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A New L-Proline Amide Hydrolase with Potential Application within the Amidase Process. CRYSTALS 2021. [DOI: 10.3390/cryst12010018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
L-proline amide hydrolase (PAH, EC 3.5.1.101) is a barely described enzyme belonging to the peptidase S33 family, and is highly similar to prolyl aminopeptidases (PAP, EC. 3.4.11.5). Besides being an S-stereoselective character towards piperidine-based carboxamides, this enzyme also hydrolyses different L-amino acid amides, turning it into a potential biocatalyst within the Amidase Process. In this work, we report the characterization of L-proline amide hydrolase from Pseudomonas syringae (PsyPAH) together with the first X-ray structure for this class of L-amino acid amidases. Recombinant PsyPAH showed optimal conditions at pH 7.0 and 35 °C, with an apparent thermal melting temperature of 46 °C. The enzyme behaved as a monomer at the optimal pH. The L-enantioselective hydrolytic activity towards different canonical and non-canonical amino-acid amides was confirmed. Structural analysis suggests key residues in the enzymatic activity.
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Wu Z, Liu C, Zhang Z, Zheng R, Zheng Y. Amidase as a versatile tool in amide-bond cleavage: From molecular features to biotechnological applications. Biotechnol Adv 2020; 43:107574. [PMID: 32512219 DOI: 10.1016/j.biotechadv.2020.107574] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Revised: 05/31/2020] [Accepted: 06/01/2020] [Indexed: 12/27/2022]
Abstract
Amidases (EC 3. 5. 1. X) are versatile biocatalysts for synthesis of chiral carboxylic acids, α-amino acids and amides due to their hydrolytic and acyl transfer activity towards the C-N linkages. They have been extensively exploited and studied during the past years for their high specific activity and excellent enantioselectivity involved in various biotechnological applications in pharmaceutical and agrochemical industries. Additionally, they have attracted considerable attentions in biodegradation and bioremediation owing to environmental pressures. Motivated by industrial demands, crystallographic investigations and catalytic mechanisms of amidases based on structural biology have witnessed a dramatic promotion in the last two decades. The protein structures showed that different types of amidases have their typical stuctural elements, such as the conserved AS domains in signature amidases and the typical architecture of metal-associated active sites in acetamidase/formamidase family amidases. This review provides an overview of recent research advances in various amidases, with a focus on their structural basis of phylogenetics, substrate specificities and catalytic mechanisms as well as their biotechnological applications. As more crystal structures of amidases are determined, the structure/function relationships of these enzymes will also be further elucidated, which will facilitate molecular engineering and design of amidases to meet industrial requirements.
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Affiliation(s)
- Zheming Wu
- Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou 310014, People's Republic of China; Engineering Research Center of Bioconversion and Biopurification of Ministry of Education, Zhejiang University of Technology, Hangzhou 310014, People's Republic of China; The National and Local Joint Engineering Research Center for Biomanufacturing of Chiral Chemicals, Zhejiang University of Technology, Hangzhou 310014, People's Republic of China
| | - Changfeng Liu
- Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou 310014, People's Republic of China; Engineering Research Center of Bioconversion and Biopurification of Ministry of Education, Zhejiang University of Technology, Hangzhou 310014, People's Republic of China; The National and Local Joint Engineering Research Center for Biomanufacturing of Chiral Chemicals, Zhejiang University of Technology, Hangzhou 310014, People's Republic of China
| | - Zhaoyu Zhang
- Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou 310014, People's Republic of China; Engineering Research Center of Bioconversion and Biopurification of Ministry of Education, Zhejiang University of Technology, Hangzhou 310014, People's Republic of China; The National and Local Joint Engineering Research Center for Biomanufacturing of Chiral Chemicals, Zhejiang University of Technology, Hangzhou 310014, People's Republic of China
| | - Renchao Zheng
- Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou 310014, People's Republic of China; Engineering Research Center of Bioconversion and Biopurification of Ministry of Education, Zhejiang University of Technology, Hangzhou 310014, People's Republic of China; The National and Local Joint Engineering Research Center for Biomanufacturing of Chiral Chemicals, Zhejiang University of Technology, Hangzhou 310014, People's Republic of China.
