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Villamil V, Vairoletti F, Tijman A, López G, Peixoto de Abreu Lima A, Saiz C, Iglesias C, Mahler G. Novel Kinetic Resolution of Thiazolo-Benzimidazolines Using MAO Enzymes. ACS OMEGA 2023; 8:42114-42125. [PMID: 38024698 PMCID: PMC10652373 DOI: 10.1021/acsomega.3c03223] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 10/06/2023] [Accepted: 10/10/2023] [Indexed: 12/01/2023]
Abstract
The kinetic resolution of racemic 1H,3H-thiazolo[3,4-a]benzimidazoline (TBIM) heterocycles was achieved using E. coli whole cells expressing the MAO-N D11 enzyme. Several cosolvents were screened using TBIM 2a as the substrate. DMF was the best cosolvent, affording the pure enantiomer (+)-2a in 44% yield, 94% ee. The stereochemistry of TBIM was predicted by means of ab initio calculations of optical rotation and circular dichroism spectra. The reaction scope was investigated for 11 substituted (±) TBIM using an optimized protocol. The best yield and % ee were obtained for the nonsubstituted 2a. Among the substituted compounds, the 5-substituted-TBIM showed better % ee than the 4-substituted one. The small electron donor group (Me) led to better % ee than the electron-withdrawing groups (-NO2 and -CO2Et), and the bulky naphthyl group was detrimental for the kinetic resolution. Docking experiments and molecular dynamics (MD) simulations were employed to further understand the interactions between MAO-N D11 and the thiazolo-benzimidazoline substrates. For 2a, the MD showed favorable positioning and binding energy for both enantiomers, thus suggesting that this kinetic resolution is influenced not only by the active site but also by the entry tunnel. This work constitutes the first report of the enzymatic kinetic resolution applied to TBIM heterocycles.
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Affiliation(s)
- Valentina Villamil
- Departamento
de Química Orgánica, Laboratorio de Quimica Farmaceutica,
Facultad de Quimica, Universidad de la República, Gral Flores 2124, Montevideo, Montevideo 11800, Uruguay
| | - Franco Vairoletti
- Departamento
de Química Orgánica, Laboratorio de Quimica Farmaceutica,
Facultad de Quimica, Universidad de la República, Gral Flores 2124, Montevideo, Montevideo 11800, Uruguay
- Programa
de Posgrado en Quimica, Universidad de la
República Uruguay, Gral Flores 2124, Montevideo, Montevideo 11800, Uruguay
| | - Ariel Tijman
- Programa
de Posgrado en Quimica, Universidad de la
República Uruguay, Gral Flores 2124, Montevideo, Montevideo 11800, Uruguay
- Departamento
de Biociencias, Laboratorio de Microbiología Molecular, Facultad
de Quimica, Universidad de la Republica, Gral Flores 2124, Montevideo, Montevideo 11800, Uruguay
- Departamento
de Biociencias y Departamento de Quimica Organica, Laboratorio de
Biocatalisis y Biotransformaciones, Facultad de Quimica, Universidad de la Republica, Gral Flores 2124, Montevideo, Montevideo 11800, Uruguay
| | - Gonzalo López
- Programa
de Posgrado en Quimica, Universidad de la
República Uruguay, Gral Flores 2124, Montevideo, Montevideo 11800, Uruguay
- Departamento
de Biociencias, Laboratorio de Microbiología Molecular, Facultad
de Quimica, Universidad de la Republica, Gral Flores 2124, Montevideo, Montevideo 11800, Uruguay
- Departamento
de Biociencias y Departamento de Quimica Organica, Laboratorio de
Biocatalisis y Biotransformaciones, Facultad de Quimica, Universidad de la Republica, Gral Flores 2124, Montevideo, Montevideo 11800, Uruguay
| | - Alejandro Peixoto de Abreu Lima
- Departamento
de Química Orgánica, Laboratorio de Síntesis
Orgánica, Facultad de Quimica, Universidad
de la Republica, Gral
Flores 2124, Montevideo, Montevideo 11800, Uruguay
| | - Cecilia Saiz
- Departamento
de Química Orgánica, Laboratorio de Quimica Farmaceutica,
Facultad de Quimica, Universidad de la República, Gral Flores 2124, Montevideo, Montevideo 11800, Uruguay
| | - César Iglesias
- Departamento
de Biociencias, Laboratorio de Microbiología Molecular, Facultad
de Quimica, Universidad de la Republica, Gral Flores 2124, Montevideo, Montevideo 11800, Uruguay
- Departamento
de Biociencias y Departamento de Quimica Organica, Laboratorio de
Biocatalisis y Biotransformaciones, Facultad de Quimica, Universidad de la Republica, Gral Flores 2124, Montevideo, Montevideo 11800, Uruguay
| | - Graciela Mahler
- Departamento
de Química Orgánica, Laboratorio de Quimica Farmaceutica,
Facultad de Quimica, Universidad de la República, Gral Flores 2124, Montevideo, Montevideo 11800, Uruguay
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Gilio A, Thorpe TW, Heyam A, Petchey MR, Pogrányi B, France SP, Howard RM, Karmilowicz MJ, Lewis R, Turner N, Grogan G. A Reductive Aminase Switches to Imine Reductase Mode for a Bulky Amine Substrate. ACS Catal 2023; 13:1669-1677. [PMID: 36776386 PMCID: PMC9903292 DOI: 10.1021/acscatal.2c06066] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Indexed: 01/15/2023]
