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Wang F, Qi H, Li H, Ma X, Gao X, Li C, Lu F, Mao S, Qin HM. State-of-the-art strategies and research advances for the biosynthesis of D-amino acids. Crit Rev Biotechnol 2024; 44:495-513. [PMID: 37160372 DOI: 10.1080/07388551.2023.2193861] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Accepted: 02/09/2023] [Indexed: 05/11/2023]
Abstract
D-amino acids (D-AAs) are the enantiomeric counterparts of L-amino acids (L-AAs) and important functional factors with a wide variety of physiological activities and applications in the food manufacture industry. Some D-AAs, such as D-Ala, D-Leu, and D-Phe, have been favored by consumers as sweeteners and fragrances because of their unique flavor. The biosynthesis of D-AAs has attracted much attention in recent years due to their unique advantages. In this review, we comprehensively analyze the structure-function relationships, biosynthesis pathways, multi-enzyme cascade and whole-cell catalysis for the production of D-AAs. The state-of-the-art strategies, including immobilization, protein engineering, and high-throughput screening, are summarized. Future challenges and perspectives of strategies-driven by bioinformatics technologies and smart computing technologies, as well as enzyme immobilization, are also discussed. These new approaches will promote the commercial production and application of D-AAs in the food industry by optimizing the key enzymes for industrial biocatalysts.
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Affiliation(s)
- Fenghua Wang
- College of Biotechnology, Tianjin University of Science and Technology, Tianjin, P.R. China
| | - Hongbin Qi
- College of Biotechnology, Tianjin University of Science and Technology, Tianjin, P.R. China
| | - Huimin Li
- College of Biotechnology, Tianjin University of Science and Technology, Tianjin, P.R. China
| | - Xuanzhen Ma
- College of Biotechnology, Tianjin University of Science and Technology, Tianjin, P.R. China
| | - Xin Gao
- College of Biotechnology, Tianjin University of Science and Technology, Tianjin, P.R. China
| | - Chao Li
- College of Biotechnology, Tianjin University of Science and Technology, Tianjin, P.R. China
| | - Fuping Lu
- College of Biotechnology, Tianjin University of Science and Technology, Tianjin, P.R. China
| | - Shuhong Mao
- College of Biotechnology, Tianjin University of Science and Technology, Tianjin, P.R. China
| | - Hui-Min Qin
- College of Biotechnology, Tianjin University of Science and Technology, Tianjin, P.R. China
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Araseki H, Sugishima N, Chisuga T, Nakano S. Development of an Enzyme Cascade System for the Synthesis of Enantiomerically Pure D-Amino Acids Utilizing Ancestral L-Amino Acid Oxidase. Chembiochem 2024; 25:e202400036. [PMID: 38385659 DOI: 10.1002/cbic.202400036] [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: 01/16/2024] [Revised: 02/19/2024] [Accepted: 02/22/2024] [Indexed: 02/23/2024]
Abstract
Enantiomerically pure D-amino acids hold significant potential as precursors for synthesizing various fine chemicals, including peptide-based drugs and other pharmaceuticals. This study focuses on establishing an enzymatic cascade system capable of converting various L-amino acids into their D-isomers. The system integrates four enzymes: ancestral L-amino acid oxidase (AncLAAO-N4), D-amino acid dehydrogenase (DAADH), D-glucose dehydrogenase (GDH), and catalase. AncLAAO-N4 initiates the process by converting L-amino acids to corresponding keto acids, which are then stereo-selectively aminated to D-amino acids by DAADH using NADPH and NH4Cl. Concurrently, any generated H2O2 is decomposed into O2 and H2O by catalase, while GDH regenerates NADPH from D-glucose. Optimization of reaction conditions and substrate concentrations enabled the successful synthesis of five D-amino acids, including a D-Phe derivative, three D-Trp derivatives, and D-phenylglycine, all with high enantiopurity (>99 % ee) at a preparative scale (>100 mg). This system demonstrates a versatile approach for producing a diverse array of D-amino acids.
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Affiliation(s)
- Hayato Araseki
- Graduate Division of Nutritional and Environmental Sciences, University of Shizuoka 52-1 Yada, Suruga-ku, Shizuoka, 422-8526, Japan for S.N
| | - Narumi Sugishima
- Graduate Division of Nutritional and Environmental Sciences, University of Shizuoka 52-1 Yada, Suruga-ku, Shizuoka, 422-8526, Japan for S.N
| | - Taichi Chisuga
- Graduate Division of Nutritional and Environmental Sciences, University of Shizuoka 52-1 Yada, Suruga-ku, Shizuoka, 422-8526, Japan for S.N
| | - Shogo Nakano
- Graduate Division of Nutritional and Environmental Sciences, University of Shizuoka 52-1 Yada, Suruga-ku, Shizuoka, 422-8526, Japan for S.N
- PRESTO, Japan Science and Technology Agency, Saitama, Japan
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Kawamura Y, Ishida C, Miyata R, Miyata A, Hayashi S, Fujinami D, Ito S, Nakano S. Structural and functional analysis of hyper-thermostable ancestral L-amino acid oxidase that can convert Trp derivatives to D-forms by chemoenzymatic reaction. Commun Chem 2023; 6:200. [PMID: 37737277 PMCID: PMC10517122 DOI: 10.1038/s42004-023-01005-1] [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: 05/22/2023] [Accepted: 09/12/2023] [Indexed: 09/23/2023] Open
Abstract
Production of D-amino acids (D-AAs) on a large-scale enables to provide precursors of peptide therapeutics. In this study, we designed a novel L-amino acid oxidase, HTAncLAAO2, by ancestral sequence reconstruction, exhibiting high thermostability and long-term stability. The crystal structure of HTAncLAAO2 was determined at 2.2 Å by X-ray crystallography, revealing that the enzyme has an octameric form like a "ninja-star" feature. Enzymatic property analysis demonstrated that HTAncLAAO2 exhibits three-order larger kcat/Km values towards four L-AAs (L-Phe, L-Leu, L-Met, and L-Ile) than that of L-Trp. Through screening the variants, we obtained the HTAncLAAO2(W220A) variant, which shows a > 6-fold increase in kcat value toward L-Trp compared to the original enzyme. This variant applies to synthesizing enantio-pure D-Trp derivatives from L- or rac-forms at a preparative scale. Given its excellent properties, HTAncLAAO2 would be a starting point for designing novel oxidases with high activity toward various amines and AAs.
