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Fan S, Wei X, Lü R, Feng C, Zhang Q, Lü X, Jin Y, Yan M, Yang Z. Roles of the N-terminal motif in improving the activity and soluble expression of phenylalanine ammonia lyases in Escherichia coli. Int J Biol Macromol 2024; 262:130248. [PMID: 38367782 DOI: 10.1016/j.ijbiomac.2024.130248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2023] [Revised: 02/08/2024] [Accepted: 02/14/2024] [Indexed: 02/19/2024]
Abstract
Phenylalanine ammonia-lyase (PAL) has various applications in fine chemical manufacturing and the pharmaceutical industry. In particular, PAL derived from Anabaena variabilis (AvPAL) is used as a therapeutic agent to the treat phenylketonuria in clinical settings. In this study, we aligned the amino acid sequences of AvPAL and PAL derived from Nostoc punctiforme (NpPAL) to obtain several mutants with enhanced activity, expression yield, and thermal stability via amino acid substitution and saturation mutagenesis at the N-terminal position. Enzyme kinetic experiments revealed that the kcat values of NpPAL-N2K, NpPAL-I3T, and NpPAL-T4L mutants were increased to 3.2-, 2.8-, and 3.3-fold that of the wild-type, respectively. Saturation mutagenesis of the fourth amino acid in AvPAL revealed that the kcat values of AvPAL-L4N, AvPAL-L4P, AvPAL-L4Q and AvPAL-L4S increased to 4.0-, 3.7-, 3.6-, and 3.2-fold, respectively. Additionally, the soluble protein yield of AvPAL-L4K increased to approximately 14 mg/L, which is approximately 3.5-fold that of AvPAL. Molecular dynamics studies further revealed that maintaining the attacking state of the reaction and N-terminal structure increased the rate of catalytic reaction and improved the solubility of proteins. These findings provide new insights for the rational design of PAL in the future.
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Affiliation(s)
- Shuai Fan
- NHC Key Laboratory of Biotechnology of Antibiotics, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, China
| | - Xiyu Wei
- NHC Key Laboratory of Biotechnology of Antibiotics, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, China
| | - Ruijie Lü
- School of Pharmacy, North China University of Science and Technology, Tangshan 063210, Hebei, China
| | - Cuiyue Feng
- School of Pharmacy, North China University of Science and Technology, Tangshan 063210, Hebei, China
| | - Qian Zhang
- NHC Key Laboratory of Biotechnology of Antibiotics, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, China
| | - Xudong Lü
- NHC Key Laboratory of Biotechnology of Antibiotics, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, China
| | - Yuanyuan Jin
- NHC Key Laboratory of Biotechnology of Antibiotics, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, China
| | - Maocai Yan
- School of Pharmacy, Jining Medical University, Rizhao 276800, Shandong, China.
| | - Zhaoyong Yang
- NHC Key Laboratory of Biotechnology of Antibiotics, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, China.
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Moisă ME, Amariei DA, Nagy EZA, Szarvas N, Toșa MI, Paizs C, Bencze LC. Fluorescent enzyme-coupled activity assay for phenylalanine ammonia-lyases. Sci Rep 2020; 10:18418. [PMID: 33116226 PMCID: PMC7595223 DOI: 10.1038/s41598-020-75474-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Accepted: 10/07/2020] [Indexed: 11/30/2022] Open
Abstract
Phenylalanine ammonia-lyases (PALs) catalyse the non-oxidative deamination of l-phenylalanine to trans-cinnamic acid, while in the presence of high ammonia concentration the reverse reaction occurs. PALs have been intensively studied, however, their industrial applications for amino acids synthesis remained limited, mainly due to their decreased operational stability or limited substrate specificity. The application of extensive directed evolution procedures to improve their stability, activity or selectivity, is hindered by the lack of reliable activity assays allowing facile screening of PAL-activity within large-sized mutant libraries. Herein, we describe the development of an enzyme-coupled fluorescent assay applicable for PAL-activity screens at whole cell level, involving decarboxylation of trans-cinnamic acid (the product of the PAL reaction) by ferulic acid decarboxylase (FDC1) and a photochemical reaction of the produced styrene with a diaryltetrazole, that generates a detectable, fluorescent pyrazoline product. The general applicability of the fluorescent assay for PALs of different origin, as well as its versatility for the detection of tyrosine ammonia-lyase (TAL) activity have been also demonstrated. Accordingly, the developed procedure provides a facile tool for the efficient activity screens of large mutant libraries of PALs in presence of non-natural substrates of interest, being essential for the substrate-specificity modifications/tailoring of PALs through directed evolution-based protein engineering.
