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Tian W, Zhang Z, Yang C, Li P, Xiao J, Wang R, Du P, Li N, Wang J. Engineering mesophilic GH11 xylanase from Cellulomonas flavigena by rational design of N-terminus substitution. Front Bioeng Biotechnol 2022; 10:1044291. [DOI: 10.3389/fbioe.2022.1044291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Accepted: 10/25/2022] [Indexed: 11/06/2022] Open
Abstract
Xylanase, a glycoside hydrolase, is widely used in the food, papermaking, and textile industries; however, most xylanases are inactive at high temperatures. In this study, a xylanase gene, CFXyl3, was cloned from Cellulomonas flavigena and expressed in Escherichia coli BL21 (DE3). To improve the thermostability of xylanase, four hybrid xylanases with enhanced thermostability (designated EcsXyl1–4) were engineered from CFXyl3, guided by primary and 3D structure analyses. The optimal temperature of CFXyl3 was improved by replacing its N-terminus with the corresponding area of SyXyn11P, a xylanase that belongs to the hyperthermostable GH11 family. The optimal temperatures of the hybrid xylanases EcsXyl1–4 were 60, 60, 65, and 85°C, respectively. The optimal temperature of EcsXyl4 was 30 C higher than that of CFXyl3 (55°C) and its melting temperature was 34.5°C higher than that of CFXyl3. After the hydrolysis of beechwood xylan, the main hydrolysates were xylotetraose, xylotriose, and xylobiose; thus, these hybrid xylanases could be applied to prebiotic xylooligosaccharide manufacturing.
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Bright Side of Fusarium oxysporum: Secondary Metabolites Bioactivities and Industrial Relevance in Biotechnology and Nanotechnology. J Fungi (Basel) 2021; 7:jof7110943. [PMID: 34829230 PMCID: PMC8625159 DOI: 10.3390/jof7110943] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 11/01/2021] [Accepted: 11/06/2021] [Indexed: 12/31/2022] Open
Abstract
Fungi have been assured to be one of the wealthiest pools of bio-metabolites with remarkable potential for discovering new drugs. The pathogenic fungi, Fusarium oxysporum affects many valuable trees and crops all over the world, producing wilt. This fungus is a source of different enzymes that have variable industrial and biotechnological applications. Additionally, it is widely employed for the synthesis of different types of metal nanoparticles with various biotechnological, pharmaceutical, industrial, and medicinal applications. Moreover, it possesses a mysterious capacity to produce a wide array of metabolites with a broad spectrum of bioactivities such as alkaloids, jasmonates, anthranilates, cyclic peptides, cyclic depsipeptides, xanthones, quinones, and terpenoids. Therefore, this review will cover the previously reported data on F. oxysporum, especially its metabolites and their bioactivities, as well as industrial relevance in biotechnology and nanotechnology in the period from 1967 to 2021. In this work, 180 metabolites have been listed and 203 references have been cited.
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Cai J, Chen XL, Fan JX, Huang XM, Li R, Sun XD, Li QQ, Li DY. Cloning and Heterologous Expression of a Novel Xylanase Gene TAX1 from Trichoderma atroviride and Its Application in the Deconstruction of Corn Stover. Appl Biochem Biotechnol 2021; 193:3029-3044. [PMID: 33970424 DOI: 10.1007/s12010-021-03582-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Accepted: 05/04/2021] [Indexed: 11/28/2022]
Abstract
Xylanase plays a vital role in the efficient utilization of xylan, which accounts for up to 30% of plant dry matter. However, the production cost of xylanase remains high, and the enzymatic characteristics of xylanases of most microorganisms are not suitable for industrial production. Therefore, it is of great significance to discover and develop new and efficient xylanases. In this study, the xylanase gene TAX1 (672 bp cDNA) was cloned from Trichoderma atroviride 3.3013 and expressed in Pichia pastoris. The TAX1 gene encoded a 223-amino acid protein (TAX1) with a molecular weight of 24.2 kDa which showed high similarity to glycoside hydrolase family 11. Enzyme activity assay verified that the recombinant xylanase TAX1 had optimal activity (215.3 IU/mL) at 50°C and pH 6.0. Stable working conditions were measured as pH 4.0-7.0 and 40-60°C. By adding Zn2+, the relative enzymatic activity of recombinant TAX1 was enhanced by 26%. The recombinant xylanase showed high activity toward birchwood xylan and corn stover. The Km and Kcat for xylan and corn stover were 0.36 mg/mL and 0.204 S-1 and 0.48 mg/mL and 0.149 S-1, respectively. The enzymatic activity of the TAX1 produced by P. pastoris was about 2.4-4 times higher that directly isolated from T. atroviride, so engineered P. pastoris for xylanase production could be an ideal candidate for industrial enzyme production.