| | - Yuguo Zheng
- Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou 310014, People's Republic of China; Engineering Research Center of Bioconversion and Biopurification of Ministry of Education, Zhejiang University of Technology, Hangzhou 310014, People's Republic of China; The National and Local Joint Engineering Research Center for Biomanufacturing of Chiral Chemicals, Zhejiang University of Technology, Hangzhou 310014, People's Republic of China
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Conversion of phenylglycinonitrile by recombinant Escherichia coli cells synthesizing variants of the arylacetonitrilase from Pseudomonas fluorescens EBC191. Appl Microbiol Biotechnol 2019; 103:6737-6746. [PMID: 31222384 DOI: 10.1007/s00253-019-09957-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Revised: 05/06/2019] [Accepted: 05/29/2019] [Indexed: 10/26/2022]
Abstract
The conversion of phenylglycinonitrile (2-aminophenylacetonitrile) by Escherichia coli strains was studied, which recombinantly expressed the arylacetonitrilase (NitA) from Pseudomonas fluorescens EBC191 and different nitrilase variants with altered reaction specificities. The whole-cell catalysts which formed the wild-type nitrilase converted (R,S)-phenylglycinonitrile preferentially to (S)-phenylglycine with a low degree of enantioselectivity. A recombinant strain which formed a variant of NitA produced mainly (S)-phenylglycine amide from (R,S)-phenylglycinonitrile and a second variant showed an almost complete enantioconversion and produced (R)-phenylglycine and left (S)-phenylglycinonitrile. The microbial-produced (S)-phenylglycinonitrile was used to study the chemical racemisation of (S)-phenylglycinonitrile at alkaline pH values in order to establish a dynamic kinetic resolution of the substrate. Subsequently, the conversion of (R,S)-phenylglycinonitrile by the whole-cell catalysts was studied at a pH of 10.8 which allowed a sufficient racemisation rate of phenylglycinonitrile. Surprisingly, under these conditions, strongly increased amounts of (S)-phenylglycine were formed by the recombinant E. coli cells expressing the amide-forming nitrilase variant. The aminopeptidase PepA from E. coli was identified by the construction of a deletion mutant and subsequent complementation as responsible amidase activity, which converted (S)-phenylglycine amide to (S)-phenylglycine.
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Payoungkiattikun W, Okazaki S, Ina A, H-Kittikun A, Asano Y. Characterization of an α-amino-ɛ-caprolactam racemase with broad substrate specificity from Citreicella sp. SE45. J Ind Microbiol Biotechnol 2016; 44:677-685. [PMID: 27544766 DOI: 10.1007/s10295-016-1825-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2016] [Accepted: 07/30/2016] [Indexed: 11/30/2022]
Abstract
α-Amino-ε-caprolactam (ACL) racemizing activity was detected in a putative dialkylglycine decarboxylase (EC 4.1.1.64) from Citreicella sp. SE45. The encoding gene of the enzyme was cloned and transformed in Escherichia coli BL21 (DE3). The molecular mass of the enzyme was shown to be 47.4 kDa on SDS-polyacrylamide gel electrophoresis. The enzymatic properties including pH and thermal optimum and stabilities were determined. This enzyme acted on a broad range of amino acid amides, particularly unbranched amino acid amides including L-alanine amide and L-serine amide with a specific activity of 17.5 and 21.6 U/mg, respectively. The K m and V max values for D- and L-ACL were 5.3 and 2.17 mM, and 769 and 558 μmol/min.mg protein, respectively. Moreover, the turn over number (K cat) and catalytic efficiency (K cat/K m ) of purified ACL racemase from Citreicella sp. SE45 using L-ACL as a substrate were 465 S-1 and 214 S-1mM-1, respectively. The new ACL racemase from Citreicella sp. SE45 has a potential to be used as the biocatalytic application.
