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Expression of β-1,3-Glucanase Gene in Escherichia Coli

ACKNOWLEDGEMENT第6-7页
Abstract in English第7页
Abstract in Chinese第8-14页
CHAPTER 1 INTRODUCTION第14-31页
    1.1 Overview of modern biotechnology第14-16页
        1.1.1 Gene cloning第14-16页
    1.2 Microbial enzymes第16-17页
    1.3 β-1,3-glucan第17-18页
    1.4 Negative effects of β-Glucans第18-19页
    1.5 β-1,3-glucanases第19-20页
    1.6 Structure and mechanism of action of β-1,3-glucanase第20-21页
    1.7 Applications of β-1,3-glucanases第21-22页
    1.8 Yeast β-1,3-glucan and β-1,3-glucanases第22-23页
    1.9 Cloned β-1,3-glucanase genes第23-24页
    1.10 pET Cloning system第24-27页
        1.10.1 Plasmid pET22b(+)第26-27页
        1.10.2 Advantages of using pET cloning system第27页
    1.11 Cloning and expression of recombinant proteins in Escherichia coli第27-28页
    1.12 Gel electrophoresis of DNA第28-30页
    1.13 Objective of the study第30-31页
CHAPTER 2 MATERIALS AND METHODS第31-44页
    2.1 Microorganism strains第31页
        2.1.1 Bacterial strains第31页
        2.1.2 Yeast strain第31页
    2.2 Plasmids第31-32页
        2.2.1 Vector pMD 18-T第31-32页
        2.2.2 Plasmid pET22b(+)第32页
    2.3 Media第32-34页
        2.3.1 LUFia-Berntani broth第32页
        2.3.2 Yeast Peptone Dextrose broth第32页
        2.3.4 SOB broth medium第32-33页
        2.3.5 SOC broth medium第33页
        2.3.6 Terrific broth medium第33页
        2.3.7 Solid medium第33-34页
    2.4 Reagents and Solutions第34-36页
        2.4.1 TAE(50X)buffer第34页
        2.4.2 Isopropyl-β-D-thiogalactopyranoside(IPTG)solution第34页
        2.4.3 Agarose gel第34页
        2.4.4 Calcium chloride(0.1M)solution第34页
        2.4.5 Calcium chlorde-Magnesium chlorde solution第34页
        2.4.6 Polymerase chain Reaction solutions第34页
        2.4.7 Phosphate buffer saline第34-35页
        2.4.8 Saccharine solution第35页
        2.4.9 Tris-Magnesium sulphate solution第35页
        2.4.10 Ampicillin第35页
        2.4.11 Enzymes and buffer solutions第35页
        2.4.12 Sodium acetate buffer第35页
        2.4.13 Laminarin Substrate solution第35-36页
        2.4.14 Equipment第36页
    2.5 Methods第36-44页
        2.5.1 Microorganisms growth conditions and screening procedures第36页
        2.5.2 Extraction of yeast genomic DNA第36页
        2.5.3 Storage of microorganisms strains as glycerol stocks第36-37页
        2.5.4 Designing of PCR primers第37页
        2.5.6 Performed Polymerase Chain Reaction第37页
        2.5.7 Agarose gel electrophoresis第37-38页
        2.5.8 Construction of pMD18-T-GLU plasmid第38页
        2.5.9 Construction of expression vector第38-40页
            2.5.9.1 Insert Preparation第38页
            2.5.9.2 Vector Preparation第38-39页
            2.5.9.3 Ligation第39-40页
        2.5.10 Making competent cells第40页
        2.5.11 Transformation of constructed plasmid into competent E.coli cells第40-41页
        2.5.12 Colony PCR screening of the positive recombinant第41页
        2.5.13 Analysis of the positive recombinant colonies第41页
        2.5.14 Expression of the β-1,3-glucanase gene第41-42页
        2.5.15 Preparation for IPTG induction of protein pxpression第42页
        2.5.16 Isolation of periplasmic and cytoplasmic protein fractions第42-43页
        2.5.17 Enzyme assays第43-44页
CHAPTER 3 RESULTS AND DISCUSSION第44-56页
    3.1 Extraction of yeast genomic DNA第44页
    3.2 PCR products第44-45页
    3.3 Construction of plasmid pMD18-T-GLU第45-47页
    3.4 Transformation of pET22b-GLU into JM109第47-48页
    3.5 Identification of positive colony E.coli JM109 transformants第48页
    3.6 Constructed plasmid pET22b-GLU第48-49页
    3.7 Transformation of recombinant plasmid pET22b-GLU into E.coli strain BL21(DE3)第49-50页
    3.8 Identification of the positive colony transformants of E.coli BL21(DE3)第50-51页
    3.9 Verification of the recombinant plasmid pET22b-GLU in E.coli strain BL21(DE3)第51-53页
    3.10 Nucleotide sequence analysis第53-56页
CHAPTER 4 CONCLUSION AND RECOMMENDATION第56-57页
    4.1 Conclusion第56页
    4.2 Recommendation第56-57页
REFERENCES第57-61页

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