1
|
Zhu Y, Chen P, Dong Q, Li Q, Liu D, Liu T, Liu W, Sun Y. Protein engineering of transaminase facilitating enzyme cascade reaction for the biosynthesis of azasugars. iScience 2024; 27:109034. [PMID: 38433920 PMCID: PMC10904899 DOI: 10.1016/j.isci.2024.109034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2023] [Revised: 12/28/2023] [Accepted: 01/23/2024] [Indexed: 03/05/2024] Open
Abstract
Azasugars, such as 1-deoxynojirimycin (1-DNJ), exhibit unique physiological functions and hold promising applications in medicine and health fields. However, the biosynthesis of 1-DNJ is hindered by the low activity and thermostability of the transaminase. In this study, the transaminase from Mycobacterium vanbaalenii (MvTA) with activity toward d-fructose was engineered through semi-rational design and high-throughput screening method. The final mutant M9-1 demonstrated a remarkable 31.2-fold increase in specific activity and an impressive 200-fold improvement in thermostability compared to the wild-type enzyme. Molecular dynamics (MD) simulations revealed that the mutation sites of H69R and K145R in M9-1 played crucial roles in the binding of the amino acceptor and donor, leading to the stable conformation of substrates within the active pocket. An enzyme cascade reaction was developed using M9-1 and the dehydrogenase from Paenibacillus polymyxa (GutB1) for the production of mannojirimycin (MJ), which provided a new idea for the in vitro biosynthesis of 1-DNJ.
Collapse
Affiliation(s)
- Yueming Zhu
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, National Technology Innovation Center of Synthetic Biology, Tianjin 300308, China
| | - Peng Chen
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, National Technology Innovation Center of Synthetic Biology, Tianjin 300308, China
| | - Qianzhen Dong
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, National Technology Innovation Center of Synthetic Biology, Tianjin 300308, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Qian Li
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, National Technology Innovation Center of Synthetic Biology, Tianjin 300308, China
| | - Dechuan Liu
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, National Technology Innovation Center of Synthetic Biology, Tianjin 300308, China
| | - Tao Liu
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, National Technology Innovation Center of Synthetic Biology, Tianjin 300308, China
| | - Weidong Liu
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, National Technology Innovation Center of Synthetic Biology, Tianjin 300308, China
| | - Yuanxia Sun
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, National Technology Innovation Center of Synthetic Biology, Tianjin 300308, China
| |
Collapse
|
2
|
Swanson CB, Ford GJ, Mattey AP, Gourbeyre L, Flitsch SL. Biocatalytic Cascades toward Iminosugar Scaffolds Reveal Promiscuous Activity of Shikimate Dehydrogenases. ACS CENTRAL SCIENCE 2023; 9:103-108. [PMID: 36712485 PMCID: PMC9881201 DOI: 10.1021/acscentsci.2c01169] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Indexed: 06/18/2023]
Abstract
Iminosugar scaffolds are highly sought-after pharmaceutical targets, but their chemical synthesis is lengthy and can suffer from poor scalability and purification. Here we report protecting-group-free chemoenzymatic and biocatalytic cascades to synthesize iminosugars from sugar-derived aminopolyols in two steps. Using galactose oxidase variant F2 followed by a chemical or enzymatic reduction provided an efficient one-pot route to these targets, with product formation >70%. Key to success of this strategy was the application of genome mining, which identified bacterial shikimate dehydrogenases as promiscuous iminosugar reductases. The cell-free protocols allowed for isolation of highly polar iminosugar products from biotransformations in a single step through development of a gradient-elution cation exchange purification. The two-step pathway provides a short synthetic route that can be used as a cell-free platform for broader iminosugar synthesis.
Collapse
|
3
|
Yeow K, Haarr MB, Muldoon J, O'Reilly E. Preparation of iminosugars from aminopolyols via selective oxidation using galactose oxidase. Chem Commun (Camb) 2022; 58:13640-13643. [PMID: 36409216 DOI: 10.1039/d2cc04989a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Minimally protected aminopolyols are novel substrates for the galactose oxidase variant F2. Site-selective oxidation proceeds at the terminal primary alcohol, followed by spontaneous cyclisation to afford stable hemiaminal/hemiacetal anomers of the piperidine and azepane scaffolds, with isolated yields of up to 94%. Simultaneous deprotection and reduction occured readily to afford valuable and biologically relevant iminosugars.
