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Li XJ, Li Q, Zhan XX, Zhang YJ, Xiong GL, Zheng JY. Expression and characterization of a thermostable lipase from Thermomyces dupontii. CHEMICAL PAPERS 2022. [DOI: 10.1007/s11696-022-02068-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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2
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Entrapment of Phenylalanine Ammonia-Lyase in Nanofibrous Polylactic Acid Matrices by Emulsion Electrospinning. Catalysts 2021. [DOI: 10.3390/catal11101149] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Immobilization of the recombinant, plant-derived Petroselinum crispum phenylalanine ammonia lyase (PcPAL) in electrospun matrices have the potential to create promising, easy-to-use biocatalysts. Polylactic acid (PLA) a biologically inert, commercial biopolymer, was chosen as the material of the carrier system. PLA could be electrospun properly only from water-immiscible organic solvents, which limits its application as a carrier of sensitive biological objects. The emulsion electrospinning is a proper solution to overcome this issue using non-ionic emulsifiers with different hydrophilic-lipophilic balance (HLB) values. The stabilized emulsion could protect the sensitive PcPAL dissolved in the aqueous buffer phase and improve fiber formation, plus help to keep the biocatalytic activity of enzymes. In this study, the first approach is described to produce PLA nanofibers containing PcPAL enzymes by emulsion electrospinning and to use the resulted biocatalyst in the ammonia elimination reaction from l-phenylalanine.
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Maldonado MR, Alnoch RC, de Almeida JM, Santos LAD, Andretta AT, Ropaín RDPC, de Souza EM, Mitchell DA, Krieger N. Key mutation sites for improvement of the enantioselectivity of lipases through protein engineering. Biochem Eng J 2021. [DOI: 10.1016/j.bej.2021.108047] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Yang J, Huang K, Xu X, Miao Y, Lin Y, Han S. Cell Surface Display of Thermomyces lanuginosus Lipase in Pichia pastoris. Front Bioeng Biotechnol 2020; 8:544058. [PMID: 33195113 PMCID: PMC7656992 DOI: 10.3389/fbioe.2020.544058] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Accepted: 09/03/2020] [Indexed: 12/04/2022] Open
Abstract
A cell surface displayed system in Pichia pastoris GS115 was developed by using GCW61, a glycosylphosphatidylinositol-modified cell wall protein from P. pastoris, as the anchor protein. Thermomyces lanuginosus lipase (TLL) was successfully displayed on the P. pastoris cell wall by fusing GCW61 gene with TLL2 gene (NCBI Accession: O59952) that was optimized with codon bias and synthesized. Cell surface displayed TLL2 was confirmed by the immunofluorescence microscopy. Flask fermentation was performed for 144 h with lipase activity up to 1964.76 U/g. Enzymatic properties of cell surface displayed TLL2 were also investigated. Displayed TLL2 occurred the maximum activity at pH 9 and 55°C and demonstrated characteristics of wide thermal adaptability and alkaline pH resistance. The optimum substrate was p-nitrophenyl hexanoate. Bivalent metal ions Ca2+, Mn2+, and Zn2+ had the activation effect on displayed TLL2, while Cu2+, Fe2+, Fe3+, K+, Li+, Na+, and Co2+ ions had the inhibitory effect on it. Since cell surface displayed TLL2 required less purification steps compared with free enzyme and showed high enzyme activities, it would be able to be further applied in various potential applications.
