國家衛生研究院 NHRI:Item 3990099045/1233

NHRI > Institute of Biotechnology and Pharmaceutical Research > Xin Chen(2002-2015) > Periodical Articles > Item 3990099045/1233

Please use this identifier to cite or link to this item: http://ir.nhri.org.tw/handle/3990099045/1233

Title:	Papain-like protease 2 (PLP2) from severe acute respiratory syndrome coronavirus (SARS-CoV): Expression, purification, characterization, and inhibition
Authors:	Han, YS;Chang, GG;Juo, CG;Lee, HJ;Yeh, SH;Hsu, JTA;Chen, X
Contributors:	Division of Biotechnology and Pharmaceutical Research
Abstract:	Viral proteases are essential for pathogenesis and virulence of severe acute respiratory syndrome coronavirus (SARS-CoV). Little information is available on SARS-CoV papain-like protease 2 (PLP2), and development of inhibitors against PLP2 is attractive for antiviral therapy. Here, we report the characterization of SARS-CoV PLP2 (from residues 1414 to 1858) purified from baculovirus-infected insect cells. We demonstrate that SARS-CoV PLP2 by itself differentially cleaves between the amino acids Gly180 and Ala181, Gly818 and Ala819, and Gly2740 and Lys2741 of the viral polypeptide pp1a, as determined by reversed-phase high-performance liquid chromatography analysis coupled with mass spectrometry. This protease is especially selective for the P1, P4, and P6 sites of the substrate. The study demonstrates, for the first time among coronaviral PLPs, that the reaction mechanism of SARS-CoV PLP2 is characteristic of papain and compatible with the involvement of the catalytic dyad (Cys)-S-/ (His)-Im(+)H ion pair. With a fluorogenic inhibitor-screening platform, we show that zinc ion and its conjugates potently inhibit the enzymatic activity of SARS-CoV PLP2. In addition, we provided evidence for evolutionary reclassification of SARS-CoV. The results provide important insights into the biochemical properties of the coronaviral PLP family and a promising therapeutic way to fight SARS-CoV.
Keywords:	Biochemistry & Molecular Biology
Date:	2005-08-02
Relation:	Biochemistry. 2005 Aug;44(30):10349-10359.
Link to:	http://dx.doi.org/10.1021/bi0504761
JIF/Ranking 2023:	http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=NHRI&SrcApp=NHRI_IR&KeyISSN=0006-2960&DestApp=IC2JCR
Cited Times(WOS):	https://www.webofscience.com/wos/woscc/full-record/WOS:000230879900040
Cited Times(Scopus):	http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=23044490251
Appears in Collections:	[Xin Chen(2002-2015)] Periodical Articles [John Tsu-An Hsu] Periodical Articles

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