1
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De Maria A, Nieto-Domínguez M, Nikel PI. Synthesis of fluorinated amino acids by low-specificity, promiscuous aldolases coupled to in situ fluorodonor generation. Methods Enzymol 2024; 696:199-229. [PMID: 38658080 DOI: 10.1016/bs.mie.2024.02.016] [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] [Indexed: 04/26/2024]
Abstract
Fluorine (F) is an important element in the synthesis of molecules broadly used in medicine, agriculture, and materials. F addition to organic structures represents a unique strategy for tuning molecular properties, yet this atom is rarely found in Nature and approaches to produce fluorometabolites (such as fluorinated amino acids, key building blocks for synthesis) are relatively scarce. This chapter discusses the use of L-threonine aldolase enzymes (LTAs), a class of enzymes that catalyze reversible aldol addition to the α-carbon of glycine. The C-C bond formation ability of LTAs, together with their known substrate promiscuity, make them ideal for in vitro F biocatalysis. Here, we describe protocols to harness the activity of the low-specificity LTAs isolated from Escherichia coli and Pseudomonas putida on 2-fluoroacetaldehyde to efficiently synthesize 4-fluoro-L-threonine in vitro. This chapter also provides a comprehensive account of experimental protocols to implement these activities in vivo. These methods are illustrative and can be adapted to produce other fluorometabolites of interest.
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Affiliation(s)
- Alberto De Maria
- The Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Manuel Nieto-Domínguez
- The Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Pablo I Nikel
- The Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark, Kongens Lyngby, Denmark.
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2
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Fansher DJ, Palmer DRJ. A Type 1 Aldolase, NahE, Catalyzes a Stereoselective Nitro-Michael Reaction: Synthesis of β-Aryl-γ-nitrobutyric Acids. Angew Chem Int Ed Engl 2023; 62:e202214539. [PMID: 36484780 DOI: 10.1002/anie.202214539] [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: 10/03/2022] [Revised: 11/27/2022] [Accepted: 12/07/2022] [Indexed: 12/13/2022]
Abstract
Michael addition reactions are highly useful in organic synthesis and are commonly accomplished using organocatalysts. However, the corresponding biocatalytic Michael additions are rare, typically lack synthetically useful substrate scope, and suffer from low stereoselectivity. Herein we report a biocatalytic nitro-Michael addition, catalyzed by NahE, that proceeds with low catalyst loading at room temperature in moderate to excellent enantioselectivity and high yields. A series of β-nitrostyrenes reacted with pyruvate in the presence of NahE to give, after oxidative decarboxylation, β-aryl-γ-nitrobutyric acids in up to 99 % yield without need for chromatography, providing a simple preparative-scale route to chiral GABA analogues. This reaction represents the first example of an aldolase displaying promiscuous Michaelase activity and opens the use of nitroalkenes in place of aldehydes as substrates for aldolases.
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Affiliation(s)
- Douglas J Fansher
- Department of Chemistry, University of Saskatchewan, Saskatoon, Saskatchewan, S7N 5C9, Canada
| | - David R J Palmer
- Department of Chemistry, University of Saskatchewan, Saskatoon, Saskatchewan, S7N 5C9, Canada
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3
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Fang J, Turner LE, Chang MCY. Biocatalytic Asymmetric Construction of Secondary and Tertiary Fluorides from β-Fluoro-α-Ketoacids. Angew Chem Int Ed Engl 2022; 61:e202201602. [PMID: 35165991 DOI: 10.1002/anie.202201602] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Indexed: 12/24/2022]
Abstract
Fluorine is a critical element for the design of bioactive compounds, driving advances in selective and sustainable fluorination. However, stereogenic tertiary fluorides pose a synthetic challenge and are thus present in only a few approved drugs (fluticasone, solithromycin, and sofosbuvir). The aldol reaction of fluorinated donors provides an atom-economical approach to asymmetric C-F motifs via C-C bond formation. We report that the type II pyruvate aldolase HpcH and engineered variants perform addition of β-fluoro-α-ketoacids (including fluoropyruvate, β-fluoro-α-ketobutyrate, and β-fluoro-α-ketovalerate) to diverse aldehydes. The reactivity of HpcH towards these fluoro-donors grants access to enantiopure secondary or tertiary fluorides. In addition to representing the first synthesis of tertiary fluorides via biocatalytic carboligation, the afforded products could improve the diversity of fluorinated building blocks and enable the synthesis of fluorinated drug analogs.
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Affiliation(s)
- Jason Fang
- Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720, USA
| | - Laura E Turner
- Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720, USA
| | - Michelle C Y Chang
- Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720, USA.,Department of Chemical & Biomolecular Engineering, University of California, Berkeley, Berkeley, CA 94720, USA.,Department of Molecular & Cell Biology, University of California, Berkeley, Berkeley, CA 94720, USA
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4
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Zong X, Liu S, Zhang Z, Ji L, Zhang T, Jia Z, Loh TP. Fluoride Anion Catalyzed Mukaiyama-Aldol Reaction: Rapid Access to α-Fluoro-β-hydroxy Esters. J Org Chem 2022; 87:6918-6926. [PMID: 35443775 DOI: 10.1021/acs.joc.2c00240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The Mukaiyama-aldol reaction is probably one of the most efficient strategies to prepare synthetically useful β-hydroxy carbonyl compounds. However, only several reported methods were concerned with the accesses to α-fluoro-β-hydroxy esters. Herein, we report a protocol for a fluoride anion-mediated Mukaiyama aldol reaction with low catalytic loading in a short reaction time to incorporate fluorine at the α position into β-hydroxy esters. The method shows good functional-group tolerance and scale-up potential, moreover, is applicable to the late-stage modification of natural products and small molecular drugs.