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Affiliation(s)
- Jin Cai
- Heilongjiang Vocational College of Agricultural Technology, Jiamusi, 154007, People's Republic of China
| | - Xiu-Ling Chen
- Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Jin-Xia Fan
- Northeast Agricultural University, Harbin, 150030, People's Republic of China. .,The College of Engineering, Northeast Agricultural University, Harbin, 150030, People's Republic of China.
| | - Xiao-Mei Huang
- Heilongjiang Vocational College of Agricultural Technology, Jiamusi, 154007, People's Republic of China.
| | - Rui Li
- Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Xu-Dong Sun
- Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Qing-Qing Li
- Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Dong-Yu Li
- Northeast Agricultural University, Harbin, 150030, People's Republic of China
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Safitri E, Hanifah, Previta, Sudarko, Ni Nyoman Tri Puspaningsih, Istri Ratnadewi AA. Cloning, purification, and characterization of recombinant endo- β-1,4-D-xylanase of Bacillus sp. From soil termite abdomen. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2021. [DOI: 10.1016/j.bcab.2020.101877] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Novel Routes in Transformation of Lignocellulosic Biomass to Furan Platform Chemicals: From Pretreatment to Enzyme Catalysis. Catalysts 2020. [DOI: 10.3390/catal10070743] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
The constant depletion of fossil fuels along with the increasing need for novel materials, necessitate the development of alternative routes for polymer synthesis. Lignocellulosic biomass, the most abundant carbon source on the planet, can serve as a renewable starting material for the design of environmentally-friendly processes for the synthesis of polyesters, polyamides and other polymers with significant value. The present review provides an overview of the main processes that have been reported throughout the literature for the production of bio-based monomers from lignocellulose, focusing on physicochemical procedures and biocatalysis. An extensive description of all different stages for the production of furans is presented, starting from physicochemical pretreatment of biomass and biocatalytic decomposition to monomeric sugars, coupled with isomerization by enzymes prior to chemical dehydration by acid Lewis catalysts. A summary of all biotransformations of furans carried out by enzymes is also described, focusing on galactose, glyoxal and aryl-alcohol oxidases, monooxygenases and transaminases for the production of oxidized derivatives and amines. The increased interest in these products in polymer chemistry can lead to a redirection of biomass valorization from second generation biofuels to chemical synthesis, by creating novel pathways to produce bio-based polymers.
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Alokika, Singh B. Production, characteristics, and biotechnological applications of microbial xylanases. Appl Microbiol Biotechnol 2019; 103:8763-8784. [PMID: 31641815 DOI: 10.1007/s00253-019-10108-6] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Revised: 08/09/2019] [Accepted: 08/28/2019] [Indexed: 01/29/2023]
Abstract
Microbial xylanases have gathered great attention due to their biotechnological potential at industrial scale for many processes. A variety of lignocellulosic materials, such as sugarcane bagasse, rice straw, rice bran, wheat straw, wheat bran, corn cob, and ragi bran, are used for xylanase production which also solved the great issue of solid waste management. Both solid-state and submerged fermentation have been used for xylanase production controlled by various physical and nutritional parameters. Majority of xylanases have optimum pH in the range of 4.0-9.0 with optimum temperature at 30-60 °C. For biochemical, molecular studies and also for successful application in industries, purification and characterization of xylanase have been carried out using various appropriate techniques. Cloning and genetic engineering are used for commercial-level production of xylanase, to meet specific economic viability and industrial needs. Microbial xylanases are used in various biotechnological applications like biofuel production, pulp and paper industry, baking and brewing industry, food and feed industry, and deinking of waste paper. This review describes production, characteristics, and biotechnological applications of microbial xylanases.
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Affiliation(s)
- Alokika
- Laboratory of Bioprocess Technology, Department of Microbiology, Maharshi Dayanand University, Rohtak, Haryana, 124001, India
| | - Bijender Singh
- Laboratory of Bioprocess Technology, Department of Microbiology, Maharshi Dayanand University, Rohtak, Haryana, 124001, India. .,Department of Biotechnology, School of Interdisciplinary and Applied Life Sciences, Central University of Haryana, Jant-Pali, Mahendergarh, Haryana, 123031, India.
