Selectivity in ISG15 and ubiquitin recognition by the SARS coronavirus papain-like protease.
Selectivity in ISG15 and ubiquitin recognition by the SARS coronavirus papain-like protease.
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SARS冠状病毒蛋白酶样蛋白酶的ISG15和泛素识别的选择性。
DOI:
10.1016/j.abb.2007.07.006
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发表时间:
2007-10-01
影响因子:
3.9
通讯作者:
Ménard R
中科院分区:
文献类型:
--
作者:
Lindner HA;Lytvyn V;Qi H;Lachance P;Ziomek E;Ménard R
The severe acute respiratory syndrome coronavirus papain-like protease (SARS-CoV PLpro) carries out N-terminal processing of the viral replicase polyprotein, and also exhibits Lys48-linked polyubiquitin chain debranching and ISG15 precursor processing activities in vitro. Here, we used SDS–PAGE and fluorescence-based assays to demonstrate that ISG15 derivatives are the preferred substrates for the deubiquitinating activity of the PLpro. With kcat/KM of 602,000 M−1 s−1, PLpro hydrolyzes ISG15-AMC 30- and 60-fold more efficiently than Ub-AMC and Nedd8-AMC, respectively. Data obtained with truncated ISG15 and hybrid Ub/ISG15 substrates indicate that both the N- and C-terminal Ub-like domains of ISG15 contribute to this preference. The enzyme also displays a preference for debranching Lys48- over Lys63-linked polyubiquitin chains. Our results demonstrate that SARS-CoV PLpro can differentiate between ubiquitin-like modifiers sharing a common C-terminal sequence, and that the debranching activity of the PLpro is linkage type selective. The potential structural basis for the demonstrated specificity of SARS-CoV PLpro is discussed.
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影响因子:
5.4
作者:
Lindner, HA;Fotouhi-Ardakani, N;Ménard, R
通讯作者:
Ménard, R
影响因子:
--
作者:
Ziebuhr J
通讯作者:
Ziebuhr J
影响因子:
5.4
作者:
Harcourt, BH;Jukneliene, D;Baker, SC
通讯作者:
Baker, SC
影响因子:
2.9
作者:
Sulea, T;Lindner, HA;Ménard, R
通讯作者:
Ménard, R
影响因子:
5.4
作者:
Ziebuhr, John;Schelle, Barbara;Thiel, Volker
通讯作者:
Thiel, Volker