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Zhang B, Ni L, Tang X, Chen X, Hu B. Engineering the β-Oxidation Pathway in Yarrowia lipolytica for the Production of trans-10, cis-12-Conjugated Linoleic Acid. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:8377-8384. [PMID: 35763312 DOI: 10.1021/acs.jafc.2c02242] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
trans-10, cis-12-Conjugated linoleic acid (t10, c12-CLA) is an octadecadienoic acid with various biological benefits. Previously, linoleic acid isomerase from Propionibacterium acnes (PAI) was overexpressed in Yarrowia lipolytica (Y. lipolytica) to produce t10, c12-CLA. However, the t10, c12-CLA yield was restricted by the peroxisomal β-oxidation pathway. In this study, to minimize the degradation of t10, c12-CLA, four genetically modified strains of Y. lipolytica (Δpox2-oPAI, Δpox3-oPAI, Δpox2Δpox3-oPAI, and Δpex10-oPAI) were constructed and compared in terms of production stability and yield of t10, c12-CLA using safflower seed oil as substrates. The Δpex10-oPAI strain exhibited the best results, as revealed by the reduction of the t10, c12-CLA degradation rate from 58.5 to 18.6 mg/L/h. Additionally, the YLUpex10mP recombinant strain bearing six copies of oPAI combined with PEX10 deletion enhanced t10, c12-CLA production to 7.4 g/L and exhibited a CLA degradation rate of 19.7 mg/L/h, a 78% decrease from that of the control strain. Finally, in a bioreactor containing low-cost volatile fatty acids as partial carbon sources, the t10, c12-CLA content in the YLUpex10mP strain increased to 9.7 g/L, 1.3 times higher than in flasks. To our knowledge, this is the highest t10, c12-CLA yield through microbial synthesis reported to date.
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Affiliation(s)
| | - Lijuan Ni
- School of Chemical Engineering, Xuzhou College of Industrial Technology, No. 1 Xiangwang Road, Xuzhou, Jiangsu 221140, P. R. China
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Ma L, Jiang H, Li W, Qin H, Lv Z, Huang J, Hou X, Wang W. Biochemical properties of a native β-1,4-mannanase from Aspergillus aculeatus QH1 and partial characterization of its N-glycosylation. Biochem Biophys Rep 2021; 26:100922. [PMID: 33644418 PMCID: PMC7887645 DOI: 10.1016/j.bbrep.2021.100922] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 12/21/2020] [Accepted: 01/11/2021] [Indexed: 11/26/2022] Open
Abstract
N-glycosylation plays critical roles in protein secretion, sorting, stability, activity modulation, and interactions to other molecules in the eukaryotic organisms. Fungal β-1,4-mannanases have been widely used in the agri-food industry and contribute to the pathogenesis on plants. However, the information on N-glycosylation of a specific fungal carbohydrate-active enzyme (CAZyme) is currently limited. Herein, a cDNA was cloned from Aspergillus aculeatus QH1, displaying a full length of 1302 bp with an open reading frame of 1134 bp encoding for a GH5 subfamily 7 β-1, 4-mannanase, namely AacMan5_7A. The enzyme was purified and exhibited an optimal activity at pH 4.6 and 60 °C, hydrolyzing glucomannan and galactomannan, but not yeast mannan. AacMan5_7A is an N-glycosylated protein decorated with a high-mannose type glycan. Further through UPLC-ESI-MS/MS analysis, one of the four predicted N-glycosylation sites at N255 position was experimentally verified. The present study expands the information of N-glycosylation in fungal CAZymes, providing scientific bases for enhancing the production of fungal enzymes and their applications in food, feed, and plant biomass conversions. A cDNA was cloned from Aspergillus aculeatus QH1 for a GH5 subfamily 7 β-1, 4-mannanase, namely AacMan5_7A. AacMan5_7A was characterized for its general enzyme properties. AacMan5_7A is an N-glycosylated protein decorated with a high-mannose type glycan. One of the four predicted N-glycosylation sites at N255 position was experimentally verified.
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Affiliation(s)
- Liqing Ma
- College of Life Sciences, South China Agricultural University, Guangzhou, 510642, China
| | - Heping Jiang
- College of Life Sciences, South China Agricultural University, Guangzhou, 510642, China
| | - Weihua Li
- National Center of Biomedical Analysis, Beijing, 100850, China
| | - Hua Qin
- Department of Restorative Dentistry, School of Dentistry, Oregon Health & Science University (OHSU), Portland, OR, 97239, USA
| | - Zhi Lv
- College of Life Sciences, South China Agricultural University, Guangzhou, 510642, China
| | - Jiujiu Huang
- College of Life Sciences, South China Agricultural University, Guangzhou, 510642, China
| | - Xuewen Hou
- College of Life Sciences, South China Agricultural University, Guangzhou, 510642, China
| | - Weijun Wang
- College of Life Sciences, South China Agricultural University, Guangzhou, 510642, China.,Department of Animal Biosciences, University of Guelph, Guelph, Ontario, N1G 2W1, Canada
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Efficient expression of novel glutamate decarboxylases and high level production of γ-aminobutyric acid catalyzed by engineered Escherichia coli. Int J Biol Macromol 2020; 160:372-379. [DOI: 10.1016/j.ijbiomac.2020.05.195] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 05/20/2020] [Accepted: 05/22/2020] [Indexed: 11/20/2022]
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Lv Y, Gu Y, Xu J, Zhou J, Xu P. Coupling metabolic addiction with negative autoregulation to improve strain stability and pathway yield. Metab Eng 2020; 61:79-88. [PMID: 32445959 PMCID: PMC7510839 DOI: 10.1016/j.ymben.2020.05.005] [Citation(s) in RCA: 58] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Accepted: 05/14/2020] [Indexed: 11/23/2022]
Abstract
Metabolic addiction, an organism that is metabolically addicted with a compound to maintain its growth fitness, is an underexplored area in metabolic engineering. Microbes with heavily engineered pathways or genetic circuits tend to experience metabolic burden leading to degenerated or abortive production phenotype during long-term cultivation or scale-up. A promising solution to combat metabolic instability is to tie up the end-product with an intermediary metabolite that is essential to the growth of the producing host. Here we present a simple strategy to improve both metabolic stability and pathway yield by coupling chemical addiction with negative autoregulatory genetic circuits. Naringenin and lipids compete for the same precursor malonyl-CoA with inversed pathway yield in oleaginous yeast. Negative autoregulation of the lipogenic pathways, enabled by CRISPRi and fatty acid-inducible promoters, repartitions malonyl-CoA to favor flavonoid synthesis and increased naringenin production by 74.8%. With flavonoid-sensing transcriptional activator FdeR and yeast hybrid promoters to control leucine synthesis and cell grwoth fitness, this amino acid feedforward metabolic circuit confers a flavonoid addiction phenotype that selectively enrich the naringenin-producing pupulation in the leucine auxotrophic yeast. The engineered yeast persisted 90.9% of naringenin titer up to 324 generations. Cells without flavonoid addiction regained growth fitness but lost 94.5% of the naringenin titer after cell passage beyond 300 generations. Metabolic addiction and negative autoregulation may be generalized as basic tools to eliminate metabolic heterogeneity, improve strain stability and pathway yield in long-term and large-scale bioproduction.
