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Статті в журналах з теми "Enzymes Synthesis"

Автор: Grafiati

Опубліковано: 4 червня 2021

Оновлено: 6 вересня 2023

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1

Malá, Š., P. Karasová, M. Marková, and B. Králová. "Oligosaccharide synthesis using a-glucosidases of different origin." Czech Journal of Food Sciences 19, No. 2 (February 7, 2013): 57–61. http://dx.doi.org/10.17221/6576-cjfs.

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a-Glucosidase from Aspergillus awamori and intestinal a-glucosidase (saccharase-isomaltase complex) exhibited high transglycosylation activity and were able to synthesize tri- and tetrasaccharides during maltose hydrolysis. Both tested enzymes were also able to transfer the glucose residue to all tested monosaccharide acceptors (D-mannose, D-xylose, L-sorbose and D-galactose). Their transfer activity towards respective acceptors varied and their acceptor preference also depended on the origin of the enzyme. Out of the acceptors tested, both enzymes exhibited high transfer activity in xylose.

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2

Herman, Richard Ansah, Xuan Zhu, Ellen Ayepa, Shuai You, and Jun Wang. "Advances in the One-Step Approach of Polymeric Materials Using Enzymatic Techniques." Polymers 15, no. 3 (January 30, 2023): 703. http://dx.doi.org/10.3390/polym15030703.

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The formulation in which biochemical enzymes are administered in polymer science plays a key role in retaining their catalytic activity. The one-step synthesis of polymers with highly sequence-controlled enzymes is a strategy employed to provide enzymes with higher catalytic activity and thermostability in material sustainability. Enzyme-catalyzed chain growth polymerization reactions using activated monomers, protein–polymer complexation techniques, covalent and non-covalent interaction, and electrostatic interactions can provide means to develop formulations that maintain the stability of th

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3

O'Keefe, S. J., W. M. Bennet, A. R. Zinsmeister, and M. W. Haymond. "Pancreatic enzyme synthesis and turnover in human subjects." American Journal of Physiology-Gastrointestinal and Liver Physiology 266, no. 5 (May 1, 1994): G816—G821. http://dx.doi.org/10.1152/ajpgi.1994.266.5.g816.

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Animal studies have shown that pancreatic enzyme secretion is independent of enzyme synthesis. To investigate this relationship in humans, we have coinfused 14C-labeled leucine tracer with cholecystokinin octapeptide in nine healthy adults for 4 h and measured the rate of appearance of secreted and newly labeled enzymes in the duodenum. Enzyme secretion was well maintained throughout, but newly labeled enzymes only appeared in juice between 75 and 101 min (median time, 86 min), indicating that initial secretion was dependent on the release of zymogen stores and that the median production time

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4

Juwon, Arotupin Daniel, and Ogunmolu Funso Emmanuel. "Experimental Investigations on the Effects of Carbon and Nitrogen Sources on Concomitant Amylase and Polygalacturonase Production by Trichoderma viride BITRS-1001 in Submerged Fermentation." Biotechnology Research International 2012 (July 15, 2012): 1–8. http://dx.doi.org/10.1155/2012/904763.

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The paper investigates the effects of different commercial carbon and nitrogen sources on the concomitant synthesis of amylase and polygalacturonase enzymes with the aim of optimizing them for maximal enzyme production. The microorganism used in this work was the fungus Trichoderma viride BITRS-1001, which had been previously identified as a highly active producer of amylase and polygalacturonase enzymes. The results showed that the different commercial carbon and nitrogen substrate significantly affected the concomitant syntheses of amylase and polygalacturonase in culture media supplemented

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5

Hu, Chong, Yunxiu Bai, Miao Hou, Yisu Wang, Licheng Wang, Xun Cao, Chiu-Wing Chan, et al. "Defect-induced activity enhancement of enzyme-encapsulated metal-organic frameworks revealed in microfluidic gradient mixing synthesis." Science Advances 6, no. 5 (January 2020): eaax5785. http://dx.doi.org/10.1126/sciadv.aax5785.