Abstract
Imine reductases (IREDs) catalyze the asymmetric reduction of cyclic imines, but also in some cases the coupling of ketones and amines to form secondary amine products in an enzyme-catalyzed reductive amination (RedAm) reaction. Enzymatic RedAm reactions have typically used small hydrophobic amines, but many interesting pharmaceutical targets require that larger amines be used in these coupling reactions. Following the identification of IR77 from Ensifer adhaerens as a promising biocatalyst for the reductive amination of cyclohexanone with pyrrolidine, we have characterized the ability of this enzyme to catalyze couplings with larger bicyclic amines such as isoindoline and octahydrocyclopenta(c)pyrrole. By comparing the activity of IR77 with reductions using sodium cyanoborohydride in water, it was shown that, while the coupling of cyclohexanone and pyrrolidine involved at least some element of reductive amination, the amination with the larger amines likely occurred ex situ, with the imine recruited from solution for enzyme reduction. The structure of IR77 was determined, and using this as a basis, structure-guided mutagenesis, coupled with point mutations selecting improving amino acid sites suggested by other groups, permitted the identification of a mutant A208N with improved activity for amine product formation. Improvements in conversion were attributed to greater enzyme stability as revealed by X-ray crystallography and nano differential scanning fluorimetry. The mutant IR77-A208N was applied to the preparative scale amination of cyclohexanone at 50 mM concentration, with 1.2 equiv of three larger amines, in isolated yields of up to 93%.
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Affiliation(s)
- Amelia
K. Gilio
- Department
of Chemistry, University of York, Heslington, York YO10 5DD, U.K.
| | - Thomas W. Thorpe
- School
of Chemistry, Manchester Institute of Biotechnology, University of Manchester, 131 Princess Street, Manchester M1 7DN, U.K.
| | - Alex Heyam
- Department
of Chemistry, University of York, Heslington, York YO10 5DD, U.K.
| | - Mark R. Petchey
- Department
of Chemistry, University of York, Heslington, York YO10 5DD, U.K.
| | - Balázs Pogrányi
- Department
of Chemistry, University of York, Heslington, York YO10 5DD, U.K.
| | - Scott P. France
- Pfizer
Worldwide Research and Development, 445 Eastern Point Road, Groton, Connecticut 06340, United States
| | - Roger M. Howard
- Pfizer
Worldwide Research and Development, 445 Eastern Point Road, Groton, Connecticut 06340, United States
| | - Michael J. Karmilowicz
- Pfizer
Worldwide Research and Development, 445 Eastern Point Road, Groton, Connecticut 06340, United States
| | - Russell Lewis
- Pfizer
Worldwide Research and Development, 445 Eastern Point Road, Groton, Connecticut 06340, United States
| | - Nicholas Turner
- School
of Chemistry, Manchester Institute of Biotechnology, University of Manchester, 131 Princess Street, Manchester M1 7DN, U.K.
| | - Gideon Grogan
- Department
of Chemistry, University of York, Heslington, York YO10 5DD, U.K.,
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Bennett M, Ducrot L, Vergne-Vaxelaire C, Grogan G. Structure and Mutation of the Native Amine Dehydrogenase MATOUAmDH2. Chembiochem 2022; 23:e202200136. [PMID: 35349204 PMCID: PMC9325545 DOI: 10.1002/cbic.202200136] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 03/28/2022] [Indexed: 11/06/2022]
Abstract
Native Amine Dehydrogenases (nat-AmDHs) have recently emerged as a potentially valuable new reservoir of enzymes for the sustainable and selective synthesis of chiral amines, catalyzing the NAD(P)H-dependent ammoniation of carbonyl compounds with high activity and selectivity. MATOUAmDH2, recently identified from the Marine Atlas of Tara Oceans Unigenes (MATOUv1) database of eukaryotic genes, displays exceptional catalytic performance against its best identified substrate, isobutyraldehyde, as well as broader substrate scope than other nat-AmDHs. In the interests of providing a platform for the rational engineering of this and other nat-AmDHs, we have determined the structure of MATOUAmDH2 in complex with NADP + and also with the cofactor and cyclohexylamine. Monomers within the structure are representative of more open and closed conformations of the enzyme and illustrate the profound changes undergone by nat-AmDHs during the catalytic cycle. An alanine screen of active site residues revealed that M215A and L180A are more active than the wild-type enzyme for the amination of cyclohexanone with ammonia and methylamine respectively, the latter suggesting that AmDHs have the potential to be engineered for the improved production of secondary amines.