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Affiliation(s)
- Jiaming Yang
- Guangdong Key Laboratory of Fermentation and Enzyme Engineering, School of Biology and Biological Engineering, South China University of Technology, Guangzhou, China
| | - Kui Huang
- Guangdong Key Laboratory of Fermentation and Enzyme Engineering, School of Biology and Biological Engineering, South China University of Technology, Guangzhou, China
| | - Xiaomin Xu
- Guangdong Key Laboratory of Fermentation and Enzyme Engineering, School of Biology and Biological Engineering, South China University of Technology, Guangzhou, China
| | - Yangli Miao
- Guangdong Key Laboratory of Fermentation and Enzyme Engineering, School of Biology and Biological Engineering, South China University of Technology, Guangzhou, China
| | - Ying Lin
- Guangdong Key Laboratory of Fermentation and Enzyme Engineering, School of Biology and Biological Engineering, South China University of Technology, Guangzhou, China
| | - Shuangyan Han
- Guangdong Key Laboratory of Fermentation and Enzyme Engineering, School of Biology and Biological Engineering, South China University of Technology, Guangzhou, China
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Advances in Recombinant Lipases: Production, Engineering, Immobilization and Application in the Pharmaceutical Industry. Catalysts 2020. [DOI: 10.3390/catal10091032] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Lipases are one of the most used enzymes in the pharmaceutical industry due to their efficiency in organic syntheses, mainly in the production of enantiopure drugs. From an industrial viewpoint, the selection of an efficient expression system and host for recombinant lipase production is highly important. The most used hosts are Escherichia coli and Komagataella phaffii (previously known as Pichia pastoris) and less often reported Bacillus and Aspergillus strains. The use of efficient expression systems to overproduce homologous or heterologous lipases often require the use of strong promoters and the co-expression of chaperones. Protein engineering techniques, including rational design and directed evolution, are the most reported strategies for improving lipase characteristics. Additionally, lipases can be immobilized in different supports that enable improved properties and enzyme reuse. Here, we review approaches for strain and protein engineering, immobilization and the application of lipases in the pharmaceutical industry.
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Abstract
Microbial lipases represent one of the most important groups of biotechnological biocatalysts. However, the high-level production of lipases requires an understanding of the molecular mechanisms of gene expression, folding, and secretion processes. Stable, selective, and productive lipase is essential for modern chemical industries, as most lipases cannot work in different process conditions. However, the screening and isolation of a new lipase with desired and specific properties would be time consuming, and costly, so researchers typically modify an available lipase with a certain potential for minimizing cost. Improving enzyme properties is associated with altering the enzymatic structure by changing one or several amino acids in the protein sequence. This review detailed the main sources, classification, structural properties, and mutagenic approaches, such as rational design (site direct mutagenesis, iterative saturation mutagenesis) and direct evolution (error prone PCR, DNA shuffling), for achieving modification goals. Here, both techniques were reviewed, with different results for lipase engineering, with a particular focus on improving or changing lipase specificity. Changing the amino acid sequences of the binding pocket or lid region of the lipase led to remarkable enzyme substrate specificity and enantioselectivity improvement. Site-directed mutagenesis is one of the appropriate methods to alter the enzyme sequence, as compared to random mutagenesis, such as error-prone PCR. This contribution has summarized and evaluated several experimental studies on modifying the substrate specificity of lipases.
