1
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Pick LM, Oehme V, Hartmann J, Wenzlaff J, Tang Q, Grogan G, Ansorge-Schumacher MB. SilE-R and SilE-S-DABB Proteins Catalying Enantiospecific Hydrolysis of Organosilyl Ethers. Angew Chem Int Ed Engl 2024; 63:e202404105. [PMID: 38630059 DOI: 10.1002/anie.202404105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Indexed: 06/11/2024]
Abstract
Silyl ethers fulfil a fundamental role in synthetic organic chemistry as protecting groups and their selective cleavage is an important factor in their application. We present here for the first time two enzymes, SilE-R and SilE-S, which are able to hydrolyse silyl ethers. They belong to the stress-response dimeric A/B barrel domain (DABB) family and are able to cleave the Si-O bond with opposite enantiopreference. Silyl ethers containing aromatic, cyclic or aliphatic alcohols and, depending on the alcohol moiety, silyl functions as large as TBDMS are accepted. The X-ray crystal structure of SilE-R, determined to a resolution of 1.98 Å, in combination with mutational studies, revealed an active site featuring two histidine residues, H8 and H79, which likely act synergistically as nucleophile and Brønsted base in the hydrolytic mechanism, which has not previously been described for enzymes. Although the natural function of SilE-R and SilE-S is unknown, we propose that these 'silyl etherases' may have significant potential for synthetic applications.
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Affiliation(s)
- Lisa M Pick
- Professur für Molekulare Biotechnologie, Technische Universität Dresden, 01062, Dresden, Germany
| | - Viviane Oehme
- Professur für Molekulare Biotechnologie, Technische Universität Dresden, 01062, Dresden, Germany
| | - Julia Hartmann
- Professur für Molekulare Biotechnologie, Technische Universität Dresden, 01062, Dresden, Germany
| | - Jessica Wenzlaff
- Professur für Molekulare Biotechnologie, Technische Universität Dresden, 01062, Dresden, Germany
| | - Qingyun Tang
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, UK
| | - Gideon Grogan
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, UK
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2
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Chaikaew S, Watanabe Y, Zheng D, Motojima F, Yamaguchi T, Asano Y. Structure-Based Site-Directed Mutagenesis of Hydroxynitrile Lyase from Cyanogenic Millipede, Oxidus gracilis for Hydrocyanation and Henry Reactions. Chembiochem 2024:e202400118. [PMID: 38526556 DOI: 10.1002/cbic.202400118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2024] [Revised: 03/24/2024] [Accepted: 03/25/2024] [Indexed: 03/26/2024]
Abstract
Hydroxynitrile lyase (HNL) from the cyanogenic millipede Oxidus gracillis (OgraHNL) is a crucial enzyme in the cyanogenesis pathway. Here, the crystal structures of OgraHNL complexed with sulfate, benzaldehyde (BA), (R)-mandelonitrile ((R)-Man), (R)-2-chloromandelonitrile ((R)-2-Cl-Man), and acetone cyanohydrin (ACN) were solved at 1.6, 1.7, 2.3, 2.1, and 2.0 Å resolutions, respectively. The structure of OgraHNL revealed that it belonged to the lipocalin superfamily. Based on this structure, positive variants were designed to further improve the catalytic activity and enantioselectivity of the enzyme for asymmetric hydrocyanation and Henry reactions.