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Affiliation(s)
- Yui Kawamura
- Graduate Division of Nutritional and Environmental Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka, 422-8526, Japan
| | - Chiharu Ishida
- Graduate Division of Nutritional and Environmental Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka, 422-8526, Japan
| | - Ryo Miyata
- Graduate Division of Nutritional and Environmental Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka, 422-8526, Japan
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology, 2217-14 Hayashi-cho, Takamatsu, Kagawa, 761-0395, Japan
| | - Azusa Miyata
- Graduate Division of Nutritional and Environmental Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka, 422-8526, Japan
| | - Seiichiro Hayashi
- Division of Structural Biology, Medical Institute of Bioregulation, Kyushu University, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Daisuke Fujinami
- Graduate Division of Nutritional and Environmental Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka, 422-8526, Japan
| | - Sohei Ito
- Graduate Division of Nutritional and Environmental Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka, 422-8526, Japan
| | - Shogo Nakano
- Graduate Division of Nutritional and Environmental Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka, 422-8526, Japan.
- PREST, Japan Science and Technology Agency, Saitama, Japan.
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Ishida C, Miyata R, Hasebe F, Miyata A, Kumazawa S, Ito S, Nakano S. Reconstruction of Hyper‐Thermostable Ancestral L‐Amino Acid Oxidase to Perform Deracemization to D‐Amino Acids. ChemCatChem 2021. [DOI: 10.1002/cctc.202101296] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Chiharu Ishida
- Graduate School of Integrated Pharmaceutical and Nutritional Sciences University of Shizuoka Shizuoka 422-8526 Japan
| | - Ryo Miyata
- Graduate School of Integrated Pharmaceutical and Nutritional Sciences University of Shizuoka Shizuoka 422-8526 Japan
| | - Fumihito Hasebe
- Graduate School of Integrated Pharmaceutical and Nutritional Sciences University of Shizuoka Shizuoka 422-8526 Japan
| | - Azusa Miyata
- Graduate School of Integrated Pharmaceutical and Nutritional Sciences University of Shizuoka Shizuoka 422-8526 Japan
| | - Shigenori Kumazawa
- Graduate School of Integrated Pharmaceutical and Nutritional Sciences University of Shizuoka Shizuoka 422-8526 Japan
| | - Sohei Ito
- Graduate School of Integrated Pharmaceutical and Nutritional Sciences University of Shizuoka Shizuoka 422-8526 Japan
| | - Shogo Nakano
- Graduate School of Integrated Pharmaceutical and Nutritional Sciences University of Shizuoka Shizuoka 422-8526 Japan
- PREST, Japan Science and Technology Agency Saitama 332-0012 Japan
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Abdulbagi M, Wang L, Siddig O, Di B, Li B. D-Amino Acids and D-Amino Acid-Containing Peptides: Potential Disease Biomarkers and Therapeutic Targets? Biomolecules 2021; 11:1716. [PMID: 34827714 PMCID: PMC8615943 DOI: 10.3390/biom11111716] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Revised: 10/26/2021] [Accepted: 10/27/2021] [Indexed: 12/17/2022] Open
Abstract
In nature, amino acids are found in two forms, L and D enantiomers, except for glycine which does not have a chiral center. The change of one form to the other will lead to a change in the primary structure of proteins and hence may affect the function and biological activity of proteins. Indeed, several D-amino acid-containing peptides (DAACPs) were isolated from patients with cataracts, Alzheimer's and other diseases. Additionally, significant levels of free D-amino acids were found in several diseases, reflecting the disease conditions. Studying the molecular mechanisms of the DAACPs formation and the alteration in D-amino acids metabolism will certainly assist in understanding these diseases and finding new biomarkers and drug targets. In this review, the presence of DAACPs and free D-amino acids and their links with disease development and progress are summarized. Similarly, we highlight some recent advances in analytical techniques that led to improvement in the discovery and analysis of DAACPs and D-amino acids.
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Affiliation(s)
- Mohamed Abdulbagi
- Department of Pharmaceutical Analysis, China Pharmaceutical University, Nanjing 210009, China; (M.A.); (L.W.); (O.S.)
| | - Liya Wang
- Department of Pharmaceutical Analysis, China Pharmaceutical University, Nanjing 210009, China; (M.A.); (L.W.); (O.S.)
| | - Orwa Siddig
- Department of Pharmaceutical Analysis, China Pharmaceutical University, Nanjing 210009, China; (M.A.); (L.W.); (O.S.)
| | - Bin Di
- Department of Pharmaceutical Analysis, China Pharmaceutical University, Nanjing 210009, China; (M.A.); (L.W.); (O.S.)
- Center Key Laboratory on Protein Chemistry and Structural Biology, China Pharmaceutical University, Nanjing 210009, China
- MOE Key Laboratory of Drug Quality Control and Pharmacovigilance, China Pharmaceutical University, Nanjing 210009, China
| | - Bo Li
- Department of Pharmaceutical Analysis, China Pharmaceutical University, Nanjing 210009, China; (M.A.); (L.W.); (O.S.)