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Mimicking the cellular environment, metal-organic frameworks (MOFs) are promising for encapsulating enzymes for general applications in environments often unfavorable for native enzymes. Markedly different from previous researches based on bulk solution synthesis, here, we report the synthesis of enzyme-embedded MOFs in a microfluidic laminar flow. The continuously changed concentrations of MOF precursors in the gradient mixing on-chip resulted in structural defects in products. This defect-generating phenomenon enables multimodal pore size distribution in MOFs and therefore allows improved ac

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6

Bur, Daniel, Marcel A. Luyten, Hla Wynn, Louis R. Provencher, J. Bryan Jones, Marvin Gold, James D. Friesen, Anthony R. Clarke, and J. John Holbrook. "An evaluation of the substrate specificity and asymmetric synthesis potential of the cloned L-lactate dehydrogenase from Bacillusstearothermophilus." Canadian Journal of Chemistry 67, no. 6 (June 1, 1989): 1065–70. http://dx.doi.org/10.1139/v89-161.

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The potential utility of the L-lactate dehydrogenase of Bacillusstearothermophilus (BSLDH) for stereospecific, preparative-scale reductions of α-keto acids to (S)-α-hydroxy acids of > 99% ee has been demonstrated. BSLDH is a stable, thermophilic, enzyme whose gene has been cloned into a high-expression vector to assure its plentiful supply. Its specificity for keto acid substrates possessing straight- and branched-chain alkyl, cyclopropyl, or phenyl groups has been evaluated in preparative and kinetic terms, and compared with that of the mammalian pig heart enzyme (PHLDH). The specificities

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7

Smith, A. G. "Subcellular localization of two porphyrin-synthesis enzymes in Pisum sativum (pea) and Arum (cuckoo-pint) species." Biochemical Journal 249, no. 2 (January 15, 1988): 423–28. http://dx.doi.org/10.1042/bj2490423.

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The subcellular location of the two porphyrin-synthesis enzymes 5-aminolaevulinate dehydratase (ALAD) and porphobilinogen deaminase (PBGD) was investigated in Pisum sativum (pea) leaves and spadices of Arum (cuckoo-pint). Throughout the tissue-fractionation procedures the distribution of the two enzymes paralleled that of the plastid marker enzyme (ADP-glucose pyrophosphorylase), even in Arum, a tissue where the synthesis of non-plastid haem is predominant. The distribution of cytosolic marker enzyme (lactate dehydrogenase) was significantly different from that of ALAD and PBGD and, although p

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8

Hai guan Ding, Hai guan Ding, Zhi qiang Cai Zhi qiang Cai, Ling Hou Ling Hou, Zhi quan Hu Zhi quan Hu, Zheng sheng Jin Zheng sheng Jin, Di Xu Di Xu, Hui Cao Miao miao Meng Hui Cao Miao miao Meng, Yu Hui Xie Yu Hui Xie, and De qiang Zheng De qiang Zheng. "Synthesis and Evaluation of Some Novel 6-Substituted Quinazoline Derivatives as Antitumor Agents." Journal of the chemical society of pakistan 41, no. 1 (2019): 186. http://dx.doi.org/10.52568/000716/jcsp/41.01.2019.

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A series of novel 6-substituted quinazoline derivatives were synthesised as epidermal growth factor receptor(EGFR) and Human epidermal growth factor receptor 2 (HER2)inhibitors in our lab. The novel compounds were measured for their dual enzyme inhibition as well as their cytotoxic activity on MCF7 cell line. The results revealed that all the compounds showed inhibition of both enzymes. Compound 5c showed the best inhibitory activity against both enzymes and IC50 of its was 2.6 nM against EGFR kinases and 4.3 nM against HER2 kinases, respectively. Most of the measured compounds showed to antit

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9

Morrow, Cary J. "Biocatalytic Synthesis of Polyesters Using Enzymes." MRS Bulletin 17, no. 11 (November 1992): 43–47. http://dx.doi.org/10.1557/s0883769400046650.

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Plants and animals have been exploited as sources of materials for centuries but, as our ability to analyze and fractionate them has progressed, the extraordinary range of properties available from materials produced by living systems has continued to grow. Doi, in another article in this issue of the MRS Bulletin, presents a discussion of a group of naturally occurring polyesters related to poly(beta-hydroxybutyrate). These polyesters are formed in vivo by several microorganisms as part of an energy storage scheme. Research on these systems has allowed growth conditions to be found that can l

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10

Wong, Chi-Huey. "Enzymes for Glycoprotein Synthesis." CHIMIA International Journal for Chemistry 63, no. 6 (June 24, 2009): 318–26. http://dx.doi.org/10.2533/chimia.2009.318.

