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Mining of a novel esterase (est3S) gene from a cow rumen metagenomic library with organosphosphorus insecticides degrading capability: Catalytic insights by site directed mutations, docking, and molecular dynamic simulations. Int J Biol Macromol 2021; 190:441-455. [PMID: 34506858 DOI: 10.1016/j.ijbiomac.2021.08.224] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Revised: 08/29/2021] [Accepted: 08/31/2021] [Indexed: 11/22/2022]
Abstract
A novel esterase (est3S) gene, 1026 bp in size, was cloned from a metagenomic library made of uncultured microorganisms from the contents of cow rumen. The esterolytic enzyme (Est3S) is composed of 342 amino acids and shows the highest identity with EstGK1 (71.7%) and EstZ3 (63.78%) esterases from the uncultured bacterium. The Est3S did not cluster in any up-to-date classes (I to XVIII) of esterase and lipase. Est3S protein molecular weight was determined to be 38 kDa by gel electrophoresis and showed optimum activity at pH 7.0 and 40 °C and is partially resistant to organic solvents. Est3S activity was enhanced by K+, Na+, Mg2+, and Ca2+ and its highest activity was observed toward the short-chain p-nitrophenyl esters. Additionally, Est3S can degrade chlorpyrifos (CP) and methyl parathion (70% to 80%) in an hour. A mutated Est3S (Ser132-Ala132) did not show any activity toward CP and ester substrates. Notably, the GHS132QG motif is superimposed with the homolog esterase and cutinase-like esterase. Therefore, Ser132 is the critical amino acid like other esterases. The Est3S is relatively stable with ester compounds, and the methyl parathion complex was confirmed by molecular dynamics simulation. NOVELTY STATEMENT: A novel esterase gene (est3S) expressing esters and organophosphorus insecticide degradation traits was isolated from the uncultured bacterium in the contents of cow rumen. The Est3S protein did not cluster in any up-to-date classes (I to XVIII) of esterase/lipase proteins. Est3S was stable with the ligands up to 100 ns during the molecular dynamic simulations.
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Shaha CM, Pandit RS. Characterization of an Esterase Producing Bacterium from the Gut of Chironomus circumdatus (Bloodworms) and its Ability to Use Modified Phthalates. Curr Microbiol 2021; 78:3165-3172. [PMID: 34191052 DOI: 10.1007/s00284-021-02574-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2020] [Accepted: 06/15/2021] [Indexed: 10/21/2022]
Abstract
Insects harbor bacteria that are a rich source of enzymes that can be utilized for various industrial and biotechnological applications. It is predicted that during evolution these detoxifying enzymes have been acquired by insects through bacteria. However, the role of host insect detoxification enzymes has already been extensively studied but only a few resistance development studies have been focused on the enzymes derived from gut bacteria. Thus in this study, two bacterial isolates were found in the gut of Chironomous circumdatus larvae having esterase activity, out of which one bacterium was molecular characterized and it was found to be Enterobacter mori designated as strain BI1245. Further, crude extract from the bacterium was characterized and it was observed that it showed maximum activity at pH 8 and temperature 60 °C. Moreover, the crude extract showed 0.26 mM and 290 U/mg of protein as Km and Vmax value when p-nitrophenyl acetate was used as a substrate. Thereafter, the bacterial isolate was incubated in minimal salts medium containing modified phthalates and it was found that bacterium could utilize shorter alkyl-chain phthalic acid esters faster as compared to long alkyl chains thereby indicating that side chain of the substrates has a significant effect on the utilization of phthalic acid esters. Thus the gut flora present in insects may play an important role in providing resistance to the host to live in phthalate polluted water.
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Affiliation(s)
- Chaitali M Shaha
- Department of Zoology, Savitribai Phule Pune University, Ganeshkhind, Pune, 411007, India
| | - Radhakrishna S Pandit
- Department of Zoology, Savitribai Phule Pune University, Ganeshkhind, Pune, 411007, India.
