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The Power of Biocatalysts for Highly Selective and Efficient Phosphorylation Reactions. Catalysts 2022. [DOI: 10.3390/catal12111436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Reactions involving the transfer of phosphorus-containing groups are of key importance for maintaining life, from biological cells, tissues and organs to plants, animals, humans, ecosystems and the whole planet earth. The sustainable utilization of the nonrenewable element phosphorus is of key importance for a balanced phosphorus cycle. Significant advances have been achieved in highly selective and efficient biocatalytic phosphorylation reactions, fundamental and applied aspects of phosphorylation biocatalysts, novel phosphorylation biocatalysts, discovery methodologies and tools, analytical and synthetic applications, useful phosphoryl donors and systems for their regeneration, reaction engineering, product recovery and purification. Biocatalytic phosphorylation reactions with complete conversion therefore provide an excellent reaction platform for valuable analytical and synthetic applications.
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2
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Křen V, Kroutil W, Hall M. A Career in Biocatalysis: Kurt Faber. ACS Catal 2022. [DOI: 10.1021/acscatal.2c00579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Vladimir Křen
- Institute of Microbiology, Czech Academy of Sciences, Laboratory of Biotransformation, 14220 Prague, Czech Republic
| | - Wolfgang Kroutil
- Institute of Chemistry, University of Graz, 8010 Graz, Austria
- Field of Excellence BioHealth, University of Graz, 8010 Graz, Austria
- BioTechMed, University of Graz, 8010 Graz, Austria
| | - Mélanie Hall
- Institute of Chemistry, University of Graz, 8010 Graz, Austria
- Field of Excellence BioHealth, University of Graz, 8010 Graz, Austria
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3
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Design and construction of chimeric linker library with controllable flexibilities for precision protein engineering. Methods Enzymol 2020; 647:23-49. [PMID: 33482990 DOI: 10.1016/bs.mie.2020.12.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Linkers play essential roles in the engineering of fusion proteins, and have been extensively demonstrated to affect protein properties such as expression level, solubility, and biological functions. For linker design and optimization, one of the key factors is the flexibility or rigidity of linkers, which describes the tendency of a linker to maintain a stable conformation when expressed, and can directly contribute to the physical distance between domains of a fusion protein. In this chapter, we discuss the design and engineering of linkers in fusion proteins, and describe a library-based method for optimization of linker flexibility. This approach is based on chimeric linkers, which are composed of both flexible and rigid (helix-forming) linker motifs. We demonstrate that the chimeric linker library capable of controlling the flexibility in a wide range can fill the gap between flexible and rigid linkers by molecular dynamics simulation and fluorescence resonance energy transfer experiments, as well as its applications in fusion protein optimization.
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4
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Klimacek M, Sigg A, Nidetzky B. On the donor substrate dependence of group-transfer reactions by hydrolytic enzymes: Insight from kinetic analysis of sucrose phosphorylase-catalyzed transglycosylation. Biotechnol Bioeng 2020; 117:2933-2943. [PMID: 32573774 PMCID: PMC7540478 DOI: 10.1002/bit.27471] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Revised: 06/15/2020] [Accepted: 06/21/2020] [Indexed: 12/30/2022]
Abstract
Chemical group-transfer reactions by hydrolytic enzymes have considerable importance in biocatalytic synthesis and are exploited broadly in commercial-scale chemical production. Mechanistically, these reactions have in common the involvement of a covalent enzyme intermediate which is formed upon enzyme reaction with the donor substrate and is subsequently intercepted by a suitable acceptor. Here, we studied the glycosylation of glycerol from sucrose by sucrose phosphorylase (SucP) to clarify a peculiar, yet generally important characteristic of this reaction: partitioning between glycosylation of glycerol and hydrolysis depends on the type and the concentration of the donor substrate used (here: sucrose, α-d-glucose 1-phosphate (G1P)). We develop a kinetic framework to analyze the effect and provide evidence that, when G1P is used as donor substrate, hydrolysis occurs not only from the β-glucosyl-enzyme intermediate (E-Glc), but additionally from a noncovalent complex of E-Glc and substrate which unlike E-Glc is unreactive to glycerol. Depending on the relative rates of hydrolysis of free and substrate-bound E-Glc, inhibition (Leuconostoc mesenteroides SucP) or apparent activation (Bifidobacterium adolescentis SucP) is observed at high donor substrate concentration. At a G1P concentration that excludes the substrate-bound E-Glc, the transfer/hydrolysis ratio changes to a value consistent with reaction exclusively through E-Glc, independent of the donor substrate used. Collectively, these results give explanation for a kinetic behavior of SucP not previously accounted for, provide essential basis for design and optimization of the synthetic reaction, and establish a theoretical framework for the analysis of kinetically analogous group-transfer reactions by hydrolytic enzymes.
