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Zhou Z, Zhou H, Zhang J. Development of wheat bran hydrolysate as Komagataella phaffii medium for heterologous protein production. Bioprocess Biosyst Eng 2021; 44:2645-2654. [PMID: 34468865 DOI: 10.1007/s00449-021-02633-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Accepted: 08/29/2021] [Indexed: 12/30/2022]
Abstract
Developing a Komagataella phaffii (K. phaffii, named as Pichia pastoris formerly) medium using wheat bran hydrolysate (WBH) is a potential approach for wheat bran utilization and heterologous protein by K. phaffii because K. phaffii is used as protein producer by researchers and engineers widely. In this research, the detoxification process of WBH was optimized to obtain the final procedure as pH adjusting to 10 by calcium hydroxide addition, then, 2.0 g/L active carbon absorption followed by 1 h shaking and 3,600 × g centrifugation for 10 min, finally, 3.75 mmol/L sodium thiosulfate addition for 10 min shaking followed by 3,600 × g centrifugation for 10 min. Recombinant K. phaffii-xynB harboring xylanase B gene from Aspergillus niger ATCC 1015 under alcohol oxidase 1 promoter (PAOX1) was cultivated in detoxified WBH expressing 1059.8 U/mL xylanase B which was 90.9% of that in complex medium from Pichia protocols. These researches built a solid base for detoxified WBH as a low-cost medium of K. phaffii to express heterologous protein, also provided a bright outlet for wheat bran utilization.
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Affiliation(s)
- Ziwei Zhou
- Shanghai Engineering Research Center for Food Rapid Detection, Institute of Food Science and Engineering, School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai, 200093, People's Republic of China
| | - Hualan Zhou
- Shanghai Engineering Research Center for Food Rapid Detection, Institute of Food Science and Engineering, School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai, 200093, People's Republic of China
| | - Jianguo Zhang
- Shanghai Engineering Research Center for Food Rapid Detection, Institute of Food Science and Engineering, School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai, 200093, People's Republic of China.
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Velastegui E, Theron C, Berrios J, Fickers P. Downregulation by organic nitrogen of AOX1 promoter used for controlled expression of foreign genes in the yeast Pichia pastoris. Yeast 2019; 36:297-304. [PMID: 30699241 DOI: 10.1002/yea.3381] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Revised: 01/14/2019] [Accepted: 01/23/2019] [Indexed: 01/18/2023] Open
Abstract
Pichia pastoris is a well-established cell factory for recombinant protein synthesis. Various optimization strategies of processes based on AOX1 promoter have been investigated, including methanol co-feeding with glycerol or sorbitol during the induction stage. Compared with carbon sources, comparatively little research has been devoted to the effects of nitrogen sources. Several reports have described the benefits of adding casamino acids (CA) to the recombinant protein production medium, however, without considering its effects at the gene expression level. Using enhanced green fluorescent protein as a reporter protein, monitored using flow cytometry, CA was shown to downregulate AOX1 promoter induction. Despite higher growth rates, cultures containing CA exhibited slower transition to the induced state, whereas metabolite analysis revealed that methanol consumption was reduced in the presence of CA compared with its absence. The repressive effect of CA was further confirmed by analysing the synthesis of extracellular recombinant Candida antarctica lipase under control of the AOX1 promoter. These findings highlight nitrogen source selection as an important consideration for AOX1-based protein production.