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Affiliation(s)
- Siriporn Chaikaew
- Biotechnology Research Center and Department of Biotechnology, Toyama Prefectural University, 5180 Kurokawa, Imizu, Toyama, 939-0398, Japan
- Asano Active Enzyme Molecule Project, ERATO, JST
| | - Yukio Watanabe
- Biotechnology Research Center and Department of Biotechnology, Toyama Prefectural University, 5180 Kurokawa, Imizu, Toyama, 939-0398, Japan
| | - Daijun Zheng
- Biotechnology Research Center and Department of Biotechnology, Toyama Prefectural University, 5180 Kurokawa, Imizu, Toyama, 939-0398, Japan
- Asano Active Enzyme Molecule Project, ERATO, JST
| | - Fumihiro Motojima
- Biotechnology Research Center and Department of Biotechnology, Toyama Prefectural University, 5180 Kurokawa, Imizu, Toyama, 939-0398, Japan
- Asano Active Enzyme Molecule Project, ERATO, JST
| | - Takuya Yamaguchi
- Biotechnology Research Center and Department of Biotechnology, Toyama Prefectural University, 5180 Kurokawa, Imizu, Toyama, 939-0398, Japan
- Asano Active Enzyme Molecule Project, ERATO, JST
| | - Yasuhisa Asano
- Biotechnology Research Center and Department of Biotechnology, Toyama Prefectural University, 5180 Kurokawa, Imizu, Toyama, 939-0398, Japan
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3
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Zheng D, Nakabayashi M, Asano Y. Structural characterization of Linum usitatissimum hydroxynitrile lyase: A new cyanohydrin decomposition mechanism involving a cyano-zinc complex. J Biol Chem 2022; 298:101650. [PMID: 35101448 PMCID: PMC8892092 DOI: 10.1016/j.jbc.2022.101650] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2021] [Revised: 01/18/2022] [Accepted: 01/19/2022] [Indexed: 12/02/2022] Open
Abstract
Hydroxynitrile lyase from Linum usitatissimum (LuHNL) is an enzyme involved in the catabolism of cyanogenic glycosides to release hydrogen cyanide upon tissue damage. This enzyme strictly conserves the substrate- and NAD(H)-binding domains of Zn2+-containing alcohol dehydrogenase (ADH); however, there is no evidence suggesting that LuHNL possesses ADH activity. Herein, we determined the ligand-free 3D structure of LuHNL and its complex with acetone cyanohydrin and (R)-2-butanone cyanohydrin using X-ray crystallography. These structures reveal that an A-form NAD+ is tightly but not covalently bound to each subunit of LuHNL. The restricted movement of the NAD+ molecule is due to the “sandwich structure” on the adenine moiety of NAD+. Moreover, the structures and mutagenesis analysis reveal a novel reaction mechanism for cyanohydrin decomposition involving the cyano-zinc complex and hydrogen-bonded interaction of the hydroxyl group of cyanohydrin with Glu323/Thr65 and H2O/Lys162 of LuHNL. The deprotonated Lys162 and protonated Glu323 residues are presumably stabilized by a partially desolvated microenvironment. In summary, the substrate binding geometry of LuHNL provides insights into the differences in activities of LuHNL and ADH, and identifying this novel reaction mechanism is an important contribution to the study of hydroxynitrile lyases.
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Affiliation(s)
- Daijun Zheng
- Biotechnology Research Center and Department of Biotechnology, Toyama Prefectural University, Imizu, Toyama, Japan
| | - Makoto Nakabayashi
- Faculty of Pharmacy, Osaka Ohtani University, Tondabayashi, Osaka, Japan
| | - Yasuhisa Asano
- Biotechnology Research Center and Department of Biotechnology, Toyama Prefectural University, Imizu, Toyama, Japan.
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4
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Liu M, Wei D, Wen Z, Wang JB. Progress in Stereoselective Construction of C-C Bonds Enabled by Aldolases and Hydroxynitrile Lyases. Front Bioeng Biotechnol 2021; 9:653682. [PMID: 33968915 PMCID: PMC8097096 DOI: 10.3389/fbioe.2021.653682] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Accepted: 03/25/2021] [Indexed: 11/13/2022] Open
Abstract
The creation of C-C bonds is an effective strategy for constructing complex compounds from simple synthetic blocks. Although many methods have been developed for C-C bond construction, the stereoselective creation of new C-C bonds remains a challenge. The selectivities (enantioselectivity, regioselectivity, and chemoselectivity) of biocatalysts are higher than those of chemical catalysts, therefore biocatalysts are excellent candidates for use in stereoselective C-C bond formation. Here, we summarize progress made in the past 10 years in stereoselective C-C bond formation enabled by two classic types of enzyme, aldolases and hydroxynitrile lyases. The information in this review will enable the development of new routes to the stereoselective construction of C-C bonds.