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Öz Y, Sürmeli Y, Şanlı-Mohamed G. Enhanced thermostability of the immobilized thermoalkalophilic esterase onto magnetic-cornstarch nanoparticle. Biotechnol Appl Biochem 2021; 69:1418-1427. [PMID: 34151468 DOI: 10.1002/bab.2213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Accepted: 06/08/2021] [Indexed: 11/08/2022]
Abstract
The immobilization of the biocatalysts onto magnetic nanoparticles has been extensively applied as the external magnetic field facilitates the enzyme recovery from the reaction mixture. In the present study, glutaraldehyde-modified magnetite-cornstarch nanoparticles (MCNs) were successfully synthesized, elaborately characterized by ZetaSizer and surface-enhanced Raman spectroscopy, and used for the immobilization of a thermoalkalophilic esterase from Geobacillus sp. The optimal immobilization conditions were obtained at 65°C, 2:3 molar ratios of Fe2+ :Fe3+ , and 1 g cornstarch resulted in approximately 90 nm magnetic particles in size. Also, immobilization yield and immobilization efficiency of the esterase were found as 74% and 82%, respectively. Scanning electron microscopy micrographs showed that MCNs were uniform, spherical in shape, and well dispersed and esterase immobilized MCNs displayed similar morphology as free MCNs. The maximum activity of free and immobilized esterase was obtained at 65°C and pH 9. Immobilization onto glutaraldehyde-modified MCNs significantly enhanced the esterase thermostability. Additionally, the immobilized esterase kept its residual activity of 75% after three sequential cycles, suggesting that it has favorable operational stability.
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Affiliation(s)
- Yasin Öz
- Department of Chemistry, İzmir Institute of Technology, İzmir, Turkey
| | - Yusuf Sürmeli
- Department of Biotechnology and Bioengineering, İzmir Institute of Technology, İzmir, Turkey.,Department of Agricultural Biotechnology, Tekirdağ Namık Kemal University, Tekirdağ, Turkey
| | - Gülşah Şanlı-Mohamed
- Department of Chemistry, İzmir Institute of Technology, İzmir, Turkey.,Department of Biotechnology and Bioengineering, İzmir Institute of Technology, İzmir, Turkey
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4
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Optimisation of biodegradation conditions for waste canola oil by cold-adapted Rhodococcus sp. AQ5-07 from Antarctica. ELECTRON J BIOTECHN 2020. [DOI: 10.1016/j.ejbt.2020.07.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Wu D, Wang D, Hong J. Effect of a Novel Alpha/Beta Hydrolase Domain Protein on Tolerance of K. marxianus to Lignocellulosic Biomass Derived Inhibitors. Front Bioeng Biotechnol 2020; 8:844. [PMID: 32850717 PMCID: PMC7396682 DOI: 10.3389/fbioe.2020.00844] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Accepted: 06/30/2020] [Indexed: 01/12/2023] Open
Abstract
The multiple inhibitors tolerance of microorganism is important in bioconversion of lignocellulosic biomass which is a promising renewable and sustainable source for biofuels and other chemicals. The disruption of an unknown α/β hydrolase, which was termed KmYME and located in mitochondria in this study, resulted in the yeast more susceptible to lignocellulose-derived inhibitors, particularly to acetic acid, furfural and 5-HMF. The KmYME disrupted strain lost more mitochondrial membrane potential, showed increased plasma membrane permeability, severer redox ratio imbalance, and increased ROS accumulation, compared with those of the non-disrupted strain in the presence of the same inhibitors. The intracellular concentration of ATP, NAD and NADP in the KmYME disrupted strain was decreased. However, disruption of KmYME did not result in a significant change of gene expression at the transcriptional level. The KmYME possessed esterase/thioesterase activity which was necessary for the resistance to inhibitors. In addition, KmYME was also required for the resistance to other stresses including ethanol, temperature, and osmotic pressure. Disruption of two possible homologous genes in S. cerevisiae also reduced its tolerance to inhibitors.