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Affiliation(s)
- Edgar Velastegui
- Escuela de Ingeniería Bioquímica, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
| | - Chrispian Theron
- Microbial Processes and Interactions, TERRA Teaching and Research Centre, Gembloux Agro Bio Tech, University of Liege, Gembloux, Belgium
| | - Julio Berrios
- Escuela de Ingeniería Bioquímica, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
| | - Patrick Fickers
- Microbial Processes and Interactions, TERRA Teaching and Research Centre, Gembloux Agro Bio Tech, University of Liege, Gembloux, Belgium
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Tavasoli T, Arjmand S, Ranaei Siadat SO, Shojaosadati SA, Sahebghadam Lotfi A. Enhancement of Alpha 1-antitrypsin Production in Pichia pastoris by Designing and Optimizing Medium Using Elemental Analysis. IRANIAN JOURNAL OF BIOTECHNOLOGY 2017; 15:224-231. [PMID: 29845074 DOI: 10.15171/ijb.1808] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2016] [Revised: 10/14/2016] [Accepted: 06/20/2017] [Indexed: 01/01/2023]
Abstract
Background: Human alpha 1-antitrypsin (AAT) is a monomeric glycosylated protein; it is the potent inhibitor of a whole range of serine proteases and protects tissues against their destructive effects. The human plasma-derived AAT, which is currently used to augment the AAT level in patients, is limited due to high cost and source limitation. Recombinant production of AAT can be considered as a potential alternative. Objectives: This study aims to develop and optimize a new chemically defi ned medium based on an elemental analysis of the yeast Pichia pastoris for an effi cient culture of the recombinant yeast-producing secretory AAT. Materials and Methods: An elemental analysis of Carbon (C), Hydrogen (H), Nitrogen (N), Sulfur (S); CHNS in its abbreviated form, and metallic elements was performed to determine the exact molecular constituent of the P. pastoris. The medium components were selected according to the obtained formula; they were optimized by the response surface methodology (RSM). The grown yeast cell was measured at the end of 18 h glycerol batch culture. The amounts of AAT production and elastase inhibitory capacity (EIC) were measured at the end of three days' methanol feeding. Results: The optimized medium compositions consist of glycerol (40 g.L-1), KH2PO4 (24.78 g.L-1), NaCl, (0.88 g.L-1), MgSO4 .7H2 O (1.95 g.L-1), (NH4 )2 SO4 (22.76 g.L-1), and trace elements (20 mL.L-1). The presented quadratic models show that KH2 PO4 and (NH4)2 SO4, are the most abundant ones in the P. pastoris biomass and have the greatest effect on the cell growth, EIC, and AAT protein production responses. Conclusions: According to the results of this study, it can be concluded that the characterizing cell composition formula could be considered as an appropriate method to design culture media in order to improve cell growth and productivity. Compared to the common P. pastoris chemically defi ned media, FM22 and BSM, production of AAT protein increased by 1.5 and 1.4 times, respectively, in this new medium.
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Affiliation(s)
- Tina Tavasoli
- Biotechnology Group, Department of Chemical Engineering, Tarbiat Modares University, Tehran, Iran
| | - Sareh Arjmand
- Protein Research Center, Shahid Beheshti University, G.C., Tehran, Iran
| | | | - Seyed Abbas Shojaosadati
- Biotechnology Group, Department of Chemical Engineering, Tarbiat Modares University, Tehran, Iran
| | - Abbas Sahebghadam Lotfi
- Department of Clinical Biochemistry, Faculty of Medical Science, Tarbiat Modares University, Tehran, Iran
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Bláha BAF, Morris SA, Ogonah OW, Maucourant S, Crescente V, Rosenberg W, Mukhopadhyay TK. Development of a high-throughput microscale cell disruption platform for Pichia pastoris in rapid bioprocess design. Biotechnol Prog 2017; 34:130-140. [PMID: 28884522 DOI: 10.1002/btpr.2555] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Revised: 07/28/2017] [Indexed: 11/10/2022]
Abstract
The time and cost benefits of miniaturized fermentation platforms can only be gained by employing complementary techniques facilitating high-throughput at small sample volumes. Microbial cell disruption is a major bottleneck in experimental throughput and is often restricted to large processing volumes. Moreover, for rigid yeast species, such as Pichia pastoris, no effective high-throughput disruption methods exist. The development of an automated, miniaturized, high-throughput, noncontact, scalable platform based on adaptive focused acoustics (AFA) to disrupt P. pastoris and recover intracellular heterologous protein is described. Augmented modes of AFA were established by investigating vessel designs and a novel enzymatic pretreatment step. Three different modes of AFA were studied and compared to the performance high-pressure homogenization. For each of these modes of cell disruption, response models were developed to account for five different performance criteria. Using multiple responses not only demonstrated that different operating parameters are required for different response optima, with highest product purity requiring suboptimal values for other criteria, but also allowed for AFA-based methods to mimic large-scale homogenization processes. These results demonstrate that AFA-mediated cell disruption can be used for a wide range of applications including buffer development, strain selection, fermentation process development, and whole bioprocess integration. © 2017 American Institute of Chemical Engineers Biotechnol. Prog., 34:130-140, 2018.