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Katsimpouras C, Dedes G, Bistis P, Kekos D, Kalogiannis KG, Topakas E. Acetone/water oxidation of corn stover for the production of bioethanol and prebiotic oligosaccharides. BIORESOURCE TECHNOLOGY 2018; 270:208-215. [PMID: 30218937 DOI: 10.1016/j.biortech.2018.09.018] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Revised: 09/01/2018] [Accepted: 09/03/2018] [Indexed: 06/08/2023]
Abstract
Ethanol production at high-gravity promise to achieve concentrations over the threshold for an economical distillation process and concurrently reduce water consumption. However, a persisting limitation is the poor mass transfer conditions resulting in low ethanol yields and concentrations. Hereby, the combination of an acetone/water oxidation pretreatment process (AWO) with a liquefaction/saccharification step, using a free-fall mixer, before simultaneous saccharification and fermentation (SSF) can realize ethanol concentrations of up to ca. 74 g/L at a solids content of 20 wt%. The free-fall mixer achieved a biomass slurry viscosity reduction by 87% after only 2 h of enzymatic saccharification, indicating the efficiency of the mixing system. Furthermore, the direct enzymatic treatment of AWO pretreated corn stover (CS) by a GH11 recombinant xylanase, led to the production of xylooligosaccharides (XOS) with prebiotic potential and the removal of insoluble fibers of hemicellulose improved the glucose release of AWOCS by 22%.
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Affiliation(s)
- Constantinos Katsimpouras
- Industrial Biotechnology & Biocatalysis Group, Biotechnology Laboratory, School of Chemical Engineering, National Technical University of Athens, 9 Iroon Polytechniou Str., Zografou Campus, Athens 15780, Greece
| | - Grigorios Dedes
- Industrial Biotechnology & Biocatalysis Group, Biotechnology Laboratory, School of Chemical Engineering, National Technical University of Athens, 9 Iroon Polytechniou Str., Zografou Campus, Athens 15780, Greece
| | - Perrakis Bistis
- Industrial Biotechnology & Biocatalysis Group, Biotechnology Laboratory, School of Chemical Engineering, National Technical University of Athens, 9 Iroon Polytechniou Str., Zografou Campus, Athens 15780, Greece
| | - Dimitrios Kekos
- Industrial Biotechnology & Biocatalysis Group, Biotechnology Laboratory, School of Chemical Engineering, National Technical University of Athens, 9 Iroon Polytechniou Str., Zografou Campus, Athens 15780, Greece
| | - Konstantinos G Kalogiannis
- Chemical Process and Energy Resources Institute (CPERI), CERTH, 6(th) km Harilaou-Thermi Road, 57001, Thermi, Thessaloniki, Greece
| | - Evangelos Topakas
- Industrial Biotechnology & Biocatalysis Group, Biotechnology Laboratory, School of Chemical Engineering, National Technical University of Athens, 9 Iroon Polytechniou Str., Zografou Campus, Athens 15780, Greece; Biochemical and Chemical Process Engineering, Division of Sustainable Process Engineering, Department of Civil, Environmental and Natural Resources Engineering, Luleå University of Technology, SE-97187 Luleå, Sweden.
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8
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Zhu Y, Liang X, Zhang H, Feng W, Liu Y, Zhang F, Linhardt RJ. A comparative secretome analysis of industrial Aspergillus oryzae and its spontaneous mutant ZJGS-LZ-21. Int J Food Microbiol 2017; 248:1-9. [PMID: 28237882 DOI: 10.1016/j.ijfoodmicro.2017.02.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2016] [Revised: 01/24/2017] [Accepted: 02/05/2017] [Indexed: 10/20/2022]
Abstract
Aspergillus oryzae koji plays a crucial role in fermented food products due to the hydrolytic activities of secreted enzymes. In the present study, we performed a comparative secretome analysis of the industrial strain of Aspergillus oryzae 3.042 and its spontaneous mutantZJGS-LZ-21. One hundred and fifty two (152) differential protein spots were excised (p<0.05), and 25 proteins were identified. Of the identified proteins, 91.3% belonged to hydrolytic enzymes acting on carbohydrates or proteins. Consistent with their enzyme activities, the expression of 14 proteins involved in the degradation of cellulose, hemicellulose, starch and proteins, increased in the ZJGS-LZ-21isolate. In particular, increased levels of acid protease (Pep) may favor the degradation of soy proteins in acidic environments and promote the cleavage of allergenic soybean proteins in fermentation, resulting in improvements of product safety and quality. The ZJGS-LZ-21 isolate showed higher protein secretion and increased hydrolytic activities than did strain 3.042, indicating its promising application in soybean paste fermentation.
