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Optimum Extracellular Production of Recombinant Cyclodextrin Glucanotransferase from Anaerobranca Gottschalkii and Its Cyclodextrin Products

摘要第4-5页
Abstract第5-6页
CHAPTER 1 Introduction第9-19页
    1.1 Cyclodextrin glucanotransferase (CGTase)第9-11页
    1.2 Strategies for enhancing extracellular recombinant CGTase secretion in E. coli第11-13页
    1.3 Cyclodextrins (CDs)第13-14页
    1.4 Starch第14-15页
    1.5 Industrial applications of cyclodextrins第15页
    1.6 Enzymatic production of cyclodextrins第15-17页
    1.7 Objective of the study第17-18页
    1.8 The main scopes of this study第18-19页
Chapter 2 Materials and Methods第19-26页
    2.1 Chemicals第19页
    2.2 Culture media第19页
    2.3 Microorganism and plasmid第19-20页
    2.4 Transformation into E. coli第20页
    2.5 LB-agar cultivation第20页
    2.6 TB-medium cultivation第20页
    2.7 Expression of α-CGTase第20-21页
    2.8 Fermentation media第21-22页
        2.8.1 Cultivation conditions第21-22页
    2.9 Cell fractionation第22页
    2.10 Enzyme activity第22-24页
        2.10.1 Assay of α-CGTase (Cyclization reaction)第22-23页
        2.10.2 Assay of β-CGTase第23-24页
        2.10.3 Assay of γ-CGTase第24页
    2.11 Coupling reaction with and/or without organic solvent第24页
    2.12 SDS-PAGE Analysis第24-25页
    2.13 Starch liquefaction第25页
    2.14 Bioconversion第25页
    2.15 Steam distillation第25页
    2.16 Α, β and γ-CDs analysis第25-26页
CHAPTER 3 Result and Discussion第26-52页
    3.1 Construction of plasmid with secretive signal peptide and transformation into E. coli for protein production第26-27页
    3.2 Fermentation Optimization in shaking flasks第27-37页
        3.2.1 Effect of cultivation temperature第28页
        3.2.2 Effect of carbon sources第28-29页
        3.2.3 Effect of nitrogen sources第29-30页
        3.2.4 Effect of metallic ions第30-31页
        3.2.5 Effect of medium additives第31-35页
        3.2.6 Orthogonal analysis第35-37页
    3.4 Recombinant CGTase characterization第37-44页
        3.4.1 Effect of temperature and pH第37-38页
        3.4.2 Stability of the recombinant CGTase at storage第38页
        3.4.3 Bioconversion第38-44页
            3.4.3.1 Effect of substrates第38-40页
            3.4.3.2 Optimum CGTase reaction conditions in the absence/presence of organic solvents第40-41页
            3.4.3.3 Effect of organic solvents on the biochemical activity of recombinant CGTase第41-44页
    3.5 Fermentation optimization in bioreactor第44-50页
        3.5.1 Batch culture第45-46页
        3.5.2 Fed-batch culture fermentation第46-47页
        3.5.3 Effect of induction on cell growth and CGTase Production第47-48页
        3.5.4 Effect of chemical additives, Tween-80第48-49页
        3.5.5 Effect of induction temperature on cell growth and CGTase production from 3Lfermentor第49-50页
    3.6 Conclusions and expectations第50-52页
Acknowledgement第52-53页
References第53-60页
Publications第60-61页
List of abbreviations and symbols第61-62页

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