Practical Biotransformations: A Beginner's Guide

ISBN-13: 9781405171250 / Angielski / Miękka / 2009 / 344 str.

Gideon Grogan

Opis

The development of new asymmetric catalytic methods is of fundamental importance to industrial synthetic chemistry. The demand for optically pure synthetic intermediates and the drive to adopt greener methods of synthesis have stimulated a growing interest in biocatalysis as a selective and environmentally benign synthetic technique. Practical Biotransformations: A Beginner's Guide provides an introduction to microbes and enzymes and demonstrates their practical applications in synthetic organic chemistry. Designed as a laboratory manual, this user-friendly guide discusses standard laboratory techniques, with appropriate advice on aspects of microbial practice and associated safety. Topics covered include:

• An introduction to equipment in a biotransformations laboratory
• An overview of biocatalyst sources
• Maintenance and growth of biocatalysts
• Example biotransformations using commercially available microbes and enzymes
• Basic gene cloning and the use of 'designer' biocatalysts

This book will be a valuable resource for synthetic organic chemists with little or no experience of biochemistry or microbiology. It is the author's hope that this text will inspire readers to consider biocatalytic methods as real alternatives to traditional synthetic solutions.

Recenzje

?The book provides a good overview and appropriately conceived outline of this complex topic, enabling the interested reader to begin work with enzymes quickly and without unnecessary complications.? (Angewandte Chemie, October 2009)

?Gogan presents a beginner′s guide to microbes and enzymes and how to use them for synthetic organic reactions in the laboratory.? ( Book News, September 2009)

?This book is easy to read and well organized and can be dipped in and out of, depending on your level of experience in different areas. ? Overall and excellent, interesting and user–friendly manual/textbook.? (Chemistry World, August 2009)

Spis treści

Chapter 1: Biotransformations, Microbes and Enzymes.

1.1 Introduction.

1.2 Biotransformations.

1.3 Microorganisms.

1.4 Organism nomenclature.

1.5 Enzymes.

1.6 Types of Enzymatic reactions.

1.7 Enzymatic Cofactors.

1.8 Some Basic Characteristics of Enzyme Catalysis.

1.9 Types of Biocatalyst – Biotransformations by whole cells or isolated enzymes.

1.10. Conclusion.

Chapter 2: An overview of biocatalyst sources and web–based information.

2.1 Introduction.

2.2 Microbial culture collections.

2.3 Obtaining organisms from other research groups.

2.4 Selective Enrichments.

2.5 Metagenomics.

2.6 Enzyme Suppliers and Biocatalyst Development Companies.

2.7 Genome mining for biocatalysts.

2.8 Obtaining amino acid and gene sequence information on biocatalysts.

2.9 Obtaining DNA templates for cloning.

2.10 Custom Gene Synthesis.

2.11 Other interesting web resources for biocatalysis.

2.12 Conclusion.

Chapter 3: Setting up a laboratory for biotransformations.

3.1 Introduction.

3.2 Microbiological Containment.

3.3 On containment issues and genetically–modified organisms.

3.4 Equipment for handling microorganisms.

3.5 Techniques and terms in microbiology – Sterility, Asepsis and Aseptic Technique.

3.6 Disposal of viable microbial waste and disinfection of reusable equipment.

3.7 Equipment for enzymology and molecular biology.

3.8 General reagents and chemicals in a Biotransformations Laboratory.

3.9 Conclusion.

Chapter 4: A beginner s guide to preparative whole–cell microbial biotransformations.

4.1 Introduction.

4.2 Storage, maintenance and growth of microorganisms.

4.3 General Microbiological Methods.

4.4 Examples of Whole–cell Biotransformations using Bacteria.

4.5 Biotransformation by filamentous fungi and yeasts.

4.6 Whole–cell Biotransformations by recombinant strains of E. coli.

4.7 Conclusion.

Chapter 5: A beginner s guide to biotransformations by commercially available isolated enzymes.

5.1 Introduction.

5.2 Lipases.

5.3 Hydrolytic Reactions using lipases.

5.4 Using lipases for acylation reactions.

5.5 Other hydrolases.

5.6 Commercially available Coenzyme–dependent Enzymes.

5.7 Carbon–carbon bond forming reactions.

5.8 Conclusion.

Chapter 6: A beginner s guide to the isolation and analysis and use of home–grown enzyme biocatalysts.

6.1 Introduction.

6.2 Cell growth and harvesting.

6.3 Cell disruption.

6.4 A typical procedure for making a cell extract from a recombinant strain of E. coli.

6.5 Purification of enzymes – a brief guide.

6.6 Techniques for Protein Purification.

6.7 Isolation of recombinant enzymes using histidine tags.

6.8 Estimation of protein concentration.

6.9 Concentrating protein samples by centrifugation.

6.10 Analysis of protein samples by sodium dodecylsulfate polyacrylamide gel electrophoresis (SDS–PAGE).

6.11 Examples of enzyme assays.

6.12 Using home–grown enzymes for biotransformations ? Some recent examples.

6.13 Conclusion.

Chapter 7: An introduction to basic gene cloning for the production of designer biocatalysts.

7.1 Introduction.

7.2 Background to gene cloning.

7.3 Gene amplification by polymerase chain reaction (PCR).

7.4 DNA fragment analysis by agarose electrophoresis.

7.5 Gene cloning.

7.6 Analysis by DNA sequencing.

7.7 Troubleshooting the gene amplification and cloning process.

7.8 Ligation–Independent Cloning.

7.9 Gene Expression in E. coli.

7.10 Conclusion.

Chapter 8: Engineering Enzymes.

8.1 Introduction.

8.2 Site–directed or targted mutagenesis as a tool for investigating enzyme mechanism or altering catalytic attributes.

8.3 A site–directed mutagenesis experiment. Considerations and practise.

8.4 Engineering using random mutagenesis. Directed Evolution of Enzymes.

8.5 Combining rational and random mutagenesis for biocatalyst improvement.

8.6 Exploiting catalytic promiscuity for creating new enzyme activities.

8.7 Designing enzymes in silico.

8.8 Conclusion.

Appendices.

1. Structures of the proteinogenic amino acids.

2. Structures of bases found in nucleic acids.

3. The Genetic Code.

4. Recipes for Microbiological Growth Media.

5. Biological buffers.

6. Ammonium sulphate fractionation table.

7. Restriction enzymes and restriction sites.

O autorze

Gideon Grogan is a lecturer at the University of York, Department of Chemistry. He is also Science Manager of the Bioscience for Business Knowledge Transfer Network (a UK DTI–funded organisation for biocatalysis collaborations between academe and industry) and Deputy Director of the Centre of Excellence for Biocatalysis, Biotransformation and Biomanufacture (at York).

Blurb

Biotransformations are reactions catalysed by either enzymes or microbes which are of potential use to preparative synthetic chemistry. Biotransformation science can include microbiological and biochemical techniques with which the organic chemist is unfamiliar, yet this should not be a barrier to the uptake of these processes, the use of which can result in significant research and economic benefits.

The book is aimed at organic chemistry postgraduates and researchers in both academia and industry who are aware of the existence of biotransformation methodology, and of its potential value, but do not know how to begin to implement the relevant experimental techniques in the laboratory. It is written in an accessible and user–friendly way that should facilitate the introduction of biocatalysis in to some new labs.