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Affiliation(s)
- Mădălina E Moisă
- Biocatalysis and Biotransformations Research Center, Faculty of Chemistry and Chemical Engineering, Babeș-Bolyai University, Arany János Str. 11, 400028, Cluj-Napoca, Romania
| | - Diana A Amariei
- Biocatalysis and Biotransformations Research Center, Faculty of Chemistry and Chemical Engineering, Babeș-Bolyai University, Arany János Str. 11, 400028, Cluj-Napoca, Romania
| | - Emma Z A Nagy
- Biocatalysis and Biotransformations Research Center, Faculty of Chemistry and Chemical Engineering, Babeș-Bolyai University, Arany János Str. 11, 400028, Cluj-Napoca, Romania
| | - Nóra Szarvas
- Biocatalysis and Biotransformations Research Center, Faculty of Chemistry and Chemical Engineering, Babeș-Bolyai University, Arany János Str. 11, 400028, Cluj-Napoca, Romania
| | - Monica I Toșa
- Biocatalysis and Biotransformations Research Center, Faculty of Chemistry and Chemical Engineering, Babeș-Bolyai University, Arany János Str. 11, 400028, Cluj-Napoca, Romania
| | - Csaba Paizs
- Biocatalysis and Biotransformations Research Center, Faculty of Chemistry and Chemical Engineering, Babeș-Bolyai University, Arany János Str. 11, 400028, Cluj-Napoca, Romania
| | - László C Bencze
- Biocatalysis and Biotransformations Research Center, Faculty of Chemistry and Chemical Engineering, Babeș-Bolyai University, Arany János Str. 11, 400028, Cluj-Napoca, Romania.
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Biomedical applications of microbial phenylalanine ammonia lyase: Current status and future prospects. Biochimie 2020; 177:142-152. [PMID: 32828824 DOI: 10.1016/j.biochi.2020.08.009] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 08/01/2020] [Accepted: 08/18/2020] [Indexed: 12/18/2022]
Abstract
Phenylalanine ammonia lyase (PAL) has recently emerged as an important therapeutic enzyme with several biomedical applications. The enzyme catabolizes l-phenylalanine to trans-cinnamate and ammonia. PAL is widely distributed in higher plants, some algae, ferns, and microorganisms, but absent in animals. Although microbial PAL has been extensively exploited in the past for producing industrially important metabolites, its high substrate specificity and catalytic efficacy lately spurred interest in its biomedical applications. PEG-PAL drug named Palynziq™, isolated from Anabaena variabilis has been recently approved for the treatment of adult phenylketonuria (PKU) patients. Further, it has exhibited high potency in regressing tumors and treating tyrosine related metabolic abnormalities like tyrosinemia. Several therapeutically valuable metabolites have been biosynthesized via its catalytic action including dietary supplements, antimicrobial peptides, aspartame, amino-acids, and their derivatives. This review focuses on all the prospective biomedical applications of PAL. It also provides an overview of the structure, production parameters, and various strategies to improve the therapeutic potential of this enzyme. Engineered PAL with improved pharmacodynamic and pharmacokinetic properties will further establish this enzyme as a highly efficient biological drug.
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Rezaeian Marjani L, Imani M, Zarei Jaliani H. Enhancement of Pharmaceutical Urate Oxidase Thermostability by Rational Design of De Novo Disulfide Bridge. IRANIAN JOURNAL OF BIOTECHNOLOGY 2020; 18:e2662. [PMID: 33850949 PMCID: PMC8035418 DOI: 10.30498/ijb.2020.2662] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Background and Purpose As a therapeutic enzyme, urate oxidase is utilized in the reduction of uric acid in various conditions such as gout or tumor syndrome lysis. However, even bearing kinetical advantage over other counterparts, it suffers from structural instability most likely due to its subcellular and fungal origin. Objectives In this research, by using rational design and introduction of de novo disulfide bridge in urate oxidase structure, we designed and created a thermostable urate oxidase for the first time. Materials and Methods Utilizing site-directed mutagenesis and only with one point mutation we constructed two separate mutants: Ala6Cys and Ser282Cys which covalently linked subunits of enzyme each other. Single mutation to cysteine created three inter-chain disulfide bridges and one hydrogen bond in Ala6Cys and two disulfide bridges in Ser282Cys. Results Both mutants showed 10 °C increase in optimum activity compared to wild-type enzyme while the Km values for both increased by 50% and their specific activity compromised. The thermal stability of Ser282Cys increased remarkably by comparing Ala6Cys and wild-type enzymes. Estimation of half life for wild-type enzyme demonstrated 38.5 min, while for Ala6Cys and Ser282Cys were 138 and 115 min, respectively. Interestingly, the optimal pH of both mutants was broaden from 7 to 10, which could make them candidates for industrial applications. Conclusion It seemed that introducing disulfide bridges resulted in local and overall rigidity by bringing two adjacent sites of enzyme together and decreasing the conformational entropy of unfolding state is responsible for the enhancement of thermostability.
