A systematic survey identifies prions and illuminates sequence features of prionogenic proteins.
A systematic survey identifies prions and illuminates sequence features of prionogenic proteins.
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一项系统调查鉴定了朊病毒并阐明了朊病毒蛋白的序列特征。
DOI:
10.1016/j.cell.2009.02.044
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发表时间:
2009-04-03
期刊:
影响因子:
64.5
通讯作者:
Lindquist S
中科院分区:
文献类型:
--
作者:
Alberti S;Halfmann R;King O;Kapila A;Lindquist S
Prions are proteins that convert between structurally and functionally distinct states, one or more of which is transmissible. In yeast, this ability allows them to act as non-Mendelian elements of phenotypic inheritance. To further our understanding of prion biology, we conducted a bioinformatic proteome-wide survey for prionogenic proteins in S. cerevisiae, followed by experimental investigations of 100 prion candidates. We found an unexpected amino acid bias in aggregation-prone candidates and discovered that 19 of these could also form prions. At least one of these prion proteins, Mot3, produces a bona fide prion in its natural context that increases population-level phenotypic heterogeneity. The self-perpetuating states of these proteins present a vast source of heritable phenotypic variation that increases the adaptability of yeast populations to diverse environments.
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