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Author: S. A. Scoggin Publisher: S. A. Scoggin ISBN: 1448627176 Category : Fiction Languages : en Pages : 412
Book Description
Graduation week should be an exciting time for the Chemistry Department of Allston University, as they prepare to move from their shabby, haunted laboratories into a brand new building. Happily oblivious, they don't know that the President of the University, a candidate for an empty Senate seat and hungry for good publicity, is scheming to trade away their building to poach a Professor of Physics on the Nobel short list. The week might turn out to be more exciting than anyone had reckoned, what with the two different infernal devices stashed in the basement and the assassination scheduled for the dedication ceremony.
Author: S. A. Scoggin Publisher: S. A. Scoggin ISBN: 1448627176 Category : Fiction Languages : en Pages : 412
Book Description
Graduation week should be an exciting time for the Chemistry Department of Allston University, as they prepare to move from their shabby, haunted laboratories into a brand new building. Happily oblivious, they don't know that the President of the University, a candidate for an empty Senate seat and hungry for good publicity, is scheming to trade away their building to poach a Professor of Physics on the Nobel short list. The week might turn out to be more exciting than anyone had reckoned, what with the two different infernal devices stashed in the basement and the assassination scheduled for the dedication ceremony.
Author: Swati Joshi Publisher: Elsevier ISBN: 0323885128 Category : Technology & Engineering Languages : en Pages : 526
Book Description
Designer Microbial Cell Factories: Metabolic Engineering and Applications, the latest release in the Current Developments in Biotechnology and Bioengineering series, provides a detailed overview of the biotechnological approaches and strategies used to generate engineered microbes and to facilitate the acceleration, modulation and diversion of metabolic pathways to get desired output such as production of value-added compound or biodegradation of xenobiotic pollutant. The book also highlights applied aspects of designer microbes in fields as diverse as agriculture, pharmaceuticals and bioremediation. Designer microbes generated through reprogramming the microbial cell factories (MCFs) provide an edge over their natural counterparts in terms of increased molecular diversity and selective chemistry. These bugs are becoming instrumental in several areas, including agriculture, environment and human health. Engineering microbes through directed evolution not only gives freedom from evolutionary constrains but also allow introduction of regulated and foreseeable functions into MCFs. Dedicated to the designing of microbes, covering state-of-the-art technological advancements in the field Includes applications of metabolic engineering in the field of agriculture, bioremediation, value-added products, therapeutics, and more Contains chapters dedicated to innovative approaches surrounding engineered microbial consortia Provides comprehensive details and helps users understand concepts
Author: Jose M. Palomo Publisher: MDPI ISBN: 3038978469 Category : Science Languages : en Pages : 154
Book Description
This Issue contains one communication, six articles, and two reviews. The communication from Paola Vitale et al. represents a work where whole cells were used as biocatalysts for the reduction of optically active chloroalkyl arylketones followed by a chemical cyclization to give the desired heterocycles. Among the various whole cells screened (baker’s yeast, Kluyveromyces marxianus CBS 6556, Saccharomyces cerevisiae CBS 7336, Lactobacillus reuteri DSM 20016), baker’s yeast provided the best yields and the highest enantiomeric ratios (95:5) in the bioreduction of the above ketones. In this respect, valuable chiral non-racemic functionalized oxygen-containing heterocycles (e.g., (S)-styrene oxide, (S)-2-phenyloxetane, (S)-2-phenyltetrahydrofuran), amenable to be further elaborated on, can be smoothly and successfully generated from their prochiral precursors. Studies about pure biocatalysts with mechanistical studies, application in different reactions, and new immobilization methods for improving their stability were reported in five different articles. The article by Su-Yan Wang et al. describes the cloning, expression, purification, and characterization of an N-acetylglucosamine 2-epimerase from Pedobacter heparinus (PhGn2E). For this, several N-acylated glucosamine derivatives were chemically synthesized and used to test the substrate specificity of the enzyme. The mechanism of the enzyme was studied by hydrogen/deuterium NMR. The study at the anomeric hydroxyl group and C-2 position of the substrate in