Asymmetric and Selective Biocatalysis
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												  – with Novozymes Enzymes for BiocatalysisBiocatalysis Pregabalin case study Smarter chemical synthesis – with Novozymes enzymes for biocatalysis The new biocatalytic route results in process improvements, reduced organic solvent usage and substantial reduction of waste streams in Pregabalin production. Introduction Biocatalysis is the application of enzymes to replace chemical Using Lipolase®, a commercially available lipase, rac-2- catalysts in synthetic processes. In recent past, the use of carboxyethyl-3-cyano-5-methylhexanoic acid ethyl ester biocatalysis has gained momentum in the chemical and (1) can be resolved to form (S)-2-carboxyethyl-3-cyano-5- pharmaceutical industries. Today, it’s an important tool for methylhexanoic acid (2). Compared to the first-generation medicinal, process and polymer chemists to develop efficient process, this new route substantially improves process and highly attractive organic synthetic processes on an efficiency by setting the stereocenter early in the synthesis and industrial scale. enabling the facile racemization and reuse of (R)-1. The biocatalytic process for Pregabalin has been developed It outperforms the first-generation manufacturing process also by Pfizer to boost efficiency in Pregabalin production using by delivering higher yields of Pregabalin and by resulting in Novozymes Lipolase®. substantial reductions of waste streams, corresponding to a 5-fold decrease in the E-Factor from 86 to 17. Development of the biocatalytic process for Pregabalin involves four stages: • Screening to identify a suitable enzyme • Performing optimization of the enzymatic reaction to optimize throughput and reduce enzyme loading • Exploring a chemical pathway to preserve the enantiopurity of the material already obtained and lead to Pregabalin, and • Developing a procedure for the racemization of (R)-1 Process improvements thanks to the biocatalytic route Pregabalin chemical synthesis H Knovenagel CN condensation cyanation KOH 0 Et02C CO2Et Et02C CO2Et Et02C CO2Et CNDE (1) CN NH2 1.
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												  Screening of Macromolecular Cross-Linkers and Food-Grade Additives for Enhancement of Catalytic Performance of MNP-CLEA-Lipase of Hevea BrasiliensisIOP Conference Series: Materials Science and Engineering PAPER • OPEN ACCESS Screening of macromolecular cross-linkers and food-grade additives for enhancement of catalytic performance of MNP-CLEA-lipase of hevea brasiliensis To cite this article: Nur Amalin Ab Aziz Al Safi and Faridah Yusof 2020 IOP Conf. Ser.: Mater. Sci. Eng. 932 012019 View the article online for updates and enhancements. This content was downloaded from IP address 170.106.202.226 on 23/09/2021 at 18:45 1st International Conference on Science, Engineering and Technology (ICSET) 2020 IOP Publishing IOP Conf. Series: Materials Science and Engineering 932 (2020) 012019 doi:10.1088/1757-899X/932/1/012019 Screening of macromolecular cross-linkers and food-grade additives for enhancement of catalytic performance of MNP- CLEA-lipase of hevea brasiliensis. Nur Amalin Ab Aziz Al Safi1 and Faridah Yusof1 1 Department of Biotechnology Engineering, International Islamic University Malaysia. Abstract. Skim latex from Hevea brasiliensis (rubber tree) consist of many useful proteins and enzymes that can be utilized to produce value added products for industrial purposes. Lipase recovered from skim latex serum was immobilized via cross-linked enzyme aggregates (CLEA) technology, while supported by magnetic nanoparticles for properties enhancement, termed ‘Magnetic Nanoparticles CLEA-lipase’ (MNP-CLEA-lipase). MNP-CLEA-lipase was prepared by chemical cross-linking of enzyme aggregates with amino functionalized magnetic nanoparticles. Instead of using glutaraldehyde as cross-linking agent, green, non-toxic and renewable macromolecular cross-linkers (dextran, chitosan, gum Arabic and pectin) were screened and the best alternative based on highest residual activity was chosen for further analysis.