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Affiliation(s)
- Megan Bennett
- University of York Department of Chemistry, Chemistry, UNITED KINGDOM
| | - Laurine Ducrot
- Genoscope National Sequencing Center: Commissariat a l'energie atomique et aux energies alternatives Genoscope centre national de sequencage, Génomique Métabolique, FRANCE
| | - Carine Vergne-Vaxelaire
- Genoscope National Sequencing Center: Commissariat a l'energie atomique et aux energies alternatives Genoscope centre national de sequencage, Génomique Métabolique, FRANCE
| | - Gideon Grogan
- University of York Department of Chemistry, Chemistry, Heslington, YO10 5DD, York, UNITED KINGDOM
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Klenk JM, Fischer MP, Dubiel P, Sharma M, Rowlinson B, Grogan G, Hauer B. Identification and characterization of cytochrome P450 1232A24 and 1232F1 from Arthrobacter sp. and their role in the metabolic pathway of papaverine. J Biochem 2019; 166:51-66. [DOI: 10.1093/jb/mvz010] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Accepted: 02/12/2019] [Indexed: 11/13/2022] Open
Abstract
AbstractCytochrome P450 monooxygenases (P450s) play crucial roles in the cell metabolism and provide an unsurpassed diversity of catalysed reactions. Here, we report the identification and biochemical characterization of two P450s from Arthrobacter sp., a Gram-positive organism known to degrade the opium alkaloid papaverine. Combining phylogenetic and genomic analysis suggested physiological roles for P450s in metabolism and revealed potential gene clusters with redox partners facilitating the reconstitution of the P450 activities in vitro. CYP1232F1 catalyses the para demethylation of 3,4-dimethoxyphenylacetic acid to homovanillic acid while CYP1232A24 continues demethylation to 3,4-dihydroxyphenylacetic acid. Interestingly, the latter enzyme is also able to perform both demethylation steps with preference for the meta position. The crystal structure of CYP1232A24, which shares only 29% identity to previous published structures of P450s helped to rationalize the preferred demethylation specificity for the meta position and also the broader substrate specificity profile. In addition to the detailed characterization of the two P450s using their physiological redox partners, we report the construction of a highly active whole-cell Escherichia coli biocatalyst expressing CYP1232A24, which formed up to 1.77 g l−1 3,4-dihydroxyphenylacetic acid. Our results revealed the P450s’ role in the metabolic pathway of papaverine enabling further investigation and application of these biocatalysts.
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Affiliation(s)
- Jan M Klenk
- Department of Technical Biochemistry, Institute of Biochemistry and Technical Biochemistry, University of Stuttgart, Allmandring 31, Stuttgart, Germany
| | - Max-Philipp Fischer
- Department of Technical Biochemistry, Institute of Biochemistry and Technical Biochemistry, University of Stuttgart, Allmandring 31, Stuttgart, Germany
| | - Paulina Dubiel
- Department of Chemistry, University of York, Heslington, York, UK
| | - Mahima Sharma
- Department of Chemistry, University of York, Heslington, York, UK
| | | | - Gideon Grogan
- Department of Chemistry, University of York, Heslington, York, UK
| | - Bernhard Hauer
- Department of Technical Biochemistry, Institute of Biochemistry and Technical Biochemistry, University of Stuttgart, Allmandring 31, Stuttgart, Germany
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5
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Batista VF, Galman JL, G. A. Pinto DC, Silva AMS, Turner NJ. Monoamine Oxidase: Tunable Activity for Amine Resolution and Functionalization. ACS Catal 2018. [DOI: 10.1021/acscatal.8b03525] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Vasco F. Batista
- Department of Chemistry & QOPNA, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - James L. Galman
- School of Chemistry, Manchester Institute of Biotechnology, University of Manchester, 131 Princess Street, Manchester, M1 7DN, U.K
| | - Diana C. G. A. Pinto
- Department of Chemistry & QOPNA, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - Artur M. S. Silva
- Department of Chemistry & QOPNA, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - Nicholas J. Turner
- School of Chemistry, Manchester Institute of Biotechnology, University of Manchester, 131 Princess Street, Manchester, M1 7DN, U.K
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Costa JH, da Costa BZ, de Angelis DA, Marsaioli AJ. Monoamine oxidase and transaminase screening: biotransformation of 2-methyl-6-alkylpiperidines by Neopestalotiopsis sp. CBMAI 2030. Appl Microbiol Biotechnol 2017; 101:6061-6070. [PMID: 28660289 PMCID: PMC5522522 DOI: 10.1007/s00253-017-8389-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Revised: 06/05/2017] [Accepted: 06/10/2017] [Indexed: 11/30/2022]
Abstract
High-throughput screening detected transaminases (TAs) and monoamine oxidases (MAOs) in fungi by applying a fluorogenic probe. Strains F026, F037, F041, F053, and F057 showed the highest enzymatic conversions (31, 60, 30, 40, and 32%, respectively) and where evaluated for their ability to transform piperidines. Strain F053 (Neopestalotiopsis sp. CBMAI 2030) revealed unusual enzymatic activity to deracemize 2-methyl-6-alkylpiperidines. Neopestalotiopsis sp. CBMAI 2030 was capable to convert 2-methyl-6-propylpiperidine, 2-methyl-6-butylpiperidine, and 2-methyl-6-pentylpiperidine in piperideine with 11, 14, and 24% conversion, respectively. The activity was enhanced by cultivating the fungus with 2-methyl-6-pentylpiperidine (38% conversion and 73% ee).