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Affiliation(s)
- Benjamin A F Bláha
- The Advanced Centre for Biochemical Engineering, Dept. of Biochemical Engineering, University College London, London, WC1E 7JE, U.K
| | - Stephen A Morris
- The Advanced Centre for Biochemical Engineering, Dept. of Biochemical Engineering, University College London, London, WC1E 7JE, U.K.,iQur Limited, London Bioscience Innovation Centre, London, NW1 0NH, U.K
| | - Olotu W Ogonah
- The Advanced Centre for Biochemical Engineering, Dept. of Biochemical Engineering, University College London, London, WC1E 7JE, U.K
| | - Sophie Maucourant
- iQur Limited, London Bioscience Innovation Centre, London, NW1 0NH, U.K
| | | | - William Rosenberg
- iQur Limited, London Bioscience Innovation Centre, London, NW1 0NH, U.K
| | - Tarit K Mukhopadhyay
- The Advanced Centre for Biochemical Engineering, Dept. of Biochemical Engineering, University College London, London, WC1E 7JE, U.K
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Matthews CB, Kuo A, Love KR, Love JC. Development of a general defined medium for
Pichia pastoris. Biotechnol Bioeng 2017; 115:103-113. [DOI: 10.1002/bit.26440] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Revised: 07/26/2017] [Accepted: 09/01/2017] [Indexed: 11/10/2022]
Affiliation(s)
- Catherine B. Matthews
- Department of Chemical EngineeringKoch Institute for Integrative Cancer ResearchMassachusetts Institute of TechnologyCambridgeMassachusetts
| | - Angel Kuo
- Department of Chemical EngineeringKoch Institute for Integrative Cancer ResearchMassachusetts Institute of TechnologyCambridgeMassachusetts
| | - Kerry R. Love
- Department of Chemical EngineeringKoch Institute for Integrative Cancer ResearchMassachusetts Institute of TechnologyCambridgeMassachusetts
| | - J. Christopher Love
- Department of Chemical EngineeringKoch Institute for Integrative Cancer ResearchMassachusetts Institute of TechnologyCambridgeMassachusetts
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Kaushik N, Rohila D, Arora U, Raut R, Lamminmäki U, Khanna N, Batra G. Casamino acids facilitate the secretion of recombinant dengue virus serotype-3 envelope domain III in Pichia pastoris. BMC Biotechnol 2016; 16:12. [PMID: 26847361 PMCID: PMC4743106 DOI: 10.1186/s12896-016-0243-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2015] [Accepted: 01/24/2016] [Indexed: 01/11/2023] Open
Abstract
Background Dengue is a viral disease spread to humans by mosquitoes. Notably, there are four serotypes of dengue viruses (DENV) that places ~40 % of the global population at risk of infection. However, lack of a suitable drug or a preventive vaccine exacerbates the matter further. Envelope domain-III (EDIII) antigen of dengue virus (DENV) has garnered much attention as a promising vaccine candidate for dengue, in addition to its use as a diagnostic intermediate. Hence developing a method for efficient production of high quality recombinant EDIII is important for research and industrial purpose. Results In this work, a Pichia pastoris system was optimized for the secretory over-expression of DENV serotype-3 EDIII under the control of methanol inducible AOX1 promoter. Temperature alone had a significant impact upon the amount of secretory EDIII, with 2.5-fold increase upon reducing the induction temperature from 30 to 20 °C. However surprisingly, supplementation of culture media with Casamino acids (CA), further augmented secretory EDIII titer, with a concomitant drop of intracellular EDIII levels at both temperatures. Though, reduction in intracellular retention of EDIII was more prominent at 20 °C than 30 °C. This suggests that CA supplementation facilitates overexpressing P. pastoris cells to secrete more EDIII by reducing the proportion retained intracellularly. Moreover, a bell-shaped correlation was observed between CA concentration and secretory EDIII titer. The maximum EDIII expression level of 187 mg/L was achieved under shake flask conditions with induction at 20 °C in the presence of 1 % CA. The overall increase in EDIII titer was ~9-fold compared to un-optimized conditions. Notably, mouse immune-sera, generated using this purified EDIII antigen, efficiently neutralized the DENV. Conclusions The strategy described herein could enable fulfilling the mounting demand for recombinant EDIII as well as lay direction to future studies on secretory expression of recombinant proteins in P. pastoris with CA as a media supplement. Electronic supplementary material The online version of this article (doi:10.1186/s12896-016-0243-3) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Neha Kaushik
- Centre for Biodesign and Diagnostics, Translational Health Science and Technology Institute, NCR Biotech Science Cluster, Faridabad, Haryana, India.