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Affiliation(s)
- Dan Wu
- School of Life Sciences, University of Science and Technology of China, Hefei, China
| | - Dongmei Wang
- School of Life Sciences, University of Science and Technology of China, Hefei, China
- Hefei National Laboratory for Physical Sciences at the Microscale, Hefei, China
| | - Jiong Hong
- School of Life Sciences, University of Science and Technology of China, Hefei, China
- Hefei National Laboratory for Physical Sciences at the Microscale, Hefei, China
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6
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Islam SMA, Yeasmin S, Islam MS, Islam MS. Binding affinity and adhesion force of organophosphate hydrolase enzyme with soil particles related to the isoelectric point of the enzyme. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2017; 141:85-92. [PMID: 28319863 DOI: 10.1016/j.ecoenv.2017.03.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2016] [Revised: 02/07/2017] [Accepted: 03/07/2017] [Indexed: 06/06/2023]
Abstract
The binding affinity of organophosphate hydrolase enzyme (OphB) with soil particles in relation to the isoelectric point (pI) was studied. Immobilization of OphB with soil particles was observed by confocal microscopy, Fourier transform infrared spectroscopy (FT-IR), and Atomic force microscopy (AFM). The calculated pI of OphB enzyme was increased from 8.69 to 8.89, 9.04 and 9.16 by the single, double and triple mutant of OphB enzyme, respectively through the replacement of negatively charged aspartate with positively charged histidine. Practically, the binding affinity was increased to 5.30%, 11.50%, and 16.80% for single, double and triple mutants, respectively. In contrast, enzyme activity of OphB did not change by the mutation of the enzyme. On the other hand, adhesion forces were gradually increased for wild type OphB enzyme (90 pN) to 96, 100 and 104 pN for single, double and triple mutants of OphB enzyme, respectively. There was an increasing trend of binding affinity and adhesion force by the increase of isoelectric point (pI) of OphB enzyme.
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Affiliation(s)
- Shah Md Asraful Islam
- Department of Plant Pathology, Patuakhali Science and Technology University, Dumki, Patuakhali 8602, Bangladesh.
| | - Shabina Yeasmin
- Department of Forest Products, IALS, Gyeongsang National University, Jinju 660-701, Republic of Korea
| | - Md Saiful Islam
- Department of Soil Science, Patuakhali Science and Technology University, Dumki, Patuakhali 8602, Bangladesh
| | - Md Shariful Islam
- Department of Agricultural Chemistry, Patuakhali Science and Technology University, Dumki, Patuakhali 8602, Bangladesh
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Kuepethkaew S, Sangkharak K, Benjakul S, Klomklao S. Laundry detergent-stable lipase from Pacific white shrimp (Litopenaeus vannamei) hepatopancreas: Effect of extraction media and biochemical characterization. INTERNATIONAL JOURNAL OF FOOD PROPERTIES 2016. [DOI: 10.1080/10942912.2016.1180534] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Kaltsa A, Papaliaga D, Papaioannou E, Kotzekidou P. Characteristics of oleuropeinolytic strains of Lactobacillus plantarum group and influence on phenolic compounds in table olives elaborated under reduced salt conditions. Food Microbiol 2015; 48:58-62. [DOI: 10.1016/j.fm.2014.10.016] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2014] [Revised: 10/02/2014] [Accepted: 10/22/2014] [Indexed: 11/26/2022]
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9
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Dong XQ, Yang JS, Zhu N, Wang ET, Yuan HL. Sugarcane bagasse degradation and characterization of three white-rot fungi. BIORESOURCE TECHNOLOGY 2013; 131:443-51. [PMID: 23376835 DOI: 10.1016/j.biortech.2012.12.182] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2012] [Revised: 12/24/2012] [Accepted: 12/25/2012] [Indexed: 05/16/2023]
Abstract
In order to investigate the details of lignin biodegradation, the characteristics and process of sugarcane bagasse (SCB) degradation by three lignin degrading fungi, Phanerochaete chrysosporium PC2, Lentinula edode LE16 and Pleurotus ostreatus PO45, were studied. We found that the ligninolytic enzymes polyphenol oxidase (PPO) and manganese peroxidase (MnP) were produced first, and that the cellulolytic enzyme CMCase was produced subsequently. These three fungi were more efficient to degrade lignin (85-93%) than hemicelluloses (64-88%) and cellulose (15-67%) in 12weeks, in which P. chrysosporium PC2 was the most efficient strain to degrade all the ingredients. Results of the FTIR and CP/MAS (13)C NMR revealed that the three fungi preferentially degraded syringyl units. The PPO and MnP as the main ligninolytic enzymes, especially the presence of PPO, were new findings in this study, which improved our knowledge of biopretreatment of SCB and evidenced these strains as valuable resource for SCB biotransformation.