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Affiliation(s)
- Jonas Henrique Costa
- Institute of Chemistry, State University of Campinas-UNICAMP, PO Box 6154, Campinas, SP, 13083-970, Brazil
| | - Bruna Zucoloto da Costa
- Institute of Chemistry, State University of Campinas-UNICAMP, PO Box 6154, Campinas, SP, 13083-970, Brazil
| | - Derlene Attili de Angelis
- Division of Microbial Resources, Chemical, Biological and Agricultural Pluridisciplinary Research Center-CPQBA, State University of Campinas-UNICAMP, Campinas, SP, 13148-218, Brazil
| | - Anita Jocelyne Marsaioli
- Institute of Chemistry, State University of Campinas-UNICAMP, PO Box 6154, Campinas, SP, 13083-970, Brazil.
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7
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Markošová K, Dolejš I, Stloukal R, Rios-Solis L, Rosenberg M, Micheletti M, Lye GJ, Turner NJ, Rebroš M. Immobilisation and kinetics of monoamine oxidase (MAO-N-D5) enzyme in polyvinyl alcohol gels. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.molcatb.2016.04.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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8
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Hirano Y, Chonan K, Murayama K, Sakasegawa SI, Matsumoto H, Sugimori D. Syncephalastrum racemosum amine oxidase with high catalytic efficiency toward ethanolamine and its application in ethanolamine determination. Appl Microbiol Biotechnol 2015; 100:3999-4013. [PMID: 26691518 DOI: 10.1007/s00253-015-7198-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2015] [Revised: 11/17/2015] [Accepted: 11/24/2015] [Indexed: 10/22/2022]
Abstract
Our screening study yielded a copper amine oxidase (SrAOX) from Syncephalastrum racemosum, which showed much higher affinity and catalytic efficiency toward ethanolamine (EA) than any other amine oxidase (AOX). Following purification of the enzyme to electrophoretic homogeneity from a cell-free extract, the maximum activity toward EA was detected at pH 7.2-7.5 and 45 °C. The SrAOX complementary DNA (cDNA) was composed of a 2052-bp open reading frame encoding a 683-amino acid protein with a molecular mass of 77,162 Da. The enzyme functions as a homodimer. The deduced amino acid sequence of SrAOX showed 55.3 % identity to Rhizopus delemar AOX and contains two consensus sequences of Cu-AOX, NYDY, and HHQH, suggesting SrAOX is a type 1 Cu-AOX (i.e., a topaquinone enzyme). Structural homology modeling showed that residues (112)ML(113), (141)FADTWG(146) M158, and N318 are unique, and T144 possibly characterizes the substrate specificity of SrAOX. The recombinant enzyme (rSrAOX) was produced using Escherichia coli. Steady-state kinetic analysis of rSrAOX activity toward EA (pH 7.5 and 45 °C) gave K m and k cat values of 0.848 ± 0.009 mM and 9.11 ± 0.13 s(-1), respectively. The standard curves were linear between 0.1 and 2 mM EA, and 10 μg mL(-1)-2.5 mg mL(-1) (15 μM-3.6 mM) phosphatidylethanolamine using Streptomyces chromofuscus phospholipase D, respectively, was sufficiently sensitive for clinical use.
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Affiliation(s)
- Yoshitaka Hirano
- Department of Symbiotic Systems Science and Technology, Graduate School of Symbiotic Systems Science and Technology, Fukushima University, 1 Kanayagawa, Fukushima, 960-1296, Japan
| | - Keisuke Chonan
- Department of Symbiotic Systems Science and Technology, Graduate School of Symbiotic Systems Science and Technology, Fukushima University, 1 Kanayagawa, Fukushima, 960-1296, Japan
| | - Kazutaka Murayama
- Division of Biomedical Measurements and Diagnostics, Graduate School of Biomedical Engineering, Tohoku University, 2-1 Seiryo, Aoba, Sendai, 980-8575, Japan
| | | | - Hideyuki Matsumoto
- Asahi Kasei Pharma Corp, 632-1 Mifuku, Izunokuni, Shizuoka, 410-2321, Japan
| | - Daisuke Sugimori
- Department of Symbiotic Systems Science and Technology, Graduate School of Symbiotic Systems Science and Technology, Fukushima University, 1 Kanayagawa, Fukushima, 960-1296, Japan.