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Affiliation(s)
- Leila Rezaeian Marjani
- Department of Cellular and Molecular Biotechnology, Institute of Biotechnology, Urmia University, Urmia, Iran
| | - Mehdi Imani
- Department of Cellular and Molecular Biotechnology, Institute of Biotechnology, Urmia University, Urmia, Iran.,Department of Basic Sciences, Faculty of Veterinary Medicine, Urmia University, Urmia, Iran
| | - Hossein Zarei Jaliani
- Department of Medical Biotechnology, School of Medicine, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
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Forghani H, Jamshidi Makiani M, Zarei Jaliani H, Boustanshenas M, Zahraei SM. Recombinant Production of a Novel Fusion Protein: Listeriolysin O Fragment Fused to S1 Subunit of Pertussis Toxin. IRANIAN BIOMEDICAL JOURNAL 2020; 25:33-40. [PMID: 33129237 PMCID: PMC7748116 DOI: 10.29252/ibj.25.1.33] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Background: Some resources have suggested that genetically inactivated PTs bear a more protective effect than chemically inactivated products. This study aimed to produce new version of PT, by cloning an inactive PTS1 in a fusion form with N-terminal half of the LLO pore-forming toxin. Methods: Deposited pdb structure file of the PT was used to model an extra disulfide bond. Codon-optimized ORF of the PTS1 was used to make recombinant constructs of PTS1 and LLO-PTS1 in the pPSG-IBA35 vector. The recombinant PTS1 and LLO-PTS1 proteins were expressed in BL21 DE3 and SHuffle T7 strains of E. coli and purified by affinity chromatography. Cytotoxic effects of the recombinant proteins were examined in the MCF-7 cell line. Results: The purity of the products proved to be more than 85%, and the efficiency of the disulfide bond formation in SHuffle T7 strain was higher than BL21 DE3 strain. No cytotoxicity of the recombinant proteins was observed in MCF-7 cells. Soluble recombinant PTS1 and LLO-PTS1 proteins were produced in SHuffle T7 strain of E. coli with high efficiency of disulfide bonds formation. Conclusion: The LLO-PTS1 with corrected disulfide bonds was successfully expressed in E. coli SHuffleT7 strain. Due to the safety for human cells, this chimeric molecule can be an option to prevent pertussis disease if its immunostimulatory effects would be confirmed in the future.
