreover, prion-driven phenotypic diversity increases under stress, and can be amplified by the dynamic maturation of prion-initiating states. We argue that these qualities allow prions to act as bet-hedging devices that facilitate yeast’s adaptation to stressful environments, and may speed the evolution of new traits.
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