Collapse
Affiliation(s)
- Kathryn Yeow
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland.
| | - Marianne B Haarr
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland.
| | - Jimmy Muldoon
- Mass Spectrometry Facility, School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Elaine O'Reilly
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland.
| |
Collapse
|
4
|
Ford G, Swanson CR, Bradshaw Allen RT, Marshall JR, Mattey AP, Turner NJ, Clapés P, Flitsch SL. Three-Component Stereoselective Enzymatic Synthesis of Amino-Diols and Amino-Polyols. JACS AU 2022; 2:2251-2258. [PMID: 36311836 PMCID: PMC9597598 DOI: 10.1021/jacsau.2c00374] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/26/2022] [Revised: 08/19/2022] [Accepted: 08/19/2022] [Indexed: 06/16/2023]
Abstract
Amino-polyols represent attractive chemical building blocks but can be challenging to synthesize because of the high density of asymmetric functionalities and the need for extensive protecting-group strategies. Here we present a three-component strategy for the stereoselective enzymatic synthesis of amino-diols and amino-polyols using a diverse set of prochiral aldehydes, hydroxy ketones, and amines as starting materials. We were able to combine biocatalytic aldol reactions, using variants of d-fructose-6-phosphate aldolase (FSA), with reductive aminations catalyzed by IRED-259, identified from a metagenomic library. A two-step process, without the need for intermediate isolation, was developed to avoid cross-reactivity of the carbonyl components. Stereoselective formation of the 2R,3R,4R enantiomers of amino-polyols was observed and confirmed by X-ray crystallography.
Collapse
Affiliation(s)
- Grayson
J. Ford
- Manchester
Institute of Biotechnology (MIB) & School of Chemistry, The University of Manchester, 131 Princess Street, Manchester M1 7DN, U.K.
| | - Christopher R. Swanson
- Manchester
Institute of Biotechnology (MIB) & School of Chemistry, The University of Manchester, 131 Princess Street, Manchester M1 7DN, U.K.
| | - Ruth T. Bradshaw Allen
- Manchester
Institute of Biotechnology (MIB) & School of Chemistry, The University of Manchester, 131 Princess Street, Manchester M1 7DN, U.K.
| | - James R. Marshall
- Manchester
Institute of Biotechnology (MIB) & School of Chemistry, The University of Manchester, 131 Princess Street, Manchester M1 7DN, U.K.
| | - Ashley P. Mattey
- Manchester
Institute of Biotechnology (MIB) & School of Chemistry, The University of Manchester, 131 Princess Street, Manchester M1 7DN, U.K.
| | - Nicholas J. Turner
- Manchester
Institute of Biotechnology (MIB) & School of Chemistry, The University of Manchester, 131 Princess Street, Manchester M1 7DN, U.K.
| | - Pere Clapés
- Biological
Chemistry Department, Institute for Advanced
Chemistry of Catalonia, IQAC−CSIC, 08034 Barcelona, Spain
| | - Sabine L. Flitsch
- Manchester
Institute of Biotechnology (MIB) & School of Chemistry, The University of Manchester, 131 Princess Street, Manchester M1 7DN, U.K.