- Center Key Laboratory on Protein Chemistry and Structural Biology, China Pharmaceutical University, Nanjing 210009, China
- MOE Key Laboratory of Drug Quality Control and Pharmacovigilance, China Pharmaceutical University, Nanjing 210009, China
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Zhou Y, Wu S, Bornscheuer UT. Recent advances in (chemo)enzymatic cascades for upgrading bio-based resources. Chem Commun (Camb) 2021; 57:10661-10674. [PMID: 34585190 DOI: 10.1039/d1cc04243b] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Developing (chemo)enzymatic cascades is very attractive for green synthesis, because they streamline multistep synthetic processes. In this Feature Article, we have summarized the recent advances in in vitro or whole-cell cascade reactions with a focus on the use of renewable bio-based resources as starting materials. This includes the synthesis of rare sugars (such as ketoses, L-ribulose, D-tagatose, myo-inositol or aminosugars) from readily available carbohydrate sources (cellulose, hemi-cellulose, starch), in vitro enzyme pathways to convert glucose to various biochemicals, cascades to convert 5-hydroxymethylfurfural and furfural obtained from lignin or xylose into novel precursors for polymer synthesis, the syntheses of phenolic compounds, cascade syntheses of aliphatic and highly reduced chemicals from plant oils and fatty acids, upgrading of glycerol or ethanol as well as cascades to transform natural L-amino acids into high-value (chiral) compounds. In several examples these processes have demonstrated their efficiency with respect to high space-time yields and low E-factors enabling mature green chemistry processes. Also, the strengths and limitations are discussed and an outlook is provided for improving the existing and developing new cascades.
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Affiliation(s)
- Yi Zhou
- State Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University, No. 1 Shizishan Street, Wuhan 430070, P. R. China.
| | - Shuke Wu
- State Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University, No. 1 Shizishan Street, Wuhan 430070, P. R. China. .,Department of Biotechnology & Enzyme Catalysis, Institute of Biochemistry, University Greifswald, Felix-Hausdorff-Str. 4, D-17487 Greifswald, Germany.
| | - Uwe T Bornscheuer
- Department of Biotechnology & Enzyme Catalysis, Institute of Biochemistry, University Greifswald, Felix-Hausdorff-Str. 4, D-17487 Greifswald, Germany.
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Sugiura S, Nakano S, Niwa M, Hasebe F, Matsui D, Ito S. Catalytic mechanism of ancestral L-lysine oxidase assigned by sequence data mining. J Biol Chem 2021; 297:101043. [PMID: 34358565 PMCID: PMC8405998 DOI: 10.1016/j.jbc.2021.101043] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2021] [Revised: 07/26/2021] [Accepted: 08/02/2021] [Indexed: 11/23/2022] Open
Abstract
A large number of protein sequences are registered in public databases such as PubMed. Functionally uncharacterized enzymes are included in these databases, some of which likely have potential for industrial applications. However, assignment of the enzymes remained difficult tasks for now. In this study, we assigned a total of 28 original sequences to uncharacterized enzymes in the FAD-dependent oxidase family expressed in some species of bacteria including Chryseobacterium, Flavobacterium, and Pedobactor. Progenitor sequence of the assigned 28 sequences was generated by ancestral sequence reconstruction, and the generated sequence exhibited L-lysine oxidase activity; thus, we named the enzyme AncLLysO. Crystal structures of ligand-free and ligand-bound forms of AncLLysO were determined, indicating that the enzyme recognizes L-Lys by hydrogen bond formation with R76 and E383. The binding of L-Lys to AncLLysO induced dynamic structural change at a plug loop formed by residues 251 to 254. Biochemical assays of AncLLysO variants revealed the functional importance of these substrate recognition residues and the plug loop. R76A and E383D variants were also observed to lose their activity, and the kcat/Km value of G251P and Y253A mutations were approximately 800- to 1800-fold lower than that of AncLLysO, despite the indirect interaction of the substrates with the mutated residues. Taken together, our data demonstrate that combinational approaches to sequence classification from database and ancestral sequence reconstruction may be effective not only to find new enzymes using databases of unknown sequences but also to elucidate their functions.
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Affiliation(s)
- Sayaka Sugiura
- Graduate Division of Nutritional and Environmental Sciences, University of Shizuoka, Suruga-ku, Shizuoka, Japan
| | - Shogo Nakano
- Graduate Division of Nutritional and Environmental Sciences, University of Shizuoka, Suruga-ku, Shizuoka, Japan; PREST, Japan Science and Technology Agency, Kawaguchi, Japan.