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Affiliation(s)
- Xinlong Zong
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing, 211816, China
| | - Shuanglei Liu
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing, 211816, China
| | - Zhenguo Zhang
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing, 211816, China
| | - Liang Ji
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing, 211816, China
| | - Ting Zhang
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing, 211816, China
| | - Zhenhua Jia
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing, 211816, China
| | - Teck-Peng Loh
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing, 211816, China
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5
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Fang J, Turner LE, Chang MCY. Biocatalytic Asymmetric Construction of Secondary and Tertiary Fluorides from β‐Fluoro‐α‐Ketoacids**. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202201602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Jason Fang
- Department of Chemistry University of California, Berkeley Berkeley CA 94720 USA
| | - Laura E. Turner
- Department of Chemistry University of California, Berkeley Berkeley CA 94720 USA
| | - Michelle C. Y. Chang
- Department of Chemistry University of California, Berkeley Berkeley CA 94720 USA
- Department of Chemical & Biomolecular Engineering University of California, Berkeley Berkeley CA 94720 USA
- Department of Molecular & Cell Biology University of California, Berkeley Berkeley CA 94720 USA
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6
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Hélaine V, Gastaldi C, Lemaire M, Clapés P, Guérard-Hélaine C. Recent Advances in the Substrate Selectivity of Aldolases. ACS Catal 2021. [DOI: 10.1021/acscatal.1c04273] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Virgil Hélaine
- Université Clermont Auvergne, CNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand, 63000 Clermont-Ferrand, France
| | - Cédric Gastaldi
- Université Clermont Auvergne, CNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand, 63000 Clermont-Ferrand, France
| | - Marielle Lemaire
- Université Clermont Auvergne, CNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand, 63000 Clermont-Ferrand, France
| | - Pere Clapés
- Biological Chemistry Department, Institute for Advanced Chemistry of Catalonia, IQAC−CSIC, 08034 Barcelona, Spain
| | - Christine Guérard-Hélaine
- Université Clermont Auvergne, CNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand, 63000 Clermont-Ferrand, France
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7
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Pickl M. Recent trends in the stereoselective synthesis of (poly)-substituted 2-oxo acids by biocatalyzed aldol reaction. CURRENT OPINION IN GREEN AND SUSTAINABLE CHEMISTRY 2021; 30:100476. [PMID: 34141957 PMCID: PMC7610986 DOI: 10.1016/j.cogsc.2021.100476] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Recently, an increased interest toward enzymatic carboligation was observed, as biocatalytic carbon-carbon bond formation is a common obstacle in retrosynthetic planning. The construction of extended 2-oxoacid frameworks by 2-oxoacid aldolases and enzymes acting as aldolases is a potent tool for synthetic chemists since a broad spectrum of downstream reactions through functional group interconversions gives access to a plethora of compound classes. In the search for selective biocatalysts, successful protein engineering efforts and high throughput screenings from biodiversity expand the structural diversity of nucleophile and electrophile substrates. Several successful examples with an emphasis on reactions catalyzed by class II aldolases and enzymes acting as class II aldolases are highlighted, including reactions in which both enantiomeric products and in selected cases even diastereomeric products are accessed.
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Affiliation(s)
- Mathias Pickl
- Institute of Chemistry, University of Graz, Heinrichstrasse 28, 8010, Graz, Austria
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8
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Fansher DJ, Granger R, Kaur S, Palmer DRJ. Repurposing an Aldolase for the Chemoenzymatic Synthesis of Substituted Quinolines. ACS Catal 2021. [DOI: 10.1021/acscatal.1c01398] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Douglas J. Fansher
- Department of Chemistry, University of Saskatchewan, Saskatoon, Saskatchewan, Canada S7N 5C9
| | - Richard Granger
- Department of Chemistry, University of Saskatchewan, Saskatoon, Saskatchewan, Canada S7N 5C9
| | - Satinderpal Kaur
- Department of Chemistry, University of Saskatchewan, Saskatoon, Saskatchewan, Canada S7N 5C9
| | - David R. J. Palmer
- Department of Chemistry, University of Saskatchewan, Saskatoon, Saskatchewan, Canada S7N 5C9
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9
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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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10
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Moreno CJ, Hernández K, Charnok SJ, Gittings S, Bolte M, Joglar J, Bujons J, Parella T, Clapés P. Synthesis of γ-Hydroxy-α-amino Acid Derivatives by Enzymatic Tandem Aldol Addition-Transamination Reactions. ACS Catal 2021; 11:4660-4669. [PMID: 34603828 PMCID: PMC8482765 DOI: 10.1021/acscatal.1c00210] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Revised: 03/20/2021] [Indexed: 12/26/2022]
Abstract
![]()
Three
enzymatic routes toward γ-hydroxy-α-amino acids
by tandem aldol addition–transamination one-pot two-step reactions
are reported. The approaches feature an enantioselective aldol addition
of pyruvate to various nonaromatic aldehydes catalyzed by trans-o-hydroxybenzylidene pyruvate hydratase-aldolase
(HBPA) from Pseudomonas putida. This
affords chiral 4-hydroxy-2-oxo acids, which were subsequently enantioselectively
aminated using S-selective transaminases. Three transamination
processes were investigated involving different amine donors and transaminases:
(i) l-Ala as an amine donor with pyruvate recycling, (ii)
a benzylamine donor using benzaldehyde lyase from Pseudomonas
fluorescens Biovar I (BAL) to transform the benzaldehyde
formed into benzoin, minimizing equilibrium limitations, and (iii) l-Glu as an amine donor with a double cascade comprising branched-chain
α-amino acid aminotransferase (BCAT) and aspartate amino transferase
(AspAT), both from E. coli, using l-Asp as a substrate to regenerate l-Glu. The γ-hydroxy-α-amino
acids thus obtained were transformed into chiral α-amino-γ-butyrolactones,
structural motifs found in many biologically active compounds and
valuable intermediates for the synthesis of pharmaceutical agents.