| | - Deepak Rohila
- Centre for Biodesign and Diagnostics, Translational Health Science and Technology Institute, NCR Biotech Science Cluster, Faridabad, Haryana, India.
| | - Upasana Arora
- Recombinant Gene Products Group, International Centre for Genetic Engineering and Biotechnology, New Delhi, India.
| | - Rajendra Raut
- Recombinant Gene Products Group, International Centre for Genetic Engineering and Biotechnology, New Delhi, India.
| | - Urpo Lamminmäki
- Department of Biochemistry/Biotechnology, University of Turku, Turku, Finland.
| | - Navin Khanna
- Recombinant Gene Products Group, International Centre for Genetic Engineering and Biotechnology, New Delhi, India.
| | - Gaurav Batra
- Centre for Biodesign and Diagnostics, Translational Health Science and Technology Institute, NCR Biotech Science Cluster, Faridabad, Haryana, India.
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Mao R, Teng D, Wang X, Zhang Y, Jiao J, Cao X, Wang J. Optimization of expression conditions for a novel NZ2114-derived antimicrobial peptide-MP1102 under the control of the GAP promoter in Pichia pastoris X-33. BMC Microbiol 2015; 15:57. [PMID: 25887810 PMCID: PMC4373065 DOI: 10.1186/s12866-015-0389-5] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2014] [Accepted: 02/18/2015] [Indexed: 01/20/2023] Open
Abstract
Background The infections caused by antibiotic multidrug-resistant bacteria seriously threaten human health. To prevent and cure the infections caused by multidrug-resistant bacteria, new antimicrobial agents are required. Antimicrobial peptides are ideal therapy candidates for antibiotic-resistant pathogens. However, due to high production costs, novel methods of large-scale production are urgently needed. Results The novel plectasin-derived antimicrobial peptide-MP1102 gene was constitutively expressed under the control of the GAP promoter. The optimum carbon source and concentration were determined, and 4% glucose (w/v) was initially selected as the best carbon source. Six media were assayed for the improved yield of recombinant MP1102 (rMP1102). The total protein and rMP1102 yield was 100.06 mg/l and 42.83 mg/l, which was accomplished via the use of medium number 1. The peptone and yeast extract from Hongrun Baoshun (HRBS, crude industrial grade, Beijing, China) more effectively improved the total protein and the yield of rMP1102 to 280.41 mg/l and 120.57 mg/l compared to 190.26 mg/l and 78.01 mg/l that resulted from Oxoid (used in the research). Furthermore, we observed that the total protein, antimicrobial activity and rMP1102 yield from the fermentation supernatant increased from 807.42 mg/l, 384,000 AU/ml, and 367.59 mg/l, respectively, in pH5.0 to 1213.64 mg/l, 153,600 AU/ml and 538.17 mg/ml, respectively in pH 6.5 in a 5-l fermenter. Accordingly, the productivity increased from 104464 AU/mg rMP1102 in pH 5.0 to a maximum of 285412 AU/mg rMP1102 in pH 6.5. Finally, the recombinant MP1102 was purified with a cation-exchange column with a yield of 376.89 mg/l, 96.8% purity, and a molecular weight of 4382.9 Da, which was consistent with its theoretical value of 4383 Da. Conclusions It’s the highest level of antimicrobial peptides expressed in Pichia pastoris using GAP promoter so far. These results provide an economical method for the high-level production of rMP1102 under the control of the GAP promoter.
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Affiliation(s)
- Ruoyu Mao
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture, 12 Zhongguancun Nandajie St., Haidian District, Beijing, 100081, P. R. China. .,Gene Engineering Laboratory, Feed Research Institute, Chinese Academy of Agricultural Sciences, 12 Zhongguancun Nandajie St., Haidian District, Beijing, 100081, P. R. China.
| | - Da Teng
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture, 12 Zhongguancun Nandajie St., Haidian District, Beijing, 100081, P. R. China. .,Gene Engineering Laboratory, Feed Research Institute, Chinese Academy of Agricultural Sciences, 12 Zhongguancun Nandajie St., Haidian District, Beijing, 100081, P. R. China.