| | - Masazumi Niwa
- Graduate Division of Nutritional and Environmental Sciences, University of Shizuoka, Suruga-ku, Shizuoka, Japan
| | - Fumihito Hasebe
- Graduate Division of Nutritional and Environmental Sciences, University of Shizuoka, Suruga-ku, Shizuoka, Japan
| | - Daisuke Matsui
- Department of Biotechnology, College of Life Sciences, Ritsumeikan University, Kusatsu, Shiga, Japan
| | - Sohei Ito
- Graduate Division of Nutritional and Environmental Sciences, University of Shizuoka, Suruga-ku, Shizuoka, Japan
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8
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Semi-rational design of L-amino acid deaminase for production of pyruvate and D-alanine by Escherichia coli whole-cell biocatalyst. Amino Acids 2021; 53:1361-1371. [PMID: 34417892 DOI: 10.1007/s00726-021-03067-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2021] [Accepted: 08/09/2021] [Indexed: 10/20/2022]
Abstract
In our previous study, one-step pyruvate and D-alanine production from D,L-alanine by a whole-cell biocatalyst Escherichia coli expressing L-amino acid deaminase (Pm1) derived from Proteus mirabilis was investigated. However, due to the low catalytic efficiency of Pm1, the pyruvate titer was relatively low. Here, semi-rational design based on site-directed saturation mutagenesis was carried out to improve the catalytic efficiency of Pm1. A novel high-throughput screening (HTS) method for pyruvate based on 2,4-dinitrophenylhydrazine indicator was then established. The catalytic efficiency (kcat/Km) of the mutant V437I screened out by this method was 1.88 times higher than wild type. Next, to improve the growth of the engineered strain BLK07, the genes encoding for Xpk and Fbp were integrated into its genome to construct non-oxidative glycolysis (NOG) pathway. Finally, the CRISPR/Cas9 system was used to integrate the N6-pm1-V437I gene into the genome of BLK07. Pyruvic acid titer of the plasmid-free strain reached 42.20 g/L with an L-alanine conversion rate of 77.62% and a D-alanine resolution of 82.4%. This work would accelerate the industrial production of pyruvate and D-alanine by biocatalysis, and the HTS method established here could be used to screen other Pm1 mutants with high pyruvate titers.
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9
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Kozuka K, Nakano S, Asano Y, Ito S. Partial Consensus Design and Enhancement of Protein Function by Secondary-Structure-Guided Consensus Mutations. Biochemistry 2021; 60:2309-2319. [PMID: 34254784 DOI: 10.1021/acs.biochem.1c00309] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Consensus design (CD) is a representative sequence-based protein design method that enables the design of highly functional proteins by analyzing vast amounts of protein sequence data. This study proposes a partial consensus design (PCD) of a protein as a derivative approach of CD. The method replaces the target protein sequence with a consensus sequence in a secondary-structure-dependent manner (i.e., regionally dependent and divided into α-helix, β-sheet, and loop regions). In this study, we generated several artificial partial consensus l-threonine 3-dehydrogenases (PcTDHs) by PCD using the TDH from Cupriavidus necator (CnTDH) as a target protein. Structural and functional analysis of PcTDHs suggested that thermostability would be independently improved when consensus mutations are introduced into the loop region of TDHs. On the other hand, enzyme kinetic parameters (kcat/Km) and average productivity would be synergistically enhanced by changing the combination of the mutations-replacement of one region of CnTDH with a consensus sequence provided only negative effects, but the negative effects were nullified when the two regions were replaced simultaneously. Taken together, we propose the hypothesis that there are protein regions that encode individual protein properties, such as thermostability and activity, and that the introduction of consensus mutations into these regions could additively or synergistically modify their functions.
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Affiliation(s)
- Kohei Kozuka
- Graduate School of Integrated Pharmaceutical and Nutritional Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka, 422-8526, Japan
| | - Shogo Nakano
- Graduate School of Integrated Pharmaceutical and Nutritional Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka, 422-8526, Japan.,PREST, Japan Science and Technology Agency, Kawaguchi, Saitama 332-0012, Japan
| | - Yasuhisa Asano
- Biotechnology Research Center and Department of Biotechnology, Toyama Prefectural University, 5180 Kurokawa, Imizu, Toyama 939-0398, Japan
| | - Sohei Ito
- Graduate School of Integrated Pharmaceutical and Nutritional Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka, 422-8526, Japan
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10
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Pollegioni L, Molla G, Sacchi S, Murtas G. Human D-aspartate Oxidase: A Key Player in D-aspartate Metabolism. Front Mol Biosci 2021; 8:689719. [PMID: 34250021 PMCID: PMC8260693 DOI: 10.3389/fmolb.2021.689719] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Accepted: 06/09/2021] [Indexed: 11/15/2022] Open
Abstract
In recent years, the D-enantiomers of amino acids have been recognized as natural molecules present in all kingdoms, playing a variety of biological roles. In humans, d-serine and d-aspartate attracted attention for their presence in the central nervous system. Here, we focus on d-aspartate, which is involved in glutamatergic neurotransmission and the synthesis of various hormones. The biosynthesis of d-aspartate is still obscure, while its degradation is due to the peroxisomal flavin adenine dinucleotide (FAD)-containing enzyme d-aspartate oxidase. d-Aspartate emergence is strictly controlled: levels decrease in brain within the first days of life while increasing in endocrine glands postnatally and through adulthood. The human d-aspartate oxidase (hDASPO) belongs to the d-amino acid oxidase-like family: its tertiary structure closely resembles that of human d-amino acid oxidase (hDAAO), the enzyme that degrades neutral and basic d-amino acids. The structure-function relationships of the physiological isoform of hDASPO (named hDASPO_341) and the regulation of gene expression and distribution and properties of the longer isoform hDASPO_369 have all been recently elucidated. Beyond the substrate preference, hDASPO and hDAAO also differ in kinetic efficiency, FAD-binding affinity, pH profile, and oligomeric state. Such differences suggest that evolution diverged to create two different ways to modulate d-aspartate and d-serine levels in the human brain. Current knowledge about hDASPO is shedding light on the molecular mechanisms underlying the modulation of d-aspartate levels in human tissues and is pushing novel, targeted therapeutic strategies. Now, it has been proposed that dysfunction in NMDA receptor-mediated neurotransmission is caused by disrupted d-aspartate metabolism in the nervous system during the onset of various disorders (such as schizophrenia): the design of suitable hDASPO inhibitors aimed at increasing d-aspartate levels thus represents a novel and useful form of therapy.