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Affiliation(s)
- Carlos J. Moreno
- Institute for Advanced Chemistry of Catalonia, Department of Biological Chemistry, IQAC-CSIC, Jordi Girona 18-24, Barcelona 08034, Spain
| | - Karel Hernández
- Institute for Advanced Chemistry of Catalonia, Department of Biological Chemistry, IQAC-CSIC, Jordi Girona 18-24, Barcelona 08034, Spain
| | - Simon J. Charnok
- Prozomix Ltd. West End Industrial Estate, Haltwhistle, Northumberland NE49 9HA, U.K
| | - Samantha Gittings
- Prozomix Ltd. West End Industrial Estate, Haltwhistle, Northumberland NE49 9HA, U.K
| | - Michael Bolte
- Institut für Anorganische Chemie, J.-W.-Goethe-Universität, Frankfurt/Main, Germany
| | - Jesús Joglar
- Institute for Advanced Chemistry of Catalonia, Department of Biological Chemistry, IQAC-CSIC, Jordi Girona 18-24, Barcelona 08034, Spain
| | - Jordi Bujons
- Institute for Advanced Chemistry of Catalonia, Department of Biological Chemistry, IQAC-CSIC, Jordi Girona 18-24, Barcelona 08034, Spain
| | - Teodor Parella
- Servei de Ressonància Magnètica Nuclear, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - Pere Clapés
- Institute for Advanced Chemistry of Catalonia, Department of Biological Chemistry, IQAC-CSIC, Jordi Girona 18-24, Barcelona 08034, Spain
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11
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Nieto-Domínguez M, Nikel PI. Intersecting Xenobiology and Neometabolism To Bring Novel Chemistries to Life. Chembiochem 2020; 21:2551-2571. [PMID: 32274875 DOI: 10.1002/cbic.202000091] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Revised: 04/09/2020] [Indexed: 12/19/2022]
Abstract
The diversity of life relies on a handful of chemical elements (carbon, oxygen, hydrogen, nitrogen, sulfur and phosphorus) as part of essential building blocks; some other atoms are needed to a lesser extent, but most of the remaining elements are excluded from biology. This circumstance limits the scope of biochemical reactions in extant metabolism - yet it offers a phenomenal playground for synthetic biology. Xenobiology aims to bring novel bricks to life that could be exploited for (xeno)metabolite synthesis. In particular, the assembly of novel pathways engineered to handle nonbiological elements (neometabolism) will broaden chemical space beyond the reach of natural evolution. In this review, xeno-elements that could be blended into nature's biosynthetic portfolio are discussed together with their physicochemical properties and tools and strategies to incorporate them into biochemistry. We argue that current bioproduction methods can be revolutionized by bridging xenobiology and neometabolism for the synthesis of new-to-nature molecules, such as organohalides.
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Affiliation(s)
- Manuel Nieto-Domínguez
- The Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark, 2800, Kongens Lyngby, Denmark
| | - Pablo I Nikel
- The Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark, 2800, Kongens Lyngby, Denmark
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12
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Li H, Hu J, Wei H, Solomon PS, Stubbs KA, Chooi YH. Biosynthesis of a Tricyclo[6.2.2.0 2,7 ]dodecane System by a Berberine Bridge Enzyme-Like Aldolase. Chemistry 2019; 25:15062-15066. [PMID: 31553484 DOI: 10.1002/chem.201904360] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2019] [Indexed: 11/06/2022]
Abstract
The aldol reaction is one of the most fundamental stereocontrolled carbon-carbon bond-forming reactions and is mainly catalyzed by aldolases in nature. Despite the fact that the aldol reaction has been widely proposed to be involved in fungal secondary metabolite biosynthesis, a dedicated aldolase that catalyzes stereoselective aldol reactions has only rarely been reported in fungi. Herein, we activated a cryptic polyketide biosynthetic gene cluster that was upregulated in the fungal wheat pathogen Parastagonospora nodorum during plant infection; this resulted in the production of the phytotoxic stemphyloxin II (1). Through heterologous reconstruction of the biosynthetic pathway and in vitro assay by using cell-free lysate from Aspergillus nidulans, we demonstrated that a berberine bridge enzyme (BBE)-like protein SthB catalyzes an intramolecular aldol reaction to establish the bridged tricyclo[6.2.2.02,7 ]dodecane skeleton in the post-assembly tailoring step. The characterization of SthB as an aldolase enriches the catalytic toolbox of classic reactions and the functional diversities of the BBE superfamily of enzymes.