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11

ORITANI, Takayuki. "Organic synthesis using enzymes." Journal of the agricultural chemical society of Japan 64, no. 2 (1990): 199–202. http://dx.doi.org/10.1271/nogeikagaku1924.64.199.

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12

Koeller, Kathryn M., and Chi-Huey Wong. "Enzymes for chemical synthesis." Nature 409, no. 6817 (January 2001): 232–40. http://dx.doi.org/10.1038/35051706.

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13

Smith, Janet L. "Enzymes of nucleotide synthesis." Current Opinion in Structural Biology 5, no. 6 (December 1995): 752–57. http://dx.doi.org/10.1016/0959-440x(95)80007-7.

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14

Scott, Nicola A., Laura J. Sharpe, Isabelle M. Capell-Hattam, Samuel J. Gullo, Winnie Luu та Andrew J. Brown. "The cholesterol synthesis enzyme lanosterol 14α-demethylase is post-translationally regulated by the E3 ubiquitin ligase MARCH6". Biochemical Journal 477, № 2 (31 січня 2020): 541–55. http://dx.doi.org/10.1042/bcj20190647.

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Cholesterol synthesis is a tightly controlled pathway, with over 20 enzymes involved. Each of these enzymes can be distinctly regulated, helping to fine-tune the production of cholesterol and its functional intermediates. Several enzymes are degraded in response to increased sterol levels, whilst others remain stable. We hypothesised that an enzyme at a key branch point in the pathway, lanosterol 14α-demethylase (LDM) may be post-translationally regulated. Here, we show that the preceding enzyme, lanosterol synthase is stable, whilst LDM is rapidly degraded. Surprisingly, this degradation is n

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15

Abdi, Sayed Aliul Hasan, Abdulaziz Alzahrani, Saleh Alghamdi, Ali Alquraini, and Adel Alghamdi. "Hexaconazole exposure ravages biosynthesis pathway of steroid hormones: revealed by molecular dynamics and interaction." Toxicology Research 11, no. 1 (December 16, 2021): 60–76. http://dx.doi.org/10.1093/toxres/tfab113.

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Abstract Widespread application of hexaconazole for agriculture purpose poses a threat to human health by disrupting normal endocrine homeostasis. To avoid adverse health effects on human, it is crucial to identify the effects of hexaconazole on key enzymes responsible for steroidal hormone synthesis. In view of this, present study was conducted to investigate the interaction mechanisms of hexaconazole with key enzymes in comparison with their food drug administration (FDA) approved inhibitor by molecular docking and molecular dynamics simulations. Results indicate that hexaconazole contacts w

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16

Wild, D., R. von Schulthess, and W. Gujer. "Synthesis of denitrification enzymes in activated sludge: modelling with structured biomass." Water Science and Technology 30, no. 6 (September 1, 1994): 113–22. http://dx.doi.org/10.2166/wst.1994.0258.

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Three mechanisms are responsible for microbiological elimination processes in activated sludge: the survival of qualified organisms in the ecological selection process, the expression of specific enzymes and the absence of inhibitors limiting enzyme activity. A mathematical model with structured biomass has been formulated to improve the description of data from denitrification experiments. The model includes synthesis and decay of denitrification enzymes and is able to predict nitrate, nitrite and N2O concentrations. Kinetic parameters have been estimated and used to simulate the effect of ce

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17

Junior, Ivaldo I., Emanuela Calcio Gaudino, Katia Martina, Giancarlo Cravotto, Rafael Luque, and Rodrigo O. M. A. de Souza. "Improving the esterification activity of Pseudomonas fluorescens and Burkholderia cepacia lipases via cross-linked cyclodextrin immobilization." RSC Adv. 4, no. 86 (2014): 45772–77. http://dx.doi.org/10.1039/c4ra03797a.

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Improving activities: solid cross-linked β-cyclodextrin enzymes can remarkably improve thermal stability and enzyme activity as compared to commercial immobilized enzymes in esterification reactions (e.g., monostearin synthesis).

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18

Li, Can, Zhishang Shi, Jinxing Cai, Ping Wang, Fang Wang, Meiting Ju, Jinpeng Liu, and Qilin Yu. "Synthesis of Phenylboronic Acid-Functionalized Magnetic Nanoparticles for Sensitive Soil Enzyme Assays." Molecules 27, no. 20 (October 14, 2022): 6883. http://dx.doi.org/10.3390/molecules27206883.