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Affiliation(s)
- Mario Klimacek
- Institute of Biotechnology and Biochemical Engineering, Graz University of Technology, NAWI Graz, Graz, Austria
| | - Alexander Sigg
- Institute of Biotechnology and Biochemical Engineering, Graz University of Technology, NAWI Graz, Graz, Austria
| | - Bernd Nidetzky
- Institute of Biotechnology and Biochemical Engineering, Graz University of Technology, NAWI Graz, Graz, Austria.,Austrian Centre of Industrial Biotechnology (acib), Graz, Austria
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5
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Gudiño ED, Santillán JY, Iglesias LE, Iribarren AM. An enzymatic alternative for the synthesis of nucleoside 5'-monophosphates. Enzyme Microb Technol 2017; 111:1-6. [PMID: 29421031 DOI: 10.1016/j.enzmictec.2017.12.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Revised: 11/16/2017] [Accepted: 12/18/2017] [Indexed: 10/18/2022]
Abstract
A new procedure was carried out for the synthesis of nucleoside 5'-monophosphates, involving the use of two enzymes. The first step applied phospholipase D from Streptomyces netropsis and phosphatidylcholine as phosphatidyl donor, to give 5'-(3-sn-phosphatidyl) nucleosides (C, U, A, I). These were selectively hydrolysed in the second step by the action of phospholipase C from Bacillus cereus to produce the respective 5'-nucleotides. Application of this methodology on a preparative scale conducted to 5'-adenosine monophosphate in 63% overall yield from adenosine. The regioselectivity of these enzymes avoids protection steps, the overall synthesis is performed under mild reaction conditions and product isolation is easily achieved.
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Affiliation(s)
- Esteban D Gudiño
- Laboratorio de Biotransformaciones, Departamento de Ciencia y Tecnología, Universidad Nacional de Quilmes, Roque Sáenz Peña 352-(1876) Bernal, Provincia de Buenos Aires, Argentina
| | - Julia Y Santillán
- Laboratorio de Biotransformaciones, Departamento de Ciencia y Tecnología, Universidad Nacional de Quilmes, Roque Sáenz Peña 352-(1876) Bernal, Provincia de Buenos Aires, Argentina
| | - Luis E Iglesias
- Laboratorio de Biotransformaciones, Departamento de Ciencia y Tecnología, Universidad Nacional de Quilmes, Roque Sáenz Peña 352-(1876) Bernal, Provincia de Buenos Aires, Argentina
| | - Adolfo M Iribarren
- Laboratorio de Biotransformaciones, Departamento de Ciencia y Tecnología, Universidad Nacional de Quilmes, Roque Sáenz Peña 352-(1876) Bernal, Provincia de Buenos Aires, Argentina.
