The mechanism of prion inhibition by HET-S.
The mechanism of prion inhibition by HET-S.
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DOI:
10.1016/j.molcel.2010.05.019
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发表时间:
2010-06-25
期刊:
影响因子:
16
通讯作者:
Riek R
中科院分区:
文献类型:
--
作者:
Greenwald J;Buhtz C;Ritter C;Kwiatkowski W;Choe S;Maddelein ML;Ness F;Cescau S;Soragni A;Leitz D;Saupe SJ;Riek R
HET-S (97% identical to HET-s) has an N-terminal globular domain that exerts a prion-inhibitory effect in cis on its own prion-forming domain (PFD) and in trans on HET-s prion propagation. We show that HET-S fails to form fibrils in vitro and that it inhibits HET-s PFD fibrillization in trans. In vivo analyses indicate that β-structuring of the HET-S PFD is required for HET-S activity. The crystal structures of the globular domains of HET-s and HET-S are highly similar, comprising a helical fold, while NMR-based characterizations revealed no differences in the conformations of the PFDs. We conclude that prion inhibition is not encoded by structure but rather in stability and oligomerization properties: when HET-S forms a prion seed or is incorporated into a HET-s fibril via its PFD, the β-structuring in this domain induces a change in its globular domain, generating a molecular species that is incompetent for fibril growth.
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影响因子:
11.4
作者:
Fernandez-Bellot, E;Guillemet, E;Cullin, C
通讯作者:
Cullin, C
影响因子:
56.9
作者:
MASISON, DC;WICKNER, RB
通讯作者:
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影响因子:
4
作者:
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影响因子:
3.6
作者:
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通讯作者:
Saupe, SJ
DOI:
10.1073/pnas.252652099
发表时间:
2002-12-10
影响因子:
11.1
作者:
Liu, JJ;Sondheimer, N;Lindquist, SL
通讯作者:
Lindquist, SL