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Affiliation(s)
- Hossein Forghani
- Antimicrobial Resistance Research Center, Institute of Immunology and Infectious Diseases, Iran University of Medical Sciences, Tehran, Iran.,Infectious and Tropical Diseases Research Center, Hormozgan Health Institute, Hormozgan University of Medical Sciences, Bandar Abbas, Iran
| | - Mahin Jamshidi Makiani
- Antimicrobial Resistance Research Center, Institute of Immunology and Infectious Diseases, Iran University of Medical Sciences, Tehran, Iran
| | - Hossein Zarei Jaliani
- Department of Medical Biotechnology, School of Medicine, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Mina Boustanshenas
- Antimicrobial Resistance Research Center, Institute of Immunology and Infectious Diseases, Iran University of Medical Sciences, Tehran, Iran
| | - Seyed Mohsen Zahraei
- Infectious Disease Center for Communicable Disease Control, Ministry of Health and Medical Education, Iran
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Weise NJ, Thapa P, Ahmed ST, Heath RS, Parmeggiani F, Turner NJ, Flitsch SL. Bi‐enzymatic Conversion of Cinnamic Acids to 2‐Arylethylamines. ChemCatChem 2020. [DOI: 10.1002/cctc.201902128] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Nicholas J. Weise
- Manchester Institute of Biotechnology (MIB), School of ChemistryThe University of Manchester 131 Princess Street M1 7DN Manchester United Kingdom
| | - Prasansa Thapa
- Manchester Institute of Biotechnology (MIB), School of ChemistryThe University of Manchester 131 Princess Street M1 7DN Manchester United Kingdom
| | - Syed T. Ahmed
- Manchester Institute of Biotechnology (MIB), School of ChemistryThe University of Manchester 131 Princess Street M1 7DN Manchester United Kingdom
| | - Rachel S. Heath
- Manchester Institute of Biotechnology (MIB), School of ChemistryThe University of Manchester 131 Princess Street M1 7DN Manchester United Kingdom
| | - Fabio Parmeggiani
- Manchester Institute of Biotechnology (MIB), School of ChemistryThe University of Manchester 131 Princess Street M1 7DN Manchester United Kingdom
| | - Nicholas J. Turner
- Manchester Institute of Biotechnology (MIB), School of ChemistryThe University of Manchester 131 Princess Street M1 7DN Manchester United Kingdom
| | - Sabine L. Flitsch
- Manchester Institute of Biotechnology (MIB), School of ChemistryThe University of Manchester 131 Princess Street M1 7DN Manchester United Kingdom
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Production and Purification of Therapeutic Enzymes. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1148:1-24. [DOI: 10.1007/978-981-13-7709-9_1] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Zhu L, Feng G, Ge F, Song P, Wang T, Liu Y, Tao Y, Zhou Z. One-Pot Enzymatic Synthesis of D-Arylalanines Using Phenylalanine Ammonia Lyase and L-Amino Acid Deaminase. Appl Biochem Biotechnol 2018; 187:75-89. [PMID: 29882193 DOI: 10.1007/s12010-018-2794-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Accepted: 05/23/2018] [Indexed: 11/27/2022]
Abstract
The phenylalanine ammonia-lyase (AvPAL) from Anabaena variabilis catalyzes the amination of substituent trans-cinnamic acid (t-CA) to produce racemic D,L-enantiomer arylalanine mixture owing to its low stereoselectivity. To produce high optically pure D-arylalanine, a modified AvPAL with high D-selectivity is expected. Based on the analyses of catalytic mechanism and structure, the Asn347 residue in the active site was proposed to control stereoselectivity. Therefore, Asn347 was mutated to construct mutant AvPAL-N347A, the stereoselectivity of AvPAL-N347A for D-enantiomer arylalanine was 2.3-fold higher than that of wild-type AvPAL (WtPAL). Furthermore, the residual L-enantiomer product in reaction solution could be converted into the D-enantiomer product through stereoselective oxidation by PmLAAD and nonselective reduction by reducing agent NH3BH3. At optimal conditions, the conversion rate of t-CA and optical purity (enantiomeric excess (eeD)) of D-phenylalanine reached 82% and exceeded 99%, respectively. The two enzymes displayed activity toward a broad range of substrate and could be used to efficiently synthesize D-arylalanine with different groups on the phenyl ring. Among these D-arylalanines, the yield of m-nitro-D-phenylalanine was highest and reached 96%, and the eeD exceeded 99%. This one-pot synthesis using AvPAL and PmLAAD has prospects for industrial application.
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Affiliation(s)
- Longbao Zhu
- School of Biochemical Engineering, Anhui Polytechnic University, 8 Zheshan Road, Wuhu, Anhui, 241000, People's Republic of China
| | - Guoqiang Feng
- School of Biochemical Engineering, Anhui Polytechnic University, 8 Zheshan Road, Wuhu, Anhui, 241000, People's Republic of China
| | - Fei Ge
- School of Biochemical Engineering, Anhui Polytechnic University, 8 Zheshan Road, Wuhu, Anhui, 241000, People's Republic of China
| | - Ping Song
- School of Biochemical Engineering, Anhui Polytechnic University, 8 Zheshan Road, Wuhu, Anhui, 241000, People's Republic of China
| | - Taotao Wang
- School of Biochemical Engineering, Anhui Polytechnic University, 8 Zheshan Road, Wuhu, Anhui, 241000, People's Republic of China
| | - Yi Liu
- Key Laboratory of Food and Biotechnology, School of Food and Biotechnology, Xihua University, Chengdu, 610039, China.