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												  Fulltext01.Pdfhttp://www.diva-portal.org This is the published version of a paper published in Cellular and Molecular Life Sciences (CMLS). Citation for the original published paper (version of record): Cava, F., Lam, H., de Pedro, M., Waldor, M. (2011) Emerging knowledge of regulatory roles of D-amino acids in bacteria. Cellular and Molecular Life Sciences (CMLS), 68(5): 817-831 http://dx.doi.org/10.1007/s00018-010-0571-8 Access to the published version may require subscription. N.B. When citing this work, cite the original published paper. Permanent link to this version: http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-81861 Cell. Mol. Life Sci. (2011) 68:817–831 DOI 10.1007/s00018-010-0571-8 Cellular and Molecular Life Sciences REVIEW Emerging knowledge of regulatory roles of D-amino acids in bacteria Felipe Cava • Hubert Lam • Miguel A. de Pedro • Matthew K. Waldor Received: 13 July 2010 / Revised: 24 September 2010 / Accepted: 14 October 2010 / Published online: 14 December 2010 Ó The Author(s) 2010. This article is published with open access at Springerlink.com Abstract The D-enantiomers of amino acids have been Keywords D-amino acid Á Racemase Á Stationary phase Á thought to have relatively minor functions in biological Peptidoglycan Á Biofilm Á Regulation processes. While L-amino acids clearly predominate in nat- ure, D-amino acids are sometimes found in proteins that are Abbreviations not synthesized by ribosomes, and D-Ala and D-Glu are NRP Nonribosomal peptide routinely found in the peptidoglycan cell wall of bacteria. PG Peptidoglycan Here, we review recent findings showing that D-amino acids GlcNAc N-acetyl glucosamine have previously unappreciated regulatory roles in the bac- MurNAc N-acetylmuramic acid terial kingdom.
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												  Title Non-Stereospecific Transamination Catalyzed by Pyridoxal Phosphate-Dependent Amino Acid Racemases of Broad Substrate SpeciView metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by Kyoto University Research Information Repository Non-stereospecific Transamination Catalyzed by Pyridoxal Phosphate-dependent Amino Acid Racemases of Broad Title Substrate Specificity (MOLECULAR BIOFUNCTION- Molecular Microbial Science) Esaki, Nobuyoshi; Yoshimura, Tohru; Soda, Kenji; Lim, Author(s) Young Hee Citation ICR annual report (1999), 5: 46-47 Issue Date 1999-03 URL http://hdl.handle.net/2433/65185 Right Type Article Textversion publisher Kyoto University 46 ICR Annual Report, Vol. 5, 1998 Non-stereospecific Transamination Catalyzed by Pyridoxal Phosphate-dependent Amino Acid Racemases of Broad Substrate Specificity Nobuyoshi Esaki, Tohru Yoshimura, Kenji Soda and Young Hee Lim Pyridoxal 5’-phosphate-dependent amino acid racemases of broad substrate specificity catalyze transamination as a side-reaction. We studied the stereospecificities for hydrogen abstraction from C-4’ of the bound pyridoxamine 5’-phosphate during transamination from pyridoxamine 5’-phosphate to pyruvate catalyzed by three amino acid racemases of broad substrate specificity. When the enzymes were incubated with (4’S)- or (4’R)-[4’-3H]- pyridoxamine 5’-phosphate in the presence of pyruvate, tritium was released into the solvent from both pyridoxamine 5’-phosphates. Thus, these enzymes abstract a hydrogen non-stereospecifically from C-4’ of the coenzyme in contrast to the other pyridoxal 5’-phosphate-dependent enzymes so far studied which catalyze the stereospecific hydrogen removal. Amino acid racemase of broad substrate specificity from Pseudomonas putida produced D- and L-glutamate from α-ketoglutarate through the transamination with L-ornithine. Because glutamate does not serve as a substrate for racemization, the enzyme catalyzed the non-stereospecific overall transamination between L-ornithine and α-ketoglutarate.