| | - Xiumin Wang
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture, 12 Zhongguancun Nandajie St., Haidian District, Beijing, 100081, P. R. China. .,Gene Engineering Laboratory, Feed Research Institute, Chinese Academy of Agricultural Sciences, 12 Zhongguancun Nandajie St., Haidian District, Beijing, 100081, P. R. China.
| | - Yong Zhang
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture, 12 Zhongguancun Nandajie St., Haidian District, Beijing, 100081, P. R. China. .,Gene Engineering Laboratory, Feed Research Institute, Chinese Academy of Agricultural Sciences, 12 Zhongguancun Nandajie St., Haidian District, Beijing, 100081, P. R. China.
| | - Jian Jiao
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture, 12 Zhongguancun Nandajie St., Haidian District, Beijing, 100081, P. R. China. .,Gene Engineering Laboratory, Feed Research Institute, Chinese Academy of Agricultural Sciences, 12 Zhongguancun Nandajie St., Haidian District, Beijing, 100081, P. R. China.
| | - Xintao Cao
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture, 12 Zhongguancun Nandajie St., Haidian District, Beijing, 100081, P. R. China. .,Gene Engineering Laboratory, Feed Research Institute, Chinese Academy of Agricultural Sciences, 12 Zhongguancun Nandajie St., Haidian District, Beijing, 100081, P. R. China.
| | - Jianhua Wang
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture, 12 Zhongguancun Nandajie St., Haidian District, Beijing, 100081, P. R. China. .,Gene Engineering Laboratory, Feed Research Institute, Chinese Academy of Agricultural Sciences, 12 Zhongguancun Nandajie St., Haidian District, Beijing, 100081, P. R. China.
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Lee PY, Yong VC, Rosli R, Gam LH, Chong PP. Cloning, expression and purification of squalene synthase from Candida tropicalis in Pichia pastoris. Protein Expr Purif 2014; 94:15-21. [DOI: 10.1016/j.pep.2013.10.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2013] [Revised: 10/17/2013] [Accepted: 10/19/2013] [Indexed: 10/26/2022]
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9
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den Haan R, Kroukamp H, van Zyl JHD, van Zyl WH. Cellobiohydrolase secretion by yeast: Current state and prospects for improvement. Process Biochem 2013. [DOI: 10.1016/j.procbio.2012.11.015] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Yu WB, Liang X, Zhu P. High-cell-density fermentation and pilot-scale biocatalytic studies of an engineered yeast expressing the heterologous glycoside hydrolase of 7-β-xylosyltaxanes. J Ind Microbiol Biotechnol 2012. [PMID: 23179466 DOI: 10.1007/s10295-012-1212-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
The glycoside hydrolase of 7-β-xylosyltaxanes (designated as LXYL-P1-2) is encoded by Lxyl-p1-2 isolated from Lentinula edodes. This hydrolase specifically removes C-7 xylose from 7-β-xylosyltaxanes to form 7-β-hydroxyltaxanes, which can be used for the semi-synthesis of paclitaxel or its analogues. In our present study, we established a high-cell-density fermentation of the recombinant Pichia pastoris harboring the Lxyl-p1-2 gene. Moreover, we further optimized the fermentation conditions, including the initial cell density and the dissolved oxygen level in the induction phase. Under optimized conditions, the biomass of 312.3 g/l (wet cell weight, WCW) was obtained, and the biomass activity of the recombinant enzyme reached 6.55 × 10(4) U/g (WCW). The freeze-dried cells (32 g/l) were used to convert 7-β-xylosyltaxanes (10 g/l, 7-β-xylosyl-10-deacetyltaxol = 62.12 %) in a 5-l reaction volume, and a bioconversion rate about 80 % was achieved. The product purification was performed by ethyl acetate, silica gel chromatography, and preparative HPLC (prep-HPLC), yielding 15.13 g of 10-deacetyltaxol, 3.07 g of 10-deacetylcephalomanine, and 3.47 g of 10-deacetyltaxol C, respectively. In addition, the average recovery rate was around 70 %. Our work provided a foundation for the industrial utilization of the recombinant enzyme on the semi-synthesis of paclitaxel using 7-β-xylosyltaxanes.