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Affiliation(s)
- Mi Liu
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, China.,Key Laboratory of Phytochemistry R&D of Hunan Province, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, China
| | - Dan Wei
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, China.,Key Laboratory of Phytochemistry R&D of Hunan Province, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, China
| | - Zexing Wen
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, China.,Key Laboratory of Phytochemistry R&D of Hunan Province, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, China
| | - Jian-Bo Wang
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, China.,Key Laboratory of Phytochemistry R&D of Hunan Province, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, China
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5
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Nuylert A, Nakabayashi M, Yamaguchi T, Asano Y. Discovery and Structural Analysis to Improve the Enantioselectivity of Hydroxynitrile Lyase from Parafontaria laminata Millipedes for ( R)-2-Chloromandelonitrile Synthesis. ACS OMEGA 2020; 5:27896-27908. [PMID: 33163773 PMCID: PMC7643134 DOI: 10.1021/acsomega.0c03070] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Accepted: 10/02/2020] [Indexed: 06/11/2023]
Abstract
Hydroxynitrile lyase (HNL) catalyzes the reversible synthesis and degradation of cyanohydrins, which are important synthetic intermediates for fine chemical and pharmaceutical industries. Here, we report the discovery of HNL from Parafontaria laminata (PlamHNL) millipedes, purification of the HNL to homogeneity, expression of the gene for the enzyme in heterologous expression hosts, and increase in the reaction rate and enantioselectivity in the synthesis of 2-chloromandelonitrile by protein engineering. The recombinant PlamHNL expressed in Pichia pastoris is glycosylated and has a higher thermostability and pH stability than the nonglycosylated HNL expressed in Escherichia coli. PlamHNL showed a unique wide substrate specificity among other millipede HNLs acting on various cyanohydrins, including 2-chloromandelonitrile, a key intermediate for the antithrombotic agent clopidogrel. We solved the X-ray crystal structure of the PlamHNL and found that the catalytic residues were almost identical to those of HNL from Chamberlinius hualienensis, although the forming binding cavity was different. In order to improve the catalytic activity and stereoselectivity, a computational structure-guided directed evolution approach was performed by an enzyme-substrate docking simulation at all of the residues that were exposed on the surface of the active site. The PlamHNL-N85Y mutant showed higher conversion (91% conversion with 98.2% ee of the product) than the wild type (76% conversion with 90% ee of the product) at pH 3.5 and 25 °C for 30 min of incubation. This study shows the diversity of millipede HNLs and reveals the molecular basis for improvement of the activity and stereoselectivity of the wild-type HNL to increase the reaction rate and enantioselectivity in the synthesis of 2-chloromandelonitrile.
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Affiliation(s)
- Aem Nuylert
- Biotechnology
Research Center and Department of Biotechnology, Toyama Prefectural University, 5180 Kurokawa, Imizu, Toyama 939-0398, Japan
- Asano
Active Enzyme Molecule Project, ERATO, JST, 5180 Kurokawa, Imizu, Toyama 939-0398, Japan
| | - Makoto Nakabayashi
- Biotechnology
Research Center and Department of Biotechnology, Toyama Prefectural University, 5180 Kurokawa, Imizu, Toyama 939-0398, Japan
| | - Takuya Yamaguchi
- Asano
Active Enzyme Molecule Project, ERATO, JST, 5180 Kurokawa, Imizu, Toyama 939-0398, Japan
| | - Yasuhisa Asano
- Biotechnology
Research Center and Department of Biotechnology, Toyama Prefectural University, 5180 Kurokawa, Imizu, Toyama 939-0398, Japan
- Asano
Active Enzyme Molecule Project, ERATO, JST, 5180 Kurokawa, Imizu, Toyama 939-0398, Japan
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6
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Müller E, Sosedov O, Gröning JAD, Stolz A. Synthesis of (R)-mandelic acid and (R)-mandelic acid amide by recombinant E. coli strains expressing a (R)-specific oxynitrilase and an arylacetonitrilase. Biotechnol Lett 2020; 43:287-296. [PMID: 32936375 PMCID: PMC7796878 DOI: 10.1007/s10529-020-02998-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Accepted: 09/03/2020] [Indexed: 11/26/2022]