| |
Collapse
|
5
|
Unveiling the mechanism for selective cleavage of C-C bonds in sugar reactions on tungsten trioxide-based catalysts. Proc Natl Acad Sci U S A 2022; 119:e2206399119. [PMID: 35984900 PMCID: PMC9407445 DOI: 10.1073/pnas.2206399119] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Conversion of naturally occurring sugars, the most abundant biomass resources on Earth, to fuels and chemicals provides a sustainable and carbon-neutral alternative to the current fossil resource-based processes. Tungsten-based catalysts (e.g., WO3) are efficient for selectively cleaving C-C bonds of sugars to C2,3 oxygenate intermediates (e.g., glycolaldehyde) that can serve as platform molecules with high viability and versatility in the synthesis of various chemicals. Such C-C bond cleavage follows a mechanism distinct from the classical retro-aldol condensation. Kinetic, isotope 13C-labeling, and spectroscopic studies and theoretical calculations, reveal that the reaction proceeds via a surface tridentate complex as the critical intermediate on WO3, formed by chelating both α- and β-hydroxyls of sugars, together with the carbonyl group, with two adjacent tungsten atoms (W-O-W) contributing to the β-C-C bond cleavage. This mechanism provides insights into sugar chemistry and enables the rational design of catalytic sites and reaction pathways toward the efficient utilization of sugar-based feedstocks.
Collapse
|
6
|
Sheludko YV, Slagman S, Gittings S, Charnock SJ, Land H, Berglund P, Fessner WD. Enantioselective Synthesis of Pharmaceutically Relevant Bulky Arylbutylamines Using Engineered Transaminases. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
| | | | - Samantha Gittings
- Prozomix Limited UNITED KINGDOM OF GREAT BRITAIN AND NORTHERN IRELAND
| | - Simon J. Charnock
- Prozomix Limited UNITED KINGDOM OF GREAT BRITAIN AND NORTHERN IRELAND
| | | | | | | |
Collapse
|
7
|
Santana AG, Herrera AJ, González CC. Intramolecular Metal-Free C(sp 3)-H Activation Enables a Selective Mono O-Debenzylation of Fully Protected Aminosugars. J Org Chem 2021; 86:16736-16752. [PMID: 34807601 DOI: 10.1021/acs.joc.1c01977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Carbamate-bearing benzylated aminosugars undergo an I2/I(III)-promoted intramolecular hydrogen atom transfer (IHAT) followed by a nucleophilic attack to provide polycyclic structures. Thus, suitably positioned benzyl ethers are surgically oxidized into the corresponding mixed N/O-benzylidene acetals, which can be conveniently deprotected under mild acidic conditions to grant access to selectively O-deprotected aminosugars amenable for further derivatization. The scope of this strategy has been proven with a series of furanosic and pyranosic scaffolds. Preliminary mechanistic studies, including Hammett LFER and KIE analyses, support a reaction pathway with nucleophilic cyclization as the rate-determining step.
Collapse
Affiliation(s)
- Andrés G Santana
- Instituto de Productos Naturales y Agrobiología del C.S.I.C., Avenida Astrofísico Francisco Sánchez 3, 38206 La Laguna, Tenerife, Spain
| | - Antonio J Herrera
- Instituto de Productos Naturales y Agrobiología del C.S.I.C., Avenida Astrofísico Francisco Sánchez 3, 38206 La Laguna, Tenerife, Spain
| | - Concepción C González
- Instituto de Productos Naturales y Agrobiología del C.S.I.C., Avenida Astrofísico Francisco Sánchez 3, 38206 La Laguna, Tenerife, Spain
| |
Collapse
|
8
|
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.
Collapse
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.
| |
Collapse
|
9
|
Seo Y, Lowe JM, Romano N, Gagné MR. Switching between X-Pyrano-, X-Furano-, and Anhydro- X-pyranoside Synthesis (X = C, N) under Lewis acid Catalyzed Conditions. Org Lett 2021; 23:5636-5640. [PMID: 34259527 DOI: 10.1021/acs.orglett.1c01713] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A variety of C-glycosides can be obtained from the fluoroarylborane (B(C6F5)3) or silylium (R3Si+) catalyzed functionalization of 1-MeO- and per-TMS-sugars with TMS-X reagents. A one-step functionalization with a change as simple as the addition order and/or Lewis acid and TMS-X enables one to afford chiral synthons that are common (C-pyranosides), have few viable synthetic methods (C-furanosides), or are virtually unknown (anhydro-C-pyranosides), which mechanistically arise from whether a direct substitution, isomerization/substitution, or substitution/isomerization occurs, respectively.