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6
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Tasnádi G, Zechner M, Hall M, Baldenius K, Ditrich K, Faber K. Investigation of acid phosphatase variants for the synthesis of phosphate monoesters. Biotechnol Bioeng 2017; 114:2187-2195. [DOI: 10.1002/bit.26352] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2017] [Revised: 05/18/2017] [Accepted: 06/05/2017] [Indexed: 01/18/2023]
Affiliation(s)
- Gábor Tasnádi
- Austrian Centre of Industrial Biotechnology, c/o
- Department of Chemistry; Organic & Bioorganic Chemistry; University of Graz; Heinrichstrasse 28 8010 Graz Austria
| | - Michaela Zechner
- Department of Chemistry; Organic & Bioorganic Chemistry; University of Graz; Heinrichstrasse 28 8010 Graz Austria
| | - Mélanie Hall
- Department of Chemistry; Organic & Bioorganic Chemistry; University of Graz; Heinrichstrasse 28 8010 Graz Austria
| | - Kai Baldenius
- White Biotechnology Research Biocatalysis; BASF SE; Ludwigshafen 67056 Germany
| | - Klaus Ditrich
- White Biotechnology Research Biocatalysis; BASF SE; Ludwigshafen 67056 Germany
| | - Kurt Faber
- Department of Chemistry; Organic & Bioorganic Chemistry; University of Graz; Heinrichstrasse 28 8010 Graz Austria
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7
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Tasnádi G, Hall M, Baldenius K, Ditrich K, Faber K. Biocatalytic functionalization of hydroxyalkyl acrylates and phenoxyethanol via phosphorylation. J Biotechnol 2016; 233:219-27. [DOI: 10.1016/j.jbiotec.2016.07.009] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2016] [Revised: 07/08/2016] [Accepted: 07/11/2016] [Indexed: 11/25/2022]
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8
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A study on the effects of linker flexibility on acid phosphatase PhoC-GFP fusion protein using a novel linker library. Enzyme Microb Technol 2016; 83:1-6. [DOI: 10.1016/j.enzmictec.2015.11.002] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2015] [Revised: 10/30/2015] [Accepted: 11/08/2015] [Indexed: 12/19/2022]
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9
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Qian Y, Ding Q, Li Y, Zou Z, Yan B, Ou L. Phosphorylation of uridine and cytidine by uridine–cytidine kinase. J Biotechnol 2014; 188:81-7. [DOI: 10.1016/j.jbiotec.2014.08.018] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2014] [Revised: 08/10/2014] [Accepted: 08/18/2014] [Indexed: 10/24/2022]
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10
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A comparative study on phosphotransferase activity of acid phosphatases from Raoultella planticola and Enterobacter aerogenes on nucleosides, sugars, and related compounds. Appl Microbiol Biotechnol 2013; 98:3013-22. [DOI: 10.1007/s00253-013-5194-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2013] [Accepted: 08/11/2013] [Indexed: 10/26/2022]
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11
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Huang Z, Zhang C, Chen S, Ye F, Xing XH. Active inclusion bodies of acid phosphatase PhoC: aggregation induced by GFP fusion and activities modulated by linker flexibility. Microb Cell Fact 2013; 12:25. [PMID: 23497261 PMCID: PMC3608069 DOI: 10.1186/1475-2859-12-25] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2012] [Accepted: 03/01/2013] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Biologically active inclusion bodies (IBs) have gained much attention in recent years. Fusion with IB-inducing partner has been shown to be an efficient strategy for generating active IBs. To make full use of the advantages of active IBs, one of the key issues will be to improve the activity yield of IBs when expressed in cells, which would need more choices on IB-inducing fusion partners and approaches for engineering IBs. Green fluorescent protein (GFP) has been reported to aggregate when overexpressed, but GFP fusion has not been considered as an IB-inducing approach for these fusion proteins so far. In addition, the role of linker in fusion proteins has been shown to be important for protein characteristics, yet impact of linker on active IBs has never been reported. RESULTS Here we report that by fusing GFP and acid phosphatase PhoC via a linker region, the resultant PhoC-GFPs were expressed largely as IBs. These IBs show high levels of specific fluorescence and specific PhoC activities (phosphatase and phosphotransferase), and can account for up to over 80% of the total PhoC activities in the cells. We further demonstrated that the aggregation of GFP moiety in the fusion protein plays an essential role in the formation of PhoC-GFP IBs. In addition, PhoC-GFP IBs with linkers of different flexibility were found to exhibit different levels of activities and ratios in the cells, suggesting that the linker region can be utilized to manipulate the characteristics of active IBs. CONCLUSIONS Our results show that active IBs of PhoC can be generated by GFP fusion, demonstrating for the first time the potential of GFP fusion to induce active IB formation of another soluble protein. We also show that the linker sequence in PhoC-GFP fusion proteins plays an important role on the regulation of IB characteristics, providing an alternative and important approach for engineering of active IBs with the goal of obtaining high activity yield of IBs.