the reaction mixture confirmed the epimerization reaction via ring-opening/enolate formation. Site-directed mutagenesis was also used to confirm the proposed mechanism of this interesting enzyme. The article by Forest H. Andrews et al. studies two enzymes, benzoylformate decarboxylase (BFDC) and pyruvate decarboxylase (PDC), which catalyze the non-oxidative decarboxylation of 2-keto acids with different specificity. BFDC from Pseudomonas putida exhibited very limited activity with pyruvate, whereas the PDCs from S. cerevisiae or from Zymomonas mobilis showed virtually no activity with benzoylformate (phenylglyoxylate). After studies using saturation mutagenesis, the BFDC T377L/A460Y variant was obtained, with 10,000-fold increase in pyruvate/benzoylformate. The change was attributed to an improvement in the Km value for pyruvate and a decrease in the kcat value for benzoylformate. The characterization of the new catalyst was performed, providing context for the observed changes in the specificity. The article by Xin Wang et al. compares two types of biocatalysts to produce D-lysine L-lysine in a cascade process catalyzed by two enzymes: racemase from microorganisms that racemize L-lysine to give D,L-lysine and decarboxylase that can be in cells, permeabilized cells, and the isolated enzyme. The comparison between the different forms demonstrated that the isolated enzyme showed the higher decarboxylase activity. Under optimal conditions, 750.7 mmol/L D-lysine was finally obtained from 1710 mmol/L L-lysine after 1 h of racemization reaction and 0.5 h of decarboxylation reaction. D-lysine yield could reach 48.8% with enantiomeric excess (ee) of 99%. In the article by Rivero and Palomo, lipase from Candida rugosa (CRL) was highly stabilized at alkaline pH in the presence of PEG, which permitted its immobilization for the first time by multipoint covalent attachment on different aldehyde-activated matrices. Different covalent immobilized preparation of the enzyme was successfully obtained. The thermal and solvent stability was highly increased by this treatment, and the novel catalysts showed high regioselectivity in the deprotection of per-O-acetylated nucleosides. The article by Robson Carlos Alnoch et al. describes the protocol and use of a new generation of tailor-made bifunctional supports activated with alkyl groups that allow the immobilization of proteins through the most hydrophobic region of the protein surface and aldehyde groups that allows the covalent immobilization of the previously adsorbed proteins. These supports were especially used in the case of lipase immobilization. The immobilization of a new metagenomic lipase (LipC12) yielded a biocatalyst 3.5-fold more active and 5000-fold more stable than the soluble enzyme. The PEGylated immobilized lipase showed high regioselectivity, producing high yields of the C-3 monodeacetylated product at pH 5.0 and 4 °C. Hybrid catalysts composed of an enzyme and metallic complex are also treated in this Special Issue. The article by Christian Herrero et al. describes the development of the Mn(TpCPP)-Xln10A artificial metalloenzyme, obtained by non-covalent insertion of Mn(III)-meso-tetrakis(p-carboxyphenyl)porphyrin [Mn(TpCPP), 1-Mn] into xylanase 10A from Streptomyces lividans (Xln10A). The complex was found able to catalyze the selective photo-induced oxidation of organic substrates in the presence of [RuII(bpy)3]2+ as a photosensitizer and [CoIII(NH3)5Cl]2+ as a sacrificial electron acceptor, using water as oxygen atom source. The two published reviews describe different subjects with interest in the fields of biocatalysis and mix metallic-biocatalysis, respectively. The review by Anika Scholtissek et al. describes the state-of-the-art regarding ene-reductases from the old yellow enzyme family (OYEs) to catalyze the asymmetric hydrogenation of activated alkenes to produce chiral products with industrial interest. The dependence of OYEs on pyridine nucleotide coenzyme can be avoided by using nicotinamide coenzyme mimetics. In the review, three main classes of OYEs are described and characterized. The review by Yajie Wang and Huimin Zhao highlights some of the recent examples in the past three years that combine transition metal catalysis with enzymatic catalysis. With recent advances in protein engineering, catalyst synthesis, artificial metalloenzymes, and supramolecular assembly, there is great potential to develop more sophisticated tandem chemoenzymatic processes for the synthesis of structurally complex chemicals. In conclusion, these nine publications give an overview of the possibilities of different catalysts, both traditional biocatalysts and hybrids with metals or organometallic complexes to be used in different processes—particularly in synthetic reactions—under very mild reaction conditions.