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Soil enzymes, such as invertase, urease, acidic phosphatase and catalase, play critical roles in soil biochemical reactions and are involved in soil fertility. However, it remains a great challenge to efficiently concentrate soil enzymes and sensitively assess enzyme activity. In this study, we synthesized phenylboronic acid-functionalized magnetic nanoparticles to rapidly capture soil enzymes for sensitive soil enzyme assays. The iron oxide magnetic nanoparticles (MNPs) were firstly prepared by the co-precipitation method and then functionalized by (3-aminopropyl)triethoxysilane, polyethylene

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19

Busch, Hagedoorn, and Hanefeld. "Rhodococcus as A Versatile Biocatalyst in Organic Synthesis." International Journal of Molecular Sciences 20, no. 19 (September 26, 2019): 4787. http://dx.doi.org/10.3390/ijms20194787.

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The application of purified enzymes as well as whole-cell biocatalysts in synthetic organic chemistry is becoming more and more popular, and both academia and industry are keen on finding and developing novel enzymes capable of performing otherwise impossible or challenging reactions. The diverse genus Rhodococcus offers a multitude of promising enzymes, which therefore makes it one of the key bacterial hosts in many areas of research. This review focused on the broad utilization potential of the genus Rhodococcus in organic chemistry, thereby particularly highlighting the specific enzyme clas

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20

Greicius, Aurimas, Tautvydas Baliutavicius, Egle Lastauskiene, and Renata Gudiukaite. "Application of Milk Permeate as an Inducer for the Production of Microbial Recombinant Lipolytic Enzymes." Fermentation 9, no. 1 (December 28, 2022): 27. http://dx.doi.org/10.3390/fermentation9010027.

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Recombinantly produced enzymes are applied in many fields, ranging from medicine to food and nutrition, production of detergents, textile, leather, paper, pulp, and plastics. Thus, the cost-effectiveness of recombinant enzyme synthesis is an important issue in biotechnological industry. Isopropyl-β-D-thiogalactoside (IPTG), an analog of lactose, is currently the most widely used chemical agent for the induction of recombinant enzyme synthesis. However, the use of IPTG can lead to production of toxic elements and can introduce physiological stress to cells. Thus, this study aims to find a simpl

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21

Sharpe, Laura J., Hudson W. Coates, and Andrew J. Brown. "Post-translational control of the long and winding road to cholesterol." Journal of Biological Chemistry 295, no. 51 (October 13, 2020): 17549–59. http://dx.doi.org/10.1074/jbc.rev120.010723.

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The synthesis of cholesterol requires more than 20 enzymes, many of which are intricately regulated. Post-translational control of these enzymes provides a rapid means for modifying flux through the pathway. So far, several enzymes have been shown to be rapidly degraded through the ubiquitin–proteasome pathway in response to cholesterol and other sterol intermediates. Additionally, several enzymes have their activity altered through phosphorylation mechanisms. Most work has focused on the two rate-limiting enzymes: 3-hydroxy-3-methylglutaryl CoA reductase and squalene monooxygenase. Here, we r

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22

Biswas, Ansuman, and Mukund Thattai. "Promiscuity and specificity of eukaryotic glycosyltransferases." Biochemical Society Transactions 48, no. 3 (June 15, 2020): 891–900. http://dx.doi.org/10.1042/bst20190651.

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Glycosyltransferases are a large family of enzymes responsible for covalently linking sugar monosaccharides to a variety of organic substrates. These enzymes drive the synthesis of complex oligosaccharides known as glycans, which play key roles in inter-cellular interactions across all the kingdoms of life; they also catalyze sugar attachment during the synthesis of small-molecule metabolites such as plant flavonoids. A given glycosyltransferase enzyme is typically responsible for attaching a specific donor monosaccharide, via a specific glycosidic linkage, to a specific moiety on the acceptor

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23

Koga, Yosuke, and Hiroyuki Morii. "Biosynthesis of Ether-Type Polar Lipids in Archaea and Evolutionary Considerations." Microbiology and Molecular Biology Reviews 71, no. 1 (March 2007): 97–120. http://dx.doi.org/10.1128/mmbr.00033-06.