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Affiliation(s)
- Ziliang Huang
- Key Laboratory for Industrial Biocatalysis, Ministry of Education, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, China
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12
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Enzymatic production of L-alanyl-L-glutamine by recombinant E. coli expressing α-amino acid ester acyltransferase from Sphingobacterium siyangensis. Biosci Biotechnol Biochem 2013; 77:618-23. [PMID: 23470770 DOI: 10.1271/bbb.120859] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
An enzymatic production method for synthesizing L-alanyl-L-glutamine (Ala-Gln) from L-alanine methyl ester hydrochloride (AlaOMe) and L-glutamine (Gln) was developed in this study. The cultivation conditions for an Escherichia coli strain overexpressing α-amino acid ester acyltransferase from Sphingobacterium siyangensis AJ 2458 (SAET) and reaction conditions for Ala-Gln production were optimized. A high cell density culture broth prepared by fed-batch cultivation showed 440 units/mL of Ala-Gln-producing activity. In addition, an Ala-Gln-producing reaction using intact E. coli cells overexpressing SAET under optimum conditions was conducted. A total Ala-Gln yield of 69.7 g/L was produced in 40 min. The molar yield was 67% against both AlaOMe and Gln.
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13
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Enzymatic production of 5'-inosinic acid by a newly synthesised acid phosphatase/phosphotransferase. Food Chem 2012; 134:948-56. [PMID: 23107712 DOI: 10.1016/j.foodchem.2012.02.213] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2011] [Revised: 02/13/2012] [Accepted: 02/29/2012] [Indexed: 11/20/2022]
Abstract
5'-Nucleotides including 5'-inosinic acid have characteristic taste and important application in various foods as flavour potentiators. The selective nucleoside acid phosphatase/phosphotransferase (AP/PTase) can catalyse the synthesis of 5'-nucleotides by transfer of phosphate groups. In this study, a 747-bp gene encoding AP/PTase from Escherichia blattae was synthesised. After expression, the recombinant AP/PTase was purified using nickel-NTA. The optimal temperature and pH of this enzyme were 30°C and 5.0, respectively. The activity was partially inhibited by metal ions such as Hg(2+), Ag(+) and Cu(2+), but not by chelating reagents such as EDTA. The values of K(m) and V(max) for inosine were 40 mM and 3.5 U/mg, respectively. Using this purified enzyme, 16.83 mM of 5'-IMP was synthesised from 37 mM of inosine and the molar yield reached 45.5%. Homology modelling and docking simulation were discussed.