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Affiliation(s)
- Wisarut Payoungkiattikun
- Department of Industrial Biotechnology, Faculty of Agro-Industry, Prince of Songkla University, Hat-Yai, 90112, Thailand.,Department of Biotechnology and Biotechnology Research Center, Toyama Prefectural University, 5180 Kurokawa, Imizu, Toyama, 939-0398, Japan
| | - Seiji Okazaki
- Department of Biotechnology and Biotechnology Research Center, Toyama Prefectural University, 5180 Kurokawa, Imizu, Toyama, 939-0398, Japan.,Asano Active Enzyme Molecule Project, ERATO, JST, 5180 Kurokawa, Imizu, Toyama, 939-0398, Japan
| | - Atsutoshi Ina
- Department of Biotechnology and Biotechnology Research Center, Toyama Prefectural University, 5180 Kurokawa, Imizu, Toyama, 939-0398, Japan.,Asano Active Enzyme Molecule Project, ERATO, JST, 5180 Kurokawa, Imizu, Toyama, 939-0398, Japan
| | - Aran H-Kittikun
- Department of Industrial Biotechnology, Faculty of Agro-Industry, Prince of Songkla University, Hat-Yai, 90112, Thailand
| | - Yasuhisa Asano
- Department of Biotechnology and Biotechnology Research Center, Toyama Prefectural University, 5180 Kurokawa, Imizu, Toyama, 939-0398, Japan. .,Asano Active Enzyme Molecule Project, ERATO, JST, 5180 Kurokawa, Imizu, Toyama, 939-0398, Japan.
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Cerioli L, Planchestainer M, Cassidy J, Tessaro D, Paradisi F. Characterization of a novel amine transaminase from Halomonas elongata. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.molcatb.2015.07.009] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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6
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Mehta PK, Bhatia SK, Bhatia RK, Bhalla TC. Purification and characterization of a novel thermo-active amidase from Geobacillus subterraneus RL-2a. Extremophiles 2013; 17:637-48. [DOI: 10.1007/s00792-013-0547-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2013] [Accepted: 05/12/2013] [Indexed: 11/30/2022]
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7
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Purification Studies on a Thermo-active Amidase of Geobacillus pallidus BTP-5x MTCC 9225 Isolated from Thermal Springs of Tatapani (Himachal Pradesh). Appl Biochem Biotechnol 2012; 169:1-14. [DOI: 10.1007/s12010-012-9945-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2012] [Accepted: 10/10/2012] [Indexed: 12/01/2022]
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Zhang Z, Gao L, Zhao C, Qiu J. Nitrile- and amide-hydrolysing activity of acrylic acid-tolerant yeast Trichosporon asahii ZZB-1. ANN MICROBIOL 2011. [DOI: 10.1007/s13213-011-0298-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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9
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Product-induced gene expression, a product-responsive reporter assay used to screen metagenomic libraries for enzyme-encoding genes. Appl Environ Microbiol 2010; 76:7029-35. [PMID: 20833789 DOI: 10.1128/aem.00464-10] [Citation(s) in RCA: 99] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
A reporter assay-based screening method for enzymes, which we named product-induced gene expression (PIGEX), was developed and used to screen a metagenomic library for amidases. A benzoate-responsive transcriptional activator, BenR, was placed upstream of the gene encoding green fluorescent protein and used as a sensor. Escherichia coli sensor cells carrying the benR-gfp gene cassette fluoresced in response to benzoate concentrations as low as 10 μM but were completely unresponsive to the substrate benzamide. An E. coli metagenomic library consisting of 96,000 clones was grown in 96-well format in LB medium containing benzamide. The library cells were then cocultivated with sensor cells. Eleven amidase genes were recovered from 143 fluorescent wells; eight of these genes were homologous to known bacterial amidase genes while three were novel genes. In addition to their activity toward benzamide, the enzymes were active toward various substrates, including d- and l-amino acid amides, and displayed enantioselectivity. Thus, we demonstrated that PIGEX is an effective approach for screening novel enzymes based on product detection.