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												  Exploring the Chemistry and Evolution of the IsomerasesExploring the chemistry and evolution of the isomerases Sergio Martínez Cuestaa, Syed Asad Rahmana, and Janet M. Thorntona,1 aEuropean Molecular Biology Laboratory, European Bioinformatics Institute, Wellcome Trust Genome Campus, Hinxton, Cambridge CB10 1SD, United Kingdom Edited by Gregory A. Petsko, Weill Cornell Medical College, New York, NY, and approved January 12, 2016 (received for review May 14, 2015) Isomerization reactions are fundamental in biology, and isomers identifier serves as a bridge between biochemical data and ge- usually differ in their biological role and pharmacological effects. nomic sequences allowing the assignment of enzymatic activity to In this study, we have cataloged the isomerization reactions known genes and proteins in the functional annotation of genomes. to occur in biology using a combination of manual and computa- Isomerases represent one of the six EC classes and are subdivided tional approaches. This method provides a robust basis for compar- into six subclasses, 17 sub-subclasses, and 245 EC numbers cor- A ison and clustering of the reactions into classes. Comparing our responding to around 300 biochemical reactions (Fig. 1 ). results with the Enzyme Commission (EC) classification, the standard Although the catalytic mechanisms of isomerases have already approach to represent enzyme function on the basis of the overall been partially investigated (3, 12, 13), with the flood of new data, an integrated overview of the chemistry of isomerization in bi- chemistry of the catalyzed reaction, expands our understanding of ology is timely. This study combines manual examination of the the biochemistry of isomerization. The grouping of reactions in- chemistry and structures of isomerases with recent developments volving stereoisomerism is straightforward with two distinct types cis-trans in the automatic search and comparison of reactions.
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												  Taxonomic and Functional Analyses of the Supragingival Microbiome from Caries-Affected and Caries-Free HostsTaxonomic and Functional Analyses of the Supragingival Microbiome from Caries-Affected and Caries-Free Hosts Jinzhi He1, Qichao Tu2,3, Yichen Ge1, Yujia Qin3, Bomiao Cui1, Xiaoyu Hu1, Yuxia Wang1, Ye Deng4, Kun Wang1, Joy D. Van Nostrand3, Jiyao Li 1, Jizhong Zhou3,5,6, Yan Li 1, Xuedong Zhou1 1 State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China 2 Department of Marine Sciences, Ocean College, Zhejiang University, Hangzhou, China 3 Institute for Environmental Genomics, Department of Microbiology and Plant Biology, and School of Civil Engineering and Environmental Sciences, University of Oklahoma, Norman, USA 4 Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China 5 State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, China 6 Earth Science Division, Lawrence Berkeley National Laboratory, Berkeley, USA Abstract Caries is one of the most prevalent and costly infectious diseases affecting humans of all ages. It is initiated by cariogenic supragingival dental plaques forming on salivacoated tooth surfaces, yet the etiology remains elusive. To determine which microbial populations may predispose a patient to caries, we report here an in-depth and comprehensive view of the microbial community associated with supragingival dental plaque collected from the healthy teeth of caries patients and healthy adults. We found that microbial communities from caries patients had a higher evenness and inter-individual variations but simpler ecological networks compared to healthy controls despite the overall taxonomic structure being similar. Genera including Selenomonas, Treponema, Atopobium, and Bergeriella were distributed differently between the caries and healthy groups with disturbed co- occurrence patterns.
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												  Is D-Aspartate Produced by Glutamic-Oxaloacetic Transaminase-1 Like 1 (Got1l1): a Putative Aspartate Racemase?Amino Acids (2015) 47:79–86 DOI 10.1007/s00726-014-1847-3 ORIGINAL ARTICLE Is d-aspartate produced by glutamic-oxaloacetic transaminase-1 like 1 (Got1l1): a putative aspartate racemase? Ayumi Tanaka-Hayashi · Shuuhei Hayashi · Ran Inoue · Tomokazu Ito · Kohtarou Konno · Tomoyuki Yoshida · Masahiko Watanabe · Tohru Yoshimura · Hisashi Mori Received: 23 July 2014 / Accepted: 25 September 2014 / Published online: 7 October 2014 © The Author(s) 2014. This article is published with open access at Springerlink.com Abstract D-Aspartate is an endogenous free amino acid hippocampus. The recombinant Got1l1 expressed in mam- in the brain, endocrine tissues, and exocrine tissues in malian cells showed L-aspartate aminotransferase activity, mammals, and it plays several physiological roles. In the but lacked aspartate racemase activity. These findings sug- testis, D-aspartate is detected in elongate spermatids, Ley- gest that Got1l1 is not the major aspartate racemase and dig cells, and Sertoli cells, and implicated in the synthesis there might be an as yet unknown D-aspartate-synthesizing and release of testosterone. In the hippocampus, D-aspartate enzyme. strongly enhances N-methyl-D-aspartate receptor-depend- ent long-term potentiation and is involved in learning and Keywords Glutamic-oxaloacetic transaminase-1 like 1 · memory. The existence of aspartate racemase, a candidate D-Aspartate · Knockout mice · Testis · Hippocampus · enzyme for D-aspartate production, has been suggested. Recombinant protein expression Recently, mouse glutamic-oxaloacetic transaminase 1-like 1 (Got1l1) has been reported to synthesize substantially Abbreviations D-aspartate from L-aspartate and to be involved in adult Got1l1 Glutamic-oxaloacetic transaminase-1 like 1 neurogenesis.