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Affiliation(s)
- Yuanyuan Zhu
- Department of Biochemical Engineering, Zhejiang Gongshang University, Hangzhou 310025, China
| | - Xinle Liang
- Department of Biochemical Engineering, Zhejiang Gongshang University, Hangzhou 310025, China.
| | - Hong Zhang
- Department of Biochemical Engineering, Zhejiang Gongshang University, Hangzhou 310025, China
| | - Wei Feng
- Zhejiang Wuweihe Food Co. Ltd, Huzhou 313213, China
| | - Ye Liu
- Zhejiang Wuweihe Food Co. Ltd, Huzhou 313213, China
| | - Fuming Zhang
- Department of Chemical and Biological Engineering, Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, Troy, NY 12180, USA
| | - Robert J Linhardt
- Department of Chemical and Biological Engineering, Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, Troy, NY 12180, USA
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Hu D, Li J, Wu Q, Zang J, Cheng J, Wu M. Improved temperature characteristics of an Aspergillus oryzae GHF11 xylanase, by in silico design and site-directed mutagenesis. BIOTECHNOL BIOPROC E 2017. [DOI: 10.1007/s12257-016-0339-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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10
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Gómez S, Payne AM, Savko M, Fox GC, Shepard WE, Fernandez FJ, Cristina Vega M. Structural and functional characterization of a highly stable endo-β-1,4-xylanase from Fusarium oxysporum and its development as an efficient immobilized biocatalyst. BIOTECHNOLOGY FOR BIOFUELS 2016; 9:191. [PMID: 27602054 PMCID: PMC5011838 DOI: 10.1186/s13068-016-0605-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Accepted: 08/26/2016] [Indexed: 06/06/2023]
Abstract
BACKGROUND Replacing fossil fuel with renewable sources such as lignocellulosic biomass is currently a promising alternative for obtaining biofuel and for fighting against the consequences of climate change. However, the recalcitrant structure of lignocellulosic biomass residues constitutes a major limitation for its widespread use in industry. The efficient hydrolysis of lignocellulosic materials requires the complementary action of multiple enzymes including xylanases and β-xylosidases, which are responsible for cleaving exo- and endoxylan linkages, that release oligocarbohydrates that can be further processed by other enzymes. RESULTS We have identified the endo-β-1,4-xylanase Xyl2 from Fusarium oxysporum as a promising glycoside hydrolase family 11 enzyme for the industrial degradation of xylan. To characterize Xyl2, we have cloned the synthetic optimized gene and expressed and purified recombinant Xyl2 to homogeneity, finally obtaining 10 mg pure Xyl2 per liter of culture. The crystal structure of Xyl2 at 1.56 Å resolution and the structure of a methyl-xylopyranoside Xyl2 complex at 2.84 Å resolution cast a highly detailed view of the active site of the enzyme, revealing the molecular basis for the high catalytic efficiency of Xyl2. The kinetic analysis of Xyl2 demonstrates high xylanase activity and non-negligible β-xylosidase activity under a variety of experimental conditions including alkaline pH and elevated temperature. Immobilizing Xyl2 on a variety of solid supports enhances the enzymatic properties that render Xyl2 a promising industrial biocatalyst, which, together with the detailed structural data, may establish Xyl2 as a platform for future developments of industrially relevant xylanases. CONCLUSIONS F. oxysporum Xyl2 is a GH11 xylanase which is highly active in free form and immobilized onto a variety of solid supports in a wide pH range. Furthermore, immobilization of Xyl2 on certain supports significantly increases its thermal stability. A mechanistic rationale for Xyl2's remarkable catalytic efficiency at alkaline pH is proposed on the basis of two crystallographic structures. Together, these properties render Xyl2 an attractive biocatalyst for the sustainable industrial degradation of xylan.