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Chen Y, Goldberg SL, Hanson RL, Parker WL, Gill I, Tully TP, Montana MA, Goswami A, Patel RN. Enzymatic Preparation of an (S)-Amino Acid from a Racemic Amino Acid. Org Process Res Dev 2010. [DOI: 10.1021/op1001534] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yijun Chen
- Process Research and Development, Bristol-Myers Squibb, One Squibb Drive, New Brunswick, New Jersey 08903, U.S.A
| | - Steven L. Goldberg
- Process Research and Development, Bristol-Myers Squibb, One Squibb Drive, New Brunswick, New Jersey 08903, U.S.A
| | - Ronald L. Hanson
- Process Research and Development, Bristol-Myers Squibb, One Squibb Drive, New Brunswick, New Jersey 08903, U.S.A
| | - William L. Parker
- Process Research and Development, Bristol-Myers Squibb, One Squibb Drive, New Brunswick, New Jersey 08903, U.S.A
| | - Iqbal Gill
- Process Research and Development, Bristol-Myers Squibb, One Squibb Drive, New Brunswick, New Jersey 08903, U.S.A
| | - Thomas P. Tully
- Process Research and Development, Bristol-Myers Squibb, One Squibb Drive, New Brunswick, New Jersey 08903, U.S.A
| | - Michael A. Montana
- Process Research and Development, Bristol-Myers Squibb, One Squibb Drive, New Brunswick, New Jersey 08903, U.S.A
| | - Animesh Goswami
- Process Research and Development, Bristol-Myers Squibb, One Squibb Drive, New Brunswick, New Jersey 08903, U.S.A
| | - Ramesh N. Patel
- Process Research and Development, Bristol-Myers Squibb, One Squibb Drive, New Brunswick, New Jersey 08903, U.S.A
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Franssen MCR, Kircher M, Wohlgemuth R. Industrial Biotechnology in the Chemical and Pharmaceutical Industries. Ind Biotechnol (New Rochelle N Y) 2010. [DOI: 10.1002/9783527630233.ch9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
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12
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Wang YS, Zheng RC, Xu JM, Liu ZQ, Cheng F, Feng ZH, Liu LL, Zheng YG, Shen YC. Enantioselective hydrolysis of (R)-2, 2-dimethylcyclopropane carboxamide by immobilized cells of an R-amidase-producing bacterium, Delftia tsuruhatensis CCTCC M 205114, on an alginate capsule carrier. J Ind Microbiol Biotechnol 2010; 37:503-10. [DOI: 10.1007/s10295-010-0696-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2009] [Accepted: 02/03/2010] [Indexed: 11/28/2022]
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13
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Flow injection analysis electrospray ionization mass spectrometry for high-throughput screening of a gene library for amidase activity. Anal Biochem 2009; 394:159-63. [DOI: 10.1016/j.ab.2009.07.018] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2009] [Revised: 07/13/2009] [Accepted: 07/13/2009] [Indexed: 11/24/2022]
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Komeda H, Hariyama N, Asano Y. l-Stereoselective amino acid amidase with broad substrate specificity from Brevundimonas diminuta: characterization of a new member of the leucine aminopeptidase family. Appl Microbiol Biotechnol 2006; 70:412-21. [PMID: 16001251 DOI: 10.1007/s00253-005-0068-9] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2005] [Revised: 06/17/2005] [Accepted: 06/19/2005] [Indexed: 11/30/2022]
Abstract