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SUMMARY This review deals with the in vitro biosynthesis of the characteristics of polar lipids in archaea along with preceding in vivo studies. Isoprenoid chains are synthesized through the classical mevalonate pathway, as in eucarya, with minor modifications in some archaeal species. Most enzymes involved in the pathway have been identified enzymatically and/or genomically. Three of the relevant enzymes are found in enzyme families different from the known enzymes. The order of reactions in the phospholipid synthesis pathway (glycerophosphate backbone formation, linking of glycerophosphate w

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24

Rolf, Jascha, Katrin Rosenthal, and Stephan Lütz. "Application of Cell-Free Protein Synthesis for Faster Biocatalyst Development." Catalysts 9, no. 2 (February 19, 2019): 190. http://dx.doi.org/10.3390/catal9020190.

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Cell-free protein synthesis (CFPS) has become an established tool for rapid protein synthesis in order to accelerate the discovery of new enzymes and the development of proteins with improved characteristics. Over the past years, progress in CFPS system preparation has been made towards simplification, and many applications have been developed with regard to tailor-made solutions for specific purposes. In this review, various preparation methods of CFPS systems are compared and the significance of individual supplements is assessed. The recent applications of CFPS are summarized and the potent

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25

Mu, Ruipu, Zhaoshuai Wang, Max C. Wamsley, Colbee N. Duke, Payton H. Lii, Sarah E. Epley, London C. Todd, and Patty J. Roberts. "Application of Enzymes in Regioselective and Stereoselective Organic Reactions." Catalysts 10, no. 8 (July 24, 2020): 832. http://dx.doi.org/10.3390/catal10080832.

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Nowadays, biocatalysts have received much more attention in chemistry regarding their potential to enable high efficiency, high yield, and eco-friendly processes for a myriad of applications. Nature’s vast repository of catalysts has inspired synthetic chemists. Furthermore, the revolutionary technologies in bioengineering have provided the fast discovery and evolution of enzymes that empower chemical synthesis. This article attempts to deliver a comprehensive overview of the last two decades of investigation into enzymatic reactions and highlights the effective performance progress of bio-enz

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26

Fateev, Ilja V., Maria A. Kostromina, Yuliya A. Abramchik, Barbara Z. Eletskaya, Olga O. Mikheeva, Dmitry D. Lukoshin, Evgeniy A. Zayats, et al. "Multi-Enzymatic Cascades in the Synthesis of Modified Nucleosides: Comparison of the Thermophilic and Mesophilic Pathways." Biomolecules 11, no. 4 (April 16, 2021): 586. http://dx.doi.org/10.3390/biom11040586.

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A comparative study of the possibilities of using ribokinase → phosphopentomutase → nucleoside phosphorylase cascades in the synthesis of modified nucleosides was carried out. Recombinant phosphopentomutase from Thermus thermophilus HB27 was obtained for the first time: a strain producing a soluble form of the enzyme was created, and a method for its isolation and chromatographic purification was developed. It was shown that cascade syntheses of modified nucleosides can be carried out both by the mesophilic and thermophilic routes from D-pentoses: ribose, 2-deoxyribose, arabinose, xylose, and

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27

Shi, Yuguang, and Dong Cheng. "Beyond triglyceride synthesis: the dynamic functional roles of MGAT and DGAT enzymes in energy metabolism." American Journal of Physiology-Endocrinology and Metabolism 297, no. 1 (July 2009): E10—E18. http://dx.doi.org/10.1152/ajpendo.90949.2008.

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Monoacyglycerol acyltransferases (MGATs) and diacylglycerol acyltransferases (DGATs) catalyze two consecutive steps of enzyme reactions in the synthesis of triacylglycerols (TAGs). The metabolic complexity of TAG synthesis is reflected by the presence of multiple isoforms of MGAT and DGAT enzymes that differ in catalytic properties, subcellular localization, tissue distribution, and physiological functions. MGAT and DGAT enzymes play fundamental roles in the metabolism of monoacylglycerol (MAG), diacylglycerol (DAG), and triacylglycerol (TAG) that are involved in many aspects of physiological

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28

Fang, Jim-Min, Chun-Hung Lin, Curt W. Bradshaw, and Chi-Huey Wong. "Enzymes in organic synthesis: oxidoreductions." Journal of the Chemical Society, Perkin Transactions 1, no. 8 (1995): 967. http://dx.doi.org/10.1039/p19950000967.

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29

Collier, Steve. "Asymmetric Organic Synthesis with Enzymes." Synthesis 2009, no. 15 (July 27, 2009): 2650. http://dx.doi.org/10.1055/s-0029-1216915.