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Affiliation(s)
- Yongkun Lv
- Department of Chemical, Biochemical and Environmental Engineering, University of Maryland Baltimore County, Baltimore, MD, 21250, USA; School of Chemical Engineering, Zhengzhou University, Zhengzhou, Henan, 450001, China; National Engineering Laboratory for Cereal Fermentation Technology, Jiangnan University, Wuxi, Jiangsu, 214122, China
| | - Yang Gu
- Department of Chemical, Biochemical and Environmental Engineering, University of Maryland Baltimore County, Baltimore, MD, 21250, USA; National Engineering Laboratory for Cereal Fermentation Technology, Jiangnan University, Wuxi, Jiangsu, 214122, China
| | - Jingliang Xu
- School of Chemical Engineering, Zhengzhou University, Zhengzhou, Henan, 450001, China.
| | - Jingwen Zhou
- National Engineering Laboratory for Cereal Fermentation Technology, Jiangnan University, Wuxi, Jiangsu, 214122, China.
| | - Peng Xu
- Department of Chemical, Biochemical and Environmental Engineering, University of Maryland Baltimore County, Baltimore, MD, 21250, USA.
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Tarutina MG, Lazareva MN, Semenko EI, Sineoky SP. Expression of Aspergillus aculeatus β-Mannanase in Pichia pastoris Yeast and Analysis of Industrially Important Enzyme Properties. APPL BIOCHEM MICRO+ 2019. [DOI: 10.1134/s0003683819090084] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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6
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Ouephanit C, Boonvitthya N, Theerachat M, Bozonnet S, Chulalaksananukul W. Efficient expression and secretion of endo-1,4-β-xylanase from Penicillium citrinum in non-conventional yeast Yarrowia lipolytica directed by the native and the preproLIP2 signal peptides. Protein Expr Purif 2019; 160:1-6. [PMID: 30923012 DOI: 10.1016/j.pep.2019.03.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2018] [Revised: 03/22/2019] [Accepted: 03/22/2019] [Indexed: 11/29/2022]
Abstract
Filamentous fungi are the most common industrial xylanase producers. In this study, the xynA gene encoding xylanase A of Penicilium citrinum was successfully synthesized and expressed in Yarrowia lipolytica under the control of the strong constitutive TEF promoter. Native and preproLIP2 secretion signals were used for comparison of the expression and secretion level. The recombinant xylanase was produced as a soluble protein, and the total activity production reached 11 and 52 times higher than the level of activity produced by the fungus P. citrinum native strain, respectively. Maximum activity was observed with the preproLIP2 secretion signal at 180 U/mL. Post translational glycosylation affected the molecular mass of the recombinant xylanase, resulting in an apparent molecular weight larger than 60 kDa, whereas after deglycosylation, the recombinant XynA displayed a molecular mass of 20 kDa. The deglycosylated xylanase was purified by ion exchange chromatography and reached 185-fold of purification. The enzyme was optimally active at 55 °C and pH 5 and stable over a broad pH range (3-9). It retained more than 80% of the original activity after 24 h. It conserved around 80% of the original activity after pre-incubation at 40 °C for 6 h. With birchwood xylan as substrate, the enzyme showed a Km of 5.2 mg/mL, and kcat of 245 per s. The high level of secretion and the stability over a wide range of pH and at moderate temperatures of the re-XynA could be useful for variety of biotechnological applications.
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Affiliation(s)
- Chanika Ouephanit
- Program in Biotechnology, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand; Department of Botany, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand; Biofuels by Biocatalysts Research Unit, Department of Botany, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand
| | | | - Monnat Theerachat
- Biofuels by Biocatalysts Research Unit, Department of Botany, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Sophie Bozonnet
- LISBP, Université de Toulouse, CNRS, INRA, INSA, Toulouse, 31077, France
| | - Warawut Chulalaksananukul
- Department of Botany, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand; Biofuels by Biocatalysts Research Unit, Department of Botany, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand.
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Vandermies M, Fickers P. Bioreactor-Scale Strategies for the Production of Recombinant Protein in the Yeast Yarrowia lipolytica. Microorganisms 2019; 7:E40. [PMID: 30704141 PMCID: PMC6406515 DOI: 10.3390/microorganisms7020040] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2019] [Revised: 01/28/2019] [Accepted: 01/29/2019] [Indexed: 01/02/2023] Open
Abstract
Recombinant protein production represents a multibillion-dollar market. Therefore, it constitutes an important research field both in academia and industry. The use of yeast as a cell factory presents several advantages such as ease of genetic manipulation, growth at high cell density, and the possibility of post-translational modifications. Yarrowia lipolytica is considered as one of the most attractive hosts due to its ability to metabolize raw substrate, to express genes at a high level, and to secrete protein in large amounts. In recent years, several reviews have been dedicated to genetic tools developed for this purpose. Though the construction of efficient cell factories for recombinant protein synthesis is important, the development of an efficient process for recombinant protein production in a bioreactor constitutes an equally vital aspect. Indeed, a sports car cannot drive fast on a gravel road. The aim of this review is to provide a comprehensive snapshot of process tools to consider for recombinant protein production in bioreactor using Y. lipolytica as a cell factory, in order to facilitate the decision-making for future strain and process engineering.