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Affiliation(s)
- Hang Li
- School of Molecular Sciences, The University of Western Australia, Perth, WA, 6009, Australia
| | - Jinyu Hu
- School of Molecular Sciences, The University of Western Australia, Perth, WA, 6009, Australia
| | - Haochen Wei
- Division of Plant Science, Research School of Biology, The Australian National University, Canberra, ACT, 2601, Australia
| | - Peter S Solomon
- Division of Plant Science, Research School of Biology, The Australian National University, Canberra, ACT, 2601, Australia
| | - Keith A Stubbs
- School of Molecular Sciences, The University of Western Australia, Perth, WA, 6009, Australia
| | - Yit-Heng Chooi
- School of Molecular Sciences, The University of Western Australia, Perth, WA, 6009, Australia
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13
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Izquierdo J, Demurget N, Landa A, Brinck T, Mercero JM, Dinér P, Oiarbide M, Palomo C. Asymmetric Synthesis of Adjacent Tri- and Tetrasubstituted Carbon Stereocenters: Organocatalytic Aldol Reaction of an Hydantoin Surrogate with Azaarene 2-Carbaldehydes. Chemistry 2019; 25:12431-12438. [PMID: 31318987 DOI: 10.1002/chem.201902817] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Revised: 07/15/2019] [Indexed: 12/13/2022]
Abstract
A bifunctional amine/squaramide catalyst promoted direct aldol addition of an hydantoin surrogate to pyridine 2-carbaldehyde N-oxides to afford adducts bearing two vicinal tertiary/quaternary carbons in high diastereo- and enantioselectivity (d.r. up to >20:1; ee up to 98 %) is reported. Acid hydrolysis of adducts followed by reduction of the N-oxide group yields enantiopure carbinol-tethered quaternary hydantoin-azaarene conjugates with densely functionalized skeletons. DFT studies of the potential energy surface (B3LYP/6-31+G(d)+CPCM (dichloromethane)) of the reaction correlate the activity of different catalysts and support an intramolecular hydrogen-bond-assisted activation of the squaramide moiety in the transition state of the catalytic reaction.
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Affiliation(s)
- June Izquierdo
- Departamento de Química Orgánica I, Universidad del País Vasco UPV/EHU, Manuel Lardizabal 3, 20018, San Sebastián, Spain
| | - Noémie Demurget
- Departamento de Química Orgánica I, Universidad del País Vasco UPV/EHU, Manuel Lardizabal 3, 20018, San Sebastián, Spain
| | - Aitor Landa
- Departamento de Química Orgánica I, Universidad del País Vasco UPV/EHU, Manuel Lardizabal 3, 20018, San Sebastián, Spain
| | - Tore Brinck
- Department of Chemistry, KTH Royal Institute of, Technology, Teknikringen 30, 100 44, Stockholm, Sweden
| | - Jose M Mercero
- Kimika Fakultatea, Euskal Herriko Unibertsitatea, (UPV/EHU) & Donostia International Physics Center (DIPC), Donostia, Spain
| | - Peter Dinér
- Department of Chemistry, KTH Royal Institute of, Technology, Teknikringen 30, 100 44, Stockholm, Sweden
| | - Mikel Oiarbide
- Departamento de Química Orgánica I, Universidad del País Vasco UPV/EHU, Manuel Lardizabal 3, 20018, San Sebastián, Spain
| | - Claudio Palomo
- Departamento de Química Orgánica I, Universidad del País Vasco UPV/EHU, Manuel Lardizabal 3, 20018, San Sebastián, Spain
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14
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Laurent V, Hélaine V, Vergne-Vaxelaire C, Nauton L, Traikia M, Petit JL, Salanoubat M, de Berardinis V, Lemaire M, Guérard-Hélaine C. Achiral Hydroxypyruvaldehyde Phosphate as a Platform for Multi-Aldolases Cascade Synthesis of Diuloses and for a Quadruple Acetaldehyde Addition Catalyzed by 2-Deoxyribose-5-Phosphate Aldolases. ACS Catal 2019. [DOI: 10.1021/acscatal.9b02668] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Victor Laurent
- Université Clermont Auvergne, CNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand, 63000 Clermont-Ferrand, France
| | - Virgil Hélaine
- Université Clermont Auvergne, CNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand, 63000 Clermont-Ferrand, France
| | - Carine Vergne-Vaxelaire
- Génomique Métabolique, Genoscope, Institut François Jacob, CEA, CNRS, Univ Evry, Univ Paris-Saclay, 91000 Evry, France
| | - Lionel Nauton
- Université Clermont Auvergne, CNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand, 63000 Clermont-Ferrand, France
| | - Mounir Traikia
- Université Clermont Auvergne, CNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand, 63000 Clermont-Ferrand, France
| | - Jean-Louis Petit
- Génomique Métabolique, Genoscope, Institut François Jacob, CEA, CNRS, Univ Evry, Univ Paris-Saclay, 91000 Evry, France
| | - Marcel Salanoubat
- Génomique Métabolique, Genoscope, Institut François Jacob, CEA, CNRS, Univ Evry, Univ Paris-Saclay, 91000 Evry, France
| | - Véronique de Berardinis
- Génomique Métabolique, Genoscope, Institut François Jacob, CEA, CNRS, Univ Evry, Univ Paris-Saclay, 91000 Evry, France
| | - Marielle Lemaire
- Université Clermont Auvergne, CNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand, 63000 Clermont-Ferrand, France
| | - Christine Guérard-Hélaine
- Université Clermont Auvergne, CNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand, 63000 Clermont-Ferrand, France
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15
