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食碱戈登氏菌YC-RL2降解邻苯二甲酸酯的分子机制

摘要第6-7页
abstract第7-8页
List of Abbreviations第15-17页
Chapter1:General Introduction第17-21页
    1.1 Background第17-18页
    1.2 Problem statement第18-19页
    1.3 Justification of the study第19-20页
    1.4 General objective第20页
    1.5 Specific objectives第20-21页
Chapter2:Literature review第21-35页
    2.1 Occurrence of PAEs第21-27页
        2.1.1 Surface waters and sediments第21-22页
        2.1.2 Occurrence in Air第22-23页
        2.1.3 Agricultural soils第23-25页
        2.1.4 Wastewater treatment plants and sludge第25页
        2.1.5 Occurrence in landfills第25-26页
        2.1.6 Food,beverages and personal care products第26-27页
    2.2 Eco-toxicological effects of PAEs第27-29页
        2.2.1 Effect of PAEs on soil properties and crops第27页
        2.2.2 Effect on aquatic organisms第27-28页
        2.2.3 Effects on terrestrial organisms第28页
        2.2.4 Effect on humans第28-29页
    2.3 Microbial removal of PAEs第29-35页
        2.3.1 PAEs biodegradation pathways in bacteria第30-32页
        2.3.2 Role of genus Gordonia in degradation of PAEs第32-35页
Chapter3:Genome sequencing,annotation and comparative analysis of strain YC-RL第35-66页
    3.1 Introduction第35-36页
    3.2 Materials and methods第36-38页
        3.2.1 Chemicals and media第36页
        3.2.2 Substrate utilization tests and intermediate analysis第36页
        3.2.3 DNA extraction,genome library preparation and sequencing第36-37页
        3.2.4 Phylogenetic and comparative genomic analysis第37页
        3.2.5 Prediction of secondary metabolite potential第37页
        3.2.6 Heavy metal tolerance tests第37-38页
        3.2.7 Accession numbers第38页
    3.3 Results第38-62页
        3.3.1 Genome sequence and annotation results第38-39页
        3.3.2 Classification第39-41页
        3.3.3 COG analysis and KEGG analysis第41-44页
        3.3.4 Analysis of phthalate catabolic genes第44-54页
        3.3.5 Secondary metabolite biosynthesis potential第54-56页
        3.3.6 Heavy metal resistance第56-59页
        3.3.7 Genetic basis for colony morphology changes第59-62页
    3.4 Discussion第62-65页
    3.5 Conclusion第65-66页
Chapter4:Cloning and expression of a novel carboxylesterase Car259 capable of hydrolyzing Di-2-ethylhexyl phthalate第66-94页
    4.1 Introduction第66-67页
    4.2 Materials and methods第67-70页
        4.2.1 Chemicals and reagents第67页
        4.2.2 Cloning,expression and purification of Car第67-68页
        4.2.3 Enzyme assay第68-69页
        4.2.4 Substrate specificity第69页
        4.2.5 Detection of degradation intermediates第69页
        4.2.6 Homology modeling and model verification第69-70页
        4.2.7 Protein-ligand docking and visualization第70页
        4.2.8 Construction of mutants第70页
    4.3 Results第70-90页
        4.3.1 Expression and purification of Car第70-73页
        4.3.2 Multiple sequence alignment and phylogenetic analysis第73-77页
        4.3.3 Effect of pH,temperature,ions,solvents and detergents on Car259 activity第77-79页
        4.3.4 Substrate specificity第79-83页
        4.3.5 Enzyme Kinetic parameters第83页
        4.3.6 Degradation intermediates第83-84页
        4.3.7 Homology modeling and docking results第84-90页
    4.4 Discussion第90-92页
    4.5 Conclusion第92-94页
Chapter5:Biochemical and structural characterization of a monoethylhexyl phthalate hydrolase(MehpH)第94-108页
    5.1 Introduction第94-95页
    5.2 Materials and methods第95-97页
        5.2.1 Chemicals,solutions and media第95页
        5.2.2 Protein purification第95页
        5.2.3 Enzyme activity assays第95-96页
        5.2.4 Enzyme structure modeling第96-97页
    5.3 Results第97-105页
        5.3.1 Protein purification第97-98页
        5.3.2 Enzyme activity assays第98-101页
        5.3.3 Enzyme structure modeling第101-105页
    5.4 Discussion第105-107页
    5.5 Conclusion第107-108页
Chapter6:General conclusions and recommendations第108-110页
    6.1 Conclusions第108-109页
    6.2 Recommendations第109-110页
References第110-132页
Acknowledgements第132-133页
Author’s Resume第133-137页

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