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30

Rosei, M. A., L. Mosca, C. Foppoli, R. Coccia, and C. De Marco. "Alternative enzymes in melanin synthesis." Melanoma Research 5 (September 1995): 19. http://dx.doi.org/10.1097/00008390-199509001-00024.

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31

Hudlicky, Tomas. "Introduction to Enzymes in Synthesis." Chemical Reviews 111, no. 7 (July 13, 2011): 3995–97. http://dx.doi.org/10.1021/cr200185s.

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32

BORMAN, STU. "Glycopeptide synthesis uses engineered enzymes." Chemical & Engineering News 71, no. 31 (August 2, 1993): 25–28. http://dx.doi.org/10.1021/cen-v071n031.p025.

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33

Basavaiah, Deevi, and P. Rama Krishna. "Enantioselective synthesis using crude enzymes." Pure and Applied Chemistry 64, no. 8 (January 1, 1992): 1067–72. http://dx.doi.org/10.1351/pac199264081067.

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34

Bhupathy, M., D. L. Hughes, J. S. Amato, J. J. Bergan, J. L. Leazer, T. C. Lovelace, J. M. McNamara, et al. "Enzymes and practical asymmetric synthesis." Pure and Applied Chemistry 64, no. 12 (January 1, 1992): 1939–44. http://dx.doi.org/10.1351/pac199264121939.

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35

Kent, Stephen. "Total chemical synthesis of enzymes." Journal of Peptide Science 9, no. 9 (2003): 574–93. http://dx.doi.org/10.1002/psc.475.

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36

Winkler, Margit, Martina Geier, Steven P. Hanlon, Bernd Nidetzky, and Anton Glieder. "Human Enzymes for Organic Synthesis." Angewandte Chemie International Edition 57, no. 41 (September 11, 2018): 13406–23. http://dx.doi.org/10.1002/anie.201800678.

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37

Turner, Nicholas J. "The Application of Enzymes in the Synthesis of Amino Acids, Peptides and Carbohydrates." Current Organic Chemistry 1, no. 1 (May 1997): 21–36. http://dx.doi.org/10.2174/1385272801666220121183432.

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Enzymatic transformations have recently assumed great importance in the synthesis of enantiomerically pure amino acids and carbohydrates, particularly as the requirement for efficient methods in catalytic asymmetric synthesis increases. A large number of enzymes, that catalyse a wide range of different synthetic transformations, have been identified and are J currently being applied in many laboratories including our own. This Chapter will focus on recent work from the Edinburgh group and will address the application of those enzymes that catalyse the (i) hydrolysis of esters (ii) the ring-ope

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38

Medlock, Amy E., and Harry A. Dailey. "New Avenues of Heme Synthesis Regulation." International Journal of Molecular Sciences 23, no. 13 (July 5, 2022): 7467. http://dx.doi.org/10.3390/ijms23137467.

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During erythropoiesis, there is an enormous demand for the synthesis of the essential cofactor of hemoglobin, heme. Heme is synthesized de novo via an eight enzyme-catalyzed pathway within each developing erythroid cell. A large body of data exists to explain the transcriptional regulation of the heme biosynthesis enzymes, but until recently much less was known about alternate forms of regulation that would allow the massive production of heme without depleting cellular metabolites. Herein, we review new studies focused on the regulation of heme synthesis via carbon flux for porphyrin synthesi

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39

Kohen, Amnon, Priyanka Singh, and Qi Guo. "Chemoenzymatic Synthesis of Ubiquitous Biological Redox Cofactors." Synlett 28, no. 10 (April 10, 2017): 1151–59. http://dx.doi.org/10.1055/s-0036-1588768.

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Redox cofactors are utilized by a myriad of proteins, ranging from metabolic enzymes to those performing post-translational modifications. Labeled redox cofactors have served as a vital tool for a broad range of studies. This account describes chemoenzymatic syntheses of the isotopically labeled, biologically important redox cofactors: nicotinamide adenine dinucleotide, methylene tetrahydrofolate, and flavin nucleotides. An overview of the general strategy is presented. These examples demonstrate the utility of enzymatic synthesis.1 Introduction2 Nicotinamide Cofactors2.1 Synthesis of Remote-L

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40

Anboo, Shamini, Sie Yon Lau, Jibrail Kansedo, Pow-Seng Yap, Tony Hadibarata, and Azlina Harun Kamaruddin. "Synthesis of Enzyme-based Organic-Inorganic Hybrid Nanoflower Particles." MATEC Web of Conferences 377 (2023): 01011. http://dx.doi.org/10.1051/matecconf/202337701011.