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Affiliation(s)
- Xiu Qin Dong
- State Key Lab of Agrobiotechnology, Center of Biomass Engineering, College of Biological Sciences, China Agricultural University, Beijing 100193, China
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Kretza E, Papaneophytou CP, Papi RM, Karidi K, Kiparissides C, Kyriakidis DA. Lipase activity in Thermus thermophilus HB8: Purification and characterization of the extracellular enzyme. BIOTECHNOL BIOPROC E 2012. [DOI: 10.1007/s12257-011-0481-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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11
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Immobilization of thermoalkalophilic recombinant esterase enzyme by entrapment in silicate coated Ca-alginate beads and its hydrolytic properties. Int J Biol Macromol 2012; 50:545-51. [DOI: 10.1016/j.ijbiomac.2012.01.017] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2011] [Revised: 01/11/2012] [Accepted: 01/12/2012] [Indexed: 11/20/2022]
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12
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Huang YC, Chen YF, Chen CY, Chen WL, Ciou YP, Liu WH, Yang CH. Production of ferulic acid from lignocellulolytic agricultural biomass by Thermobifida fusca thermostable esterase produced in Yarrowia lipolytica transformant. BIORESOURCE TECHNOLOGY 2011; 102:8117-8122. [PMID: 21683590 DOI: 10.1016/j.biortech.2011.05.062] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2011] [Revised: 05/20/2011] [Accepted: 05/22/2011] [Indexed: 05/30/2023]
Abstract
A gene (axe) encoding the AXE thermostable esterase in Thermobifida fusca NTU22 was cloned into a Yarrowia lipolytica P01g host strain. Recombinant expression resulted in extracellular esterase production at levels as high as 70.94 U/ml in Hinton flask culture broth, approximately 140 times higher than observed in a Pichia pastoris expression system. After 72 h of fermentation by the Y. lipolytica transformant in the fed-batch fermentor, the fermentation broth accumulated 41.11 U/ml esterase activity. Rice bran, wheat bran, bagasse and corncob were used as hydrolysis substrates for the esterase, with corncob giving the best ferulic acid yield. The corncob was incubated with T. fusca xylanase (Tfx) for 12h and then with the AXE esterase for an additional 12h. Ferulic acid accumulated to 396 μM in the culture broth, a higher concentration than with esterase alone or with Tfx and esterase together for 24 h.
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Affiliation(s)
- Yu-Chun Huang
- Department of Cosmetic Science, Providence University, Taichung 43301, Taiwan
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Molecular cloning, over expression and characterization of thermoalkalophilic esterases isolated from Geobacillus sp. Extremophiles 2010; 15:203-11. [PMID: 21181486 DOI: 10.1007/s00792-010-0344-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2010] [Accepted: 12/01/2010] [Indexed: 10/18/2022]
Abstract
Due to potential use for variety of biotechnological applications, genes encoding thermoalkalophilic esterase from three different Geobacillus strains isolated from thermal environmental samples in Balçova (Agamemnon) geothermal site were cloned and respective proteins were expressed in Escherichia coli (E.coli) and characterized in detail. Three esterases (Est1, Est2, Est3) were cloned directly by PCR amplification using consensus degenerate primers from genomic DNA of the strains Est1, Est2 and Est3 which were from mud, reinjection water and uncontrolled thermal leak, respectively. The genes contained an open reading frame (ORF) consisting of 741 bp for Est1 and Est2, which encoded 246 amino acids and ORF of Est3 was 729 bp encoded 242 amino acids. The esterase genes were expressed in E. coli and purified using His-Select HF nickel affinity gel. The molecular mass of the recombinant enzyme for each esterase was approximately 27.5 kDa. The three esterases showed high specific activity toward short chain p-NP esters. Recombinant Est1, Est2, Est3 have exhibited similar activity and the highest esterase activity of 1,100 U/mg with p-nitrophenyl acetate (pNPC(2)) as substrate was observed with Est1. All three esterase were most active around 65°C and pH 9.5-10.0. The effect of organic solvents, several metal ions, inhibitors and detergents on enzyme activity for purified Est1, Est2, Est3 were determined separately and compared.