Brevundimonas diminuta TPU 5720 produces an amidase acting L-stereoselectively on phenylalaninamide. The enzyme (LaaA(Bd)) was purified to electrophoretic homogeneity by ammonium sulfate fractionation and four steps of column chromatography. The final preparation gave a single band on SDS-PAGE with a molecular weight of approximately 53,000. The native molecular weight of the enzyme was about 288,000 based on gel filtration chromatography, suggesting that the enzyme is active as a homohexamer. It had maximal activity at 50 degrees C and pH 7.5. LaaA(Bd) lost its activity almost completely on dialysis against potassium phosphate buffer (pH 7.0), and the amidase activity was largely restored by the addition of Co(2+) ions. The enzyme was, however, inactivated in the presence of ethylenediaminetetraacetic acid even in the presence of Co(2+), suggesting that LaaA(Bd) is a Co(2+)-dependent enzyme. LaaA(Bd) had hydrolyzing activity toward a broad range of L-amino acid amides including L-phenylalaninamide, L-glutaminamide, L-leucinamide, L-methioninamide, L-argininamide, and L-2-aminobutyric acid amide. Using information on the N-terminal amino acid sequence of the enzyme, the gene encoding LaaA(Bd) was cloned from the chromosomal DNA of the strain and sequenced. Analysis of 4,446 bp of the cloned DNA revealed the presence of seven open-reading frames (ORFs), one of which (laaA ( Bd )) encodes the amidase. LaaA(Bd) is composed of 491 amino acid residues (calculated molecular weight 51,127), and the deduced amino acid sequence exhibits significant similarity to that of ORFs encoding hypothetical cytosol aminopeptidases found in the genomes of Caulobacter crescentus, Bradyrhizobium japonicum, Rhodopseudomonas palustris, Mesorhizobium loti, and Agrobacterium tumefaciens, and leucine aminopeptidases, PepA, from Rickettsia prowazekii, Pseudomonas putida ATCC 12633, and Escherichia coli K-12. The laaA ( Bd ) gene modified in the nucleotide sequence upstream from its start codon was overexpressed in an E. coli transformant. The activity of the recombinant LaaA(Bd) in cell-free extracts of the E. coli transformant was 25.9 units mg(-1) with L-phenylalaninamide as substrate, which was 50 times higher than that of B. diminuta TPU 5720.
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Affiliation(s)
- Hidenobu Komeda
- Biotechnology Research Center, Toyama Prefectural University, Kosugi, Japan
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Antranikian G, Vorgias CE, Bertoldo C. Extreme environments as a resource for microorganisms and novel biocatalysts. ADVANCES IN BIOCHEMICAL ENGINEERING/BIOTECHNOLOGY 2005; 96:219-62. [PMID: 16566093 DOI: 10.1007/b135786] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
Abstract
The steady increase in the number of newly isolated extremophilic microorganisms and the discovery of their enzymes by academic and industrial institutions underlines the enormous potential of extremophiles for application in future biotechnological processes. Enzymes from extremophilic microorganisms offer versatile tools for sustainable developments in a variety of industrial application as they show important environmental benefits due to their biodegradability, specific stability under extreme conditions, improved use of raw materials and decreased amount of waste products. Although major advances have been made in the last decade, our knowledge of the physiology, metabolism, enzymology and genetics of this fascinating group of extremophilic microorganisms and their related enzymes is still limited. In-depth information on the molecular properties of the enzymes and their genes, however, has to be obtained to analyze the structure and function of proteins that are catalytically active around the boiling and freezing points of water and extremes of pH. New techniques, such as genomics, metanogenomics, DNA evolution and gene shuffling, will lead to the production of enzymes that are highly specific for countless industrial applications. Due to the unusual properties of enzymes from extremophiles, they are expected to optimize already existing processes or even develop new sustainable technologies.
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Affiliation(s)
- Garabed Antranikian
- Institute of Technical Microbiology, Technical University Hamburg-Harburg, Kasernenstrasse 12, 21073 Hamburg, Germany.