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9
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Rios-Solis L, Mothia B, Yi S, Zhou Y, Micheletti M, Lye G. High throughput screening of monoamine oxidase (MAO-N-D5) substrate selectivity and rapid kinetic model generation. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.molcatb.2015.07.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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10
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Man H, Wells E, Hussain S, Leipold F, Hart S, Turkenburg JP, Turner NJ, Grogan G. Structure, Activity and Stereoselectivity of NADPH-Dependent Oxidoreductases Catalysing the S-Selective Reduction of the Imine Substrate 2-Methylpyrroline. Chembiochem 2015; 16:1052-9. [PMID: 25809902 DOI: 10.1002/cbic.201402625] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2014] [Indexed: 11/09/2022]
Abstract
Oxidoreductases from Streptomyces sp. GF3546 [3546-IRED], Bacillus cereus BAG3X2 (BcIRED) and Nocardiopsis halophila (NhIRED) each reduce prochiral 2-methylpyrroline (2MPN) to (S)-2-methylpyrrolidine with >95 % ee and also a number of other imine substrates with good selectivity. Structures of BcIRED and NhIRED have helped to identify conserved active site residues within this subgroup of imine reductases that have S selectivity towards 2MPN, including a tyrosine residue that has a possible role in catalysis and superimposes with an aspartate in related enzymes that display R selectivity towards the same substrate. Mutation of this tyrosine residue-Tyr169-in 3546-IRED to Phe resulted in a mutant of negligible activity. The data together provide structural evidence for the location and significance of the Tyr residue in this group of imine reductases, and permit a comparison of the active sites of enzymes that reduce 2MPN with either R or S selectivity.
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Affiliation(s)
- Henry Man
- Department of Chemistry, University of York, Heslington, York, YO10 5DD (UK)
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11
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Jensen CN, Mielke T, Farrugia JE, Frank A, Man H, Hart S, Turkenburg JP, Grogan G. Structures of the Apo and FAD-bound forms of 2-hydroxybiphenyl 3-monooxygenase (HbpA) locate activity hotspots identified by using directed evolution. Chembiochem 2015; 16:968-76. [PMID: 25737306 PMCID: PMC4515095 DOI: 10.1002/cbic.201402701] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2014] [Indexed: 11/09/2022]
Abstract
The FAD-dependent monooxygenase HbpA from Pseudomonas azelaica HBP1 catalyses the hydroxylation of 2-hydroxybiphenyl (2HBP) to 2,3-dihydroxybiphenyl (23DHBP). HbpA has been used extensively as a model for studying flavoprotein hydroxylases under process conditions, and has also been subjected to directed-evolution experiments that altered its catalytic properties. The structure of HbpA has been determined in its apo and FAD-complex forms to resolutions of 2.76 and 2.03 Å, respectively. Comparisons of the HbpA structure with those of homologues, in conjunction with a model of the reaction product in the active site, reveal His48 as the most likely acid/base residue to be involved in the hydroxylation mechanism. Mutation of His48 to Ala resulted in an inactive enzyme. The structures of HbpA also provide evidence that mutants achieved by directed evolution that altered activity are comparatively remote from the substrate-binding site.
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Affiliation(s)
- Chantel N Jensen
- York Structural Biology Laboratory, Department of Chemistry, University of York, Heslington, York, YO10 5DD (UK)
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12
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Jensen CN, Ali ST, Allen MJ, Grogan G. Exploring nicotinamide cofactor promiscuity in NAD(P)H-dependent flavin containing monooxygenases (FMOs) using natural variation within the phosphate binding loop. Structure and activity of FMOs from Cellvibrio sp. BR and Pseudomonas stutzeri NF13. ACTA ACUST UNITED AC 2014; 109:191-198. [PMID: 25383040 PMCID: PMC4220118 DOI: 10.1016/j.molcatb.2014.08.019] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2014] [Revised: 08/18/2014] [Accepted: 08/30/2014] [Indexed: 02/02/2023]
Abstract
Genes encoding ‘Type II FMOs’ CFMO and PSFMO were selected for diversity in the NADPH binding loop. CFMO and PSFMO were shown to both accept either NADH or NADPH as cofactor in the reduction of FAD. The activities with both NADPH and NADH have been evaluated in the oxidation of sulfide substrates. Structures of CFMO and PSFMO were solved, revealing the nature of the NADPH phosphate binding loop.
Flavin-containing monooxygenases (FMOs) catalyse asymmetric oxidation reactions that have potential for preparative organic synthesis, but most use the more expensive, phosphorylated nicotinamide cofactor NADPH to reduce FAD to FADH2 prior to formation of the (hydro)peroxy intermediate required for substrate oxygenation. A comparison of the structures of NADPH-dependent FMO from Methylophaga aminisulfidivorans (mFMO) and SMFMO from Stenotrophomonas maltophilia, which is able to use both NADPH and NADH, suggested that the promiscuity of the latter enzyme may be due in part to the substitution of an Arg–Thr couple in the NADPH phosphate recognition site in mFMO, for a Gln–His couple in SMFMO (Jensen et al., 2012, Chembiochem, 13, 872–878). Natural variation within the phosphate binding region, and its influence on nicotinamide cofactor promiscuity, was explored through the cloning, expression, characterisation and structural studies of FMOs from Cellvibrio sp. BR (CFMO) and Pseudomonas stutzeri NF13 (PSFMO), which possess Thr–Ser and Gln–Glu in the putative phosphate recognition positions, respectively. CFMO and PSFMO displayed 5- and 1.5-fold greater activity, respectively, than SMFMO for the reduction of FAD with NADH, and were also cofactor promiscuous, displaying a ratio of activity with NADH:NADPH of 1.7:1 and 1:1.3, respectively. The structures of CFMO and PSFMO revealed the context of the phosphate binding loop in each case, and also clarified the structure of the mobile helix–loop–helix motif that appears to shield the FAD-binding pocket from bulk solvent in this class of FMOs, a feature that was absent from the structure of SMFMO.