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												  Chapter 2 Immobilization of EnzymesChapter 2 Immobilization of Enzymes: A Literature Survey Beatriz Brena , Paula González-Pombo , and Francisco Batista-Viera Abstract The term immobilized enzymes refers to “enzymes physically confi ned or localized in a certain defi ned region of space with retention of their catalytic activities, and which can be used repeatedly and continuously.” Immobilized enzymes are currently the subject of considerable interest because of their advantages over soluble enzymes. In addition to their use in industrial processes, the immobilization techniques are the basis for making a number of biotechnology products with application in diagnostics, bioaffi nity chromatography, and biosensors. At the beginning, only immobilized single enzymes were used, after 1970s more complex systems including two-enzyme reactions with cofactor regeneration and living cells were developed. The enzymes can be attached to the support by interactions ranging from reversible physical adsorp- tion and ionic linkages to stable covalent bonds. Although the choice of the most appropriate immobilization technique depends on the nature of the enzyme and the carrier, in the last years the immobilization tech- nology has increasingly become a matter of rational design. As a consequence of enzyme immobilization, some properties such as catalytic activity or thermal stability become altered. These effects have been demonstrated and exploited. The concept of stabilization has been an important driving force for immobilizing enzymes. Moreover, true stabilization at the molecular level has been demonstrated, e.g., proteins immobilized through multipoint covalent binding. Key words Immobilized enzymes , Bioaffi nity chromatography , Biosensors , Enzyme stabilization , Immobilization methods 1 Background Enzymes are biological catalysts that promote the transformation of chemical species in living systems.
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												  Applications of Enzyme Catalysis – Biocatalysis10.542 – Biochemical Engineering Spring 2005 Applications of Enzyme Catalysis – Biocatalysis • Working definition – the use of an enzyme-catalyzed reaction to convert a single starting compound to a single product o distinguished from the use of whole cells for multi-step synthetic pathways, which also use enzymes to catalyze each conversion Why use enzyme catalysis over traditional (usu. solvent-based) organic synthesis? ( Rozzell, J. D. "Commercial scale biocatalysis: myths and realities." Bioorg Med Chem 7, no. 10 (October 1999): 2253-61.) • Catalyst selectivity/specificity • Mild reaction conditions • Environmentally friendly, “green chemistry” • High catalytic efficiency ¾ Greatest interest industrially is for production of chiral compounds (see handout for examples) Substrate selectivity versus substrate range • Industrial emphasis on selectivity is most often in the context of stereoselectivity, i.e., selective conversion or production of one enantiomer, but • The best industrial enzymes will have a broad substrate range, i.e., the ability the catalyze the same type of reaction (attack the same functional group) with a variety of substrates. Example – Subtilisin (serine protease) Natural reaction: peptide bond hydrolysis, though activity against esters was known O O R2 O R2 O NH NH NH NH OH NH H2N O R R1 3 R1 O R3 Unnatural reaction: resolution of a racemic ester mixture for production of a pharmaceutical intermediate (Courtesy of Merck & Co. Used with permission.) F F F F F F O O O H + H MeO N HO N MeO N N O N O N O OMe OMe OMe DHP Methyl Ester R-DHP Acid S-DHP MethylEster See “Survey of Biocatalytic Reactions” handout for additional examples.
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												  SI Appendix Index 1SI Appendix Index Calculating chemical attributes using EC-BLAST ................................................................................ 2 Chemical attributes in isomerase reactions ............................................................................................ 3 Bond changes …..................................................................................................................................... 3 Reaction centres …................................................................................................................................. 5 Substrates and products …..................................................................................................................... 6 Comparative analysis …........................................................................................................................ 7 Racemases and epimerases (EC 5.1) ….................................................................................................. 7 Intramolecular oxidoreductases (EC 5.3) …........................................................................................... 8 Intramolecular transferases (EC 5.4) ….................................................................................................. 9 Supporting references …....................................................................................................................... 10 Fig. S1. Overview …............................................................................................................................