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14
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Suzuki EI, Ishikawa K, Mihara Y, Shimba N, Asano Y. Structural-Based Engineering for Transferases to Improve the Industrial Production of 5′-Nucleotides. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2007. [DOI: 10.1246/bcsj.80.276] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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15
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Dissing K, Uerkvitz W. Class B nonspecific acid phosphatase from Salmonella typhimurium LT2. Enzyme Microb Technol 2006. [DOI: 10.1016/j.enzmictec.2005.08.026] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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16
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Mihara Y, Utagawa T, Yamada H, Asano Y. Acid phosphatase/phosphotransferases from enteric bacteria. J Biosci Bioeng 2005; 92:50-4. [PMID: 16233057 DOI: 10.1263/jbb.92.50] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2001] [Accepted: 04/16/2001] [Indexed: 11/17/2022]
Abstract
We have investigated the enzymatic phosphorylation of nucleosides and found that Morganella morganii phoC acid phosphatase exhibits regioselective pyrophosphate (PP(i))-nucleoside phosphotransferase activity. In this study, we isolated genes encoding an acid phosphatase with regioselective phosphotransferase activity (AP/PTase) from Providencia stuartii, Enterobacter aerogenes, Escherichia blattae and Klebsiella planticola, and compared the primary structures and enzymatic characteristics of these enzymes with those of AP/PTase (PhoC acid phosphatase) from M. morganii. The enzymes were highly homologous in primary structure with M. morganii AP/PTase, and are classified as class A1 acid phosphatases. The synthesis of inosine-5'-monophosphate (5'-IMP) by E. coli overproducing each acid phosphatase was investigated. The P. stuartii enzyme, which is most closely related to the M. morganii enzyme, exhibited high 5'-IMP productivity, similar to the M. morganii enzyme. The 5'-IMP productivities of the E. aerogenes, E. blattae and K. planticola enzymes were inferior to those of the former two enzymes. This result underlines the importance of lower K(m) values for efficient nucleotide production. As these enzymes exhibited a very high degree of homology at the amino acid sequence level, it is likely that local sequence differences in the binding pocket are responsible for the differences in the nucleoside-PP(i) phosphotransferase reaction.
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Affiliation(s)
- Y Mihara
- Applied Microbiology Laboratory, Ajinomoto Co., Inc., 1-1 Suzuki-cho, Kawasaki-ku, Kawasaki-shi 210-8681, Japan.
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17
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Ogawa J, Shimizu S. Industrial microbial enzymes: their discovery by screening and use in large-scale production of useful chemicals in Japan. Curr Opin Biotechnol 2002; 13:367-75. [PMID: 12323360 DOI: 10.1016/s0958-1669(02)00331-2] [Citation(s) in RCA: 76] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The application of microbial enzymes to large-scale organic synthesis is currently attracting much attention, and has been uniquely developed especially in Japan. The discovery of new microbial enzymes through extensive and persistent screening has brought about many new and simple routes for synthetic processes. The application of these enzymes in so-called 'hybrid processes' of enzymatic and chemical reactions, provide one possible way to solve environmental problems.
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Affiliation(s)
- Jun Ogawa
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, 606-8502, Kyoto, Japan
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18
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Ishikawa K, Mihara Y, Shimba N, Ohtsu N, Kawasaki H, Suzuki EI, Asano Y. Enhancement of nucleoside phosphorylation activity in an acid phosphatase. Protein Eng Des Sel 2002; 15:539-43. [PMID: 12200535 DOI: 10.1093/protein/15.7.539] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Escherichia blattae non-specific acid phosphatase (EB-NSAP) possesses a pyrophosphate-nucleoside phosphotransferase activity, which is C-5'-position selective. Current mutational and structural data were used to generate a mutant EB-NSAP for a potential industrial application as an effective and economical protein catalyst in synthesizing nucleotides from nucleosides. First, Gly74 and Ile153 were replaced by Asp and Thr, respectively, since the corresponding replacements in the homologous enzyme from Morganella morganii reduced the K(m) value for inosine and thus increased the productivity of 5'-IMP. We determined the crystal structure of G74D/I153T, which has a reduced K(m) value for inosine, as expected. The tertiary structure of G74D/I153T was virtually identical to that of the wild-type. In addition, neither of the introduced side chains of Asp74 and Thr153 is directly involved in the interaction with inosine in a hypothetical binding mode of inosine to EB-NSAP, although both residues are situated near a potential inosine-binding site. These findings suggested that a slight structural change caused by an amino acid replacement around the potential inosine-binding site could significantly reduce the K(m) value. Prompted by this hypothesis, we designed several mutations and introduced them to G74D/I153T, to decrease the K(m) value further. This strategy produced a S72F/G74D/I153T mutant with a 5.4-fold lower K(m) value and a 2.7-fold higher V(max) value as compared to the wild-type EB-NSAP.