| | - Yugui Tao
- School of Biochemical Engineering, Anhui Polytechnic University, 8 Zheshan Road, Wuhu, Anhui, 241000, People's Republic of China
| | - Zhemin Zhou
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, People's Republic of China
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Parmeggiani F, Weise NJ, Ahmed ST, Turner NJ. Synthetic and Therapeutic Applications of Ammonia-lyases and Aminomutases. Chem Rev 2017; 118:73-118. [DOI: 10.1021/acs.chemrev.6b00824] [Citation(s) in RCA: 105] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Fabio Parmeggiani
- School of Chemistry, Manchester
Institute of Biotechnology, University of Manchester, 131 Princess
Street, M1 7DN, Manchester, United Kingdom
| | - Nicholas J. Weise
- School of Chemistry, Manchester
Institute of Biotechnology, University of Manchester, 131 Princess
Street, M1 7DN, Manchester, United Kingdom
| | - Syed T. Ahmed
- School of Chemistry, Manchester
Institute of Biotechnology, University of Manchester, 131 Princess
Street, M1 7DN, Manchester, United Kingdom
| | - Nicholas J. Turner
- School of Chemistry, Manchester
Institute of Biotechnology, University of Manchester, 131 Princess
Street, M1 7DN, Manchester, United Kingdom
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10
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Zhang F, Huang N, Zhou L, Cui W, Liu Z, Zhu L, Liu Y, Zhou Z. Modulating the pH Activity Profiles of Phenylalanine Ammonia Lyase from Anabaena variabilis by Modification of Center-Near Surface Residues. Appl Biochem Biotechnol 2017; 183:699-711. [DOI: 10.1007/s12010-017-2458-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Accepted: 03/12/2017] [Indexed: 10/19/2022]
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11
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Dehnavi E, Fathi-Roudsari M, Mirzaie S, Arab SS, Ranaei Siadat SO, Khajeh K. Engineering disulfide bonds in Selenomonas ruminantium β-xylosidase by experimental and computational methods. Int J Biol Macromol 2016; 95:248-255. [PMID: 27818293 DOI: 10.1016/j.ijbiomac.2016.10.104] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2016] [Revised: 08/22/2016] [Accepted: 10/25/2016] [Indexed: 11/28/2022]
Abstract
Homotetrameric β-xylosidase from Selenomonas ruminantium (SXA) is one of the most efficient enzymes known for the hydrolysis of cell wall hemicellulose. SXA shows a rapid rate of activity loss at temperatures above 50°C. In this study, we have introduced two inter-subunit disulfide bridges with one point mutation. Lys237 was chosen to be replaced with cysteine since it interacts with the same residue in the opposite subunit. While pH optimum, temperature profile and catalytic efficiency of the mutated variant were similar to the native enzyme, the mutated enzyme showed about 40% increase in thermal stability at 55°C. Our results showed that introduction of a single residue mutation in structure of SXA results in appearance of two disulfide bonds at dimer-dimer interface of the enzyme. Coarse-grained molecular dynamics (CG-MD) simulations also proved lower amounts of root mean square fluctuation (RMSF) for position 237 and potential energy for mutated SXA. Based these results, we suggest that choosing a correct residue for mutation in multi subunit proteins results in multiple site conversions which equals to several simultaneous mutations. Furthermore, CG-MD simulation in agreement with experimental methods showed higher thermostability of mutated SXA which proved applicability of this simulation for thermostability analysis.
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Affiliation(s)
- Ehsan Dehnavi
- Department of Biochemistry, Faculty of Biological Science, Tarbiat Modares University, Tehran, Iran
| | | | - Sako Mirzaie
- Department of Biochemistry, Sanandaj Branch, Islamic Azad University, Sanandaj, Iran
| | - Seyed Shahriar Arab
- Department of Biophysics, Faculty of Biological Science, Tarbiat Modares University, Tehran, Iran
| | - Seyed Omid Ranaei Siadat
- Protein Engineering Laboratory, Protein Research Center (PRC), Shahid Beheshti University, GC, Tehran, Iran; Nanobiotechnology Engineering Laboratory, Faculty of Engineering and New Technologies, Shahid Beheshti University, GC, Tehran, Iran.
| | - Khosro Khajeh
- Department of Biochemistry, Faculty of Biological Science, Tarbiat Modares University, Tehran, Iran.