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Affiliation(s)
- Loredano Pollegioni
- Department of Biotechnology and Life Sciences, University of Insubria, Varese, Italy
| | - Gianluca Molla
- Department of Biotechnology and Life Sciences, University of Insubria, Varese, Italy
| | - Silvia Sacchi
- Department of Biotechnology and Life Sciences, University of Insubria, Varese, Italy
| | - Giulia Murtas
- Department of Biotechnology and Life Sciences, University of Insubria, Varese, Italy
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11
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Pickl M, Marín-Valls R, Joglar J, Bujons J, Clapés P. Chemoenzymatic Production of Enantiocomplementary 2-Substituted 3-Hydroxycarboxylic Acids from L-α-Amino Acids. Adv Synth Catal 2021; 363:2866-2876. [PMID: 34276272 PMCID: PMC7611260 DOI: 10.1002/adsc.202100145] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Indexed: 12/14/2022]
Abstract
A two-enzyme cascade reaction plus in situ oxidative decarboxylation for the transformation of readily available canonical and non-canonical L-α-amino acids into 2-substituted 3-hydroxy-carboxylic acid derivatives is described. The biocatalytic cascade consisted of an oxidative deamination of L-α-amino acids by an L-α-amino acid deaminase from Cosenzaea myxofaciens, rendering 2-oxoacid intermediates, with an ensuing aldol addition reaction to formaldehyde, catalyzed by metal-dependent (R)- or (S)-selective carboligases namely 2-oxo-3-deoxy-l-rhamnonate aldolase (YfaU) and ketopantoate hydroxymethyltransferase (KPHMT), respectively, furnishing 3-substituted 4-hydroxy-2-oxoacids. The overall substrate conversion was optimized by balancing biocatalyst loading and amino acid and formaldehyde concentrations, yielding 36-98% aldol adduct formation and 91- 98% ee for each enantiomer. Subsequent in situ follow-up chemistry via hydrogen peroxide-driven oxidative decarboxylation afforded the corresponding 2-substituted 3-hydroxycarboxylic acid derivatives.
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Affiliation(s)
- Mathias Pickl
- Department of Chemical Biology. Institute for Advanced Chemistry of Catalonia (IQAC-CSIC), Jordi Girona 18–26, 08034 Barcelona, Spain
- Department of Chemistry, University of Graz, Heinrichstrasse 28, 8010 Graz, Austria
| | - Roser Marín-Valls
- Department of Chemical Biology. Institute for Advanced Chemistry of Catalonia (IQAC-CSIC), Jordi Girona 18–26, 08034 Barcelona, Spain
| | - Jesús Joglar
- Department of Chemical Biology. Institute for Advanced Chemistry of Catalonia (IQAC-CSIC), Jordi Girona 18–26, 08034 Barcelona, Spain
| | - Jordi Bujons
- Department of Chemical Biology. Institute for Advanced Chemistry of Catalonia (IQAC-CSIC), Jordi Girona 18–26, 08034 Barcelona, Spain
| | - Pere Clapés
- Department of Chemical Biology. Institute for Advanced Chemistry of Catalonia (IQAC-CSIC), Jordi Girona 18–26, 08034 Barcelona, Spain
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12
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Gao R, Li Z. Biosynthesis of 3-Hydroxy-3-Methylbutyrate from l-Leucine by Whole-Cell Catalysis. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:3712-3719. [PMID: 33734707 DOI: 10.1021/acs.jafc.1c00494] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
3-Hydroxy-3-methylbutyrate (HMB) is an important compound that can be used for the synthesis of a variety of chemicals in the food and pharmaceutical fields. Here, a biocatalytic method using l-leucine as a substrate was designed and constructed by expressing l-amino acid deaminase (l-AAD) and 4-hydroxyphenylpyruvate dioxygenase (4-HPPD) in Escherichia coli. To reduce the influence of the rate-limiting step on the cascade reaction, two 4-HPPD mutants were screened by rational design and both showed improved catalytic activity. Under optimal reaction conditions, the maximum conversion rate and production rate were 80% and 0.257 g/L·h, respectively. HMB production could be realized with high efficiency without an additional supply of adenosine triphosphate (ATP), which successfully overcomes the shortcomings of chemical production and fermentation methods. This design-based strategy of constructing a whole-cell catalyst system from l-leucine might serve as an alternative route to HMB synthesis.
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Affiliation(s)
- Ruichen Gao
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Zhimin Li
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
- Shanghai Collaborative Innovation Center for Biomanufacturing Technology, 130 Meilong Road, Shanghai 200237, China
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13
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Lee H, Kim D, Kim S, Lee HS. Conversion of Racemic Unnatural Amino Acids to Optically Pure Forms by a Coupled Enzymatic Reaction. Molecules 2021; 26:1274. [PMID: 33652889 PMCID: PMC7956486 DOI: 10.3390/molecules26051274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Accepted: 02/21/2021] [Indexed: 11/30/2022] Open
Abstract
Genetic code expansion (GCE) technology is a useful tool for the site-specific modification of proteins. An unnatural amino acid (UAA) is one of the essential components of this technique, typically required at high concentration (1 mM or higher) in growth medium. The supply of UAAs is an important limitation to the application of GCE technology, as many UAAs are either expansive or commercially unavailable. In this study, two UAAs in a racemic mixture were converted into optically pure forms using two enzymes, the d-amino acid oxidase (RgDAAO) from Rhodotorula gracilis and the aminotransferase (TtAT) from Thermus thermophilus. In the coupled enzyme system, RgDAAO oxidizes the d-form of UAAs in a stereospecific manner and produces the corresponding α-keto acids, which are then converted into the l-form of UAAs by TtAT, resulting in the quantitative and stereospecific conversion of racemic UAAs to optically pure forms. The genetic incorporation of the optically pure UAAs into a target protein produced a better protein yield than the same experiments using the racemic mixtures of the UAAs. This method could not only be used for the preparation of optically pure UAAs from racemic mixtures, but also the broad substrate specificity of both enzymes would allow for its expansion to structurally diverse UAAs.