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Affiliation(s)
- Marie Vandermies
- TERRA Teaching and Research Centre, Microbial Processes and Interactions, University of Liège⁻Gembloux AgroBio Tech, 5030 Gembloux, Belgium.
| | - Patrick Fickers
- TERRA Teaching and Research Centre, Microbial Processes and Interactions, University of Liège⁻Gembloux AgroBio Tech, 5030 Gembloux, Belgium.
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8
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Gündüz Ergün B, Hüccetoğulları D, Öztürk S, Çelik E, Çalık P. Established and Upcoming Yeast Expression Systems. Methods Mol Biol 2019; 1923:1-74. [PMID: 30737734 DOI: 10.1007/978-1-4939-9024-5_1] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Yeast was the first microorganism used by mankind for biotransformation of feedstock that laid the foundations of industrial biotechnology. Long historical use, vast amount of data, and experience paved the way for Saccharomyces cerevisiae as a first yeast cell factory, and still it is an important expression platform as being the production host for several large volume products. Continuing special needs of each targeted product and different requirements of bioprocess operations have led to identification of different yeast expression systems. Modern bioprocess engineering and advances in omics technology, i.e., genomics, transcriptomics, proteomics, secretomics, and interactomics, allow the design of novel genetic tools with fine-tuned characteristics to be used for research and industrial applications. This chapter focuses on established and upcoming yeast expression platforms that have exceptional characteristics, such as the ability to utilize a broad range of carbon sources or remarkable resistance to various stress conditions. Besides the conventional yeast S. cerevisiae, established yeast expression systems including the methylotrophic yeasts Pichia pastoris and Hansenula polymorpha, the dimorphic yeasts Arxula adeninivorans and Yarrowia lipolytica, the lactose-utilizing yeast Kluyveromyces lactis, the fission yeast Schizosaccharomyces pombe, and upcoming yeast platforms, namely, Kluyveromyces marxianus, Candida utilis, and Zygosaccharomyces bailii, are compiled with special emphasis on their genetic toolbox for recombinant protein production.
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Affiliation(s)
- Burcu Gündüz Ergün
- Biochemical Reaction Engineering Laboratory, Department of Chemical Engineering, Middle East Technical University, Ankara, Turkey
| | - Damla Hüccetoğulları
- Biochemical Reaction Engineering Laboratory, Department of Chemical Engineering, Middle East Technical University, Ankara, Turkey
| | - Sibel Öztürk
- Biochemical Reaction Engineering Laboratory, Department of Chemical Engineering, Middle East Technical University, Ankara, Turkey
| | - Eda Çelik
- Department of Chemical Engineering, Hacettepe University, Ankara, Turkey
- Bioengineering Division, Institute of Science, Hacettepe University, Ankara, Turkey
| | - Pınar Çalık
- Biochemical Reaction Engineering Laboratory, Department of Chemical Engineering, Middle East Technical University, Ankara, Turkey.
- Industrial Biotechnology and Metabolic Engineering Laboratory, Department of Biotechnology, Graduate School of Natural and Applied Sciences, Middle East Technical University, Ankara, Turkey.
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9
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You X, Qin Z, Li YX, Yan QJ, Li B, Jiang ZQ. Structural and biochemical insights into the substrate-binding mechanism of a novel glycoside hydrolase family 134 β-mannanase. Biochim Biophys Acta Gen Subj 2018; 1862:1376-1388. [DOI: 10.1016/j.bbagen.2018.03.016] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2017] [Revised: 03/08/2018] [Accepted: 03/10/2018] [Indexed: 12/11/2022]
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10
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Germec M, Yatmaz E, Karahalil E, Turhan İ. Effect of different fermentation strategies on β-mannanase production in fed-batch bioreactor system. 3 Biotech 2017; 7:77. [PMID: 28455720 DOI: 10.1007/s13205-017-0694-9] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2017] [Accepted: 03/15/2017] [Indexed: 10/19/2022] Open
Abstract
Mannanases, one of the important enzyme group for industry, are produced by numerous filamentous fungi, especially Aspergillus species with different fermentation methods. The aim of this study was to show the best fermentation method of β-mannanase production for fungal growth in fermenter. Therefore, different fermentation strategies in fed-batch fermentation (suspended, immobilized cell, biofilm and microparticle-enhanced bioreactor) were applied for β-mannanase production from glucose medium (GM) and carob extract medium (CEM) by using recombinant Aspergillus sojae. The highest β-mannanase activities were obtained from microparticle-enhanced bioreactor strategy. It was found to be 347.47 U/mL by adding 10 g/L of Al2O3 to GM and 439.13 U/mL by adding 1 g/L of talcum into CEM. The maximum β-mannanase activities for suspended, immobilization, and biofilm reactor remained at 72.55 U/mL in GM, 148.81 U/mL in CEM, and 194.09 U/mL in GM, respectively. The reason for that is the excessive, and irregular shaped growth and bulk formation, inadequate oxygen transfer or substrate diffusion in bioreactor. Consequently, the enzyme activity was significantly enhanced by addition of microparticles compared to other fed-batch fermentation strategies. Also, repeatable β-mannanase activities were obtained by controlling of the cell morphology by adding microparticle inside the fermenter.