Abstract
OBJECTIVES Chiral 2-hydroxycarboxylic acids and 2-hydroxycarboxamides are valuable synthons for the chemical industry. RESULTS The biocatalytic syntheses of (R)-mandelic acid and (R)-mandelic acid amide by recombinant Escherichia coli clones were studied. Strains were constructed which simultaneously expressed a (R)-specific oxynitrilase (hydroxynitrile lyase) from the plant Arabidopsis thaliana together with the arylacetonitrilase from the bacterium Pseudomonas fluorescens EBC191. In addition, recombinant strains were constructed which expressed a previously described acid tolerant variant of the oxynitrilase and an amide forming variant of the nitrilase. The whole cell catalysts which simultaneously expressed the (R)-specific oxynitrilase and the wild-type nitrilase transformed in slightly acidic buffer systems benzaldehyde plus cyanide preferentially to (R)-mandelic acid with ee-values > 95%. The combination of the (R)-specific oxynitrilase with the amide forming nitrilase variant gave whole cell catalysts which converted at pH-values ≤ pH 5 benzaldehyde plus cyanide with a high degree of enantioselectivity (ee > 90%) to (R)-mandelic acid amide. The acid and the amide forming catalysts also converted chlorinated benzaldehydes with cyanide to chlorinated mandelic acid or chlorinated mandelic acid amides. CONCLUSIONS Efficient systems for the biocatalytic production of (R)-2-hydroxycarboxylic acids and (R)-2-hydroxycarboxamides were generated.
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Affiliation(s)
- Erik Müller
- Institut für Mikrobiologie, Universität Stuttgart, Allmandring 31, 70569 Stuttgart, Germany
| | - Olga Sosedov
- Institut für Mikrobiologie, Universität Stuttgart, Allmandring 31, 70569 Stuttgart, Germany
- Present Address: Biochem Labor für chemische Analytik GmbH, Daimlerstr. 5B, 76185 Karlsruhe, Germany
| | | | - Andreas Stolz
- Institut für Mikrobiologie, Universität Stuttgart, Allmandring 31, 70569 Stuttgart, Germany
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7
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Motojima F, Izumi A, Nuylert A, Zhai Z, Dadashipour M, Shichida S, Yamaguchi T, Nakano S, Asano Y. R-hydroxynitrile lyase from the cyanogenic millipede, Chamberlinius hualienensis-A new entry to the carrier protein family Lipocalines. FEBS J 2020; 288:1679-1695. [PMID: 32679618 PMCID: PMC7983990 DOI: 10.1111/febs.15490] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 06/30/2020] [Accepted: 07/08/2020] [Indexed: 01/05/2023]
Abstract
Hydroxynitrile lyases (HNLs) catalyze the cleavage of cyanohydrin into cyanide and the corresponding aldehyde or ketone. Moreover, they catalyze the synthesis of cyanohydrin in the reverse reaction, utilized in industry for preparation of enantiomeric pure pharmaceutical ingredients and fine chemicals. We discovered a new HNL from the cyanogenic millipede, Chamberlinius hualienensis. The enzyme displays several features including a new primary structure, high stability, and the highest specific activity in (R)‐mandelonitrile ((R)‐MAN) synthesis (7420 U·mg−1) among the reported HNLs. In this study, we elucidated the crystal structure and reaction mechanism of natural ChuaHNL in ligand‐free form and its complexes with acetate, cyanide ion, and inhibitors (thiocyanate or iodoacetate) at 1.6, 1.5, 2.1, 1.55, and 1.55 Å resolutions, respectively. The structure of ChuaHNL revealed that it belongs to the lipocalin superfamily, despite low amino acid sequence identity. The docking model of (R)‐MAN with ChuaHNL suggested that the hydroxyl group forms hydrogen bonds with R38 and K117, and the nitrile group forms hydrogen bonds with R38 and Y103. The mutational analysis showed the importance of these residues in the enzymatic reaction. From these results, we propose that K117 acts as a base to abstract a proton from the hydroxyl group of cyanohydrins and R38 acts as an acid to donate a proton to the cyanide ion during the cleavage reaction of cyanohydrins. The reverse mechanism would occur during the cyanohydrin synthesis. (Photo: Dr. Yuko Ishida) Databases Structural data are available in PDB database under the accession numbers 6JHC, 6KFA, 6KFB, 6KFC, and 6KFD.