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												  Immobilization of Cellulase for Industrial Production Gordana Hojnik Podrepšek, Mateja Primožiþ, Željko Knez, Maja Habulin*A publication of CHEMICAL ENGINEERING TRANSACTIONS The Italian Association VOL. 27, 2012 of Chemical Engineering Online at: www.aidic.it/cet Guest Editors: Enrico Bardone, Alberto Brucato, Tajalli Keshavarz Copyright © 2012, AIDIC Servizi S.r.l., ISBN 978-88-95608-18-1; ISSN 1974-9791 Immobilization of Cellulase for Industrial Production Gordana Hojnik Podrepšek, Mateja Primožiþ, Željko Knez, Maja Habulin* University of Maribor, Faculty of Chemistry and Chemical Engineering, Laboratory for Separation Processes and Product Design, Smetanova ul. 17, 2000 Maribor, Slovenia [email protected] Immobilized enzymes are used in analytical chemistry and as catalysts for the production of chemicals, pharmaceuticals and food. Because of their particular structure, immobilized enzymes require optimal conditions, different from those of soluble enzymes. Particle size, particle-size distribution, mechanical and chemical structure, stability and the catalytic activity, used for immobilization, must be considered. Generally, cellulases are used in various industries, including food, brewery and wine, agriculture, textile, detergent, animal feed, pulp and paper, and in research development. For the industrial application of cellulase, its immobilization, which allows the conditions of repeated use of the enzyme alongside retaining its activity, has been recently investigated. Celullase was immobilized with the use of glutaraldehyde, a covalent cross-linking agent in to cross-linked enzyme aggregates (CLEAs). The stability and activity of cross-linked cellulase, exposed to carbon dioxide under high pressure, were studied. Efficiency of enzyme immobilization was determined using Bradford method (Bradford, 1976). The activity of cross-linked cellulase was determined by spectrophotometric method. 1. Introduction Cellulase, a multicomponent enzyme, consisting of three different enzymes (endocellulase, cellobiohydrolase and ß-glucosidase) is responsible for bioconversion of cellulose into soluble sugar (Zhou et al., 2009).
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												  Enantiomeric Chromatographic Separations and Ionic Liquids Jie Ding Iowa State UniversityIowa State University Capstones, Theses and Retrospective Theses and Dissertations Dissertations 2005 Enantiomeric chromatographic separations and ionic liquids Jie Ding Iowa State University Follow this and additional works at: https://lib.dr.iastate.edu/rtd Part of the Analytical Chemistry Commons, Medicinal and Pharmaceutical Chemistry Commons, Medicinal Chemistry and Pharmaceutics Commons, Medicinal-Pharmaceutical Chemistry Commons, and the Organic Chemistry Commons Recommended Citation Ding, Jie, "Enantiomeric chromatographic separations and ionic liquids " (2005). Retrospective Theses and Dissertations. 1725. https://lib.dr.iastate.edu/rtd/1725 This Dissertation is brought to you for free and open access by the Iowa State University Capstones, Theses and Dissertations at Iowa State University Digital Repository. It has been accepted for inclusion in Retrospective Theses and Dissertations by an authorized administrator of Iowa State University Digital Repository. For more information, please contact [email protected]. Enantiomeric chromatographic separations and ionic liquids by Jie Ding A dissertation submitted to the graduate faculty in partial fulfillment of the requirements for the degree of DOCTOR OF PHILOSOPHY Major: Analytical Chemistry Program of Study Committee: Daniel W. Armstrong, Major Professor Lee Anne Willson Robert S. Houk Jacob W. Petrich Richard C. Larock Iowa State University Ames, Iowa 2005 Copyright © Jie Ding, 2005. All rights reserved. UMI Number: 3200412 Copyright 2005 by Ding, Jie All rights reserved. INFORMATION TO USERS The quality of this reproduction is dependent upon the quality of the copy submitted. Broken or indistinct print, colored or poor quality illustrations and photographs, print bleed-through, substandard margins, and improper alignment can adversely affect reproduction. In the unlikely event that the author did not send a complete manuscript and there are missing pages, these will be noted.