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Affiliation(s)
| | | | | | - Hyun Soo Lee
- Department of Chemistry, Sogang University, 35 Baekbeomro Mapogu, Seoul 121-742, Korea; (H.L.); (D.K.); (S.K.)
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14
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Ancestral L-amino acid oxidases for deracemization and stereoinversion of amino acids. Commun Chem 2020; 3:181. [PMID: 36703379 PMCID: PMC9814856 DOI: 10.1038/s42004-020-00432-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Accepted: 11/10/2020] [Indexed: 01/29/2023] Open
Abstract
L-amino acid oxidases (LAAOs) can be applied to convert racemic amino acids to D-isomers, which are potential precursors of pharmaceuticals. However, this application is hampered by the lack of available stable and structure-determined LAAOs. In this study, we attempt to address this limitation by utilizing two ancestral LAAOs: AncLAAO-N4 and AncLAAO-N5. AncLAAO-N4 has the highest thermal and temporal stabilities among the designed LAAOs that can be used for deracemization and stereoinversion. AncLAAO-N5 can provide X-ray crystal structures, which are helpful to reveal substrate recognition and reaction mechanisms of LAAOs at the molecular level. Next, we attempted to improve activity of AncLAAO-N4 toward L-Val through a semi-rational protein engineering method. Three variants with enhanced activity toward L-Val were obtained. Taken together, we believe that the activity and substrate selectivity of AncLAAOs give them the potential to be key enzymes in various chemoenzymatic reactions.
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15
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Liu K, Gong M, Lv X, Li J, Du G, Liu L. Biotransformation and chiral resolution of d,l-alanine into pyruvate and d-alanine with a whole-cell biocatalyst expressing l-amino acid deaminase. Biotechnol Appl Biochem 2020; 67:668-676. [PMID: 32822096 DOI: 10.1002/bab.2011] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Accepted: 08/14/2020] [Indexed: 01/09/2023]
Abstract
Pyruvate is an important pharmaceutical intermediate and is widely used in food, nutraceuticals, and pharmaceuticals. However, high environmental pollution caused by chemical synthesis or complex separation process of microbial fermentation methods constrain the supply of pyruvate. Here, one-step pyruvate and d-alanine production from d,l-alanine by whole-cell biocatalysis was investigated. First, l-amino acid deaminase (Pm1) from Proteus mirabilis was expressed in Escherichia coli, resulting in pyruvate titer of 12.01 g/L. Then, N-terminal coding sequences were introduced to the 5'-end of the pm1 gene to enhance the expression of Pm1 and the pyruvate titer increased to 15.13 g/L. Next, product utilization by the biocatalyst was prevented by knocking out the pyruvate uptake transporters (cstA, btsT) and the pyruvate metabolic pathway genes pps, poxB, pflB, ldhA, and aceEF using CRISPR/Cas9, yielding 30.88 g/L pyruvate titer. Finally, by optimizing the reaction conditions, the pyruvate titer was further enhanced to 43.50 g/L in 8 H with a 79.99% l-alanine conversion rate; meanwhile, the resolution of d-alanine reached 84.0%. This work developed a whole-cell biocatalyst E. coli strain for high-yield, high-efficiency, and low-pollution pyruvate and d-alanine production, which has great potential for the commercial application in the future.
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Affiliation(s)
- Ke Liu
- Science Center for Future Foods, Jiangnan University, Wuxi, People's Republic of China
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, Jiangnan University, Wuxi, People's Republic of China
| | - Mengyue Gong
- School of Food Science and Technology, Jiangnan University, Wuxi, People's Republic of China
| | - Xueqin Lv
- Science Center for Future Foods, Jiangnan University, Wuxi, People's Republic of China
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, Jiangnan University, Wuxi, People's Republic of China
| | - Jianghua Li
- Science Center for Future Foods, Jiangnan University, Wuxi, People's Republic of China
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, Jiangnan University, Wuxi, People's Republic of China
| | - Guocheng Du
- Science Center for Future Foods, Jiangnan University, Wuxi, People's Republic of China
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, Jiangnan University, Wuxi, People's Republic of China
| | - Long Liu
- Science Center for Future Foods, Jiangnan University, Wuxi, People's Republic of China
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, Jiangnan University, Wuxi, People's Republic of China
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16
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Fabrication of a porous polymer membrane enzyme reactor and its enzymatic kinetics study in an artificial kidney model. Talanta 2020; 216:120963. [PMID: 32456898 DOI: 10.1016/j.talanta.2020.120963] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Revised: 03/18/2020] [Accepted: 03/21/2020] [Indexed: 01/05/2023]
Abstract
A porous polymer membrane-based d-amino acid oxidase (DAAO) reactor was developed that mimicked enzymatic activity in a renal ischemia model. Using glycidyl methacrylate as a biocompatible reactive monomer, poly(styrene-glycidyl methacrylate) was synthesized via a reversible addition fragment chain transfer polymerization technique. The prepared porous polymer membrane was used as a support to effectively immobilize DAAO. Compared to DAAO modified on nonporous polymer membrane and free DAAO in solution, the constructed porous polymer membrane-based DAAO enzyme reactor displayed 3-fold and 19-fold increase in enzymolysis efficiency, respectively. In addition, a chiral ligand exchange capillary electrophoresis system for DAAO was used to study DAAO enzymatic kinetics with d,l-methionine as the substrate. The proposed porous polymer membrane-based enzyme reactor showed excellent performance both on reproducibility and stability. Moreover, the enzyme reactor was successfully applied to mimic DAAO activity in a renal ischemia model. These results demonstrated that the enzyme could be efficiently immobilized onto a porous polymer membrane as an enzyme reactor and has great potential in mimicking the enzymatic activity in kidney.