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Fang J, Hait D, Head‐Gordon M, Chang MCY. Chemoenzymatic Platform for Synthesis of Chiral Organofluorines Based on Type II Aldolases. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201906805] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jason Fang
- Department of Chemistry University of California, Berkeley Berkeley CA 94720 USA
- Chemical Sciences Division Laurence Berkeley National Laboratory Berkeley CA 94720 USA
| | - Diptarka Hait
- Department of Chemistry University of California, Berkeley Berkeley CA 94720 USA
- Chemical Sciences Division Laurence Berkeley National Laboratory Berkeley CA 94720 USA
| | - Martin Head‐Gordon
- Department of Chemistry University of California, Berkeley Berkeley CA 94720 USA
- Chemical Sciences Division Laurence Berkeley National Laboratory Berkeley CA 94720 USA
| | - Michelle C. Y. Chang
- Department of Chemistry University of California, Berkeley Berkeley CA 94720 USA
- Chemical Sciences Division Laurence Berkeley National Laboratory Berkeley CA 94720 USA
- Department of Molecular & Cell Biology University of California, Berkeley Berkeley CA 94720 USA
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16
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Fang J, Hait D, Head-Gordon M, Chang MCY. Chemoenzymatic Platform for Synthesis of Chiral Organofluorines Based on Type II Aldolases. Angew Chem Int Ed Engl 2019; 58:11841-11845. [PMID: 31240790 DOI: 10.1002/anie.201906805] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Indexed: 12/15/2022]
Abstract
Aldolases are C-C bond forming enzymes that have become prominent tools for sustainable synthesis of complex synthons. However, enzymatic methods of fluorine incorporation into such compounds are lacking due to the rarity of fluorine in nature. Recently, the use of fluoropyruvate as a non-native aldolase substrate has arisen as a solution. Here, we report that the type II HpcH aldolases efficiently catalyze fluoropyruvate addition to diverse aldehydes, with exclusive (3S)-selectivity at fluorine that is rationalized by DFT calculations on a mechanistic model. We also measure the kinetic parameters of aldol addition and demonstrate engineering of the hydroxyl group stereoselectivity. Our aldolase collection is then employed in the chemoenzymatic synthesis of novel fluoroacids and ester derivatives in high stereopurity (d.r. 80-98 %). The compounds made available by this method serve as precursors to fluorinated analogs of sugars, amino acids, and other valuable chiral building blocks.
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Affiliation(s)
- Jason Fang
- Department of Chemistry, University of California, Berkeley, Berkeley, CA, 94720, USA.,Chemical Sciences Division, Laurence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Diptarka Hait
- Department of Chemistry, University of California, Berkeley, Berkeley, CA, 94720, USA.,Chemical Sciences Division, Laurence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Martin Head-Gordon
- Department of Chemistry, University of California, Berkeley, Berkeley, CA, 94720, USA.,Chemical Sciences Division, Laurence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Michelle C Y Chang
- Department of Chemistry, University of California, Berkeley, Berkeley, CA, 94720, USA.,Chemical Sciences Division, Laurence Berkeley National Laboratory, Berkeley, CA, 94720, USA.,Department of Molecular & Cell Biology, University of California, Berkeley, Berkeley, CA, 94720, USA
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17
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Green TK, Damarancha A, Vanagel M, Showalter B, Kolberg S, Thompson A. Stereoselective Reduction of α-Fluoro-β-keto Esters by NADH and NADPH-Dependent Ketoreductases. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900644] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Thomas K. Green
- Department of Chemistry & Biochemistry; Institute of Arctic Biology; University of Alaska Fairbanks; Fairbanks AK 99775 Alaska USA
| | - Anil Damarancha
- Department of Chemistry & Biochemistry; Institute of Arctic Biology; University of Alaska Fairbanks; Fairbanks AK 99775 Alaska USA
| | - Matthew Vanagel
- Department of Chemistry & Biochemistry; Institute of Arctic Biology; University of Alaska Fairbanks; Fairbanks AK 99775 Alaska USA
| | - Brandon Showalter
- Department of Chemistry & Biochemistry; Institute of Arctic Biology; University of Alaska Fairbanks; Fairbanks AK 99775 Alaska USA
| | - Sandra Kolberg
- Department of Chemistry & Biochemistry; Institute of Arctic Biology; University of Alaska Fairbanks; Fairbanks AK 99775 Alaska USA
| | - Alexander Thompson
- Department of Chemistry & Biochemistry; Institute of Arctic Biology; University of Alaska Fairbanks; Fairbanks AK 99775 Alaska USA
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18
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Laurent V, Uzel A, Hélaine V, Nauton L, Traïkia M, Gefflaut T, Salanoubat M, de Berardinis V, Lemaire M, Guérard‐Hélaine C. Exploration of Aldol Reactions Catalyzed by Stereoselective Pyruvate Aldolases with 2‐Oxobutyric Acid as Nucleophile. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900128] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- V. Laurent
- Université Clermont AuvergneCNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand 63000 Clermont-Ferrand France
| | - A. Uzel
- Université Clermont AuvergneCNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand 63000 Clermont-Ferrand France
| | - V. Hélaine