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Affiliation(s)
- Sara Gómez
- Structural and Quantitative Biology Department, Center for Biological Research (CIB-CSIC), Ramiro de Maeztu 9, 28040 Madrid, Spain
| | - Asia M. Payne
- Structural and Quantitative Biology Department, Center for Biological Research (CIB-CSIC), Ramiro de Maeztu 9, 28040 Madrid, Spain
| | - Martin Savko
- Synchrotron SOLEIL, L’Orme des Merisieris Saint-Aubin BP48, 91192 Gif-sur-Yvette, France
| | - Gavin C. Fox
- Synchrotron SOLEIL, L’Orme des Merisieris Saint-Aubin BP48, 91192 Gif-sur-Yvette, France
| | - William E. Shepard
- Synchrotron SOLEIL, L’Orme des Merisieris Saint-Aubin BP48, 91192 Gif-sur-Yvette, France
| | - Francisco J. Fernandez
- Structural and Quantitative Biology Department, Center for Biological Research (CIB-CSIC), Ramiro de Maeztu 9, 28040 Madrid, Spain
- Department of Immunology, Complutense University School of Medicine, Madrid, Spain
- Abvance Biotech srl, Madrid, Spain
| | - M. Cristina Vega
- Structural and Quantitative Biology Department, Center for Biological Research (CIB-CSIC), Ramiro de Maeztu 9, 28040 Madrid, Spain
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Bioprocess for efficient production of recombinant Pichia anomala phytase and its applicability in dephytinizing chick feed and whole wheat flat Indian breads. ACTA ACUST UNITED AC 2015; 42:1389-400. [DOI: 10.1007/s10295-015-1670-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2015] [Accepted: 07/28/2015] [Indexed: 01/08/2023]
Abstract
Abstract
The phytase of the yeast Pichia anomala (PPHY) is a suitable biocatalyst as a food and feed additive because of its adequate thermostability, acid stability, protease insensitivity and broad substrate spectrum. The cell-bound nature and low phytase titres are the main bottlenecks for its utility in food and feed industries. In this investigation, we have overcome the problems by constitutive secretory expression of PPHY under glyceraldehyde phosphate dehydrogenase (GAP) promoter. A ~44-fold increase in rPPHY titre has been achieved after optimization of cultural variables by one-variable-at-a-time approach and two factorial statistical design. The use of GAP promoter makes the cultivation of the recombinant P. pastoris straight forward and eliminates the requirement of methanol for induction and hazards associated with its storage. Among metal-phytate complexes, Ca2+ phytate is hydrolyzed more efficiently by rPPHY than Co2+, Mn2+, Mg2+, Fe3+ and Zn2+ phytates. The enzyme is effective in dephytinizing whole wheat unleavened flat Indian breads (naan and tandoori) and different broiler feeds, thus mitigating anti-nutritional effects of phytates.
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Huang Y, Busk PK, Lange L. Cellulose and hemicellulose-degrading enzymes in Fusarium commune transcriptome and functional characterization of three identified xylanases. Enzyme Microb Technol 2015; 73-74:9-19. [DOI: 10.1016/j.enzmictec.2015.03.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2014] [Revised: 01/21/2015] [Accepted: 03/01/2015] [Indexed: 10/23/2022]
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Qian C, Liu N, Yan X, Wang Q, Zhou Z, Wang Q. Engineering a high-performance, metagenomic-derived novel xylanase with improved soluble protein yield and thermostability. Enzyme Microb Technol 2015; 70:35-41. [DOI: 10.1016/j.enzmictec.2014.11.005] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2014] [Revised: 11/03/2014] [Accepted: 11/21/2014] [Indexed: 11/29/2022]
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Expression and characterization of hyperthermotolerant xylanases, SyXyn11P and SyXyn11E, in Pichia pastoris and Escherichia coli. Appl Biochem Biotechnol 2014; 172:3476-87. [PMID: 24549804 DOI: 10.1007/s12010-014-0786-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2013] [Accepted: 02/06/2014] [Indexed: 01/01/2023]
Abstract
Both Syxyn11P and Syxyn11E, two codon-optimized genes encoding glycoside hydrolase (GH) family 11 hyperthermotolerant xylanases (designated SyXyn11P and SyXyn11E), were synthesized and inserted into pPIC9K(M) and pET-28a(+) vectors, respectively. The resulting recombinant expression vectors, pPIC9K(M)-Syxyn11P and pET-28a(+)-Syxyn11E, were transformed into Pichia pastoris GS115 and Escherichia coli BL21, respectively. The maximum activities of two recombinant xylanases (reSyXyn11P and reSyXyn11E) expressed in P. pastoris and E. coli reached 30.9 and 17.8 U/ml, respectively. The purified reSyXyn11P and reSyXyn11E displayed the same pH optimum at 6.5 and pH stability at a broad range of 4.5-9.0. The temperature optimum and stability of reSyXyn11P were 85 and 80 °C, higher than those of reSyXyn11E, respectively. Their activities were not significantly affected by metal ions tested and EDTA, but strongly inhibited by Mn(2+) and Ag(+). The K m and V max of reSyXyn11P toward birchwood xylan were 4.3 mg/ml and 694.6 U/mg, whose K m was close to that (4.8 mg/ml), but whose V max was much higher than that (205.6 U/mg) of reSyXyn11E. High-performance liquid chromatography analysis indicated that xylobiose and xylotriose as the major products were excised from insoluble corncob xylan by reSyXyn11P.