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Zhang Q, Lu X, Zhang Y, Tang X, Zheng R, Zheng Y. Development of a robust nitrilase by fragment swapping and semi‐rational design for efficient biosynthesis of pregabalin precursor. Biotechnol Bioeng 2019; 117:318-329. [DOI: 10.1002/bit.27203] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Revised: 10/06/2019] [Accepted: 10/13/2019] [Indexed: 01/20/2023]
Affiliation(s)
- Qin Zhang
- Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and BioengineeringZhejiang University of TechnologyHangzhou China
- Engineering Research Center of Bioconversion and Biopurification of Ministry of EducationZhejiang University of TechnologyHangzhou China
| | - Xia‐Feng Lu
- Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and BioengineeringZhejiang University of TechnologyHangzhou China
- Engineering Research Center of Bioconversion and Biopurification of Ministry of EducationZhejiang University of TechnologyHangzhou China
| | - Yan Zhang
- Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and BioengineeringZhejiang University of TechnologyHangzhou China
- Engineering Research Center of Bioconversion and Biopurification of Ministry of EducationZhejiang University of TechnologyHangzhou China
| | - Xiao‐Ling Tang
- Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and BioengineeringZhejiang University of TechnologyHangzhou China
- Engineering Research Center of Bioconversion and Biopurification of Ministry of EducationZhejiang University of TechnologyHangzhou China
| | - Ren‐Chao Zheng
- Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and BioengineeringZhejiang University of TechnologyHangzhou China
- Engineering Research Center of Bioconversion and Biopurification of Ministry of EducationZhejiang University of TechnologyHangzhou China
| | - Yu‐Guo Zheng
- Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and BioengineeringZhejiang University of TechnologyHangzhou China
- Engineering Research Center of Bioconversion and Biopurification of Ministry of EducationZhejiang University of TechnologyHangzhou China
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Zhang Q, Wu ZM, Liu S, Tang XL, Zheng RC, Zheng YG. Efficient Chemoenzymatic Synthesis of Optically Active Pregabalin from Racemic Isobutylsuccinonitrile. Org Process Res Dev 2019. [DOI: 10.1021/acs.oprd.9b00285] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Efficient Biocatalytic Synthesis of Chiral Intermediate of Pregabalin Using Immobilized Talaromyces thermophilus Lipase. BIOMED RESEARCH INTERNATIONAL 2018; 2018:6192059. [PMID: 30515409 PMCID: PMC6236560 DOI: 10.1155/2018/6192059] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Revised: 09/10/2018] [Accepted: 10/15/2018] [Indexed: 11/17/2022]
Abstract
A mutant L206F/P207F/L259F of Talaromyces thermophilus lipase (TTL) exhibited high hydrolytic activity towards 2-carboxyethyl-3-cyano-5-methylhexanoic acid ethyl ester (CNDE) for synthesis of (S)-2-carboxyethyl-3-cyano-5-methylhexanoic acid (S-CCMA), a key chiral intermediate of pregabalin. However, low conversion at high CNDE concentration and unreusability of the free TTL mutant restricted its industrial applications. In this study, the TTL mutant was immobilized onto epoxy resin and its catalytic properties for kinetic resolution of CNDE were investigated. Under the optimized conditions, the immobilized lipase exhibited an increased catalytic efficiency even at a CNDE concentration of 3 M with 49.7% conversion and 95% ee p. The conversion retained higher than 46.3% even after 10 times repeated use of the immobilized lipase in n-heptane-water biphasic system. These results demonstrated great potential of the immobilized TTL mutant for industrial production of the chiral intermediate of pregabalin.
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Integrating enzyme immobilization and protein engineering: An alternative path for the development of novel and improved industrial biocatalysts. Biotechnol Adv 2018; 36:1470-1480. [DOI: 10.1016/j.biotechadv.2018.06.002] [Citation(s) in RCA: 168] [Impact Index Per Article: 28.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Revised: 05/02/2018] [Accepted: 06/04/2018] [Indexed: 12/15/2022]
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Ding X, Zheng RC, Tang XL, Zheng YG. Engineering of Talaromyces thermophilus lipase by altering its crevice-like binding site for highly efficient biocatalytic synthesis of chiral intermediate of Pregablin. Bioorg Chem 2018; 77:330-338. [DOI: 10.1016/j.bioorg.2018.01.018] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2017] [Revised: 01/10/2018] [Accepted: 01/11/2018] [Indexed: 02/02/2023]
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Sarmah N, Revathi D, Sheelu G, Yamuna Rani K, Sridhar S, Mehtab V, Sumana C. Recent advances on sources and industrial applications of lipases. Biotechnol Prog 2017; 34:5-28. [DOI: 10.1002/btpr.2581] [Citation(s) in RCA: 172] [Impact Index Per Article: 24.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Revised: 10/18/2017] [Indexed: 12/13/2022]