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Affiliation(s)
- Kohki Ishikawa
- Central Research Laboratories, Ajinomoto Co., Inc., 1-1 Suzuki-cho Kawasaki-ku, Kawasaki 210-868, Japan
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19
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Asano Y. Overview of screening for new microbial catalysts and their uses in organic synthesis--selection and optimization of biocatalysts. J Biotechnol 2002; 94:65-72. [PMID: 11792452 DOI: 10.1016/s0168-1656(01)00419-9] [Citation(s) in RCA: 76] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
As a typical example of screening for a microbial biocatalyst from nature, isolation of aldoxime-degrading microorganisms, characterization of a new enzyme phenylacetaldoxime dehydratase, and application of this enzyme to nitrile synthesis are described. The pathway in which aldoximes are successively degraded via nitrile in microorganisms could be named as 'aldoxime-nitrile pathway'. As an example of a post-screening procedure, a directed molecular evolution technique was successfully used to change the properties of nucleoside pyrophosphate phosphotransferase to make it suitable for synthesis of inosine-5'-monophosphate (5'-IMP). With the mutant enzyme, the efficiency of the production of 5'-IMP, a food additive, was much improved.
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Affiliation(s)
- Yasuhisa Asano
- Biotechnology Research Center, Toyama Prefectural University, 5180 Kurokawa, Kosugi, Toyama 939-0398, Japan.
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20
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Establishment of a mass-production system for NADP using bacterial inorganic polyphosphate/ATP-NAD kinase. J Biosci Bioeng 2001. [DOI: 10.1016/s1389-1723(01)80294-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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21
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Mihara Y, Utagawa T, Yamada H, Asano Y. Acid phosphatase/phosphotransferases from enteric bacteria. J Biosci Bioeng 2001. [DOI: 10.1016/s1389-1723(01)80198-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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22
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Mihara Y, Utagawa T, Yamada H, Asano Y. Phosphorylation of nucleosides by the mutated acid phosphatase from Morganella morganii. Appl Environ Microbiol 2000; 66:2811-6. [PMID: 10877772 PMCID: PMC92077 DOI: 10.1128/aem.66.7.2811-2816.2000] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
A novel nucleoside phosphorylation process using the food additive pyrophosphate as the phosphate source was investigated. The Morganella morganii gene encoding a selective nucleoside pyrophosphate phosphotransferase was cloned. It was identical to the M. morganii PhoC acid phosphatase gene. Sequential in vitro random mutagenesis was performed on the gene by error-prone PCR to construct a mutant library. The mutant library was introduced into Escherichia coli, and the transformants were screened for the production of 5'-IMP. One mutated acid phosphatase with an increased phosphotransferase reaction yield was obtained. With E. coli overproducing the mutated acid phosphatase, 101 g of 5'-IMP per liter (192 mM) was synthesized from inosine in an 88% molar yield. This improvement was achieved with two mutations, Gly to Asp at position 92 and Ile to Thr at position 171. A decreased K(m) value for inosine was responsible for the increased productivity.
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Affiliation(s)
- Y Mihara
- Applied Microbiology Laboratory, Fermentation and Biotechnology Laboratories, Ajinomoto Co., Inc., Kawasaki-ku, Kawasaki-shi 210-8681, Japan.
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23
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Hashimoto SI, Ozaki A. Whole microbial cell processes for manufacturing amino acids, vitamins or ribonucleotides. Curr Opin Biotechnol 1999; 10:604-8. [PMID: 10600687 DOI: 10.1016/s0958-1669(99)00041-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
The development of recombinant DNA technology has greatly expanded whole microbial cell processes for manufacturing amino acids, vitamins, or ribonucleotides. A novel well-designed scheme with integrated enzymatic conversions and fermentation enables the production of even complicated compounds, such as sugar nucleotides and oligosaccharides.
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Affiliation(s)
- S i Hashimoto
- Tokyo Research Laboratories, Kyowa Hakko Kogyo Co Ltd, Machida-shi, 194-8533, Japan.
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