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11
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YaPing W, Ben R, Ling Z, Lixin M. High-level expression of two thermophilic β-mannanases in Yarrowialipolytica. Protein Expr Purif 2017; 133:1-7. [DOI: 10.1016/j.pep.2017.02.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Revised: 11/21/2016] [Accepted: 02/08/2017] [Indexed: 12/01/2022]
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Li N, Wang H, Li L, Cheng H, Liu D, Cheng H, Deng Z. Integrated Approach To Producing High-Purity Trehalose from Maltose by the Yeast Yarrowia lipolytica Displaying Trehalose Synthase (TreS) on the Cell Surface. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2016; 64:6179-6187. [PMID: 27472444 DOI: 10.1021/acs.jafc.6b02175] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
An alternative strategy that integrated enzyme production, trehalose biotransformation, and bioremoval in one bioreactor was developed in this study, thus simplifying the traditional procedures used for trehalose production. The trehalose synthase gene from a thermophilic archaea, Picrophilus torridus, was first fused to the YlPir1 anchor gene and then inserted into the genome of Yarrowia lipolytica, thus yielding an engineered yeast strain. The trehalose yield reached 73% under optimal conditions. The thermal and pH stabilities of the displayed enzyme were improved compared to those of its free form purified from recombinant Escherichia coli. After biotransformation, the glucose byproduct and residual maltose were directly fermented to ethanol by a Saccharomyces cerevisiae strain. Ethanol can be separated by distillation, and high-purity trehalose can easily be obtained from the fermentation broth. The results show that this one-pot procedure is an efficient approach to the economical production of trehalose from maltose.
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Affiliation(s)
| | - Hengwei Wang
- Innovation & Application Institute (IAI), Zhejiang Ocean University , Zhoushan 316022, China
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Tang CD, Shi HL, Tang QH, Zhou JS, Yao LG, Jiao ZJ, Kan YC. Genome mining and motif truncation of glycoside hydrolase family 5 endo-β-1,4-mannanase encoded by Aspergillus oryzae RIB40 for potential konjac flour hydrolysis or feed additive. Enzyme Microb Technol 2016; 93-94:99-104. [PMID: 27702490 DOI: 10.1016/j.enzmictec.2016.08.003] [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: 04/12/2016] [Revised: 06/16/2016] [Accepted: 08/01/2016] [Indexed: 11/24/2022]
Abstract
Two novel glycosyl hydrolase family 5 (GH5) β-mannanases (AoMan5A and AoMan5B) were identified from Aspergillus oryzae RIB40 by genome mining. The AoMan5A contains a predicted family 1 carbohydrate binding module (CBM-1), located at its N-terminal. The AoMan5A, AoMan5B and truncated mutant AoMan5AΔCL (truncating the N-terminal CBM and linker of AoMan5A) were expressed retaining the N-terminus of the native protein in Pichia pastoris GS115 by pPIC9KM. The specific enzyme activity of the purified reAoMan5A, reAoMan5B and reAoMan5AΔCL towards locust bean gum at pH 3.6 and 40°C for 10min, was 8.3, 104.2 and 15.8U/mg, respectively. The temperature properties of the reAoMan5AΔCL were improved by truncating CBM. They can degrade the pretreated konjac flour and produce prebiotics. In addition, they had excellent stability under simulative gastric fluid and simulative prilling process. All these properties make these recombinant β-mannanases potential additives for use in the food and feed industries.
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Affiliation(s)
- Cun-Duo Tang
- Henan Provincial Engineering Laboratory of Insect Bio-reactor, Nanyang Normal University, 1638 Wolong Road, Nanyang, Henan 473061, People's Republic of China
| | - Hong-Ling Shi
- Henan Provincial Engineering Laboratory of Insect Bio-reactor, Nanyang Normal University, 1638 Wolong Road, Nanyang, Henan 473061, People's Republic of China
| | - Qing-Hai Tang
- Henan Provincial Engineering Laboratory of Insect Bio-reactor, Nanyang Normal University, 1638 Wolong Road, Nanyang, Henan 473061, People's Republic of China
| | - Jun-Shi Zhou
- Henan Provincial Engineering Laboratory of Insect Bio-reactor, Nanyang Normal University, 1638 Wolong Road, Nanyang, Henan 473061, People's Republic of China
| | - Lun-Guang Yao
- Henan Provincial Engineering Laboratory of Insect Bio-reactor, Nanyang Normal University, 1638 Wolong Road, Nanyang, Henan 473061, People's Republic of China.
| | - Zhu-Jin Jiao
- Henan Provincial Engineering Laboratory of Insect Bio-reactor, Nanyang Normal University, 1638 Wolong Road, Nanyang, Henan 473061, People's Republic of China
| | - Yun-Chao Kan
- Henan Provincial Engineering Laboratory of Insect Bio-reactor, Nanyang Normal University, 1638 Wolong Road, Nanyang, Henan 473061, People's Republic of China.
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Kaira GS, Panwar D, Kapoor M. Recombinant endo-mannanase (ManB-1601) production using agro-industrial residues: Development of economical medium and application in oil extraction from copra. BIORESOURCE TECHNOLOGY 2016; 209:220-227. [PMID: 26970925 DOI: 10.1016/j.biortech.2016.02.133] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Revised: 02/27/2016] [Accepted: 02/29/2016] [Indexed: 06/05/2023]
Abstract
Expression of pRSETA manb-1601 construct in Hi-Control Escherichia coli BL21 (DE3) cells improved recombinant endo-mannanase (ManB-1601) production by 2.73-fold (1821±100U/ml). A low-cost, agro-industrial residue supplemented industrial medium for enhanced and economical production of ManB-1601 was developed in two mutual phases. Phase-I revealed the potential of various pre- (induction time: 5h, induction mode: lactose 0.5mM) and post-induction [peptone supplementation: 0.94%(w/v), glycerol 0.123%(v/v)] parameters for enhanced production of ManB-1601 and resulted in 4.61-fold (8406±400U/ml) and 2.53-fold (3.30g/l) higher ManB-1601 and biomass production, respectively. Under phase-II, economization of phase-I medium was carried out by reducing/replacing costly ingredients with solubilized-defatted flax seed meal (S-DFSM), which resulted in 3.25-fold (5926U/ml) higher ManB-1601 production. Industrial potential of ManB-1601 was shown in oil extraction from copra as enzyme treatment led to cracks, peeling, fracturing and smoothening of copra, which facilitated higher (18.75%) oil yield.