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Constitutive expression of Thermobifida fusca thermostable Acetylxylan Esterase gene in Pichia pastoris. Int J Mol Sci 2010; 11:5143-51. [PMID: 21614198 PMCID: PMC3100850 DOI: 10.3390/ijms11125143] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2010] [Revised: 12/01/2010] [Accepted: 12/09/2010] [Indexed: 11/17/2022] Open
Abstract
A gene encoding the thermostable acetylxylan esterase (AXE) in Thermobifida fusca NTU22 was amplified by PCR, sequenced and cloned into the Pichia pastoris X-33 host strain using the vector pGAPZαA, allowing constitutive expression and secretion of the protein. Recombinant expression resulted in high levels of extracellular AXE production, as high as 526 U/mL in the Hinton flask culture broth. The purified enzyme showed a single band at about 28 kDa by SDS-polyacrylamide gel electrophoresis after being treated with endo-β-N-acetylglycosaminidase H; this agrees with the predicted size based on the nucleotide sequence. About 70% of the original activity remained after heat treatment at 60 °C for three hours. The optimal pH and temperature of the purified enzyme were 8.0 and 60 °C, respectively. The properties of the purified AXE from the P. pastoris transformant are similar to those of the AXE from an E. coli transformant.
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Heterologous expression of thermostable acetylxylan esterase gene from Thermobifida fusca and its synergistic action with xylanase for the production of xylooligosaccharides. Biochem Biophys Res Commun 2010; 400:718-23. [DOI: 10.1016/j.bbrc.2010.08.136] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2010] [Accepted: 08/29/2010] [Indexed: 10/19/2022]
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COLAK AHMET, CAMEDAN YASEMIN, FAIZ ÖZLEM, SESLI ERTUGRUL, KOLCUOĞLU YAKUP. AN ESTEROLYTIC ACTIVITY FROM A WILD EDIBLE MUSHROOM,LYCOPERDON PERLATUM. J Food Biochem 2009. [DOI: 10.1111/j.1745-4514.2009.00232.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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17
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Fuciños P, Domínguez A, Sanromán MA, Longo MA, Rúa ML, Pastrana L. Production of Thermostable Lipolytic Activity by Thermus Species. Biotechnol Prog 2008; 21:1198-205. [PMID: 16080702 DOI: 10.1021/bp050080g] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A quantitative screening for intra- and extracellular lipolytic activity was performed in submerged cultures of four Thermus strains using two different media (named T or D medium). Major differences in the extracellular lipolytic activity were observed in T medium, the highest values being for Thermus thermophilus HB27 and Thermus aquaticus YT1 strains (18 and 33 U/L, respectively). Two enzymes with lipase/esterase activity were identified in the four Thermus strains by zymogram analysis, with molecular weights of 34 and 62 kDa. No kinetic typification of the enzymes as primary metabolites was possible for any of the Thermus strains, because of the lack of a good fitting of the experimental lipolytic activity production rates to the Luedecking and Piret model. However, a linear relationship was found between the absolute values of biomass and total lipase/esterase activity (sum of intracellular and extracellular). For T. thermophilus HB27, an increase in the aeration rate caused the increase in the production of biomass and, particularly, intracellular lipolytic activity but the extracellular lipolytic activity was not affected except for the series with the strongest oxygen limitation. Transmission electronic microscopy revealed that T. thermophilus HB27 formed rotund bodies surrounded by a common membrane in cultures in the early stationary phase. The results suggest the occurrence of a specific mechanism of lipase/esterase secretion that might be due to the different composition and permeability of the cell membranes and those surrounding the rotund bodies.