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Affiliation(s)
- Chantel N Jensen
- York Structural Biology Laboratory, Department of Chemistry, University of York, Heslington, York YO10 5DD, UK
| | - Sohail T Ali
- Plymouth Marine Laboratory, Prospect Place, Plymouth PL1 3DH, UK
| | - Michael J Allen
- Plymouth Marine Laboratory, Prospect Place, Plymouth PL1 3DH, UK
| | - Gideon Grogan
- York Structural Biology Laboratory, Department of Chemistry, University of York, Heslington, York YO10 5DD, UK
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13
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Zajkoska P, Rosenberg M, Heath R, Malone KJ, Stloukal R, Turner NJ, Rebroš M. Immobilised whole-cell recombinant monoamine oxidase biocatalysis. Appl Microbiol Biotechnol 2014; 99:1229-36. [DOI: 10.1007/s00253-014-5983-1] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2014] [Revised: 07/21/2014] [Accepted: 07/23/2014] [Indexed: 11/24/2022]
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14
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Man H, Loderer C, Ansorge-Schumacher MB, Grogan G. Structure of NADH-Dependent Carbonyl Reductase (CPCR2) from Candida parapsilosis
Provides Insight into Mutations that Improve Catalytic Properties. ChemCatChem 2014. [DOI: 10.1002/cctc.201300788] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Mutational Analysis of the C–C Bond Cleaving Enzyme Phloretin Hydrolase from Eubacterium ramulus. Top Catal 2013. [DOI: 10.1007/s11244-013-0196-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Structures of Alcohol Dehydrogenases from Ralstonia and Sphingobium spp. Reveal the Molecular Basis for Their Recognition of ‘Bulky–Bulky’ Ketones. Top Catal 2013. [DOI: 10.1007/s11244-013-0191-2] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Rodríguez-Mata M, Frank A, Wells E, Leipold F, Turner NJ, Hart S, Turkenburg JP, Grogan G. Structure and activity of NADPH-dependent reductase Q1EQE0 from Streptomyces kanamyceticus, which catalyses the R-selective reduction of an imine substrate. Chembiochem 2013; 14:1372-9. [PMID: 23813853 DOI: 10.1002/cbic.201300321] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2013] [Indexed: 11/11/2022]
Abstract
NADPH-dependent oxidoreductase Q1EQE0 from Streptomyces kanamyceticus catalyzes the asymmetric reduction of the prochiral monocyclic imine 2-methyl-1-pyrroline to the chiral amine (R)-2-methylpyrrolidine with >99% ee, and is thus of interest as a potential biocatalyst for the production of optically active amines. The structures of Q1EQE0 in native form, and in complex with the nicotinamide cofactor NADPH have been solved and refined to a resolution of 2.7 Å. Q1EQE0 functions as a dimer in which the monomer consists of an N-terminal Rossman-fold motif attached to a helical C-terminal domain through a helix of 28 amino acids. The dimer is formed through reciprocal domain sharing in which the C-terminal domains are swapped, with a substrate-binding cleft formed between the N-terminal subunit of monomer A and the C-terminal subunit of monomer B. The structure is related to those of known β-hydroxyacid dehydrogenases, except that the essential lysine, which serves as an acid/base in the (de)protonation of the nascent alcohol in those enzymes, is replaced by an aspartate residue, Asp187 in Q1EQE0. Mutation of Asp187 to either asparagine or alanine resulted in an inactive enzyme.
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Affiliation(s)
- María Rodríguez-Mata
- York Structural Biology Laboratory, Department of Chemistry, University of York, Heslington, York, YO10 5DD, UK
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Cloning, expression, characterisation and mutational analysis of l-aspartate oxidase from Pseudomonas putida. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.molcatb.2012.07.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Schückel J, Rylott EL, Grogan G, Bruce NC. A gene-fusion approach to enabling plant cytochromes p450 for biocatalysis. Chembiochem 2012; 13:2758-63. [PMID: 23129550 DOI: 10.1002/cbic.201200572] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2012] [Indexed: 11/08/2022]
Abstract
Cytochromes P450 from plants have the potential to be valuable catalysts for industrial hydroxylation reactions, but their application is hindered by poor solubility, the lack of suitable expression systems and the requirement of P450s for auxiliary redox-transport proteins for the delivery of reducing equivalents from NAD(P)H. In the interests of enabling useful P450 activity from plants, we have developed a suite of vectors for the expression of plant P450s as non-natural genetic fusions with reductase proteins. First, we have fused the P450 isoflavone synthase (IFS) from Glycine max with the bacterial P450 reductase domain (Rhf-RED) from Rhodococcus sp., by using our LICRED vector developed previously (F. Sabbadin, R. Hyde, A. Robin, E.-M. Hilgarth, M. Delenne, S. Flitsch, N. Turner, G. Grogan, N. C. Bruce, ChemBioChem 2010, 11, 987-994) creating the first active bacterial-plant fusion P450 enzyme. We have then created a complementary vector, ACRyLIC for the fusion of selected plant P450 enzymes to the P450 reductase ATR2 from Arabidopsis thaliana. The applicability of this vector to the creation of active P450 fusion enzymes was demonstrated using both IFS1 and the cinnamate-4-hydroxylase (C4H) from A. thaliana. Overall the fusion vector systems will allow the rapid creation of libraries of plant P450s with the aim of identifying enzyme activities with possible applications in industrial biocatalysis.