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Affiliation(s)
- Gaurav Singh Kaira
- Department of Protein Chemistry and Technology, CSIR-Central Food Technological Research Institute, Mysuru 570 020, India; Academy of Scientific and Innovative Research (AcSIR), CSIR-CFTRI Campus, Mysuru, India
| | - Deepesh Panwar
- Department of Protein Chemistry and Technology, CSIR-Central Food Technological Research Institute, Mysuru 570 020, India; Academy of Scientific and Innovative Research (AcSIR), CSIR-CFTRI Campus, Mysuru, India
| | - Mukesh Kapoor
- Department of Protein Chemistry and Technology, CSIR-Central Food Technological Research Institute, Mysuru 570 020, India; Academy of Scientific and Innovative Research (AcSIR), CSIR-CFTRI Campus, Mysuru, India.
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15
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Zhang H, Zhang L, Chen H, Chen YQ, Chen W, Song Y, Ratledge C. Enhanced lipid accumulation in the yeast Yarrowia lipolytica by over-expression of ATP:citrate lyase from Mus musculus. J Biotechnol 2015; 192 Pt A:78-84. [PMID: 25450640 DOI: 10.1016/j.jbiotec.2014.10.004] [Citation(s) in RCA: 78] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2014] [Revised: 09/15/2014] [Accepted: 10/01/2014] [Indexed: 12/18/2022]
Abstract
Yarrowia lipolytica can accumulate large amounts of storage lipids and has considerable potential for the production of polyunsaturated fatty acids and other lipids for biofuels. When the nitrogen source is exhausted in the medium, the key intermediate, citrate, is converted to acetyl-CoA by ATP:citrate lyase (ACL) for lipid accumulation. However, in this yeast most of the citrate is also secreted into the culture medium. To increase the endogenous substrate (acetyl-CoA) level for lipid biosynthesis, the acl gene from Mus musculus was over-expressed in Y. lipolytica with mono-copy integration vector pINA1312sp and multi-copy integration vector pINA1292sp. This increased the lipid content from 7.3% to between 11% and 23% (w/w) of the cell dry weight. Cell growth was only slightly affected. Multi-copy integration transformants had higher lipid contents than mono-copy integration transformants; the lipid content of the transformants was consistent with the copy number of acl gene integrated. Over-expression of ACL had no significant effect on fatty acid profile of the yeast. These results suggested that ACL is an important acetyl-CoA producer and plays a vital role in lipid accumulation in oleaginous yeast Y. lipolytica.
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Yarrowia lipolytica: recent achievements in heterologous protein expression and pathway engineering. Appl Microbiol Biotechnol 2015; 99:4559-77. [PMID: 25947247 DOI: 10.1007/s00253-015-6624-z] [Citation(s) in RCA: 149] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2015] [Revised: 04/17/2015] [Accepted: 04/18/2015] [Indexed: 12/13/2022]
Abstract
The oleaginous yeast Yarrowia lipolytica has become a recognized system for expression/secretion of heterologous proteins. This non-conventional yeast is currently being developed as a workhorse for biotechnology by several research groups throughout the world, especially for single-cell oil production, whole cell bioconversion and upgrading of industrial wastes. This mini-review presents established tools for protein expression in Y. lipolytica and highlights novel developments in the areas of promoter design, surface display, and host strain or metabolic pathway engineering. An overview of the industrial and commercial biotechnological applications of Y. lipolytica is also presented.
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Li M, Yu X, Wang F, Zhai C, Shen W, Yu X, Wang X, Ma L. Secretory expression of organophosphorus hydrolase OPHC2 in Yarrowia lipolytica Polg. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART. B, PESTICIDES, FOOD CONTAMINANTS, AND AGRICULTURAL WASTES 2015; 50:691-697. [PMID: 26273753 DOI: 10.1080/03601234.2015.1048101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
In the present study, recombinant organophosphorus hydrolase OPHC2 was successfully produced by Yarrowia lipolytica and purified. Sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) and western blot analyses showed a major polypeptide band of 36 kDa. The purified enzyme was optimally active at 65°C and pH 8.5 and also displayed good thermal and pH stability using methyl parathion (O,O-dimethyl-O-4-p-nitrophenyl phosphorothioate) as a substrate. Moreover, as Y. lipolytica is a non-pathogenic, generally regarded as safe (GRAS) yeast, the cell culture supernatant can be used directly on vegetables and fruits that are contaminated by organophosphorus pesticides.
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Affiliation(s)
- Meng Li
- a Hubei Collaborative Innovation Center for Green Transformation of Bio-resources, Hubei Key Laboratory of Industrial Biotechnology, College of Life Sciences, Hubei University , Wuhan , Hubei Province , P. R. China
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Malherbe AR, Rose SH, Viljoen-Bloom M, van Zyl WH. Expression and evaluation of enzymes required for the hydrolysis of galactomannan. J Ind Microbiol Biotechnol 2014; 41:1201-9. [PMID: 24888762 DOI: 10.1007/s10295-014-1459-7] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2014] [Accepted: 05/08/2014] [Indexed: 11/25/2022]
Abstract
The cost-effective production of bioethanol from lignocellulose requires the complete conversion of plant biomass, which contains up to 30 % mannan. To ensure utilisation of galactomannan during consolidated bioprocessing, heterologous production of mannan-degrading enzymes in fungal hosts was explored. The Aspergillus aculeatus endo-β-mannanase (Man1) and Talaromyces emersonii α-galactosidase (Agal) genes were expressed in Saccharomyces cerevisiae Y294, and the Aspergillus niger β-mannosidase (cMndA) and synthetic Cellvibrio mixtus β-mannosidase (Man5A) genes in A. niger. Maximum enzyme activity for Man1 (374 nkat ml(-1), pH 5.47), Agal (135 nkat ml(-1), pH 2.37), cMndA (12 nkat ml(-1), pH 3.40) and Man5A (8 nkat ml(-1), pH 3.40) was observed between 60 and 70 °C. Co-expression of the Man1 and Agal genes in S. cerevisiae Y294[Agal-Man1] reduced the extracellular activity relative to individual expression of the respective genes. However, the combined action of crude Man1, Agal and Man5A enzyme preparations significantly decreased the viscosity of galactomannan in locust bean gum, confirming hydrolysis thereof. Furthermore, when complemented with exogenous Man5A, S. cerevisiae Y294[Agal-Man1] produced 56 % of the theoretical ethanol yield, corresponding to a 66 % carbohydrate conversion, on 5 g l(-1) mannose and 10 g l(-1) locust bean gum.