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Yin X, Li JF, Wang JQ, Tang CD, Wu MC. Enhanced thermostability of a mesophilic xylanase by N-terminal replacement designed by molecular dynamics simulation. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2013; 93:3016-23. [PMID: 23512640 DOI: 10.1002/jsfa.6134] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/25/2012] [Revised: 03/01/2013] [Accepted: 03/19/2013] [Indexed: 05/13/2023]
Abstract
BACKGROUND Xylanases have attracted much attention owing to their potential applications. The applicability of xylanases, however, was bottlenecked by their low stabilities at high temperature or extreme pH. The purpose of this work was to enhance the thermostability of a mesophilic xylanase by N-terminal replacement. RESULTS The thermostability of AoXyn11, a mesophilic family 11 xylanase from Aspergillus oryzae, was enhanced by replacing its N-terminal segment with the corresponding one of EvXyn11(TS) , a hyperthermotolerant family 11 xylanase. A hybrid xylanase with high thermostability, NhXyn11⁵⁷, was predicted by molecular dynamics (MD) simulation. An NhXyn11⁵⁷-encoding gene, Nhxyn11⁵⁷, was then constructed as designed theoretically, and overexpressed in Pichia pastoris. The temperature optimum of recombinant NhXyn11⁵⁷ (re-NhXyn11⁵⁷) was 75 °C, much higher than that of re-AoXyn11. Both xylanases were thermostable at 65 and 40 °C, respectively. Additionally, the pH optimum and stability of re-NhXyn11⁵⁷ were 5.5 and at a range of 4.0-8.5. Its activity was not significantly affected by metal ions tested and EDTA, but strongly inhibited by Mn²⁺ and Ag⁺. CONCLUSION This work obviously enhanced the thermostability of a mesophilic xylanase, making re-NhXyn11⁵⁷ a promising candidate for industrial processes. It also provided an effective technical strategy for improving thermostabilities of other mesophilic enzymes.
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Affiliation(s)
- Xin Yin
- School of Biotechnology and Key Laboratory of Carbohydrate Chemistry & Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China
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Fang W, Gao H, Cao Y, Shan A. Cloning and expression of a xylanase xynB from Aspergillus niger IA-001 in Pichia pastoris. J Basic Microbiol 2013; 54 Suppl 1:S190-9. [PMID: 23788000 DOI: 10.1002/jobm.201300078] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2013] [Accepted: 04/24/2013] [Indexed: 11/12/2022]
Abstract
The high-level expression of the xylanase GH11 gene from Aspergillus niger IA-001 called xynB was successfully completed in Pichia pastoris. The xynB gene encoding a mature xylanase of 225 amino acid was subcloned into the pPICZαA vector and was transformed into P. pastoris X-33 under the control of the alcohol oxidase I (AOX1) promoter. The xynB gene was ligated with a sequence encoding modified α-factor signal peptide (pPICZαmA) and the recombinant xylanase activity, which was measured 1280 U ml(-1), was 1.5-fold higher than when it was inserted into pPICZαA and was 19.39-fold greater than the native xylanase in the original strain. In a 10 L fermenter, the recombinant xylanase activity measured 10,035 U ml(-1) after 114 h. The SDS-PAGE analysis revealed that the purified xynB protein migrated as a single band with an apparent molecular weight of 24 kDa. The specific activity, using beechwood xylan as a substrate, was 1916 U mg(-1). The xylanase activity was optimal at pH 5.0 and at 50 °C. In addition, the xynB was active over a pH range of 2.2 to 10.0. The apparent Km and Vmax values were 4.429 mg ml(-1) and 1429 U mg(-1), respectively.