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Inoue A, Komeda H, Asano Y. Asymmetric Synthesis ofL-α-Methylcysteine with the Amidase fromXanthobacter flavus NR303. Adv Synth Catal 2005. [DOI: 10.1002/adsc.200505028] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Duchateau ALL, Hillemans-Crombach MG, van Duijnhoven A, Reiss R, Sonke T. A colorimetric method for determination of amino amidase activity. Anal Biochem 2004; 330:362-4. [PMID: 15203346 DOI: 10.1016/j.ab.2004.03.041] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2004] [Indexed: 10/26/2022]
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Komeda H, Harada H, Washika S, Sakamoto T, Ueda M, Asano Y. A novel R-stereoselective amidase from Pseudomonas sp. MCI3434 acting on piperazine-2-tert-butylcarboxamide. ACTA ACUST UNITED AC 2004; 271:1580-90. [PMID: 15066183 DOI: 10.1111/j.1432-1033.2004.04069.x] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A novel amidase acting on (R,S)-piperazine-2-tert-butylcarboxamide was purified from Pseudomonas sp. MCI3434 and characterized. The enzyme acted R-stereoselectively on (R,S)-piperazine-2-tert-butylcarboxamide to yield (R)-piperazine-2-carboxylic acid, and was tentatively named R-amidase. The N-terminal amino acid sequence of the enzyme showed high sequence identity with that deduced from a gene named PA3598 encoding a hypothetical hydrolase in Pseudomonas aeruginosa PAO1. The gene encoding R-amidase was cloned from the genomic DNA of Pseudomonas sp. MCI3434 and sequenced. Analysis of 1332 bp of the genomic DNA revealed the presence of one open reading frame (ramA) which encodes the R-amidase. This enzyme, RamA, is composed of 274 amino acid residues (molecular mass, 30 128 Da), and the deduced amino acid sequence exhibits homology to a carbon-nitrogen hydrolase protein (PP3846) from Pseudomonas putida strain KT2440 (72.6% identity) and PA3598 protein from P. aeruginosa strain PAO1 (65.6% identity) and may be classified into a new subfamily in the carbon-nitrogen hydrolase family consisting of aliphatic amidase, beta-ureidopropionase, carbamylase, nitrilase, and so on. The amount of R-amidase in the supernatant of the sonicated cell-free extract of an Escherichia coli transformant overexpressing the ramA gene was about 30 000 times higher than that of Pseudomonas sp. MCI3434. The intact cells of the E. coli transformant could be used for the R-stereoselective hydrolysis of racemic piperazine-2-tert-butylcarboxamide. The recombinant enzyme was purified to electrophoretic homogeneity from cell-free extract of the E. coli transformant overexpressing the ramA gene. On gel-filtration chromatography, the enzyme appeared to be a monomer. It had maximal activity at 45 degrees C and pH 8.0, and was completely inactivated in the presence of p-chloromercuribenzoate, N-ethylmaleimide, Mn2+, Co2+, Ni2+, Cu2+, Zn2+, Ag+, Cd2+, Hg2+, or Pb2+. RamA had hydrolyzing activity toward the carboxamide compounds, in which amino or imino group is connected to beta- or gamma-carbon, such as beta-alaninamide, (R)-piperazine-2-carboxamide (R)-piperidine-3-carboxamide, D-glutaminamide and (R)-piperazine-2-tert-butylcarboxamide. The enzyme, however, did not act on the other amide substrates for the aliphatic amidase despite its sequence similarity to RamA.