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Affiliation(s)
- Fumihiro Motojima
- Biotechnology Research Center and Department of Biotechnology, Toyama Prefectural University, Imizu, Toyama, Japan.,Asano Active Enzyme Molecule Project, ERATO, JST, Imizu, Toyama, 939-0398, Japan
| | - Atsushi Izumi
- Biotechnology Research Center and Department of Biotechnology, Toyama Prefectural University, Imizu, Toyama, Japan.,Asano Active Enzyme Molecule Project, ERATO, JST, Imizu, Toyama, 939-0398, Japan
| | - Aem Nuylert
- Biotechnology Research Center and Department of Biotechnology, Toyama Prefectural University, Imizu, Toyama, Japan
| | - Zhenyu Zhai
- Biotechnology Research Center and Department of Biotechnology, Toyama Prefectural University, Imizu, Toyama, Japan.,Asano Active Enzyme Molecule Project, ERATO, JST, Imizu, Toyama, 939-0398, Japan
| | - Mohammad Dadashipour
- Biotechnology Research Center and Department of Biotechnology, Toyama Prefectural University, Imizu, Toyama, Japan.,Asano Active Enzyme Molecule Project, ERATO, JST, Imizu, Toyama, 939-0398, Japan
| | - Sayaka Shichida
- Biotechnology Research Center and Department of Biotechnology, Toyama Prefectural University, Imizu, Toyama, Japan.,Asano Active Enzyme Molecule Project, ERATO, JST, Imizu, Toyama, 939-0398, Japan
| | - Takuya Yamaguchi
- Biotechnology Research Center and Department of Biotechnology, Toyama Prefectural University, Imizu, Toyama, Japan.,Asano Active Enzyme Molecule Project, ERATO, JST, Imizu, Toyama, 939-0398, Japan
| | - Shogo Nakano
- Biotechnology Research Center and Department of Biotechnology, Toyama Prefectural University, Imizu, Toyama, Japan.,Asano Active Enzyme Molecule Project, ERATO, JST, Imizu, Toyama, 939-0398, Japan
| | - Yasuhisa Asano
- Biotechnology Research Center and Department of Biotechnology, Toyama Prefectural University, Imizu, Toyama, Japan.,Asano Active Enzyme Molecule Project, ERATO, JST, Imizu, Toyama, 939-0398, Japan
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8
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Nuylert A, Motojima F, Khanongnuch C, Hongpattarakere T, Asano Y. Stabilization of Hydroxynitrile Lyases from Two Variants of Passion Fruit, Passiflora edulis Sims and Passiflora edulis Forma flavicarpa, by C-Terminal Truncation. Chembiochem 2020; 21:181-189. [PMID: 31562666 DOI: 10.1002/cbic.201900468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Indexed: 11/07/2022]
Abstract
Because the synthesis of chiral compounds generally requires a broad range of substrate specificity and stable enzymes, screening for better enzymes and/or improvement of enzyme properties through molecular approaches is necessary for sustainable industrial development. Herein, the discovery of unique hydroxynitrile lyases (HNLs) from two species of passion fruits, Passiflora edulis forma flavicarpa (yellow passion fruit, PeHNL-Ny) and Passiflora edulis Sims (purple passion fruit, PeHNL-Np), isolated and purified from passion fruit leaves is reported. These are the smallest HNLs (comprising 121 amino acids). Amino acid sequences of both enzymes are 99 % identical; there is a difference of one amino acid in a consensus sequence. PeHNL-Np has an Ala residue at position 107 and is nonglycosylated at Asn105. Because it was confirmed that natural and glycosylated PeHNL-Ny showed superior thermostability, pH stability, and organic tolerance to that of PeHNL-Np, it has been speculated that protein engineering around the only glycosylation site, Asn105, located at the C-terminal region of PeHNL-Ny, might contribute to the stabilization of PeHNL. Therefore, the focus is on improved stability of the nonglycosylated PeHNL by truncating its C-terminal region. The C-terminal-truncated PeHNLΔ107 was obtained by truncating 15 amino acids from the C terminus followed by expression in Escherichia coli. PeHNLΔ107 expressed in E. coli was not glycosylated, and showed improved thermostability, solvent stability, and reusability similar to that of the wild-type glycosylated form of PeHNL expressed in Pichia pastoris. These data reveal that the lack of the high-flexibility region at the C terminus of PeHNL might be a possible reason for improving the stability of PeHNL.
