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Cloning, expression, purification and functional characterization of non-structural protein 10 (nsp10) and RNA-dependent RNA polymerase (RdRp) of SARS coronavirus. / Cloning, expression, purification & functional characterization of non-structural protein 10 (nsp10) & RNA-dependent RNA polymerase (RdRp) of SARS coronavirus

Ho Hei Ming. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2006. / Includes bibliographical references (leaves 189-199). / Abstracts in English and Chinese. / Chapter Chapter 1 --- Introduction / Chapter 1.1 --- Epidemiology of the Severe Acute Respiratory Syndrome (SARS) Outbreak --- p.2 / Chapter 1.2 --- The SARS Coronavirus --- p.3 / Chapter 1.2.1 --- Genome organization --- p.7 / Chapter 1.2.2 --- Structural proteins --- p.9 / Chapter 1.2.3 --- Non-structural proteins --- p.11 / Chapter 1.3 --- Introduction to SARS-CoV nsp10 Protein --- p.14 / Chapter 1.4 --- Introduction to SARS-CoV RNA-dependent RNA Polymerase (RdRp) Protein --- p.17 / Chapter 1.5 --- Objectives of the Present Study --- p.25 / Chapter Chapter 2 --- Materials and Methods / Chapter 2.1 --- Construction of Glutathione S-Transferase (GST) Fusion/Green Fluorescence Protein (GFP) N1 and C1 Fusion nsplO --- p.26 / Chapter 2.1.1 --- Primer design --- p.26 / Chapter 2.1.2 --- Gene amplification by PCR --- p.28 / Chapter 2.1.3 --- Purification of PCR product --- p.30 / Chapter 2.1.4 --- Enzyme restriction --- p.31 / Chapter 2.1.5 --- Ligation --- p.33 / Chapter 2.1.6 --- Transformation --- p.34 / Chapter 2.1.6.1 --- Preparation of competent cell DH5α --- p.34 / Chapter 2.1.7 --- Mini scale plasmid preparation --- p.36 / Chapter 2.2 --- Subcellular Localization Study --- p.39 / Chapter 2.2.1 --- Midi scale plasmid preparation --- p.39 / Chapter 2.2.2 --- Transfection of GFP recombinant plasmids --- p.41 / Chapter 2.2.2.1 --- Cell culture of Vero E6 cell line --- p.41 / Chapter 2.2.2.2 --- Lipofectamine based transfection --- p.41 / Chapter 2.2.3 --- Fluorescent microscopic visualization --- p.42 / Chapter 2.2.4 --- Western blotting for GFP fusion protein expression --- p.43 / Chapter 2.2.4.1 --- Protein extraction --- p.43 / Chapter 2.2.4.2 --- Protein quantification --- p.44 / Chapter 2.2.3.4 --- SDS-PAGE analysis --- p.45 / Chapter 2.3 --- "Expression of GFP-nsp10 in Vero E6 cells, SARS-CoV Infected Vero E6 Cells and Convalescent Patients' Serum" --- p.47 / Chapter 2.3.1 --- Cell-based immunostaining of VeroE6 cells and SARS-CoV infected Vero E6 cells --- p.47 / Chapter 2.3.1.1 --- Immobilization of Vero E6 cells and SARS-CoV infected Vero E6 cells --- p.47 / Chapter 2.3.1.2 --- Preparation of monoclonal antibodies against SARS-CoV nsp10 --- p.48 / Chapter 2.3.1.3 --- Immunostaining of SARS-CoV nsp10 in Vero E6 cells and SARS-CoV VeroE6 cells --- p.48 / Chapter 2.3.1.4 --- Fluorescent microscopic visualization --- p.49 / Chapter 2.3.2 --- Detection of SARS-CoV nsplO expression in SARS-CoV infected convalescent patients' serum --- p.50 / Chapter 2.3.2.1 --- Western blotting of SARS-CoV nsp10 by SARS-CoV infected convalescent patients' serum --- p.50 / Chapter 2.4 --- Expression of GST fusion SARS-CoV nsp10 in E.coli --- p.51 / Chapter 2.4.1 --- Preparation of competent cells --- p.51 / Chapter 2.4.2 --- Small scale expression --- p.51 / Chapter 