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Affiliation(s)
- Wen-Bo Yu
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines and Ministry of Health Key Laboratory of Biosynthesis of Natural Products, Institute of Materia Medica, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100050, People's Republic of China
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Potvin G, Ahmad A, Zhang Z. Bioprocess engineering aspects of heterologous protein production in Pichia pastoris: A review. Biochem Eng J 2012. [DOI: 10.1016/j.bej.2010.07.017] [Citation(s) in RCA: 172] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Soulama I, Bigoga JD, Ndiaye M, Bougouma EC, Quagraine J, Casimiro PN, Stedman TT, Sirima SB. Genetic diversity of polymorphic vaccine candidate antigens (apical membrane antigen-1, merozoite surface protein-3, and erythrocyte binding antigen-175) in Plasmodium falciparum isolates from western and central Africa. Am J Trop Med Hyg 2011; 84:276-84. [PMID: 21292899 PMCID: PMC3029182 DOI: 10.4269/ajtmh.2011.10-0365] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The malaria vaccine candidate antigens erythrocyte binding antigen 175 (EBA-175), merozoite surface protein 3 (MSP-3), and apical membrane antigen (AMA-1) from Plasmodium falciparum isolates from countries in central and west Africa were assessed for allelic diversity. Samples were collected on filter paper from 600 P. falciparum-infected symptomatic patients in Cameroon, Republic of Congo, Burkina Faso, Ghana, and Senegal and screened for class-specific amplification fragments. Genetic diversity, assessed by mean heterozygosity, was comparable among countries. We detected a clinical increase in eba 175 F-allele frequency from west to east across the study region. No statistical difference in msp-3 allele distribution between countries was observed. The ama-1 3D7 alleles were present at a lower frequency in central Africa than in West Africa. We also detected little to no genetic differentiation among sampling locations. This finding indicates that, at least at the level of resolution offered by restriction fragment length polymorphism analysis, these antigens showed remarkable genetic homogeneity throughout the region sampled, perhaps caused by balancing selection to maintain a diverse array of antigen haplotyes.
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Affiliation(s)
- Issiaka Soulama
- Centre National de Recherche et de Formation sur le Paludisme, Ouagadougou, Burkina Faso.
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Pal Khasa Y, Conrad S, Sengul M, Plautz S, Meagher MM, Inan M. Isolation of Pichia pastoris PIR genes and their utilization for cell surface display and recombinant protein secretion. Yeast 2010; 28:213-26. [DOI: 10.1002/yea.1832] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2010] [Accepted: 11/07/2010] [Indexed: 11/08/2022] Open
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Batra G, Gurramkonda C, Nemani SK, Jain SK, Swaminathan S, Khanna N. Optimization of conditions for secretion of dengue virus type 2 envelope domain III using Pichia pastoris. J Biosci Bioeng 2010; 110:408-14. [DOI: 10.1016/j.jbiosc.2010.05.001] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2009] [Revised: 04/25/2010] [Accepted: 05/01/2010] [Indexed: 01/06/2023]
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Satakarni M, Koutinas AA, Webb C, Curtis R. Enrichment of fermentation media and optimization of expression conditions for the production of EAK(16) peptide as fusions with SUMO. Biotechnol Bioeng 2009; 102:725-35. [PMID: 18973282 DOI: 10.1002/bit.22114] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
EAK(16) (AEAEAKAKAEAKAEAK) belongs to a novel class of self-assembling peptides, which is being investigated in research and industry. SUMO belongs to the ubiquitin class of proteins and is a promising fusion partner currently in use. In this study, EAK(16) peptide fusions with hexa-histidine tagged SUMO have been constructed using Escherichia coli based pET expression vector. Intracellular expression of the SUMO-EAK(16) fusion using LB media has been optimized. Low-cost complex media (fungal autolysates, wheat and gluten hydrolysates) produced via a novel wheat-based biorefinery have been used as alternative fermentation media to LB. Shake flask cultures using either enriched LB or complex wheat-derived media containing 2 g/L of glucose resulted in intracellular SUMO-EAK(16) fusion protein production of approximately 250 mg/L fermentation volume which corresponded to 30-35% of the total bacterial protein expressed being the fusion protein. Fusion protein productivities up to five times higher were achieved when using a bioreactor.