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17
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Martínez-Rodríguez S, Torres JM, Sánchez P, Ortega E. Overview on Multienzymatic Cascades for the Production of Non-canonical α-Amino Acids. Front Bioeng Biotechnol 2020; 8:887. [PMID: 32850740 PMCID: PMC7431475 DOI: 10.3389/fbioe.2020.00887] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Accepted: 07/09/2020] [Indexed: 12/11/2022] Open
Abstract
The 22 genetically encoded amino acids (AAs) present in proteins (the 20 standard AAs together with selenocysteine and pyrrolysine), are commonly referred as proteinogenic AAs in the literature due to their appearance in ribosome-synthetized polypeptides. Beyond the borders of this key set of compounds, the rest of AAs are generally named imprecisely as non-proteinogenic AAs, even when they can also appear in polypeptide chains as a result of post-transductional machinery. Besides their importance as metabolites in life, many of D-α- and L-α-"non-canonical" amino acids (NcAAs) are of interest in the biotechnological and biomedical fields. They have found numerous applications in the discovery of new medicines and antibiotics, drug synthesis, cosmetic, and nutritional compounds, or in the improvement of protein and peptide pharmaceuticals. In addition to the numerous studies dealing with the asymmetric synthesis of NcAAs, many different enzymatic pathways have been reported in the literature allowing for the biosynthesis of NcAAs. Due to the huge heterogeneity of this group of molecules, this review is devoted to provide an overview on different established multienzymatic cascades for the production of non-canonical D-α- and L-α-AAs, supplying neophyte and experienced professionals in this field with different illustrative examples in the literature. Whereas the discovery of new or newly designed enzymes is of great interest, dusting off previous enzymatic methodologies by a "back and to the future" strategy might accelerate the implementation of new or improved multienzymatic cascades.
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18
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Pollegioni L, Rosini E, Molla G. Advances in Enzymatic Synthesis of D-Amino Acids. Int J Mol Sci 2020; 21:E3206. [PMID: 32369969 PMCID: PMC7247363 DOI: 10.3390/ijms21093206] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 04/27/2020] [Accepted: 04/28/2020] [Indexed: 01/02/2023] Open
Abstract
In nature, the D-enantiomers of amino acids (D-AAs) are not used for protein synthesis and during evolution acquired specific and relevant physiological functions in different organisms. This is the reason for the surge in interest and investigations on these "unnatural" molecules observed in recent years. D-AAs are increasingly used as building blocks to produce pharmaceuticals and fine chemicals. In past years, a number of methods have been devised to produce D-AAs based on enantioselective enzymes. With the aim to increase the D-AA derivatives generated, to improve the intrinsic atomic economy and cost-effectiveness, and to generate processes at low environmental impact, recent studies focused on identification, engineering and application of enzymes in novel biocatalytic processes. The aim of this review is to report the advances in synthesis of D-AAs gathered in the past few years based on five main classes of enzymes. These enzymes have been combined and thus applied to multi-enzymatic processes representing in vitro pathways of alternative/exchangeable enzymes that allow the generation of an artificial metabolism for D-AAs synthetic purposes.
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Affiliation(s)
| | | | - Gianluca Molla
- Department of Biotechnology and Life Sciences, University of Insubria, via J.H. Dunant 3, 21100 Varese, Italy; (L.P.); (E.R.)
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19
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Nakano S, Minamino Y, Hasebe F, Ito S. Deracemization and Stereoinversion to Aromatic d-Amino Acid Derivatives with Ancestral l-Amino Acid Oxidase. ACS Catal 2019. [DOI: 10.1021/acscatal.9b03418] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Shogo Nakano
- Graduate School of Integrated Pharmaceutical and Nutritional Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Yuki Minamino
- Graduate School of Integrated Pharmaceutical and Nutritional Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Fumihito Hasebe
- Graduate School of Integrated Pharmaceutical and Nutritional Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Sohei Ito
- Graduate School of Integrated Pharmaceutical and Nutritional Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
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20
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Ju S, Qian M, Xu G, Yang L, Wu J. Chemoenzymatic Approach to (
S
)‐1,2,3,4‐Tetrahydroisoquinoline Carboxylic Acids Employing D‐Amino Acid Oxidase. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900178] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Shuyun Ju
- Institute of Bioengineering, College of Chemical and Biological EngineeringZhejiang University Hangzhou 310027 People's Republic of China
| | - Mingxin Qian
- Tongli Biomedical Co., Ltd 1# Guotai North Road, Zhangjiagang Economic Development Zone Zhangjiagang 215600, Jiangsu People's Republic of China
| | - Gang Xu
- Institute of Bioengineering, College of Chemical and Biological EngineeringZhejiang University Hangzhou 310027 People's Republic of China
| | - Lirong Yang
- Institute of Bioengineering, College of Chemical and Biological EngineeringZhejiang University Hangzhou 310027 People's Republic of China
| | - Jianping Wu
- Institute of Bioengineering, College of Chemical and Biological EngineeringZhejiang University Hangzhou 310027 People's Republic of China
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21