2.4.3 --- Large scale expression of GST-nsp10 in optimized conditions --- p.54 / Chapter 2.5 --- Purification of GST fusion SARS-CoV nsp10 --- p.55 / Chapter 2.5.1 --- Glutathione Sepharose 4B affinity chromatography --- p.55 / Chapter 2.5.2 --- Superdex 75 gel filtration chromatography --- p.56 / Chapter 2.6 --- "CD Measurement, NMR and Crystallization Study of SARS-CoV nsp10" --- p.57 / Chapter 2.6.1 --- CD measurement --- p.57 / Chapter 2.6.2 --- NMR spectroscopy --- p.58 / Chapter 2.6.3 --- Crystallization of nsp10 --- p.58 / Chapter 2.7 --- "Glutathione-S-Sepharose Pull-down assay, 2D Gel Electrophoresis and Mass Spectrometry" --- p.59 / Chapter 2.7.1 --- GST pull-down assay --- p.59 / Chapter 2.7.2 --- Two-dimension gel electrophoresis --- p.59 / Chapter 2.7.2.1 --- First dimensional isoelectric focusing (IEF) --- p.59 / Chapter 2.7.2.2 --- Second dimension SDS-PAGE --- p.60 / Chapter 2.7.2.3 --- Silver staining --- p.61 / Chapter 2.7.3 --- Protein identification by mass spectrometry --- p.63 / Chapter 2.7.3.1 --- Data acquisition --- p.65 / Chapter 2.8 --- Proliferative study of SARS-CoV nsp10 in VeroE6 Cell Line and Mouse Splenocytes --- p.66 / Chapter 2.8.1 --- Assay of mitogenic activity by 3H-thymidine incorporation --- p.66 / Chapter 2.9 --- "Cloning, Expression and Purification of GST fusion SARS-CoV RNA-dependent RNA Polymerase (RdRp) Full- length Protein" --- p.67 / Chapter 2.9.1 --- Construction of GST-RdRp-full length expression plasmid --- p.67 / Chapter 2.9.2 --- Expression and purification of GST-RdRp full-length protein --- p.68 / Chapter 2.10 --- "Cloning, Expression and Purification of GST Fusion SARS-CoV RNA-dependent RNA Polymerase (RdRp) Catalytic Domain" --- p.70 / Chapter 2.10.1 --- Construction of GST-RdRp Catalytic Domain (p64) and MBP-RdRp-p64 expression plasmids --- p.70 / Chapter 2.10.2 --- Expression and purification of GST fusion catalytic domain of SARS-CoV RdRp (GST-p64) --- p.71 / Chapter 2.10.3 --- Expression and purification of MBP fusion catalytic domain of SARS-CoV RdRp --- p.72 / Chapter 2.11 --- "Cloning, Expression and Purification of the His-thioredoxin Fusion N-terminal Domain of SARS-CoV RdRp (pET32h-pl2)" --- p.74 / Chapter 2.11.1 --- Construction of His-thioredoxin fusion N-terminal domain of SARS-CoV RdRp (pET32h-pl2) expression plasmid --- p.74 / Chapter 2.11.2 --- Expression and purification of His- thioredoxin fusion N-terminal domain of SARS-CoV RdRp (pET32h-pl2) --- p.74 / Chapter 2.12 --- Interaction Study of RdRp Catalytic Domain and N-terminal Domain --- p.76 / Chapter 2.13 --- Electrophoretic Mobility Shift Assay of SARS-CoV Genomic RNA Strands with RdRp Full-length sequence --- p.76 / Chapter 2.13.1 --- Preparation of RNA transcripts --- p.76 / Chapter 2.13.2 --- EMSA --- p.77 / Chapter 2.14 --- Non-radiometric and Radiometric RdRp Assays --- p.78 / Chapter 2.14.1 --- Non-radiometric RdRp assay--luciferase coupled enzyme assay --- p.78 / Chapter 2.14.2 --- Radiometric RdRp assay ´ؤ filter-binding enzyme assay --- p.79 / Chapter 2.15 --- Western Blot Analysis for Interaction Study --- p.80 / Chapter Chapter 3 --- Results and Discussion on SARS-CoV nsplO --- p.81 / Chapter 3.1 --- "Cloning, Expression and Purification of SARS-CoV nsp10 in Prokaryotic Expression System" --- p.81 / Chapter 3.1.1 --- Cloning and expression of SARS-CoV