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Affiliation(s)
- Wei Fang
- Institute of Animal Nutrition, Northeast Agricultural University, Harbin, P. R., China
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Yin X, Gong YY, Wang JQ, Tang CD, Wu MC. Cloning and expression of a family 10 xylanase gene (Aoxyn10) from Aspergillus oryzae in Pichia pastoris. J GEN APPL MICROBIOL 2013; 59:405-15. [DOI: 10.2323/jgam.59.405] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Li JF, Gao SJ, Liu XT, Gong YY, Chen ZF, Wei XH, Zhang HM, Wu MC. Modified pPIC9K vector-mediated expression of a family 11 xylanase gene, Aoxyn11A, from Aspergillus oryzae in Pichia pastoris. ANN MICROBIOL 2012. [DOI: 10.1007/s13213-012-0568-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Yegin S, Fernandez-Lahore M. A Thermolabile Aspartic Proteinase from Mucor mucedo DSM 809: Gene Identification, Cloning, and Functional Expression in Pichia pastoris. Mol Biotechnol 2012; 54:661-72. [DOI: 10.1007/s12033-012-9608-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Wang JQ, Yin X, Wu MC, Zhang HM, Gao SJ, Wei JT, Tang CD, Li JF. Expression of a family 10 xylanase gene from Aspergillus usamii E001 in Pichia pastoris and characterization of the recombinant enzyme. J Ind Microbiol Biotechnol 2012; 40:75-83. [PMID: 23053346 DOI: 10.1007/s10295-012-1201-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2012] [Accepted: 09/18/2012] [Indexed: 12/29/2022]
Abstract
A cDNA gene (Auxyn10A), which encodes a mesophilic family 10 xylanase from Aspergillus usamii E001 (abbreviated to AuXyn10A), was amplified and inserted into the XhoI and NotI sites of pPIC9K(M) vector constructed from a parent pPIC9K. The recombinant expression vector, designated pPIC9K(M)-Auxyn10A, was transformed into Pichia pastoris GS115. All P. pastoris transformants were spread on a MD plate, and then inoculated on geneticin G418-containing YPD plates for screening multiple copies of integration of the Auxyn10A. One transformant expressing the highest recombinant AuXyn10A (reAuXyn10A) activity of 368.6 U/ml, numbered as P. pastoris GSX10A4-14, was selected by flask expression test. SDS-PAGE assay demonstrated that the reAuXyn10A was extracellularly expressed with an apparent M.W. of 39.8 kDa. The purified reAuXyn10A displayed the maximum activity at pH 5.5 and 50 °C. It was highly stable at a broad pH range of 4.5-8.5, and at a temperature of 45 °C. Its activity was not significantly affected by EDTA and several metal ions except Mn(2+), which caused a strong inhibition. The K(m) and V(max), towards birchwood xylan at pH 5.5 and 50 °C, were 2.25 mg/ml and 6,267 U/mg, respectively. TLC analysis verified that the AuXyn10A is an endo-β-1,4-D-xylanase, which yielded a major product of xylotriose and a small amount of xylose, xylotetraose, and xylopentose from birchwood xylan, but no xylobiose.
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Affiliation(s)
- Jun-Qing Wang
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, Jiangsu, People's Republic of China
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Dimarogona M, Topakas E, Christakopoulos P, Chrysina ED. The structure of a GH10 xylanase fromFusarium oxysporumreveals the presence of an extended loop on top of the catalytic cleft. ACTA CRYSTALLOGRAPHICA SECTION D: BIOLOGICAL CRYSTALLOGRAPHY 2012; 68:735-42. [DOI: 10.1107/s0907444912007044] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2011] [Accepted: 02/16/2012] [Indexed: 11/10/2022]
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Cloning and Expression of a Novel Xylanase Gene (Auxyn11D) from Aspergillus usamii E001 in Pichia pastoris. Appl Biochem Biotechnol 2012; 167:2198-211. [DOI: 10.1007/s12010-012-9757-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2012] [Accepted: 05/29/2012] [Indexed: 10/28/2022]
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