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Affiliation(s)
- Pablo Fuciños
- Department of Biochemistry, Genetics and Immunology, University of Vigo, Campus of Ourense, As Lagoas 32004, Ourense, Spain
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Yang CH, Liu WH. Purification and properties of an acetylxylan esterase from Thermobifida fusca. Enzyme Microb Technol 2008; 42:181-6. [DOI: 10.1016/j.enzmictec.2007.09.007] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2007] [Revised: 08/30/2007] [Accepted: 09/05/2007] [Indexed: 10/22/2022]
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Faiz O, Colak A, Saglam N, Canakçi S, Beldüz AO. Determination and characterization of thermostable esterolytic activity from a novel thermophilic bacterium Anoxybacillus gonensis A4. BMB Rep 2007; 40:588-94. [PMID: 17669276 DOI: 10.5483/bmbrep.2007.40.4.588] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
A novel hot spring thermophile, Anoxybacillus gonensis A4 (A. gonensis A4) was investigated in terms of capability of tributyrin degradation and characterization of its thermostable esterase activity by the hydrolysis of p-nitrophenyl butyrate (PNPB). It was observed that A. gonensis A4 has an esterase with a molecular weight of 62 kDa. The extracellular crude preparation was characterized in terms of substrate specificity, pH and temperature optima and stability, kinetic parameters and inhibition/activation behaviour towards some chemicals and metal ions. Tributyrin agar assay showed that A. gonensis A4 secreted an esterase and V(max) and K(m) values of its activity were found to be 800 U/L and 176.5 microM, respectively in the presence of PNPB substrate. The optimum temperature and pH, for A. gonensis A4 esterase was 60-80 degrees C and 5.5, respectively. Although the enzyme activity was not significantly changed by incubating crude extract solution at 30-70 degrees C for 1 h, the enzyme activity was fully lost at 80 degrees C for same incubation period. The pH-stability profile showed that original crude esterase activity increased nearly 2-fold at pH 6.0. The effect of some chemicals on crude esterase activity indicated that A. gonensis A4 produce an esterase having serine residue in active site and -SH groups were essential for its activity.
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Affiliation(s)
- Ozlem Faiz
- Department of Chemistry, Karadeniz Technical University, 61080 Trabzon, Turkey
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Molecular cloning and characterization of thermostable esterase and lipase from Geobacillus thermoleovorans YN isolated from desert soil in Egypt. Process Biochem 2007. [DOI: 10.1016/j.procbio.2007.05.005] [Citation(s) in RCA: 80] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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21
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Yang CH, Yang SF, Liu WH. Production of xylooligosaccharides from xylans by extracellular xylanases from Thermobifida fusca. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2007; 55:3955-9. [PMID: 17432873 DOI: 10.1021/jf0635964] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Xylooligosaccharides are produced for use as a valuable food sweetener or additive. They have many beneficial biomedical and health effects. In this study, a process for producing xylooligosaccharides from lignocellulolytic agricultural waste was developed. Bagasse, corncob, wheat bran, and peanut shell were used as carbon sources for production of xylanolytic enzymes from Thermobifida fusca NTU22. When using bagasse as the carbon source, the xylanolytic enzymes that simultaneously accumulated in the broth in a 500 mL Hinton flask after 72 h of cultivation at 50 degrees C were measured as xylanase (14.0 U/mL), beta-xylosidase (74.1 mU/mL), and acetyl esterase (29.1 mU/mL). The optimum pH and temperature for xylanases were 6.0-8.0 and 70 degrees C, respectively. Six proteins with xylanase activity were identified by zymogram analysis of isoelectric focusing gel. This was followed by heat treatment at 70 degrees C for 30 min that eliminated 90% of the beta-xylosidase activity. The xylanase and acetyl esterase activities were still 100%. Two percent of xylan extracted from the bagasse was then hydrolyzed by heat-treated crude xylanase preparation at 60 degrees C, pH 7.0, for 10 h. The xylooligosaccharides that accumulated in the broth were about 23.7%. After the purification process by activated charcoal chromatography, the purity of xylooligosaccharides was 71.4%.