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Affiliation(s)
- Hidenobu Komeda
- Biotechnology Research Center, Toyama Prefectural University, 5180 Kurokawa, Kosugi, Toyama 939-0398, Japan
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Komeda H, Harada H, Washika S, Sakamoto T, Ueda M, Asano Y. S -Stereoselective piperazine-2-tert-butylcarboxamide hydrolase from Pseudomonas azotoformans IAM 1603 is a novel l-amino acid amidase. ACTA ACUST UNITED AC 2004; 271:1465-75. [PMID: 15066172 DOI: 10.1111/j.1432-1033.2004.04056.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
An amidase acting on (R,S)-piperazine-2-tert-butylcarboxamide was purified from Pseudomonas azotoformans IAM 1603 and characterized. The enzyme acted S-stereoselectively on (R,S)-piperazine-2-tert-butylcarboxamide to yield (S)-piperazine-2-carboxylic acid. N-terminal and internal amino acid sequences of the enzyme were determined. The gene encoding the S-stereoselective piperazine-2-tert-butylcarboxamide amidase was cloned from the chromosomal DNA of the strain and sequenced. Analysis of 2.1 kb of genomic DNA revealed the presence of two ORFs, one of which (laaA) encodes the amidase. This enzyme, LaaA is composed of 310 amino acid residues (molecular mass 34 514 Da), and the deduced amino acid sequence exhibits significant similarity to hypothetical and functionally characterized proline iminopeptidases from several bacteria. The laaA gene modified in the nucleotide sequence upstream from its start codon was overexpressed in Escherichia coli. The activity of the recombinant LaaA enzyme in cell-free extracts of E. coli was 13.1 units.mg(-1) with l-prolinamide as substrate. This enzyme was purified to electrophoretic homogeneity by ammonium sulfate fractionation and two column chromatography steps. On gel-filtration chromatography, the enzyme appeared to be a monomer with a molecular mass of 32 kDa. It had maximal activity at 45 degrees C and pH 9.0, and was completely inactivated in the presence of phenylhydrazine, Zn2+, Ag+, Cd2+ or Hg2+. LaaA had hydrolyzing activity toward L-amino acid amides such as L-prolinamide, L-proline-p-nitroanilide, L-alaninamide and L-methioninamide, but did not act on the peptide substrates for the proline iminopeptidases despite their sequence similarity to LaaA. The enzyme also acted S-stereoselectively on (R,S)-piperidine-2-carboxamide, (R,S)-piperazine-2-carboxamide and (R,S)-piperazine-2-tert-butylcarboxamide. Based on its specificity towards L-amino acid amides, the enzyme was named L-amino acid amidase. E. coli transformants overexpressing the laaA gene could be used for the S-stereoselective hydrolysis of (R,S)-piperazine-2-tert-butylcarboxamide.
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Affiliation(s)
- Hidenobu Komeda
- Biotechnology Research Center, Toyama Prefectural University, 5180 Kurokawa, Kosugi, Toyama 939-0398, Japan
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Guo L, Lin S, Dai D, Yang Y, Qi L, Wang M, Chen Y. Enantioseparation of α-Quaternary Amino Amides by Capillary Electrophoresis with Human Serum Albumin. ANAL LETT 2003. [DOI: 10.1081/al-120021099] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Trott S, Bürger S, Calaminus C, Stolz A. Cloning and heterologous expression of an enantioselective amidase from Rhodococcus erythropolis strain MP50. Appl Environ Microbiol 2002; 68:3279-86. [PMID: 12089004 PMCID: PMC126760 DOI: 10.1128/aem.68.7.3279-3286.2002] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The gene for an enantioselective amidase was cloned from Rhodococcus erythropolis MP50, which utilizes various aromatic nitriles via a nitrile hydratase/amidase system as nitrogen sources. The gene encoded a protein of 525 amino acids which corresponded to a protein with a molecular mass of 55.5 kDa. The deduced complete amino acid sequence showed homology to other enantioselective amidases from different bacterial genera. The nucleotide sequence approximately 2.5 kb upstream and downstream of the amidase gene was determined, but no indications for a structural coupling of the amidase gene with the genes for a nitrile hydratase were found. The amidase gene was carried by an approximately 40-kb circular plasmid in R. erythropolis MP50. The amidase was heterologously expressed in Escherichia coli and shown to hydrolyze 2-phenylpropionamide, alpha-chlorophenylacetamide, and alpha-methoxyphenylacetamide with high enantioselectivity; mandeloamide and 2-methyl-3-phenylpropionamide were also converted, but only with reduced enantioselectivity. The recombinant E. coli strain which synthesized the amidase gene was shown to grow with organic amides as nitrogen sources. A comparison of the amidase activities observed with whole cells or cell extracts of the recombinant E. coli strain suggested that the transport of the amides into the cells becomes the rate-limiting step for amide hydrolysis in recombinant E. coli strains.