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Enzyme-incorporated hybrid nanostructures are the immobilization of enzymes and inorganic components that exhibits promising characteristics in various industries. The immobilization of enzymes onto nanomaterial is naturally based to accommodate the enzymatic activity, stability, recyclability as well as their catalytic functions. The designing of these conjugates can improve the overall enzymatic performance by imparting their novel properties onto the system in comparison to conventional free enzymes which experience drawbacks in terms of deactivation or denaturing. A facile and ultrafast me

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41

Díaz-Juárez, Julieta A., and Rolando Hernández-Muñoz. "Rat Liver Enzyme Release Depends on Blood Flow-Bearing Physical Forces Acting in Endothelium Glycocalyx rather than on Liver Damage." Oxidative Medicine and Cellular Longevity 2017 (2017): 1–15. http://dx.doi.org/10.1155/2017/1360565.

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We have found selective elevation of serum enzyme activities in rats subjected to partial hepatectomy (PH), apparently controlled by hemodynamic flow-bearing physical forces. Here, we assess the involvement of stretch-sensitive calcium channels and calcium mobilization in isolated livers, after chemical modifications of the endothelial glycocalyx and changing perfusion directionality. Inhibiting in vivo protein synthesis, we found that liver enzyme release is influenced by de novo synthesis of endothelial glycocalyx components, and released enzymes are confined into a liver “pool.” Moreover, l

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42

Kinner, Alina, Philipp Nerke, Regine Siedentop, Till Steinmetz, Thomas Classen, Katrin Rosenthal, Markus Nett, Jörg Pietruszka, and Stephan Lütz. "Recent Advances in Biocatalysis for Drug Synthesis." Biomedicines 10, no. 5 (April 21, 2022): 964. http://dx.doi.org/10.3390/biomedicines10050964.

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Biocatalysis is constantly providing novel options for the synthesis of active pharmaceutical ingredients (APIs). In addition to drug development and manufacturing, biocatalysis also plays a role in drug discovery and can support many active ingredient syntheses at an early stage to build up entire scaffolds in a targeted and preparative manner. Recent progress in recruiting new enzymes by genome mining and screening or adapting their substrate, as well as product scope, by protein engineering has made biocatalysts a competitive tool applied in academic and industrial spheres. This is especial

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43

Sood, Ankur, Seong Min Ji, Anuj Kumar, and Sung Soo Han. "Enzyme-Triggered Crosslinked Hybrid Hydrogels for Bone Tissue Engineering." Materials 15, no. 18 (September 14, 2022): 6383. http://dx.doi.org/10.3390/ma15186383.

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The quest to develop state-of-the-art hydrogels for bone tissue engineering has accompanied substantial innovation and significant progression in the field of bioactive hydrogels. Still, there is scope for advancement in this cell-friendly and biocompatible scaffold system. The crosslinking approaches used for hydrogel synthesis plays a decisive role in guiding and regulating the mechanical stability, network framework, macroscopic architect, immunological behaviors, and cellular responses. Until recently, enzyme-based crosslinking strategies were considered as the pinnacle in designing effici

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44

Girard, M. T., M. Matsubara, C. Kublin, M. J. Tessier, C. Cintron, and M. E. Fini. "Stromal fibroblasts synthesize collagenase and stromelysin during long-term tissue remodeling." Journal of Cell Science 104, no. 4 (April 1, 1993): 1001–11. http://dx.doi.org/10.1242/jcs.104.4.1001.

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The process of connective tissue remodeling is an important mechanism contributing to tissue morphogenesis in development and homeostasis. Although it has long been known that remodeling tissues actively mediate collagenolysis, little is understood about the molecular mechanisms controlling this cell-regulated process. In this study, we examined the biosynthesis of collagenase and the related metalloproteinase, stromelysin, during remodeling of repair tissue deposited after mechanical injury to the rabbit cornea. Neither enzyme was synthesized by uninjured corneas; however, synthesis and secre

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45

CHASSAGNOLE, Christophe, David A. FELL, Badr RAÏS, Bernard KUDLA, and Jean-Pierre MAZAT. "Control of the threonine-synthesis pathway in Escherichia coli: a theoretical and experimental approach." Biochemical Journal 356, no. 2 (May 24, 2001): 433–44. http://dx.doi.org/10.1042/bj3560433.