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Affiliation(s)
- Aem Nuylert
- Biotechnology Research Center, Department of Biotechnology, Toyama Prefectural University, 5180 Kurokawa, Imizu, Toyama, 939-0398, Japan.,Asano Active Enzyme Molecule Project, ERATO, JST, 5180 Kurokawa, Imizu, Toyama, 939-0398, Japan
| | - Fumihiro Motojima
- Biotechnology Research Center, Department of Biotechnology, Toyama Prefectural University, 5180 Kurokawa, Imizu, Toyama, 939-0398, Japan.,Asano Active Enzyme Molecule Project, ERATO, JST, 5180 Kurokawa, Imizu, Toyama, 939-0398, Japan
| | - Chartchai Khanongnuch
- Division of Biotechnology, School of Agro-Industry, Faculty of Agro-Industry, Chiang Mai University, Chiang Mai, 50100, Thailand
| | - Tipparat Hongpattarakere
- Department of Industrial Biotechnology, Faculty of Agro-Industry, Prince of Songkla University, Hat Yai, Songkhla, 90112, Thailand
| | - Yasuhisa Asano
- Biotechnology Research Center, Department of Biotechnology, Toyama Prefectural University, 5180 Kurokawa, Imizu, Toyama, 939-0398, Japan.,Asano Active Enzyme Molecule Project, ERATO, JST, 5180 Kurokawa, Imizu, Toyama, 939-0398, Japan
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9
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Teixeira N, Melo JC, Batista LF, Paula-Souza J, Fronza P, Brandão MG. Edible fruits from Brazilian biodiversity: A review on their sensorial characteristics versus bioactivity as tool to select research. Food Res Int 2019; 119:325-348. [DOI: 10.1016/j.foodres.2019.01.058] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2018] [Revised: 01/21/2019] [Accepted: 01/23/2019] [Indexed: 12/24/2022]
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10
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Jangir N, Padhi SK. Immobilized Baliospermum montanum hydroxynitrile lyase catalyzed synthesis of chiral cyanohydrins. Bioorg Chem 2018; 84:32-40. [PMID: 30481644 DOI: 10.1016/j.bioorg.2018.11.017] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Revised: 11/14/2018] [Accepted: 11/15/2018] [Indexed: 10/27/2022]
Abstract
Hydroxynitrile lyase (HNL) catalyzed enantioselective CC bond formation is an efficient approach to synthesize chiral cyanohydrins which are important building blocks in the synthesis of a number of fine chemicals, agrochemicals and pharmaceuticals. Immobilization of HNL is known to provide robustness, reusability and in some cases also enhances activity and selectivity. We optimized the preparation of immobilization of Baliospermium montanum HNL (BmHNL) by cross linking enzyme aggregate (CLEA) method and characterized it by SEM. Optimization of biocatalytic parameters was performed to obtain highest % conversion and ee of (S)-mandelonitrile from benzaldehyde using CLEA-BmHNL. The optimized reaction parameters were: 20 min of reaction time, 7 U of CLEA-BmHNL, 1.2 mM substrate, and 300 mM citrate buffer pH 4.2, that synthesized (S)-mandelonitrile in ∼99% ee and ∼60% conversion. Addition of organic solvent in CLEA-BmHNL biocatalysis did not improve in % ee or conversion of product unlike other CLEA-HNLs. CLEA-BmHNL could be successfully reused for eight consecutive cycles without loss of conversion or product formation and five cycles with a little loss in enantioselectivity. Eleven different chiral cyanohydrins were synthesized under optimal biocatalytic conditions in up to 99% ee and 59% conversion, however the % conversion and ee varied for different products. CLEA-BmHNL has improved the enantioselectivity of (S)-mandelonitrile synthesis compared to the use of purified BmHNL. Nine aldehydes not tested earlier with BmHNL were converted into their corresponding (S)-cyanohydrins for the first time using CLEA-BmHNL. Among the eleven (S)-cyanohydrins syntheses reported here, eight of them have not been synthesized by any CLEA-HNL. Overall, this study showed preparation, characterization of a stable, robust and recyclable biocatalyst i.e. CLEA-BmHNL and its biocatalytic application in the synthesis of different (S)-aromatic cyanohydrins.