nsp 10 --- p.81 / Chapter 3.1.2 --- Purification of GST-nsp10 by GST affinity chromatography --- p.84 / Chapter 3.1.3 --- Purification of nsp10 by size exclusion chromatography --- p.85 / Chapter 3.1.4. --- "Yield, purity and stability of SARS-CoV nsp 10" --- p.88 / Chapter 3.2 --- SARS-CoV nsp10 Sequence Alignment and Protein Structure Prediction --- p.89 / Chapter 3.2.1. --- Sequence alignment of SAR-CoV nsp10 with known viral proteins --- p.91 / Chapter 3.2.2 --- Protein structure prediction - homology modeling --- p.93 / Chapter 3.3 --- Circular Dichroism Analysis of nsp10 --- p.96 / Chapter 3.3.1 --- CD spectrum of SARS-CoV nsp10 --- p.98 / Chapter 3.3.2. --- Effect of divalent metal ions on SARS-CoV nsp10 --- p.99 / Chapter 3.4 --- Nuclear Magnetic Resonance Analysis of nsp10 --- p.101 / Chapter 3.4.1 --- Sample preparation for NMR Experiment --- p.102 / Chapter 3.4.2 --- Protein structure determination by NMR --- p.103 / Chapter 3.5 --- Crystallization of SARS-CoV nsp10 --- p.105 / Chapter 3.5.1 --- Sample preparation of nsp10 for crystallization --- p.105 / Chapter 3.5.2 --- Screening conditions for crystallization --- p.106 / Chapter 3.6 --- "Antigenic, Immunofluorescene and Subcellular Localization Studies on the SARS-CoV nsp10" --- p.110 / Chapter 3.6.1 --- Antigenic and immunofluorescene studies on the SARS-CoV nsp10 --- p.110 / Chapter 3.6.2 --- Subcellular localization of SARS-CoV nsp10 --- p.115 / Chapter 3.7 --- Proliferative Study of nsp10 --- p.120 / Chapter 3.7.1. --- Influence of proliferative effect on the host cell --- p.121 / Chapter 3.8 --- A Proteomics Strategy for Interaction Study of nsp10 --- p.124 / Chapter 3.8.1 --- 2D SDS-PAGE analysis of proteins associating with the nsp10 bait --- p.125 / Chapter 3.8.2 --- Silver staining of proteins associating with the nsp10 bait and their identification by mass spectrometry --- p.127 / Chapter 3.9 --- Discussion on SARS-CoV nsp10 --- p.129 / Chapter Chapter 4 --- Results and Discussion on SARS-CoV RdRp / Chapter 4.1 --- "Cloning, Expression and Purification of SARS-CoV RdRp Full-length, Catalytic Domain and N-terminal Domain" --- p.139 / Chapter 4.2 --- Interaction Study of RdRp Catalytic Domain and its N-terminal Domain --- p.147 / Chapter 4.3 --- Functional Analysis of RNA Binding by the SARS-CoV RdRp --- p.149 / Chapter 4.4 --- Characterization of RdRp by Non-radioactive RdRp Assay ´ؤ Luciferase-coupled Enzyme Assay --- p.152 / Chapter 4.5 --- Characterization of RdRp by Radioactive RdRp Assay ´ؤ 32P Incorporation Assay --- p.157 / Chapter 4.6 --- Discussion on SARS-CoV RdRp --- p.161 / Chapter Chapter 5 --- General Discussion / General Discussion --- p.170 / Appendix --- p.172 / References --- p.189

Identiferoai:union.ndltd.org:cuhk.edu.hk/oai:cuhk-dr:cuhk_325682
Date January 2006
ContributorsHo, Hei Ming., Chinese University of Hong Kong Graduate School. Division of Biochemistry.
Source SetsThe Chinese University of Hong Kong
LanguageEnglish, Chinese
Detected LanguageEnglish
TypeText, bibliography
Formatprint, xx, 199 leaves : ill. (some col.) ; 30 cm.
RightsUse of this resource is governed by the terms and conditions of the Creative Commons “Attribution-NonCommercial-NoDerivatives 4.0 International” License (http://creativecommons.org/licenses/by-nc-nd/4.0/)

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