Collapse
Affiliation(s)
- Youngran Seo
- Department of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Jared M Lowe
- Department of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Neyen Romano
- Department of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Michel R Gagné
- Department of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| |
Collapse
|
10
|
Corrado ML, Knaus T, Mutti FG. High Regio- and Stereoselective Multi-enzymatic Synthesis of All Phenylpropanolamine Stereoisomers from β-Methylstyrene. Chembiochem 2021; 22:2345-2350. [PMID: 33880862 PMCID: PMC8359840 DOI: 10.1002/cbic.202100123] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Revised: 04/20/2021] [Indexed: 12/16/2022]
Abstract
We present a one‐pot cascade for the synthesis of phenylpropanolamines (PPAs) in high optical purities (er and dr up to >99.5 %) and analytical yields (up to 95 %) by using 1‐phenylpropane‐1,2‐diols as key intermediates. This bioamination entails the combination of an alcohol dehydrogenase (ADH), an ω‐transaminase (ωTA) and an alanine dehydrogenase to create a redox‐neutral network, which harnesses the exquisite and complementary regio‐ and stereo‐selectivities of the selected ADHs and ωTAs. The requisite 1‐phenylpropane‐1,2‐diol intermediates were obtained from trans‐ or cis‐β‐methylstyrene by combining a styrene monooxygenase with epoxide hydrolases. Furthermore, in selected cases, the envisioned cascade enabled to obtain the structural isomer (1S,2R)‐1‐amino‐1‐phenylpropan‐2‐ol in high optical purity (er and dr >99.5 %). This is the first report on an enzymatic method that enables to obtain all of the four possible PPA stereoisomers in great enantio‐ and diastereo‐selectivity.
Collapse
Affiliation(s)
- Maria L Corrado
- Van't Hoff Institute for Molecular Sciences, HIMS-Biocat, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The Netherlands
| | - Tanja Knaus
- Van't Hoff Institute for Molecular Sciences, HIMS-Biocat, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The Netherlands
| | - Francesco G Mutti
- Van't Hoff Institute for Molecular Sciences, HIMS-Biocat, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The Netherlands
| |
Collapse
|
11
|
Szpara R, Goyder A, Porter MJ, Hailes HC, Sheppard TD. Regioselective Dehydration of Sugar Thioacetals under Mild Conditions. Org Lett 2021; 23:2488-2492. [PMID: 33729808 PMCID: PMC8041386 DOI: 10.1021/acs.orglett.1c00424] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
![]()
Sugars
are abundant in waste biomass, making them sustainable chiral
building blocks for organic synthesis. The demand for chiral saturated
heterocyclic rings for pharmaceutical applications is increasing as
they provide well-defined three-dimensional frameworks that show increased
metabolic resistance. A range of sugar thioacetals can be dehydrated
selectively at C-2 under mild basic conditions, and the resulting
ketene thioacetals can be applied to the production of useful chiral
building blocks via further selective dehydration reactions.
Collapse
Affiliation(s)
- Rachel Szpara
- Department of Chemistry, Christopher Ingold Laboratories, University College London, 20 Gordon Street, London WC1H 0AJ, U.K
| | - Alexander Goyder
- Department of Chemistry, Christopher Ingold Laboratories, University College London, 20 Gordon Street, London WC1H 0AJ, U.K
| | - Michael J Porter
- Department of Chemistry, Christopher Ingold Laboratories, University College London, 20 Gordon Street, London WC1H 0AJ, U.K
| | - Helen C Hailes
- Department of Chemistry, Christopher Ingold Laboratories, University College London, 20 Gordon Street, London WC1H 0AJ, U.K
| | - Tom D Sheppard
- Department of Chemistry, Christopher Ingold Laboratories, University College London, 20 Gordon Street, London WC1H 0AJ, U.K
| |
Collapse
|
12
|
Kuska J, Taday F, Yeow K, Ryan J, O'Reilly E. An in vitro–in vivo sequential cascade for the synthesis of iminosugars from aldoses. Catal Sci Technol 2021. [DOI: 10.1039/d1cy00698c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Here, we report a chemoenzymatic approach for the preparation of a small panel of biologically important iminosugars from readily available aldoses, employing a transaminase in combination with Gluconobacter oxydans whole cells.