Author: Masayuki Inui Publisher: Springer Nature ISBN: 3030392678 Category : Science Languages : en Pages : 378
Book Description
This updated second edition covers the molecular biology, genome engineering tools and comprehensive analysis techniques for Corynebacterium glutamicum. Aside from modern omics-based approaches, the authors also focus on cell physiology, including cell division, central carbon metabolic pathways, and the respiratory chain. Readers will learn how primary mechanisms like energy metabolism can be applied in processes like biorefinery. Newly added topics include cell envelope structures and aromatic compound metabolism in C. glutamicum. These chapters will be particularly useful for those interested in the microbial production of commodity chemicals, fuels, and proteins. Corynebacteriacea are already some of the most important industrial microorganisms. Understanding the cell physiology of C. glutamicum will help manufacturers to increase their product range and productivity through efficient metabolic engineering.
Author: Tatsuo Kaneko Publisher: Springer Nature ISBN: 981994354X Category : Science Languages : en Pages : 155
Book Description
This book presents the novel concept of photo-switched biodegradation of bioplastics which is one of the important methods to overcome plastic waste issues in oceans. The different chapters discuss topics associated with a wide range of biorefinery plant cultivation, cell bioengineering in silico/wet, plastic design with photo-controlled biodegradation, photocatalysis design, evaluation of biodegradability, polymer toxicity, and plastic edibility. The book contributes to various Sustainable Development Goals such as SDG 14—Life Below Water; SDG 9—Industry, Innovation and Infrastructure; SDG 12—Responsible Consumption and Production; and SDG 15—Life on Land. It is a useful source for academic scientists in the fields of organic chemistry, photocatalysts, organic/inorganic composites, cell biology, plant biology, plastic processing, social control of wastes, environmental science, marine technology, and engineers. The book plays a big part in paradigm-changing innovation and transforms the petrochemical industry which has reached maturity, into a biochemical industry.
Author: Nicholas J Turner Publisher: Royal Society of Chemistry ISBN: 1788013425 Category : Science Languages : en Pages : 416
Book Description
The application of biocatalysis in organic synthesis is rapidly gaining popularity amongst chemists. Compared to traditional synthetic methodologies biocatalysis offers a number of advantages in terms of enhanced selectivity (chemo-, regio-, stereo-), reduced environmental impact and lower cost of starting materials. Together these advantages can contribute to more sustainable manufacturing processes across a wide range of industries ranging from pharmaceuticals to biofuels. The biocatalytic toolbox has expanded significantly in the past five years and given the current rate of development of new engineered biocatalysts it is likely that the number of available biocatalysts will double in the next few years. This textbook gives a comprehensive overview of the current biocatalytic toolbox and also establishes new guidelines or rules for “biocatalytic retrosynthesis”. Retrosynthesis is a well known and commonly used technique whereby organic chemists start with the structure of their target molecule and generate potential starting materials and intermediates through a series of retrosynthetic disconnections. These disconnections are then used to devise a forward synthesis, in this case using biocatalytic transformations in some of the key steps. Target molecules are disconnected with consideration for applying biocatalysts, as well as chemical reagents and chemocatalysts, in the forward synthesis direction. Using this textbook, students will be able to place biocatalysis within the context of other synthetic transformations that they have learned earlier in their studies. This additional awareness of biocatalysis will equip students for the modern world of organic synthesis where biocatalysts play an increasingly important role. In addition to guidelines for identifying where biocatalysts can be applied in organic synthesis, this textbook also provides examples of current applications of biocatalysis using worked examples and case studies. Tutorials enable the reader to practice disconnecting target molecules to find the ‘hidden’ biocatalytic reactions which can be applied in the synthetic direction. The book contains a complete description of the current biocatalyst classes that are available for use and also suggests areas where new enzymes are likely to be developed in the next few years. This textbook is an essential resource for lecturers and students studying synthetic organic chemistry. It also serves as a handy reference for practicing chemists who wish to embed biocatalysis into their synthetic toolbox.
Author: S. A. Scoggin
Author: S. A. Scoggin
Author: Matthew Evans
Author: Wen-Yong Lou
Author: Swati Joshi
Author: Liming Liu
Author: 
Author: Jose M. Palomo
Author: Masayuki Inui
Author: Tatsuo Kaneko
Author: Nicholas J Turner