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Affiliation(s)
- Chao-Hsun Yang
- Institute of Microbiology and Biochemistry, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 106, Taiwan
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Sonesson AW, Brismar H, Callisen TH, Elofsson UM. Mobility of Thermomyces lanuginosus lipase on a trimyristin substrate surface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2007; 23:2706-13. [PMID: 17261037 DOI: 10.1021/la062003g] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
We have studied the mobility of active and inactive Thermomyces lanuginosus lipase (TLL) on a spin-coated trimyristin substrate surface using fluorescence recovery after photobleaching (FRAP) in a confocal microscopy setup. By photobleaching a circular spot of fluorescently labeled TLL adsorbed on a smooth trimyristin surface, both the diffusion coefficient D and the mobile fraction f could be quantified. FRAP was performed on surfaces with different surface density of lipase and as a function of time after adsorption. The data showed that the mobility of TLL was significantly higher on the trimyristin substrate surfaces compared to our previous studies on hydrophobic model surfaces. For both lipase variants, the diffusion decreased to similar rates at high relative surface density of lipase, suggesting that crowding effects are dominant with higher adsorbed amount of lipase. However, the diffusion coefficient at extrapolated infinite surface dilution, D0, was higher for the active TLL compared to the inactive (D0 = 17.9 x 10(-11) cm2/s vs D0 = 4.1 x 10(-11) cm2/s, data for the first time interval after adsorption). Moreover, the diffusion decreased with time after adsorption, most evident for the active TLL. We explain the results by product inhibition, i.e., that the accumulation of negatively charged fatty acid products decreased the diffusion rate of active lipases with time. This was supported by sequential adsorption experiments, where the adsorbed amount under flow conditions was studied as a function of time after adsorption. A second injection of lipase led to a significantly lower increase in adsorbed amount when the trimyristin surface was pretreated with active TLL compared to pretreatment of inactive TLL.
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Cloning, expression, partial characterization and structural modeling of a novel esterase from Pyrococcus furiosus. Enzyme Microb Technol 2006. [DOI: 10.1016/j.enzmictec.2006.02.021] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Ateşlier ZBB, Metin K. Production and partial characterization of a novel thermostable esterase from a thermophilic Bacillus sp. Enzyme Microb Technol 2006. [DOI: 10.1016/j.enzmictec.2005.07.015] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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25
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Choi YJ, Bourque D, Morel L, Groleau D, Míguez CB. Multicopy integration and expression of heterologous genes in Methylobacterium extorquens ATCC 55366. Appl Environ Microbiol 2006; 72:753-9. [PMID: 16391115 PMCID: PMC1352282 DOI: 10.1128/aem.72.1.753-759.2006] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2005] [Accepted: 09/22/2005] [Indexed: 11/20/2022] Open
Abstract
High-level expression of chromosomally integrated genes in Methylobacterium extorquens ATCC 55366 was achieved under the control of the strong M. extorquens AM1 methanol dehydrogenase promoter (PmxaF) using the mini-Tn7 transposon system. Stable maintenance and expression of the integrated genes were obtained in the absence of antibiotic selective pressure. Furthermore, using this technology, a multicopy integration protocol for M. extorquens was also developed. Chromosomal integration of one to five copies of the gene encoding the green fluorescent protein (gfp) was achieved. The multicopy-based expression system permitted expression of a preset number of gene copies. A unique specific Tn7 integration locus in the chromosome of M. extorquens, known as the Tn7 attachment site (attTn7 site), was identified. This single attTn7 site was identified in an intergenic region between glmS, which encodes the essential enzyme glucosamine-6-phosphate synthetase, and dhaT, which encodes 1,3-propanediol dehydrogenase. The fact that the integration event is site specific and the fact that the attTn7 site is a noncoding region of the chromosome make the mini-Tn7 transposon system very useful for insertion of target genes and subsequent expression. In all transformants tested, expression and segregation of the transforming gene were stable without generation of secondary mutations in the host. In this paper, we describe single and multicopy chromosome integration and stable expression of heterologous genes (bgl [beta-galactosidase], est [esterase], and gfp [green fluorescent protein]) in M. extorquens.