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Zang Y, Jiang T, Cong Y, Zheng Z, Ouyang J. Molecular Characterization of a Recombinant Zea mays Phenylalanine Ammonia-Lyase (ZmPAL2) and Its Application in trans-Cinnamic Acid Production from L-Phenylalanine. Appl Biochem Biotechnol 2015; 176:924-37. [PMID: 25947617 DOI: 10.1007/s12010-015-1620-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2014] [Accepted: 04/06/2015] [Indexed: 10/23/2022]
Abstract
Phenylalanine ammonia-lyase (PAL) is one of the most extensively studied enzymes with its crucial role in secondary phenylpropanoid metabolism of plants. Recently, its demand has been increased for aromatic chemical production, but its applications in trans-cinnamic acid production were not much explored. In the present study, a putative PAL gene from Zea mays designated as ZmPAL2 was expressed and characterized in Escherichia coli BL21 (DE3). The recombinant ZmPAL2 exhibited a high PAL activity (7.14 U/mg) and a weak tyrosine ammonia-lyase activity. The optimal temperature of ZmPAL2 was 55 °C, and the thermal stability results showed that about 50 % of enzyme activity remained after a treatment at 60 °C for 6 h. The recombinant ZmPAL2 is a good candidate for the production of trans-cinnamic acid. The vitro conversion indicated that the recombinant ZmPAL2 could effectively catalyze the L-phenylalanine to trans-cinnamic acid, and the trans-cinnamic acid concentration can reach up to 5 g/l.
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Affiliation(s)
- Ying Zang
- College of Forestry, Nanjing Forestry University, Nanjing, 210037, People's Republic of China
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13
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Kong JQ. Phenylalanine ammonia-lyase, a key component used for phenylpropanoids production by metabolic engineering. RSC Adv 2015. [DOI: 10.1039/c5ra08196c] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Phenylalanine ammonia-lyase, a versatile enzyme with industrial and medical applications.
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Affiliation(s)
- Jian-Qiang Kong
- Institute of Materia Medica
- Chinese Academy of Medical Sciences & Peking Union Medical College
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines & Ministry of Health Key Laboratory of Biosynthesis of Natural Products
- Beijing
- China
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Zarei Jaliani H, Farajnia S, Safdari Y, Mohammadi SA, Barzegar A, Talebi S. Optimized condition for enhanced soluble-expression of recombinant mutant anabaena variabilis phenylalanine ammonia lyase. Adv Pharm Bull 2014; 4:261-6. [PMID: 24754010 DOI: 10.5681/apb.2014.038] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2013] [Revised: 01/18/2014] [Accepted: 01/20/2014] [Indexed: 11/17/2022] Open
Abstract
PURPOSE Recently discovered Anabaena variabilis phenylalanine ammonia lyase (AvPAL) proved to be a good candidate for enzyme replacement therapy of phenylketonuria. Outstanding stability properties of a mutant version of this enzyme, produced already in our laboratory, have led us to the idea of culture conditions optimization for soluble expression of this therapeutically valuable enzyme in E. coli. METHODS In the present study, the gene encoding mutant version of AvPAL was cloned into the pET28a expression vector. Different concentrations of IPTG, induction period, growth temperature, shaking speed, as well as different types of culture media were examined with respect to the amount of recombinant protein produced and specific activity of the enzyme. RESULTS Based upon our findings, maximum amount of active mutant enzyme was attained by addition of 0.5 mM IPTG at 150 rpm to the TB culture media. The yield of active enzyme at cluture tempreature of 25 °C and induction period of 18 hour was the highest. CONCLUSION The results of this study indicated that the yield of mutant AvPAL production in E. coli can be affected mainly by culture temperature and inducer concentration.
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Affiliation(s)
- Hossein Zarei Jaliani
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran. ; Department of Medical Biotechnology, Faculty of Advanced Medical Sciences /Students Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Safar Farajnia
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran. ; Biotechnology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Yaghoub Safdari
- Biotechnology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | | | - Abolfazl Barzegar
- Research Institute for Fundamental Sciences (RIFS), University of Tabriz, Tabriz, Iran
| | - Saeed Talebi
- Department of Antigen and Antibody Engineering Research, Monoclonal Antibody Research Center (MARC), Avicenna Research Institute (ARI), Tehran, Iran
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