Affiliation(s)
- Nipon Sarmah
- Chemical Engineering Div.; CSIR-Indian Institute of Chemical Technology; Hyderabad 500007 India
- Academy of Scientific and Innovative Research (AcSIR); Chennai 600 113 India
| | - D. Revathi
- Chemical Engineering Div.; CSIR-Indian Institute of Chemical Technology; Hyderabad 500007 India
| | - G. Sheelu
- Medicinal Chemistry and Pharmacology Div.; CSIR-Indian Institute of Chemical Technology; Hyderabad 500007 India
| | - K. Yamuna Rani
- Chemical Engineering Div.; CSIR-Indian Institute of Chemical Technology; Hyderabad 500007 India
| | - S. Sridhar
- Chemical Engineering Div.; CSIR-Indian Institute of Chemical Technology; Hyderabad 500007 India
| | - V. Mehtab
- Chemical Engineering Div.; CSIR-Indian Institute of Chemical Technology; Hyderabad 500007 India
| | - C. Sumana
- Chemical Engineering Div.; CSIR-Indian Institute of Chemical Technology; Hyderabad 500007 India
- Academy of Scientific and Innovative Research (AcSIR); Chennai 600 113 India
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Tian K, Tai K, Chua BJW, Li Z. Directed evolution of Thermomyces lanuginosus lipase to enhance methanol tolerance for efficient production of biodiesel from waste grease. BIORESOURCE TECHNOLOGY 2017; 245:1491-1497. [PMID: 28571627 DOI: 10.1016/j.biortech.2017.05.108] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2017] [Revised: 05/16/2017] [Accepted: 05/17/2017] [Indexed: 06/07/2023]
Abstract
Engineering a methanol tolerant lipase is of great importance in biodiesel production. Here, the first semi-rational method for directed enzyme evolution to enhance methanol tolerance by targeting high B-factor residues for iterative saturation mutagenesis (ISM) is reported. The best double mutant, TLL-S105C/D27R, retained 71% of its original activity after incubation in methanol, showing 30% greater methanol tolerance than TLL. TLL-S105C/D27R also displayed 27% higher activity over TLL. Structure modelling suggested that the increased stability of TLL-S105C/D27R was caused by the formation of a new hydrogen bond which stabilized the protein structure. E. coli (TLL-S105C/D27R)-catalyzed biotransformation of waste grease produced biodiesel in 81% yield in 8h, showing improvement over the 67% yield for E. coli (TLL), while retaining 92% productivity after 4 cycles of biotransformation of waste grease. The engineered TLL mutant shows high potential for commercial biodiesel production.
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Affiliation(s)
- Kaiyuan Tian
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117585, Singapore
| | - Kee Tai
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117585, Singapore
| | - Bryan Jian Wei Chua
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117585, Singapore
| | - Zhi Li
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117585, Singapore.
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Yang B, Wang H, Song W, Chen X, Liu J, Luo Q, Liu L. Engineering of the Conformational Dynamics of Lipase To Increase Enantioselectivity. ACS Catal 2017. [DOI: 10.1021/acscatal.7b02404] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Bin Yang
- State
Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China
- Key
Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China
| | - Hongjiang Wang
- State
Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China
- Key
Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China
| | - Wei Song
- State
Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China
- Key
Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China
| | - Xiulai Chen
- State
Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China
- Key
Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China
| | - Jia Liu
- State
Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China
- Key
Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China
| | - Qiuling Luo
- State
Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China
- Key
Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China
| | - Liming Liu
- State
Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China
- Key
Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China
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Wu J, Wang H, Yang B, Song W, Liang C, Liu L. Efficient production of (R)-3-TBDMSO glutaric acid methyl monoester by manipulating the substrate pocket of Pseudozyma antarctica lipase B. RSC Adv 2017. [DOI: 10.1039/c7ra06016e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Efficient production of optically pure (R)-3-substituted glutaric acid methyl monoesters, the multifunctional chiral building blocks used in the pharmaceutical industry, by manipulating the substrate pocket of Pseudozyma antarctica lipase B.