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Affiliation(s)
- Makkapati Satakarni
- School of Chemical Engineering and Analytical Science, The University of Manchester, PO Box 88, Manchester M601QD, United Kingdom
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16
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Dextran sodium sulfate enhances secretion of recombinant human transferrin in Schizosaccharomyces pombe. Appl Microbiol Biotechnol 2009; 85:155-64. [DOI: 10.1007/s00253-009-2130-5] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2009] [Revised: 07/04/2009] [Accepted: 07/06/2009] [Indexed: 11/26/2022]
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17
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Schmidt SA, Tan EL, Brown S, Nasution UJ, Pettolino F, Macintyre OJ, Lopes MDB, Waters EJ, Anderson PA. Hpf2 glycan structure is critical for protection against protein haze formation in white wine. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2009; 57:3308-3315. [PMID: 19301818 DOI: 10.1021/jf803254s] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Grape-derived proteins can form haze in wine. Some cell-wall glycoproteins of Saccharomyces cerevisiae are capable of reducing protein haze formation. The basis of their haze protective activity is not yet understood. One of the S. cerevisiae cell-wall proteins, Hpf2, was produced in Pichia pastoris . An altered glycan structure in the P. pastoris -produced protein was associated with decreased solubility in water and reduced capacity to mitigate haze formation compared to native Hpf2 protein from S. cerevisiae. alpha-1,2-Linked mannose in the glycan chain was shown to be required for haze protective activity using a series of S. cerevisiae deletion mutants (mnn1-Delta, mnn2-Delta, mnn4-Delta, and mnn5-Delta), defective in different aspects of glycan processing. The effect of media additives phthalate, casamino acids, and yeast nitrogen base on Hpf2 production in P. pastoris were also evaluated. Casamino acids were shown to suppress Hpf2 production in P. pastoris .
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Affiliation(s)
- Simon A Schmidt
- The Australian Wine Research Institute, Glen Osmond 5064, South Australia, Australia.
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Zhao HL, Xue C, Wang Y, Yao XQ, Liu ZM. Increasing the cell viability and heterologous protein expression of Pichia pastoris mutant deficient in PMR1 gene by culture condition optimization. Appl Microbiol Biotechnol 2008; 81:235-41. [DOI: 10.1007/s00253-008-1666-0] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2008] [Revised: 08/08/2008] [Accepted: 08/09/2008] [Indexed: 11/24/2022]
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Heterologous expression of plasmodial proteins for structural studies and functional annotation. Malar J 2008; 7:197. [PMID: 18828893 PMCID: PMC2567985 DOI: 10.1186/1475-2875-7-197] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2008] [Accepted: 10/01/2008] [Indexed: 11/10/2022] Open
Abstract
Malaria remains the world's most devastating tropical infectious disease with as many as 40% of the world population living in risk areas. The widespread resistance of Plasmodium parasites to the cost-effective chloroquine and antifolates has forced the introduction of more costly drug combinations, such as Coartem®. In the absence of a vaccine in the foreseeable future, one strategy to address the growing malaria problem is to identify and characterize new and durable antimalarial drug targets, the majority of which are parasite proteins. Biochemical and structure-activity analysis of these proteins is ultimately essential in the characterization of such targets but requires large amounts of functional protein. Even though heterologous protein production has now become a relatively routine endeavour for most proteins of diverse origins, the functional expression of soluble plasmodial proteins is highly problematic and slows the progress of antimalarial drug target discovery. Here the status quo of heterologous production of plasmodial proteins is presented, constraints are highlighted and alternative strategies and hosts for functional expression and annotation of plasmodial proteins are reviewed.
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Tolner B, Smith L, Begent RHJ, Chester KA. Production of recombinant protein in Pichia pastoris by fermentation. Nat Protoc 2007; 1:1006-21. [PMID: 17406338 DOI: 10.1038/nprot.2006.126] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
This protocol is applicable to recombinant protein expression by small-scale fermentation using the Pichia pastoris expression system. P. pastoris has the capacity to produce large quantities of protein with eukaryotic processing. Expression is controlled by a methanol-inducible promoter, which allows a biomass-generation phase before protein production is initiated. The target protein is secreted directly into a protein-free mineral salt medium, and is relatively easy to purify. The protocol is readily interfaced with expanded bed adsorption for immediate capture and purification of recombinant protein. The setting up of the bioreactor plus the fermentation itself takes 1 wk. Making the master and user seed lots takes approximately 2 wk for each individual clone.
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Affiliation(s)
- Berend Tolner
- Department of Oncology, Royal Free and University College Medical School, University College London, Rowland Hill Street, London NW3 2PF, UK.
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