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Affiliation(s)
- Julia Schückel
- Centre for Novel Agricultural Products, Department of Biology, University of York, Heslington, UK
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Bruce H, Nguyen Tuan A, Mangas Sánchez J, Leese C, Hopwood J, Hyde R, Hart S, Turkenburg JP, Grogan G. Structures of a γ-aminobutyrate (GABA) transaminase from the s-triazine-degrading organism Arthrobacter aurescens TC1 in complex with PLP and with its external aldimine PLP-GABA adduct. Acta Crystallogr Sect F Struct Biol Cryst Commun 2012; 68:1175-80. [PMID: 23027742 PMCID: PMC3497974 DOI: 10.1107/s1744309112030023] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2012] [Accepted: 07/02/2012] [Indexed: 11/10/2022]
Abstract
Two complex structures of the γ-aminobutyrate (GABA) transaminase A1R958 from Arthrobacter aurescens TC1 are presented. The first, determined to a resolution of 2.80 Å, features the internal aldimine formed by reaction between the ℇ-amino group of Lys295 and the cofactor pyridoxal phosphate (PLP); the second, determined to a resolution of 2.75 Å, features the external aldimine adduct formed between PLP and GABA in the first half-reaction. This is the first structure of a microbial GABA transaminase in complex with its natural external aldimine and reveals the molecular determinants of GABA binding in this enzyme.
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Affiliation(s)
- Heather Bruce
- York Structural Biology Laboratory, Department of Chemistry, University of York, Heslington, York YO10 5DD, England
| | - Anh Nguyen Tuan
- York Structural Biology Laboratory, Department of Chemistry, University of York, Heslington, York YO10 5DD, England
| | - Juan Mangas Sánchez
- Química Orgánica e Inorgánica, Facultad de Química, Universidad de Oviedo, Julian Clavería 8, 33006 Oviedo, Spain
| | - Charlotte Leese
- York Structural Biology Laboratory, Department of Chemistry, University of York, Heslington, York YO10 5DD, England
| | - Jennifer Hopwood
- Manchester Interdisciplinary Biocentre, University of Manchester, 131 Princess Street, Manchester M1 7DN, England
| | - Ralph Hyde
- York Structural Biology Laboratory, Department of Chemistry, University of York, Heslington, York YO10 5DD, England
| | - Sam Hart
- York Structural Biology Laboratory, Department of Chemistry, University of York, Heslington, York YO10 5DD, England
| | - Johan P. Turkenburg
- York Structural Biology Laboratory, Department of Chemistry, University of York, Heslington, York YO10 5DD, England
| | - Gideon Grogan
- York Structural Biology Laboratory, Department of Chemistry, University of York, Heslington, York YO10 5DD, England
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Jensen CN, Cartwright J, Ward J, Hart S, Turkenburg JP, Ali ST, Allen MJ, Grogan G. A flavoprotein monooxygenase that catalyses a Baeyer-Villiger reaction and thioether oxidation using NADH as the nicotinamide cofactor. Chembiochem 2012; 13:872-8. [PMID: 22416037 DOI: 10.1002/cbic.201200006] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2012] [Indexed: 11/10/2022]
Abstract
A gene from the marine bacterium Stenotrophomonas maltophilia encodes a 38.6 kDa FAD-containing flavoprotein (Uniprot B2FLR2) named S. maltophilia flavin-containing monooxygenase (SMFMO), which catalyses the oxidation of thioethers and also the regioselective Baeyer-Villiger oxidation of the model substrate bicyclo[3.2.0]hept-2-en-6-one. The enzyme was unusual in its ability to employ either NADH or NADPH as nicotinamide cofactor. The K(M) and k(cat) values for NADH were 23.7±9.1 μM and 0.029 s(-1) and 27.3±5.3 μM and 0.022 s(-1) for NADPH. However, k(cat) /K(M) value for the ketone substrate in the presence of 100 μM cofactor was 17 times greater for NADH than for NADPH. SMFMO catalysed the quantitative conversion of 5 mM ketone in the presence of substoichiometric concentrations of NADH with the formate dehydrogenase cofactor recycling system, to give the 2-oxa and 3-oxa lactone products of Baeyer-Villiger reaction in a ratio of 5:1, albeit with poor enantioselectivity. The conversion with NADPH was 15 %. SMFMO also catalysed the NADH-dependent transformation of prochiral aromatic thioethers, giving in the best case, 80 % ee for the transformation of p-chlorophenyl methyl sulfide to its R enantiomer. The structure of SMFMO reveals that the relaxation in cofactor specificity appears to be accomplished by the substitution of an arginine residue, responsible for recognition of the 2'-phosphate on the NADPH ribose in related NADPH-dependent FMOs, with a glutamine residue in SMFMO. SMFMO is thus representative of a separate class of single-component, flavoprotein monooxygenases that catalyse NADH-dependent oxidations from which possible sequences and strategies for developing NADH-dependent biocatalysts for asymmetric oxygenation reactions might be identified.