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Affiliation(s)
- A R Malherbe
- Department of Microbiology, Stellenbosch University, Private Bag X1, Matieland, 7602, South Africa
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Application of Endo-β-1,4,d-mannanase and Cellulase for the Release of Mannooligosaccharides from Steam-Pretreated Spent Coffee Ground. Appl Biochem Biotechnol 2014; 172:3538-57. [DOI: 10.1007/s12010-014-0770-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2013] [Accepted: 02/03/2014] [Indexed: 12/20/2022]
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Enhancing expression level of an acidophilic β-mannanase in Pichia pastoris by double vector system. ANN MICROBIOL 2013. [DOI: 10.1007/s13213-013-0689-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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Zhang B, Chen H, Li M, Gu Z, Song Y, Ratledge C, Chen YQ, Zhang H, Chen W. Genetic engineering of Yarrowia lipolytica for enhanced production of trans-10, cis-12 conjugated linoleic acid. Microb Cell Fact 2013; 12:70. [PMID: 23866108 PMCID: PMC3750285 DOI: 10.1186/1475-2859-12-70] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2013] [Accepted: 05/22/2013] [Indexed: 11/12/2022] Open
Abstract
Background Conjugated linoleic acid (CLA) has been extensively studied for decades because of its health benefits including cancer prevention, anti-atherogenic and anti-obesity effects, and modulation of the immune system. We previously described the production of trans-10, cis-12 CLA in Yarrowia lipolytica by expressing the gene coding for linoleic acid isomerase from Propionibacterium acnes (pai). However the stable strain produced CLA at about 0.08% of dry cell weight (DCW), a level of production which was not high enough for practical applications. The goal of the present study was to enhance production of CLA by genetic engineering of Y. lipolytica strains. Results We have now co-expressed the delta 12-desaturase gene (FADS12, d12) from Mortierella alpina together with the codon-optimized linoleic acid isomerase (opai) gene in Y. lipolytica, expressed under the control of promoter hp16d modified by fusing 12 copies of UAS1B to the original promoter hp4d. A multi-copy integration plasmid was used to further enhance the expression of both genes. Using glucose as the sole carbon source, the genetically-modified Y. lipolytica produced trans-10, cis-12-CLA at a level of up to 10% of total fatty acids and 0.4% of DCW. Furthermore, when the recombinant yeast was grown with soybean oil, trans-10, cis-12-CLA now accumulated at a level of up to 44% of total fatty acids, which represented 30% of DCW after 38.5 h of cultivation. In addition, trans-10, cis-12-CLA was also detected in the growth medium up to 0.9 g/l. Conclusions We have successfully produced trans-10, cis-12-CLA with a titre of 4 g/l of culture (3.1 g/l in cells and 0.9 g/l in culture medium). Our results demonstrate the potential use of Y. lipolytica as a promising microbial cell factory for trans-10, cis-12-CLA production.
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Hofmeyer T, Bulani SI, Grzeschik J, Krah S, Glotzbach B, Uth C, Avrutina O, Brecht M, Göringer HU, van Zyl P, Kolmar H. Protein Production in Yarrowia lipolytica Via Fusion to the Secreted Lipase Lip2p. Mol Biotechnol 2013; 56:79-90. [DOI: 10.1007/s12033-013-9684-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Fusing a carbohydrate-binding module into the Aspergillus usamii β-mannanase to improve its thermostability and cellulose-binding capacity by in silico design. PLoS One 2013; 8:e64766. [PMID: 23741390 PMCID: PMC3669383 DOI: 10.1371/journal.pone.0064766] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2013] [Accepted: 04/18/2013] [Indexed: 11/25/2022] Open
Abstract
The AuMan5A, an acidophilic glycoside hydrolase (GH) family 5 β-mannanase derived from Aspergillus usamii YL-01-78, consists of an only catalytic domain (CD). To perfect enzymatic properties of the AuMan5A, a family 1 carbohydrate-binding module (CBM) of the Trichoderma reesei cellobiohydrolase I (TrCBH I), having the lowest binding free energy with cellobiose, was selected by in silico design, and fused into its C-terminus forming a fusion β-mannanase, designated as AuMan5A-CBM. Then, its encoding gene, Auman5A-cbm, was constructed as it was designed theoretically, and expressed in Pichia pastoris GS115. SDS-PAGE analysis displayed that both recombinant AuMan5A-CBM (reAuMan5A-CBM) and AuMan5A (reAuMan5A) were secreted into the cultured media with apparent molecular masses of 57.3 and 49.8 kDa, respectively. The temperature optimum of the reAuMan5A-CBM was 75°C, being 5°C higher than that of the reAuMan5A. They were stable at temperatures of 68 and 60°C, respectively. Compared with reAuMan5A, the reAuMan5A-CBM showed an obvious decrease in Km and a slight alteration in Vmax. In addition, the fusion of a CBM of the TrCBH I into the AuMan5A contributed to its cellulose-binding capacity.
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Madzak C, Beckerich JM. Heterologous Protein Expression and Secretion in Yarrowia lipolytica. YARROWIA LIPOLYTICA 2013. [DOI: 10.1007/978-3-642-38583-4_1] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Lin H, Wang Q, Shen Q, Zhan J, Zhao Y. Genetic engineering of microorganisms for biodiesel production. Bioengineered 2012; 4:292-304. [PMID: 23222170 DOI: 10.4161/bioe.23114] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Biodiesel, as one type of renewable energy, is an ideal substitute for petroleum-based diesel fuel and is usually made from triacylglycerides by transesterification with alcohols. Biodiesel production based on microbial fermentation aiming to establish more efficient, less-cost and sustainable biodiesel production strategies is under current investigation by various start-up biotechnology companies and research centers. Genetic engineering plays a key role in the transformation of microbes into the desired cell factories with high efficiency of biodiesel production. Here, we present an overview of principal microorganisms used in the microbial biodiesel production and recent advances in metabolic engineering for the modification required. Overexpression or deletion of the related enzymes for de novo synthesis of biodiesel is highlighted with relevant examples.