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Parmeggiani F, Rué Casamajo A, Walton CJW, Galman JL, Turner NJ, Chica RA. One-Pot Biocatalytic Synthesis of Substituted d-Tryptophans from Indoles Enabled by an Engineered Aminotransferase. ACS Catal 2019. [DOI: 10.1021/acscatal.9b00739] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Fabio Parmeggiani
- Manchester Institute of Biotechnology (MIB), School of Chemistry, University of Manchester, 131 Princess Street, M1 7DN, Manchester, United Kingdom
| | - Arnau Rué Casamajo
- Manchester Institute of Biotechnology (MIB), School of Chemistry, University of Manchester, 131 Princess Street, M1 7DN, Manchester, United Kingdom
| | - Curtis J. W. Walton
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie-Curie, K1N 6N5, Ottawa, Ontario, Canada
- Centre for Catalysis Research and Innovation, University of Ottawa, 30 Marie-Curie, K1N 6N5, Ottawa, Ontario, Canada
| | - James L. Galman
- Manchester Institute of Biotechnology (MIB), School of Chemistry, University of Manchester, 131 Princess Street, M1 7DN, Manchester, United Kingdom
| | - Nicholas J. Turner
- Manchester Institute of Biotechnology (MIB), School of Chemistry, University of Manchester, 131 Princess Street, M1 7DN, Manchester, United Kingdom
| | - Roberto A. Chica
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie-Curie, K1N 6N5, Ottawa, Ontario, Canada
- Centre for Catalysis Research and Innovation, University of Ottawa, 30 Marie-Curie, K1N 6N5, Ottawa, Ontario, Canada
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22
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Properties of l-amino acid deaminase: En route to optimize bioconversion reactions. Biochimie 2019; 158:199-207. [DOI: 10.1016/j.biochi.2019.01.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Accepted: 01/18/2019] [Indexed: 12/24/2022]
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23
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Zhang D, Jing X, Zhang W, Nie Y, Xu Y. Highly selective synthesis of d-amino acids from readily available l-amino acids by a one-pot biocatalytic stereoinversion cascade. RSC Adv 2019; 9:29927-29935. [PMID: 35531513 PMCID: PMC9072125 DOI: 10.1039/c9ra06301c] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Accepted: 09/16/2019] [Indexed: 11/21/2022] Open
Abstract
d-Amino acids are key intermediates required for the synthesis of important pharmaceuticals. However, establishing a universal enzymatic method for the general synthesis of d-amino acids from cheap and readily available precursors with few by-products is challenging. In this study, we constructed and optimized a cascade enzymatic route involving l-amino acid deaminase and d-amino acid dehydrogenase for the biocatalytic stereoinversions of l-amino acids into d-amino acids. Using l-phenylalanine (l-Phe) as a model substrate, this artificial biocatalytic cascade stereoinversion route first deaminates l-Phe to phenylpyruvic acid (PPA) through catalysis involving recombinant Escherichia coli cells that express l-amino acid deaminase from Proteus mirabilis (PmLAAD), followed by stereoselective reductive amination with recombinant meso-diaminopimelate dehydrogenase from Symbiobacterium thermophilum (StDAPDH) to produce d-phenylalanine (d-Phe). By incorporating a formate dehydrogenase-based NADPH-recycling system, d-Phe was obtained in quantitative yield with an enantiomeric excess greater than 99%. In addition, the cascade reaction system was also used to stereoinvert a variety of aromatic and aliphatic l-amino acids to the corresponding d-amino acids by combining the PmLAAD whole-cell biocatalyst with the StDAPDH variant. Hence, this method represents a concise and efficient route for the asymmetric synthesis of d-amino acids from the corresponding l-amino acids. An efficient one-pot biocatalytic cascade was developed for synthesis of d-amino acids from readily available l-amino acids via stereoinversion.![]()
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Affiliation(s)
- Danping Zhang
- School of Biotechnology
- Key Laboratory of Industrial Biotechnology
- Ministry of Education
- Jiangnan University
- Wuxi 214122
| | - Xiaoran Jing
- School of Biotechnology
- Key Laboratory of Industrial Biotechnology
- Ministry of Education
- Jiangnan University
- Wuxi 214122
| | - Wenli Zhang
- School of Biotechnology
- Key Laboratory of Industrial Biotechnology
- Ministry of Education
- Jiangnan University
- Wuxi 214122
| | - Yao Nie
- School of Biotechnology
- Key Laboratory of Industrial Biotechnology
- Ministry of Education
- Jiangnan University
- Wuxi 214122
| | - Yan Xu
- School of Biotechnology
- Key Laboratory of Industrial Biotechnology
- Ministry of Education
- Jiangnan University
- Wuxi 214122
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24
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Melis R, Rosini E, Pirillo V, Pollegioni L, Molla G. In vitro evolution of an l-amino acid deaminase active on l-1-naphthylalanine. Catal Sci Technol 2018. [DOI: 10.1039/c8cy01380b] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
l-Amino acid deaminase from Proteus myxofaciens (PmaLAAD) is a promising biocatalyst for enantioselective biocatalysis that can be exploited to produce optically pure d-amino acids or α-keto acids.
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Affiliation(s)
- Roberta Melis
- Dipartimento di Biotecnologie e Scienze della Vita
- Università degli Studi dell'Insubria
- 21100 Varese
- Italy
| | - Elena Rosini
- Dipartimento di Biotecnologie e Scienze della Vita
- Università degli Studi dell'Insubria
- 21100 Varese
- Italy
| | - Valentina Pirillo
- Dipartimento di Biotecnologie e Scienze della Vita
- Università degli Studi dell'Insubria
- 21100 Varese
- Italy
| | - Loredano Pollegioni
- Dipartimento di Biotecnologie e Scienze della Vita
- Università degli Studi dell'Insubria
- 21100 Varese
- Italy
| | - Gianluca Molla
- Dipartimento di Biotecnologie e Scienze della Vita
- Università degli Studi dell'Insubria
- 21100 Varese
- Italy
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