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Affiliation(s)
- Nisha Jangir
- Biocatalysis and Enzyme Engineering Laboratory, Department of Biochemistry, School of Life Sciences, University of Hyderabad, Hyderabad 500 046, India
| | - Santosh Kumar Padhi
- Biocatalysis and Enzyme Engineering Laboratory, Department of Biochemistry, School of Life Sciences, University of Hyderabad, Hyderabad 500 046, India.
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11
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Isobe K, Kitagawa A, Kanamori K, Kashiwagi N, Matsui D, Yamaguchi T, Fuhshuku KI, Semba H, Asano Y. Characterization of a novel hydroxynitrile lyase from Nandina domestica Thunb. Biosci Biotechnol Biochem 2018; 82:1760-1769. [DOI: 10.1080/09168451.2018.1490171] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
ABSTRACT
The leaves of Nandina domestica Thunb. exhibited high hydroxynitrile lyase (HNL) activity in (R)-mandelonitrile synthesis. The specific activity of young leaves was significantly higher than that of mature leaves. We isolated two HNLs with molecular mass of 24.9 kDa (NdHNL-S) and 28.0 kDa (NdHNL-L) from the young leaves. Both NdHNLs were composed of two identical subunits, without FAD and carbohydrates. We purified NdHNL-L and revealed its enzymatic properties. The whole deduced amino acid sequence of NdHNL-L was not homologous to any other HNLs, and the specific activity for mandelonitrile synthesis by NdHNL-L was higher than that by other plant HNLs. The enzyme catalyzed enantioselective synthesis of (R)-cyanohydrins, exhibited high activity at pH 4.0, and high stability in the pH range of 3.5–8.0 and below 55°C. Thus, NdHNL-L is a novel HNL with novel amino acid sequence and has a potential for the efficient production of (R)-cyanohydrins.
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Affiliation(s)
- Kimiyasu Isobe
- Biotechnology Research Center andDepartment of Biotechnology, Toyama Prefectural University, Kurokawa, Imizu, Toyama, Japan
- Asano Active Enzyme Molecule Project, ERATO, JST, Kurokawa, Imizu, Toyama, Japan
| | - Asuka Kitagawa
- Biotechnology Research Center andDepartment of Biotechnology, Toyama Prefectural University, Kurokawa, Imizu, Toyama, Japan
| | - Kazuma Kanamori
- Biotechnology Research Center andDepartment of Biotechnology, Toyama Prefectural University, Kurokawa, Imizu, Toyama, Japan
| | - Nozomi Kashiwagi
- Biotechnology Research Center andDepartment of Biotechnology, Toyama Prefectural University, Kurokawa, Imizu, Toyama, Japan
| | - Daisuke Matsui
- Biotechnology Research Center andDepartment of Biotechnology, Toyama Prefectural University, Kurokawa, Imizu, Toyama, Japan
- Asano Active Enzyme Molecule Project, ERATO, JST, Kurokawa, Imizu, Toyama, Japan
| | - Takuya Yamaguchi
- Asano Active Enzyme Molecule Project, ERATO, JST, Kurokawa, Imizu, Toyama, Japan
| | - Ken-ichi Fuhshuku
- Biotechnology Research Center andDepartment of Biotechnology, Toyama Prefectural University, Kurokawa, Imizu, Toyama, Japan
| | - Hisashi Semba
- Suita Research Laboratory, Nippon Shokubai Co. Ltd, Suita, Osaka, Japan
| | - Yasuhisa Asano
- Biotechnology Research Center andDepartment of Biotechnology, Toyama Prefectural University, Kurokawa, Imizu, Toyama, Japan
- Asano Active Enzyme Molecule Project, ERATO, JST, Kurokawa, Imizu, Toyama, Japan
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