- Université Clermont AuvergneCNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand 63000 Clermont-Ferrand France
| | - L. Nauton
- Université Clermont AuvergneCNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand 63000 Clermont-Ferrand France
| | - M. Traïkia
- Université Clermont AuvergneCNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand 63000 Clermont-Ferrand France
| | - T. Gefflaut
- Université Clermont AuvergneCNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand 63000 Clermont-Ferrand France
| | - M. Salanoubat
- Génomique Métabolique, Génoscope, Institut François Jacob, CEA, CNRS, Univ. EvryUniversité Paris-Saclay 91057 Evry France
| | - V. de Berardinis
- Génomique Métabolique, Génoscope, Institut François Jacob, CEA, CNRS, Univ. EvryUniversité Paris-Saclay 91057 Evry France
| | - M. Lemaire
- Université Clermont AuvergneCNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand 63000 Clermont-Ferrand France
| | - C. Guérard‐Hélaine
- Université Clermont AuvergneCNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand 63000 Clermont-Ferrand France
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19
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Arcadi A, Chiarini M, Del Vecchio L, Marinelli F. 5-Exo-dig aminocylization/hydroxyfluorination of propargylic carbamates. J Fluor Chem 2018. [DOI: 10.1016/j.jfluchem.2018.04.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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20
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Hernández K, Szekrenyi A, Clapés P. Nucleophile Promiscuity of Natural and Engineered Aldolases. Chembiochem 2018; 19:1353-1358. [DOI: 10.1002/cbic.201800135] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Indexed: 01/01/2023]
Affiliation(s)
- Karel Hernández
- Department of Chemical Biology and Molecular Modelling; Catalonia Institute for Advanced Chemistry IQAC-CSIC; Jordi Girona 18-26 08034 Barcelona Spain
| | - Anna Szekrenyi
- Institut für Organische Chemie und Biochemie; Technische Universität Darmstadt; Alarich-Weiss-Strasse 4 64287 Darmstadt Germany
| | - Pere Clapés
- Department of Chemical Biology and Molecular Modelling; Catalonia Institute for Advanced Chemistry IQAC-CSIC; Jordi Girona 18-26 08034 Barcelona Spain
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21
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Danahy KE, Cooper JC, Van Humbeck JF. Benzylic Fluorination of Aza-Heterocycles Induced by Single-Electron Transfer to Selectfluor. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201801280] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Kelley E. Danahy
- Department of Chemistry; Massachusetts Institute of Technology; 77 Massachusetts Ave. Cambridge MA 02139 USA
| | - Julian C. Cooper
- Department of Chemistry; Massachusetts Institute of Technology; 77 Massachusetts Ave. Cambridge MA 02139 USA
| | - Jeffrey F. Van Humbeck
- Department of Chemistry; University of Calgary; 2500 University Drive N.W. Calgary Alberta T2N 1N4 Canada
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22
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Danahy KE, Cooper JC, Van Humbeck JF. Benzylic Fluorination of Aza-Heterocycles Induced by Single-Electron Transfer to Selectfluor. Angew Chem Int Ed Engl 2018; 57:5134-5138. [PMID: 29486098 DOI: 10.1002/anie.201801280] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Indexed: 01/20/2023]
Abstract
A selective and mild method for the benzylic fluorination of aromatic azaheterocycles with Selectfluor is described. These reactions take place by a previously unreported mechanism, in which electron transfer from the heterocyclic substrate to the electrophilic fluorinating agent Selectfluor eventually yields a benzylic radical, thus leading to the desired C-F bond formation. This mechanism enables high intra- and intermolecular selectivity for aza-heterocycles over other benzylic components with similar C-H bond-dissociation energies.
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Affiliation(s)
- Kelley E Danahy
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge, MA, 02139, USA
| | - Julian C Cooper
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge, MA, 02139, USA
| | - Jeffrey F Van Humbeck
- Department of Chemistry, University of Calgary, 2500 University Drive N.W., Calgary, Alberta, T2N 1N4, Canada
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23
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Schmidt NG, Pavkov‐Keller T, Richter N, Wiltschi B, Gruber K, Kroutil W. Biocatalytic Friedel-Crafts Acylation and Fries Reaction. Angew Chem Int Ed Engl 2017; 56:7615-7619. [PMID: 28544673 PMCID: PMC5488191 DOI: 10.1002/anie.201703270] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Revised: 04/26/2016] [Indexed: 11/07/2022]
Abstract
The Friedel-Crafts acylation is commonly used for the synthesis of aryl ketones, and a biocatalytic version, which may benefit from the chemo- and regioselectivity of enzymes, has not yet been introduced. Described here is a bacterial acyltransferase which can catalyze Friedel-Crafts C-acylation of phenolic substrates in buffer without the need of CoA-activated reagents. Conversions reach up to >99 %, and various C- or O-acyl donors, such as DAPG or isopropenyl acetate, are accepted by this enzyme. Furthermore the enzyme enables a Fries rearrangement-like reaction of resorcinol derivatives. These findings open an avenue for the development of alternative and selective C-C bond formation methods.
