Differences in prion strain conformations result from non-native interactions in a nucleus.
Differences in prion strain conformations result from non-native interactions in a nucleus.
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DOI:
10.1038/nchembio.306
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发表时间:
2010-03
影响因子:
14.8
通讯作者:
Tanaka, Motomasa
中科院分区:
文献类型:
--
作者:
Ohhashi, Yumiko;Ito, Kazuki;Toyama, Brandon H.;Weissman, Jonathan S.;Tanaka, Motomasa
Aggregation-prone proteins often misfold into multiple distinct amyloid conformations dictating their different physiological impacts. Although amyloid formation is triggered by a transient nucleus, the mechanism of how an initial nucleus is formed and allows the protein to form a specific amyloid conformation remains unclear. Here we show that, prior to fiber formation, the prion domain (Sup35NM, consisting of residues 1-254) of yeast prion Sup35, the [PSI+] protein determinant, forms oligomers in a temperature-dependent, reversible manner. Mutational and biophysical analyses revealed that “nonnative” aromatic interactions outside of the amyloid core drive oligomer formation by bringing different Sup35NM monomers together, which specifically leads to the formation of highly infectious strain conformations with more limited amyloid cores. Thus, transient nonnative interactions in the initial nucleus play pivotal roles in determining the diversity of amyloid conformations and resulting prion strain phenotypes.
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影响因子:
9.8
作者:
Collins SR;Douglass A;Vale RD;Weissman JS
通讯作者:
Weissman JS
DOI:
10.1038/nsb961
发表时间:
2003-09-01
期刊:
NATURE STRUCTURAL BIOLOGY
影响因子:
--
作者:
Lee, S;Eisenberg, D
通讯作者:
Eisenberg, D
影响因子:
64.8
作者:
Krishnan, R;Lindquist, SL
通讯作者:
Lindquist, SL
DOI:
10.1073/pnas.182276099
发表时间:
2002-09-03
影响因子:
11.1
作者:
Chen, SM;Ferrone, FA;Wetzel, R
通讯作者:
Wetzel, R
影响因子:
64.5
作者:
Glover, JR;Kowal, AS;Lindquist, S
通讯作者:
Lindquist, S