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Affiliation(s)
- Sandra Trott
- Institut für Mikrobiologie, Universität Stuttgart, 70569 Stuttgart, Germany
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Highly efficient and enantioselective synthesis of l-arylglycines and d-arylglycine amides from biotransformations of nitriles. Tetrahedron Lett 2001. [DOI: 10.1016/s0040-4039(01)01439-3] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Patel RN, Banerjee A, Chu L, Brozozowski D, Nanduri V, Szarka LJ. Microbial synthesis of chiral intermediates for β-3-receptor agonists. J AM OIL CHEM SOC 1998. [DOI: 10.1007/s11746-998-0081-0] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ramesh N. Patel
- ; Department of Microbial Technology; Bristol-Myers Squibb Pharmaceutical Research Institute; P.O. Box 191 08903 New Brunswick NJ
| | - Amit Banerjee
- ; Department of Microbial Technology; Bristol-Myers Squibb Pharmaceutical Research Institute; P.O. Box 191 08903 New Brunswick NJ
| | - Linda Chu
- ; Department of Microbial Technology; Bristol-Myers Squibb Pharmaceutical Research Institute; P.O. Box 191 08903 New Brunswick NJ
| | - David Brozozowski
- ; Department of Microbial Technology; Bristol-Myers Squibb Pharmaceutical Research Institute; P.O. Box 191 08903 New Brunswick NJ
| | - Venkata Nanduri
- ; Department of Microbial Technology; Bristol-Myers Squibb Pharmaceutical Research Institute; P.O. Box 191 08903 New Brunswick NJ
| | - Laszlo J. Szarka
- ; Department of Microbial Technology; Bristol-Myers Squibb Pharmaceutical Research Institute; P.O. Box 191 08903 New Brunswick NJ
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Hirrlinger B, Stolz A, Knackmuss HJ. Purification and properties of an amidase from Rhodococcus erythropolis MP50 which enantioselectively hydrolyzes 2-arylpropionamides. J Bacteriol 1996; 178:3501-7. [PMID: 8655547 PMCID: PMC178119 DOI: 10.1128/jb.178.12.3501-3507.1996] [Citation(s) in RCA: 67] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
An enantioselective amidase from Rhodococcus erythropolis MP50 was purified to homogeneity. The enzyme has a molecular weight of about 480,000 and is composed of identical subunits with molecular weights of about 61,000. The NH2-terminal amino acid sequence was significantly different from previously published sequences of bacterial amidases. The purified amidase hydrolyzed a wide range of aliphatic and aromatic amides, The highest enzyme activities were found with amides carrying hydrophobic residues, such as pentyl or naphthoyl. The purified enzyme converted racemic 2-phenylpropionamide, naproxen amide [2-(6-methoxy-2-naphthyl) propionamide], and ketoprofen amide [2-(3'-benzoylphenyl)propionamide] to the corresponding S-acids with an enantiomeric excess of >99% and an almost 50% conversion of the racemic amides. The enzyme also hydrolyzed different alpha-amino amides but without significant enantioselectivity.
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Affiliation(s)
- B Hirrlinger
- Institüt fur Mikrobiologie, Universität Stuttgart, Germany
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