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Affiliation(s)
- Nina G. Schmidt
- ACIB GmbHPetersgasse 148010GrazAustria
- Institute of ChemistryUniversity of Graz, NAWI Graz, BioTechMed GrazHeinrichstraße 288010GrazAustria
| | - Tea Pavkov‐Keller
- ACIB GmbHPetersgasse 148010GrazAustria
- Institute of Molecular BiosciencesUniversity of GrazHumboldtstraße 50/38010GrazAustria
| | - Nina Richter
- ACIB GmbHPetersgasse 148010GrazAustria
- Institute of ChemistryUniversity of Graz, NAWI Graz, BioTechMed GrazHeinrichstraße 288010GrazAustria
| | | | - Karl Gruber
- ACIB GmbHPetersgasse 148010GrazAustria
- Institute of Molecular BiosciencesUniversity of GrazHumboldtstraße 50/38010GrazAustria
| | - Wolfgang Kroutil
- ACIB GmbHPetersgasse 148010GrazAustria
- Institute of ChemistryUniversity of Graz, NAWI Graz, BioTechMed GrazHeinrichstraße 288010GrazAustria
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24
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Schmidt NG, Pavkov-Keller T, Richter N, Wiltschi B, Gruber K, Kroutil W. Biocatalytic Friedel-Crafts Acylation and Fries Reaction. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201703270] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Nina G. Schmidt
- ACIB GmbH; Petersgasse 14 8010 Graz Austria
- Institute of Chemistry; University of Graz, NAWI Graz, BioTechMed Graz; Heinrichstraße 28 8010 Graz Austria
| | - Tea Pavkov-Keller
- ACIB GmbH; Petersgasse 14 8010 Graz Austria
- Institute of Molecular Biosciences; University of Graz; Humboldtstraße 50/3 8010 Graz Austria
| | - Nina Richter
- ACIB GmbH; Petersgasse 14 8010 Graz Austria
- Institute of Chemistry; University of Graz, NAWI Graz, BioTechMed Graz; Heinrichstraße 28 8010 Graz Austria
| | | | - Karl Gruber
- ACIB GmbH; Petersgasse 14 8010 Graz Austria
- Institute of Molecular Biosciences; University of Graz; Humboldtstraße 50/3 8010 Graz Austria
| | - Wolfgang Kroutil
- ACIB GmbH; Petersgasse 14 8010 Graz Austria
- Institute of Chemistry; University of Graz, NAWI Graz, BioTechMed Graz; Heinrichstraße 28 8010 Graz Austria
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25
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Hernández K, Gómez A, Joglar J, Bujons J, Parella T, Clapés P. 2-Keto-3-Deoxy-l-Rhamnonate Aldolase (YfaU) as Catalyst in Aldol Additions of Pyruvate to Amino Aldehyde Derivatives. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201700360] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Karel Hernández
- Catalonia Institute for Advanced Chemistry - IQAC-CSIC; Department of Chemical Biology and Molecular Modelling; Jordi Girona 18-26 08034 Barcelona Spain
| | - Ariadna Gómez
- Catalonia Institute for Advanced Chemistry - IQAC-CSIC; Department of Chemical Biology and Molecular Modelling; Jordi Girona 18-26 08034 Barcelona Spain
| | - Jesús Joglar
- Catalonia Institute for Advanced Chemistry - IQAC-CSIC; Department of Chemical Biology and Molecular Modelling; Jordi Girona 18-26 08034 Barcelona Spain
| | - Jordi Bujons
- Catalonia Institute for Advanced Chemistry - IQAC-CSIC; Department of Chemical Biology and Molecular Modelling; Jordi Girona 18-26 08034 Barcelona Spain
| | - Teodor Parella
- Servei de Ressonància Magnètica Nuclear; Facultat de Ciències; Universitat Autònoma de Barcelona; 08193 Cerdanyola del Vallès Barcelona Spain
| | - Pere Clapés
- Catalonia Institute for Advanced Chemistry - IQAC-CSIC; Department of Chemical Biology and Molecular Modelling; Jordi Girona 18-26 08034 Barcelona Spain
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26
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Aldolase-catalysed stereoselective synthesis of fluorinated small molecules. Curr Opin Chem Biol 2017; 37:33-38. [DOI: 10.1016/j.cbpa.2016.12.029] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Revised: 12/01/2016] [Accepted: 12/31/2016] [Indexed: 11/22/2022]
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27
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Extending enzyme molecular recognition with an expanded amino acid alphabet. Proc Natl Acad Sci U S A 2017; 114:2610-2615. [PMID: 28196894 DOI: 10.1073/pnas.1616816114] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Natural enzymes are constructed from the 20 proteogenic amino acids, which may then require posttranslational modification or the recruitment of coenzymes or metal ions to achieve catalytic function. Here, we demonstrate that expansion of the alphabet of amino acids can also enable the properties of enzymes to be extended. A chemical mutagenesis strategy allowed a wide range of noncanonical amino acids to be systematically incorporated throughout an active site to alter enzymic substrate specificity. Specifically, 13 different noncanonical side chains were incorporated at 12 different positions within the active site of N-acetylneuraminic acid lyase (NAL), and the resulting chemically modified enzymes were screened for activity with a range of aldehyde substrates. A modified enzyme containing a 2,3-dihydroxypropyl cysteine at position 190 was identified that had significantly increased activity for the aldol reaction of erythrose with pyruvate compared with the wild-type enzyme. Kinetic investigation of a saturation library of the canonical amino acids at the same position showed that this increased activity was not achievable with any of the 20 proteogenic amino acids. Structural and modeling studies revealed that the unique shape and functionality of the noncanonical side chain enabled the active site to be remodeled to enable more efficient stabilization of the transition state of the reaction. The ability to exploit an expanded amino acid alphabet can thus heighten the ambitions of protein engineers wishing to develop enzymes with new catalytic properties.