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A computer simulation of the threonine-synthesis pathway in Escherichia coli Tir-8 has been developed based on our previous measurements of the kinetics of the pathway enzymes under near-physiological conditions. The model successfully simulates the main features of the time courses of threonine synthesis previously observed in a cell-free extract without alteration of the experimentally determined parameters, although improved quantitative fits can be obtained with small parameter adjustments. At the concentrations of enzymes, precursors and products present in cells, the model predicts a thr

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46

Beardsley, S., S. Kunjara, and A. L. Greenbaum. "Enzymes of the pathway of purine synthesis in the rat mammary gland. Changes in the lactation cycle and the effects of diabetes." Biochemical Journal 250, no. 2 (March 1, 1988): 395–99. http://dx.doi.org/10.1042/bj2500395.

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Measurements were made of the activities of the enzymes of the ‘de novo’ and salvage pathways of purine synthesis [phosphoribosyl pyrophosphate amidotransferase (EC 2.4.2.14), adenine phosphoribosyltransferase (EC 2.4.2.7) and hypoxanthine phosphoribosyltranferase (EC 2.4.2.8)] at different stages of the lactation cycle, and the effects of diabetes on the activity of these enzymes in lactation were studied. A distinctive pattern of enzyme change was observed, in which the ‘de novo’ pathway enzyme phosphoribosyl pyrophosphate amidotransferase increased sharply between days 10 and 14 of pregnanc

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47

DAI, Z., Y. YIN, and Z. WANG. "Activities of key enzymes involved in starch synthesis in grains of wheat under different irrigation patterns." Journal of Agricultural Science 147, no. 4 (April 22, 2009): 437–44. http://dx.doi.org/10.1017/s0021859609008612.

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SUMMARYIt is generally accepted that sucrose phosphate synthase (SPS), sucrose synthase (SuSy), ADP-glucose pyrophosphorylase (AGPase), soluble starch synthase (SSS), granule-bound starch synthase (GBSS) and starch branching enzyme (SBE) play a key role in starch synthesis in wheat grains. Starch synthesis in wheat grains is influenced by genotype and environment. However, what is not known is the degree of variation in enzyme activities during starch accumulation of wheat cultivars field-grown in different water regimes. The present study was undertaken to determine whether irrigation pattern

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48

Jo, Seong-Min, Shuai Jiang, Robert Graf, Frederik R. Wurm, and Katharina Landfester. "Aqueous core and hollow silica nanocapsules for confined enzyme modules." Nanoscale 12, no. 47 (2020): 24266–72. http://dx.doi.org/10.1039/d0nr07148j.

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49

Wang, Shan, та Hai Deng. "Peculiarities of promiscuous l-threonine transaldolases for enantioselective synthesis of β-hydroxy-α-amino acids". Applied Microbiology and Biotechnology 105, № 9 (26 квітня 2021): 3507–20. http://dx.doi.org/10.1007/s00253-021-11288-w.

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Abstract The introduction of β-hydroxy-α-amino acids (βHAAs) into organic molecules has received considerable attention as these molecules have often found widespread applications in bioorganic chemistry, medicinal chemistry and biomaterial science. Despite innovation of asymmetric synthesis of βHAAs, stereoselective synthesis to control the two chiral centres at Cα and Cβ positions is still challenging, with poor atomic economy and multi protection and deprotection steps. These syntheses are often operated under harsh conditions. Therefore, a biotransformation approach using biocatalysts is n

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50

Kinami, Yoshio, Ichiro Kita, Yasuhiko Kojima, and Shigeki Takashima. "Pancreatic Exocrine Enzymes and Intrapancreatic Protein Synthesis in Acute Oedematous Pancreatitis." HPB Surgery 8, no. 1 (January 1, 1994): 43–48. http://dx.doi.org/10.1155/1994/25496.

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Changes in serum and intrapancreatic enzyme content and protein synthesis in pancreas were studied in acute oedematous pancreatitis (AOP). Male Wistar rats (n = 111) were divided into 2 groups, controls with a sham operation and those with AOP. Serum amylase levels rose immediately after the procedure causing AOP and then fell gradually, while serum lipase and ribonuclease levels remained higher than control values over 48h. (p < 0.05, 0.01). Serum deoxyribonuclease (DNase) II levels were unchanged. Intrapancreatic enzyme levels were scarcely affected by AOP. 3H-leucine uptake into pancreat

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