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Affiliation(s)
- Hui Lin
- Institute of Microbiology; College of Life Sciences; Zhejiang University; Hangzhou, China; Institute of Plant Science; College of Life Sciences; Zhejiang University; Hangzhou, China
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Zhao SG, Wu MC, Tang CD, Gao SJ, Zhang HM, Li JF. Cloning and bioinformatic analysis of an acidophilic β-mannanase gene, Anman5A, from Aspergillus niger LW-1. APPL BIOCHEM MICRO+ 2012. [DOI: 10.1134/s000368381205016x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Zhang B, Rong C, Chen H, Song Y, Zhang H, Chen W. De novo synthesis of trans-10, cis-12 conjugated linoleic acid in oleaginous yeast Yarrowia lipolytica. Microb Cell Fact 2012; 11:51. [PMID: 22545818 PMCID: PMC3390286 DOI: 10.1186/1475-2859-11-51] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2011] [Accepted: 04/30/2012] [Indexed: 02/08/2023] Open
Abstract
Background Conjugated linoleic acid (CLA) has many well-documented beneficial physiological effects. Due to the insufficient natural supply of CLA and low specificity of chemically produced CLA, an effective and isomer-specific production process is required for medicinal and nutritional purposes. Results The linoleic acid isomerase gene from Propionibacterium acnes was expressed in Yarrowia lipolytica Polh. Codon usage optimization of the PAI and multi-copy integration significantly improved the expression level of PAI in Y. lipolytica. The percentage of trans-10, cis-12 CLA was six times higher in yeast carrying the codon-optimized gene than in yeast carrying the native gene. In combination with multi-copy integration, the production yield was raised to approximately 30-fold. The amount of trans-10, cis-12 CLA reached 5.9% of total fatty acid yield in transformed Y. lipolytica. Conclusions This is the first report of production of trans-10, cis-12 CLA by the oleaginous yeast Y. lipolytica, using glucose as the sole carbon source through expression of linoleic acid isomerase from Propionibacterium acnes.
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Affiliation(s)
- Baixi Zhang
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, People's Republic of China
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Li JF, Zhao SG, Tang CD, Wang JQ, Wu MC. Cloning and functional expression of an acidophilic β-mannanase gene (Anman5A) from Aspergillus niger LW-1 in Pichia pastoris. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2012; 60:765-773. [PMID: 22225502 DOI: 10.1021/jf2041565] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
A cDNA fragment of the Anman5A, a gene that encodes an acidophilic β-mannanase of Aspergillus niger LW-1 (abbreviated as AnMan5A), was cloned and functionally expressed in Pichia pastoris . Homology alignment of amino acid sequences verified that the AnMan5A belongs to the glycoside hydrolase (GH) family 5. Sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) assay demonstrated that the recombinant AnMan5A (reAnMan5A), a N-glycosylated protein with an apparent molecular weight of 52.0 kDa, was secreted into the medium. The highest reAnMan5A activity expressed by one P. pastoris transformant, labeled as GSAnMan4-12, reached 29.0 units/mL. The purified reAnMan5A displayed the highest activity at pH 3.5 and 70 °C. It was stable at a pH range of 3.0-7.0 and at a temperature of 60 °C or below. Its activity was not significantly affected by an array of metal ions and ethylenediaminetetraacetic acid (EDTA). The K(m) and V(max) of the reAnMan5A, toward locust bean gum, were 1.10 mg/mL and 266.7 units/mg, respectively.
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Affiliation(s)
- Jian-Fang Li
- School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China
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High level expression of a novel β-mannanase from Chaetomium sp. exhibiting efficient mannan hydrolysis. Carbohydr Polym 2012; 87:480-490. [DOI: 10.1016/j.carbpol.2011.08.008] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2011] [Revised: 07/29/2011] [Accepted: 08/04/2011] [Indexed: 11/23/2022]
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Cloning and bioinformatics analysis of a novel acidophilic β-mannanase gene, Auman5A, from Aspergillus usamii YL-01-78. World J Microbiol Biotechnol 2011. [DOI: 10.1007/s11274-011-0775-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Yuzbasheva EY, Yuzbashev TV, Laptev IA, Konstantinova TK, Sineoky SP. Efficient cell surface display of Lip2 lipase using C-domains of glycosylphosphatidylinositol-anchored cell wall proteins of Yarrowia lipolytica. Appl Microbiol Biotechnol 2011; 91:645-54. [PMID: 21494864 DOI: 10.1007/s00253-011-3265-8] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2010] [Revised: 03/15/2011] [Accepted: 04/05/2011] [Indexed: 10/18/2022]
Abstract
The cell surface display of enzymes is of great interest because of its simplified purification stage and the possibility for recycling in industrial processes. In this study, we have focused on the cell wall immobilization of Yarrowia lipolytica Lip2 protein--an enzyme that has a wide technological application. By genome analysis of Y. lipolytica in addition to already characterized Ylcwp1, we identified five putative open reading frames encoding glycosylphosphatidylinositol-anchored proteins. Lip2 translation fusion with the carboxyl termini of these proteins revealed that all proteins were capable of immobilizing lipase in active form on the cell surface. The highest level of cell-bound lipase activity was achieved using C-domains encoded by YlCWP1, YlCWP3 (YALI0D27214g) and YlCWP6 (YALI0F18282g) comprising 16,173 ± 1,800, 18,785 ± 1,130 and 17,700 ± 2,101 U/g dry cells, respectively. To the best of our knowledge, these results significantly exceed the highest cell-bound lipase activity previously reported for engineered Saccharomyces cerevisiae and Pichia pastoris strains. Furthermore, the lyophilized biomass retained the activity and was robust to collecting/resuspending procedures. Nevertheless, in most cases, a substantial amount of lipase activity was also found in the growth medium. Further work will be necessary to better understand the nature of this phenomenon.