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Affiliation(s)
- Young J Choi
- Microbial and Enzymatic Technology Group, Bioprocess Platform, Biotechnology Research Institute, National Research Council of Canada, 6100 Royalmount Ave., Montreal, Quebec H4P 2R2, Canada
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Choi YJ, Miguez CB, Lee BH. Characterization and heterologous gene expression of a novel esterase from Lactobacillus casei CL96. Appl Environ Microbiol 2004; 70:3213-21. [PMID: 15184114 PMCID: PMC427766 DOI: 10.1128/aem.70.6.3213-3221.2004] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2003] [Accepted: 02/19/2004] [Indexed: 11/20/2022] Open
Abstract
A novel esterase gene (estI) of Lactobacillus casei CL96 was localized on a 3.3-kb BamHI DNA fragment containing an open reading frame (ORF) of 1,800 bp. The ORF of estI was isolated by PCR and expressed in Escherichia coli, the methylotrophic bacterium Methylobacterium extorquens, and the methylotrophic yeast Pichia pastoris under the control of T7, methanol dehydrogenase (P(mxaF)), and alcohol oxidase (AOX1) promoters, respectively. The amino acid sequence of EstI indicated that the esterase is a novel member of the GHSMG family of lipolytic enzymes and that the enzyme contains a lipase-like catalytic triad, consisting of Ser325, Asp516, and His558. E. coli BL21(DE3)/pLysS containing estI expressed a novel 67.5-kDa protein corresponding to EstI in an N-terminal fusion with the S. tag peptide. The recombinant L. casei CL96 EstI protein was purified to electrophoretic homogeneity in a one-step affinity chromatography procedure on S-protein agarose. The optimum pH and temperature of the purified enzyme were 7.0 and 37 degrees C, respectively. Among the pNP (p-nitrophenyl) esters tested, the most selective substrate was pNP-caprylate (C(8)), with K(m) and k(cat) values of 14 +/- 1.08 microM and 1,245 +/- 42.3 S(-1), respectively.
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Affiliation(s)
- Young J Choi
- Department of Food Science and Agricultural Chemistry, McGill University, Ste-Anne-de-Bellevue, Quebec, H9X 3V9, Canada
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Kim JY, Choi GS, Kim YJ, Ryu YW, Kim GJ. A new isolate Bacillus stearothermophilus JY144 expressing a novel esterase with high enantioselectivity to (R)-ketoprofen ethyl ester: strain selection and gene cloning. ACTA ACUST UNITED AC 2002. [DOI: 10.1016/s1381-1177(02)00078-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Screening, production and properties of a stereospecific esterase from Pseudomonas sp. S34 with high selectivity to (S)-ketoprofen ethyl ester. ACTA ACUST UNITED AC 2002. [DOI: 10.1016/s1381-1177(01)00077-7] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Sehgal AC, Callen W, Mathur EJ, Short JM, Kelly RM. Carboxylesterase from Sulfolobus solfataricus P1. Methods Enzymol 2001; 330:461-71. [PMID: 11210525 DOI: 10.1016/s0076-6879(01)30398-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Affiliation(s)
- A C Sehgal
- Department of Chemical Engineering, North Carolina State University, Raleigh, North Carolina 27606, USA
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Characterization of a new thermostable esterase from the moderate thermophilic bacterium Bacillus circulans. ACTA ACUST UNITED AC 2000. [DOI: 10.1016/s1381-1177(99)00111-3] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Alvarez-Macarie E, Baratti J. Short chain flavour ester synthesis by a new esterase from Bacillus licheniformis. ACTA ACUST UNITED AC 2000. [DOI: 10.1016/s1381-1177(99)00109-5] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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