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Affiliation(s)
- Jing Wu
- School of Pharmaceutical Sciences
- Jiangnan University
- Wuxi
- China
- The Key Laboratory of Industrial Biotechnology
| | - Hongjiang Wang
- The Key Laboratory of Industrial Biotechnology
- Ministry of Education
- Jiangnan University
- Wuxi
- China
| | - Bin Yang
- The Key Laboratory of Industrial Biotechnology
- Ministry of Education
- Jiangnan University
- Wuxi
- China
| | - Wei Song
- The Key Laboratory of Industrial Biotechnology
- Ministry of Education
- Jiangnan University
- Wuxi
- China
| | - Chenchen Liang
- School of Pharmaceutical Sciences
- Jiangnan University
- Wuxi
- China
- The Key Laboratory of Industrial Biotechnology
| | - Liming Liu
- The Key Laboratory of Industrial Biotechnology
- Ministry of Education
- Jiangnan University
- Wuxi
- China
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Enhanced activity of Thermomyces lanuginosus lipase by site-saturation mutagenesis for efficient biosynthesis of chiral intermediate of pregabalin. Biochem Eng J 2016. [DOI: 10.1016/j.bej.2016.05.007] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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18
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Recent Advances in Lipase-Mediated Preparation of Pharmaceuticals and Their Intermediates. Int J Mol Sci 2015; 16:29682-716. [PMID: 26690428 PMCID: PMC4691134 DOI: 10.3390/ijms161226191] [Citation(s) in RCA: 95] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Revised: 11/04/2015] [Accepted: 11/04/2015] [Indexed: 01/26/2023] Open
Abstract
Biocatalysis offers an alternative approach to conventional chemical processes for the production of single-isomer chiral drugs. Lipases are one of the most used enzymes in the synthesis of enantiomerically pure intermediates. The use of this type of enzyme is mainly due to the characteristics of their regio-, chemo- and enantioselectivity in the resolution process of racemates, without the use of cofactors. Moreover, this class of enzymes has generally excellent stability in the presence of organic solvents, facilitating the solubility of the organic substrate to be modified. Further improvements and new applications have been achieved in the syntheses of biologically active compounds catalyzed by lipases. This review critically reports and discusses examples from recent literature (2007 to mid-2015), concerning the synthesis of enantiomerically pure active pharmaceutical ingredients (APIs) and their intermediates in which the key step involves the action of a lipase.
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Xu F, Chen S, Xu G, Wu J, Yang L. Discovery and expression of a Pseudomonas sp. esterase as a novel biocatalyst for the efficient biosynthesis of a chiral intermediate of pregabalin. BIOTECHNOL BIOPROC E 2015. [DOI: 10.1007/s12257-015-0069-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Hydrophobic Mutagenesis and Semi-rational Engineering of Arginine Deiminase for Markedly Enhanced Stability and Catalytic Efficiency. Appl Biochem Biotechnol 2015; 176:1335-50. [DOI: 10.1007/s12010-015-1649-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2015] [Accepted: 04/21/2015] [Indexed: 12/17/2022]
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Li XJ, Zheng RC, Ma HY, Huang JF, Zheng YG. Key residues responsible for enhancement of catalytic efficiency of Thermomyces lanuginosus lipase Lip revealed by complementary protein engineering strategy. J Biotechnol 2014; 188:29-35. [DOI: 10.1016/j.jbiotec.2014.08.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2014] [Revised: 07/25/2014] [Accepted: 08/01/2014] [Indexed: 01/13/2023]
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22
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Li XJ, Zheng RC, Wu ZM, Ding X, Zheng YG. Thermophilic esterase from Thermomyces lanuginosus: Molecular cloning, functional expression and biochemical characterization. Protein Expr Purif 2014; 101:1-7. [DOI: 10.1016/j.pep.2014.05.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2014] [Revised: 05/07/2014] [Accepted: 05/12/2014] [Indexed: 12/26/2022]
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