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Affiliation(s)
- Evgeniya Y Yuzbasheva
- Russian State Collection of Industrial Microorganisms (VKPM), State Research Institute of Genetics and Selection of Industrial Microorganisms, Moscow 117545, Russia.
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Bien-Cuong D, Thi-Thu D, Berrin JG, Haltrich D, Kim-Anh T, Sigoillot JC, Yamabhai M. Cloning, expression in Pichia pastoris, and characterization of a thermostable GH5 mannan endo-1,4-beta-mannosidase from Aspergillus niger BK01. Microb Cell Fact 2009; 8:59. [PMID: 19912637 PMCID: PMC2780388 DOI: 10.1186/1475-2859-8-59] [Citation(s) in RCA: 91] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2009] [Accepted: 11/13/2009] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Mannans are key components of lignocellulose present in the hemicellulosic fraction of plant primary cell walls. Mannan endo-1,4-beta-mannosidases (1,4-beta-D-mannanases) catalyze the random hydrolysis of beta-1,4-mannosidic linkages in the main chain of beta-mannans. Biodegradation of beta-mannans by the action of thermostable mannan endo-1,4-beta-mannosidase offers significant technical advantages in biotechnological industrial applications, i.e. delignification of kraft pulps or the pretreatment of lignocellulosic biomass rich in mannan for the production of second generation biofuels, as well as for applications in oil and gas well stimulation, extraction of vegetable oils and coffee beans, and the production of value-added products such as prebiotic manno-oligosaccharides (MOS). RESULTS A gene encoding mannan endo-1,4-beta-mannosidase or 1,4-beta-D-mannan mannanohydrolase (E.C. 3.2.1.78), commonly termed beta-mannanase, from Aspergillus niger BK01, which belongs to glycosyl hydrolase family 5 (GH5), was cloned and successfully expressed heterologously (up to 243 microg of active recombinant protein per mL) in Pichia pastoris. The enzyme was secreted by P. pastoris and could be collected from the culture supernatant. The purified enzyme appeared glycosylated as a single band on SDS-PAGE with a molecular mass of approximately 53 kDa. The recombinant beta-mannanase is highly thermostable with a half-life time of approximately 56 h at 70 degrees C and pH 4.0. The optimal temperature (10-min assay) and pH value for activity are 80 degrees C and pH 4.5, respectively. The enzyme is not only active towards structurally different mannans but also exhibits low activity towards birchwood xylan. Apparent Km values of the enzyme for konjac glucomannan (low viscosity), locust bean gum galactomannan, carob galactomannan (low viscosity), and 1,4-beta-D-mannan (from carob) are 0.6 mg mL-1, 2.0 mg mL-1, 2.2 mg mL-1 and 1.5 mg mL-1, respectively, while the kcat values for these substrates are 215 s-1, 330 s-1, 292 s-1 and 148 s-1, respectively. Judged from the specificity constants kcat/Km, glucomannan is the preferred substrate of the A. niger beta -mannanase. Analysis by thin layer chromatography showed that the main product from enzymatic hydrolysis of locust bean gum is mannobiose, with only low amounts of mannotriose and higher manno-oligosaccharides formed. CONCLUSION This study is the first report on the cloning and expression of a thermostable mannan endo-1,4-beta-mannosidase from A. niger in Pichia pastoris. The efficient expression and ease of purification will significantly decrease the production costs of this enzyme. Taking advantage of its acidic pH optimum and high thermostability, this recombinant beta-mannanase will be valuable in various biotechnological applications.
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Affiliation(s)
- Do Bien-Cuong
- Institute of Biological and Food Technology, Hanoi University of Technology, Hanoi, Vietnam
| | - Dang Thi-Thu
- Institute of Biological and Food Technology, Hanoi University of Technology, Hanoi, Vietnam
| | - Jean-Guy Berrin
- INRA, UMR1163 de Biotechnologie des Champignons Filamenteux, ESIL, 163 avenue de Luminy, CP 925, 13288 Marseille Cedex 09, France
| | - Dietmar Haltrich
- BOKU - University of Natural Resources and Applied Life Sciences, Vienna, Austria
| | - To Kim-Anh
- Institute of Biological and Food Technology, Hanoi University of Technology, Hanoi, Vietnam
| | - Jean-Claude Sigoillot
- INRA, UMR1163 de Biotechnologie des Champignons Filamenteux, ESIL, 163 avenue de Luminy, CP 925, 13288 Marseille Cedex 09, France
- Université de Provence, UMR1163 de Biotechnologie des Champignons Filamenteux, ESIL, 163 Avenue de Luminy, CP 925, 13288 Marseille Cedex 09, France
| | - Montarop Yamabhai
- School of Biotechnology, Institute of Agricultural Technology, Suranaree University of Technology, 111 University Avenue, Nakhon Ratchasima, 30000, Thailand
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Cell-surface display of the active mannanase in Yarrowia lipolytica with a novel surface-display system. Biotechnol Appl Biochem 2009; 54:171-6. [PMID: 19723025 DOI: 10.1042/ba20090222] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A novel surface-display system was constructed using the cell-wall anchor protein Flo1p from Saccharomyces cerevisiae, the mannanase (man1) from Bacillus subtilis fused with the C-terminus of Flo1p and the 6xHis tag was inserted between Flo1p and man1. The fusion protein was displayed on the cell surface of Yarrowia lipolytica successfully, and it was confirmed by immunofluorescence. In succession, the surface-displayed mannanase was characterized. The optimum catalytic conditions for the recombinant mannanase were 55 degrees C at pH 6.0, and it exhibited high stability against pH variation. The highest activity of the recombinant mannanase reached 62.3 IU/g (dry cell weight) after the recombinant was cultivated for 96 h in YPD medium [1% (w/v) yeast extract/2% (w/v) peptone/2% (w/v) glucose]. To our knowledge, the present paper is the first to report that high-activity mannanase is displayed on the cell surface of Y. lipolytica with Flo1p.
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