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Affiliation(s)
- Chantel N Jensen
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, UK
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Frank A, Eborall W, Hyde R, Hart S, Turkenburg JP, Grogan G. Mutational analysis of phenolic acid decarboxylase from Bacillus subtilis (BsPAD), which converts bio-derived phenolic acids to styrene derivatives. Catal Sci Technol 2012. [DOI: 10.1039/c2cy20015e] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Foulkes JM, Malone KJ, Coker VS, Turner NJ, Lloyd JR. Engineering a Biometallic Whole Cell Catalyst for Enantioselective Deracemization Reactions. ACS Catal 2011. [DOI: 10.1021/cs200400t] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Joanne M. Foulkes
- Williamson Research Centre for Molecular Environmental Science and School of Earth, Atmospheric and Environmental Sciences, University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - Kirk J. Malone
- School of Chemistry, Manchester Interdisciplinary Biocentre, University of Manchester, 131 Princess Street, Manchester M1 7DN, U.K
| | - Victoria S. Coker
- Williamson Research Centre for Molecular Environmental Science and School of Earth, Atmospheric and Environmental Sciences, University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - Nicholas J. Turner
- School of Chemistry, Manchester Interdisciplinary Biocentre, University of Manchester, 131 Princess Street, Manchester M1 7DN, U.K
| | - Jonathan R. Lloyd
- Williamson Research Centre for Molecular Environmental Science and School of Earth, Atmospheric and Environmental Sciences, University of Manchester, Oxford Road, Manchester M13 9PL, U.K
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Affiliation(s)
- Nicholas J. Turner
- School of Chemistry, University of Manchester, Manchester Interdisciplinary Biocentre, 131 Princess Street, Manchester M1 7DN, U.K
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Effects of dissolved oxygen availability and culture biomass at induction upon the intracellular expression of monoamine oxidase by recombinant E. coli in fed batch bioprocesses. Process Biochem 2011. [DOI: 10.1016/j.procbio.2010.11.019] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Atkin KE, Reiss R, Koehler V, Bailey KR, Hart S, Turkenburg JP, Turner NJ, Brzozowski AM, Grogan G. The structure of monoamine oxidase from Aspergillus niger provides a molecular context for improvements in activity obtained by directed evolution. J Mol Biol 2008; 384:1218-31. [PMID: 18951902 DOI: 10.1016/j.jmb.2008.09.090] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2008] [Revised: 09/26/2008] [Accepted: 09/29/2008] [Indexed: 11/29/2022]
Abstract
Monoamine oxidase from Aspergillus niger (MAO-N) is a flavoenzyme that catalyses the oxidative deamination of primary amines. MAO-N has been used as the starting model for a series of directed evolution experiments, resulting in mutants of improved activity and broader substrate specificity, suitable for application in the preparative deracemisation of primary, secondary and tertiary amines when used as part of a chemoenzymatic oxidation-reduction cycle. The structures of a three-point mutant (Asn336Ser/Met348Lys/Ile246Met or MAO-N-D3) and a five-point mutant (Asn336Ser/Met348Lys/Ile246Met/Thr384Asn/Asp385Ser or MAO-N-D5) have been obtained using a multiple-wavelength anomalous diffraction experiment on a selenomethionine derivative of the truncated MAO-N-D5 enzyme. MAO-N exists as a homotetramer with a large channel at its centre and shares some structural features with human MAO B (MAO-B). A hydrophobic cavity extends from the protein surface to the active site, where a non-covalently bound flavin adenine dinucleotide (FAD) sits at the base of an 'aromatic cage,' the sides of which are formed by Trp430 and Phe466. A molecule of l-proline was observed near the FAD, and this ligand superimposed well with isatin, a reversible inhibitor of MAO-B, when the structures of MAO-N proline and MAO-B-isatin were overlaid. Of the mutations that confer the ability to catalyse the oxidation of secondary amines in MAO-N-D3, Asn336Ser reduces steric bulk behind Trp430 of the aromatic cage and Ile246Met confers greater flexibility within the substrate binding site. The two additional mutations, Thr384Asn and Asp385Ser, that occur in the MAO-N-D5 variant, which is able to oxidise tertiary amines, appear to influence the active-site environment remotely through changes in tertiary structure that perturb the side chain of Phe382, again altering the steric and electronic character of the active site near FAD. The possible implications of the change in steric and electronic environment caused by relevant mutations are discussed with respect to the improved catalytic efficiency of the MAO-N variants described in the literature.
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Affiliation(s)
- Kate E Atkin
- York Structural Biology Laboratory, Department of Chemistry, University of York, York YO10 5YW, UK
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