Enzymatic activity characterization of SARS coronavirus 3C-like protease by fluorescence resonance energy transfer technique.
Enzymatic activity characterization of SARS coronavirus 3C-like protease by fluorescence resonance energy transfer technique.
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通过荧光共振能量转移技术对SARS冠状病毒3C样蛋白酶的酶促活性表征。
DOI:
10.1111/j.1745-7254.2005.00010.x
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发表时间:
2005-01
影响因子:
8.2
通讯作者:
Jiang HL
中科院分区:
文献类型:
--
作者:
Chen S;Chen LL;Luo HB;Sun T;Chen J;Ye F;Cai JH;Shen JK;Shen X;Jiang HL
To characterize enzymatic activity of severe acute respiratory syndrome (SARS) coronavirus (CoV) 3C-like protease (3CLpro) and its four site-directed mutants. Based on the fluorescence resonance energy transfer (FRET) principle using 5-[(2′-aminoethyl)-amino] naphthelenesulfonic acid (EDANS) and 4-[[4-(dimethylamino) phenyl] azo] benzoic acid (Dabcyl) as the energy transfer pair, one fluorogenic substrate was designed for the evaluation of SARS-CoV 3CLpro proteolytic activity. The kinetic parameters of the fluorogenic substrate have been determined as Km=404 μmol·L−1, kcat=1.08 min−1, and kcat/Km=2.7 mmol−1·L·min−1. SARS-CoV 3CLpro showed substantial pH and temperature-triggered activity switches, and site-directed mutagenesis analysis of SARS-CoV 3CLpro revealed that substitutions of His41, Cys145, and His163 resulted in complete loss of enzymatic activity, while replacement of Met162 with Ala caused strongly increased activity. This present work has provided valuable information for understanding the catalytic mechanism of SARS-CoV 3CLpro. This FRET-based assay might supply an ideal approach for the exploration SARS-CoV 3CLpro putative inhibitors.
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影响因子:
14.9
作者:
Gorbalenya AE;Koonin EV;Donchenko AP;Blinov VM
通讯作者:
Blinov VM
影响因子:
11.4
作者:
Anand, Kanchan;Palm, Gottfried J;Mesters, Jeroen R;Siddell, Stuart G;Ziebuhr, John;Hilgenfeld, Rolf
通讯作者:
Hilgenfeld, Rolf
DOI:
10.1016/s0140-6736(03)13077-2
发表时间:
2003-04-19
期刊:
Lancet (London, England)
影响因子:
--
作者:
Peiris JS;Lai ST;Poon LL;Guan Y;Yam LY;Lim W;Nicholls J;Yee WK;Yan WW;Cheung MT;Cheng VC;Chan KH;Tsang DN;Yung RW;Ng TK;Yuen KY;SARS study group
通讯作者:
SARS study group
DOI:
10.1074/jbc.m310875200
发表时间:
2004-01-16
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Fan K;Wei P;Feng Q;Chen S;Huang C;Ma L;Lai B;Pei J;Liu Y;Chen J;Lai L
通讯作者:
Lai L
影响因子:
3.8
作者:
Hegyi, A;Ziebuhr, J
通讯作者:
Ziebuhr, J