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28
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Cosimi E, Engl OD, Saadi J, Ebert MO, Wennemers H. Stereoselective Organocatalyzed Synthesis of α-Fluorinated β-Amino Thioesters and Their Application in Peptide Synthesis. Angew Chem Int Ed Engl 2016; 55:13127-13131. [DOI: 10.1002/anie.201607146] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Elena Cosimi
- ETH Zürich; Laboratory for Organic Chemistry; D-CHAB; Vladimir-Prelog-Weg 1-5/10 8093 Zürich Switzerland
| | - Oliver D. Engl
- ETH Zürich; Laboratory for Organic Chemistry; D-CHAB; Vladimir-Prelog-Weg 1-5/10 8093 Zürich Switzerland
| | - Jakub Saadi
- ETH Zürich; Laboratory for Organic Chemistry; D-CHAB; Vladimir-Prelog-Weg 1-5/10 8093 Zürich Switzerland
| | - Marc-Olivier Ebert
- ETH Zürich; Laboratory for Organic Chemistry; D-CHAB; Vladimir-Prelog-Weg 1-5/10 8093 Zürich Switzerland
| | - Helma Wennemers
- ETH Zürich; Laboratory for Organic Chemistry; D-CHAB; Vladimir-Prelog-Weg 1-5/10 8093 Zürich Switzerland
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29
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Cosimi E, Engl OD, Saadi J, Ebert MO, Wennemers H. Stereoselective Organocatalyzed Synthesis of α-Fluorinated β-Amino Thioesters and Their Application in Peptide Synthesis. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201607146] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Elena Cosimi
- ETH Zürich; Laboratory for Organic Chemistry; D-CHAB; Vladimir-Prelog-Weg 1-5/10 8093 Zürich Switzerland
| | - Oliver D. Engl
- ETH Zürich; Laboratory for Organic Chemistry; D-CHAB; Vladimir-Prelog-Weg 1-5/10 8093 Zürich Switzerland
| | - Jakub Saadi
- ETH Zürich; Laboratory for Organic Chemistry; D-CHAB; Vladimir-Prelog-Weg 1-5/10 8093 Zürich Switzerland
| | - Marc-Olivier Ebert
- ETH Zürich; Laboratory for Organic Chemistry; D-CHAB; Vladimir-Prelog-Weg 1-5/10 8093 Zürich Switzerland
| | - Helma Wennemers
- ETH Zürich; Laboratory for Organic Chemistry; D-CHAB; Vladimir-Prelog-Weg 1-5/10 8093 Zürich Switzerland
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30
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Howard JK, Müller M, Berry A, Nelson A. An Enantio- and Diastereoselective Chemoenzymatic Synthesis of α-Fluoro β-Hydroxy Carboxylic Esters. Angew Chem Int Ed Engl 2016; 55:6767-70. [PMID: 27090612 PMCID: PMC5074308 DOI: 10.1002/anie.201602852] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2016] [Indexed: 11/30/2022]
Abstract
The trans‐o‐hydroxybenzylidene pyruvate aldolase‐catalysed reactions between fluoropyruvate and many (hetero)aromatic aldehydes yield aldol adducts without subsequent dehydration. Treatment of the reaction products with hydrogen peroxide yields the corresponding syn‐configured α‐fluoro β‐hydroxy carboxylic acids which have >98 % ee. The overall chemoenzymatic approach, in which fluoropyruvate serves as a fluoroacetate equivalent, may be exploited in the synthesis of polar building blocks and fragments with potential value in drug discovery.
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Affiliation(s)
- James K Howard
- School of Chemistry and Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds, LS2 9JT, UK
| | - Marion Müller
- School of Molecular and Cellular Biology and Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds, LS2 9JT, UK
| | - Alan Berry
- School of Molecular and Cellular Biology and Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds, LS2 9JT, UK.
| | - Adam Nelson
- School of Chemistry and Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds, LS2 9JT, UK.
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31
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Hill RA, Sutherland A. Hot off the press. Nat Prod Rep 2016. [DOI: 10.1039/c6np90030e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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 euphorikanin A from Euphorbia kansui.
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