Collapse
Affiliation(s)
| | - Freya Taday
- School of Chemistry
- University Park
- Nottingham
- UK
| | - Kathryn Yeow
- School of Chemistry
- University College Dublin
- Dublin 4
- Ireland
| | - James Ryan
- School of Chemistry
- University College Dublin
- Dublin 4
- Ireland
| | | |
Collapse
|
13
|
Catalytic amidation of natural and synthetic polyol esters with sulfonamides. Nat Commun 2019; 10:3881. [PMID: 31462632 PMCID: PMC6713792 DOI: 10.1038/s41467-019-11864-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Accepted: 08/08/2019] [Indexed: 02/02/2023] Open
Abstract
Triacylglycerides are naturally abundant and renewable feedstock for biofuels and chemicals. In this report, these seemingly stable compounds are shown to be reactive toward a variety of sulfonamides under Lewis acid catalysis. In these reactions, alkyl C(sp3)–O bonds are cleaved and C–N bonds constructed, providing functionalized value-added products directly from renewables. Mechanistic and scope study demonstrate that the origin of the reactivity could be the synergy of Lewis acid catalysis and neighboring group participation by the 2- or 3-acyloxy or acylamido group with respect to the reactive site. Since poly(ethylene terephthalate) (PET), a widely available consumer polyester, also contains 1,2-diol diester group as the repeating unit in the main chain, this chemistry can also be applied to efficient depolymerization of PET. Triacylglycerides are naturally abundant and renewable feedstock, but their chemical transformation is hindered by their stability. Here, under Lewis acid catalysis, the authors report the selective alkyl C–O bond conversion of triglycerides into C–N bonds and even apply this efficient method to PET depolymerization.
Collapse
|
14
|
Subrizi F, Benhamou L, Ward JM, Sheppard TD, Hailes HC. Aminopolyols from Carbohydrates: Amination of Sugars and Sugar-Derived Tetrahydrofurans with Transaminases. Angew Chem Int Ed Engl 2019; 58:3854-3858. [PMID: 30690839 PMCID: PMC6492202 DOI: 10.1002/anie.201813712] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2018] [Indexed: 01/09/2023]
Abstract
Carbohydrates are the major component of biomass and have unique potential as a sustainable source of building blocks for chemicals, materials, and biofuels because of their low cost, ready availability, and stereochemical diversity. With a view to upgrading carbohydrates to access valuable nitrogen-containing sugar-like compounds such as aminopolyols, biocatalytic aminations using transaminase enzymes (TAms) have been investigated as a sustainable alternative to traditional synthetic strategies. Demonstrated here is the reaction of TAms with sugar-derived tetrahydrofuran (THF) aldehydes, obtained from the regioselective dehydration of biomass-derived sugars, to provide access to cyclic aminodiols in high yields. In a preliminary study we have also established the direct transamination of sugars to give acyclic aminopolyols. Notably, the reaction of the ketose d-fructose proceeds with complete stereoselectivity to yield valuable aminosugars in high purity.
Collapse
Affiliation(s)
- Fabiana Subrizi
- Department of ChemistryUniversity College London20 Gordon StreetLondonWC1H 0AJUK
| | - Laure Benhamou
- Department of ChemistryUniversity College London20 Gordon StreetLondonWC1H 0AJUK
| | - John M. Ward
- Department of Biochemical EngineeringUniversity College LondonBernard Katz BuildingLondonWC1E 6BTUK
| | - Tom D. Sheppard
- Department of ChemistryUniversity College London20 Gordon StreetLondonWC1H 0AJUK
| | - Helen C. Hailes
- Department of ChemistryUniversity College London20 Gordon StreetLondonWC1H 0AJUK
| |
Collapse
|
15
|
Abstract
A personal selection of 32 recent papers is presented covering various aspects of current developments in bioorganic chemistry and novel natural products such as niduterpenoid A from Aspergillus nidulans.
Collapse
|