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Jankowski N, Koschorreck K. Agar plate assay for rapid screening of aryl-alcohol oxidase mutant libraries in Pichia pastoris. J Biotechnol 2022; 346:47-51. [PMID: 35122934 DOI: 10.1016/j.jbiotec.2022.01.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 01/17/2022] [Accepted: 01/30/2022] [Indexed: 11/16/2022]
Abstract
Directed evolution is a powerful tool for developing biocatalysts with tailor-made properties for biocatalytic applications. High-throughput activity screening of large mutant libraries generated by e.g. means of directed evolution is usually performed in 96-well microtiter plates requiring, however, time-consuming and laborious enzyme expression, cell harvesting and activity measurements. In addition, automated liquid handling systems are needed to cope with the high number of colonies to be screened. Herein, we developed an agar plate-based assay for simple and fast screening of H2O2-producing aryl-alcohol oxidase (AAO) mutant libraries in Pichia pastoris. Buffered minimal methanol agar plates were supplemented with 2,2'-azino-bis(3-ethylbenzthiazoline-6-sulfonic acid) (ABTS), horseradish peroxidase (HRP) and the target substrate. AAO activity is visualized by formation of green zones around AAO-secreting P. pastoris colonies due to ABTS oxidation by HRP which is fueled with H2O2 by AAO in course of substrate oxidation. Colonies were screened within 24h for AAO activity using different AAO substrates like veratryl alcohol, p-anisyl alcohol or trans,trans-2,4-hexadien-1-ol and even low AAO activity towards 5-hydroxymethylfurfural could be detected within 48h. The developed agar plate-based assay can be extended to other substrates and might also be applied for fast and substrate-specific screening of other H2O2-producing oxidases in P. pastoris.
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Affiliation(s)
- Nina Jankowski
- Institute of Biochemistry, Heinrich-Heine University Düsseldorf, Universitätsstraße 1, 40225 Düsseldorf, Germany
| | - Katja Koschorreck
- Institute of Biochemistry, Heinrich-Heine University Düsseldorf, Universitätsstraße 1, 40225 Düsseldorf, Germany.
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Jia L, Rao S, Li H, Wu C, Wang Q, Li T, Huang A. Enhancing HSA-GCSFm fusion protein production by Pichia pastoris with an on-line model-based exponential and DO-stat control modes. Biochem Eng J 2022. [DOI: 10.1016/j.bej.2021.108262] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Ribeaucourt D, Bissaro B, Lambert F, Lafond M, Berrin JG. Biocatalytic oxidation of fatty alcohols into aldehydes for the flavors and fragrances industry. Biotechnol Adv 2021; 56:107787. [PMID: 34147589 DOI: 10.1016/j.biotechadv.2021.107787] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Revised: 06/13/2021] [Accepted: 06/15/2021] [Indexed: 01/11/2023]
Abstract
From Egyptian mummies to the Chanel n°5 perfume, fatty aldehydes have long been used and keep impacting our senses in a wide range of foods, beverages and perfumes. Natural sources of fatty aldehydes are threatened by qualitative and quantitative variability while traditional chemical routes are insufficient to answer the society shift toward more sustainable and natural products. The production of fatty aldehydes using biotechnologies is therefore the most promising alternative for the flavors and fragrances industry. In this review, after drawing the portrait of the origin and characteristics of fragrant fatty aldehydes, we present the three main classes of enzymes that catalyze the reaction of fatty alcohols oxidation into aldehydes, namely alcohol dehydrogenases, flavin-dependent alcohol oxidases and copper radical alcohol oxidases. The constraints, challenges and opportunities to implement these oxidative enzymes in the flavors and fragrances industry are then discussed. By setting the scene on the biocatalytic production of fatty aldehydes, and providing a critical assessment of its potential, we expect this review to contribute to the development of biotechnology-based solutions in the flavors and fragrances industry.
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Affiliation(s)
- David Ribeaucourt
- INRAE, Aix Marseille Univ, UMR1163 Biodiversité et Biotechnologie Fongiques, 13009 Marseille, France; V. Mane Fils, 620 route de Grasse, 06620 Le Bar sur Loup, France; Aix Marseille Univ, CNRS, Centrale Marseille, iSm2, Marseille, France.
| | - Bastien Bissaro
- INRAE, Aix Marseille Univ, UMR1163 Biodiversité et Biotechnologie Fongiques, 13009 Marseille, France
| | - Fanny Lambert
- V. Mane Fils, 620 route de Grasse, 06620 Le Bar sur Loup, France
| | - Mickael Lafond
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2, Marseille, France
| | - Jean-Guy Berrin
- INRAE, Aix Marseille Univ, UMR1163 Biodiversité et Biotechnologie Fongiques, 13009 Marseille, France.
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4
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Adivitiya, Babbal, Mohanty S, Khasa YP. Nitrogen supplementation ameliorates product quality and quantity during high cell density bioreactor studies of Pichia pastoris: A case study with proteolysis prone streptokinase. Int J Biol Macromol 2021; 180:760-770. [PMID: 33716129 DOI: 10.1016/j.ijbiomac.2021.03.021] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2020] [Revised: 02/25/2021] [Accepted: 03/03/2021] [Indexed: 10/21/2022]
Abstract
Streptokinase is a well-established cost-effective therapeutic molecule for thrombo-embolic complications. In the current study, a tag-free variant of streptokinase with a native N-terminus (N-rSK) was developed using the Pichia expression system. A three-copy clone was screened that secreted 1062 mg/L of N-rSK in the complex medium at shake flask level. The biologically active (67,552.61 IU/mg) N-rSK recovered by anion exchange chromatography was predicted to contain 15.43% α-helices, 26.43% β-sheets. The fermentation run in a complex medium yielded a poor quality product due to excessive N-rSK degradation. Therefore, modified basal salt medium was also employed during fermentation operations to reduce the proteolytic processing of the recombinant product. The concomitant feeding of 1 g/L/h soya flour hydrolysate with methanol during the protein synthesis phase reduced the proteolysis and yielded 2.29 g/L of N-rSK. The fermentation medium was also supplemented with urea during growth and induction phases. The combined feeding approach of nitrogen-rich soya flour hydrolysate and urea during bioreactor operations showed significant improvement in protein stability and resulted in a 4-fold increase in N-rSK concentration to a level of 4.03 g/L over shake flask. Under optimized conditions, the volumetric productivity and specific product yield were 52.33 mg/L/h and 33.24 mg/g DCW, respectively.
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Affiliation(s)
- Adivitiya
- Department of Microbiology, University of Delhi South Campus, New Delhi 110021, India
| | - Babbal
- Department of Microbiology, University of Delhi South Campus, New Delhi 110021, India
| | - Shilpa Mohanty
- Department of Microbiology, University of Delhi South Campus, New Delhi 110021, India
| | - Yogender Pal Khasa
- Department of Microbiology, University of Delhi South Campus, New Delhi 110021, India.
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5
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Velez‐Suberbie ML, Morris SA, Kaur K, Hickey JM, Joshi SB, Volkin DB, Bracewell DG, Mukhopadhyay TK. Holistic process development to mitigate proteolysis of a subunit rotavirus vaccine candidate produced in Pichia pastoris by means of an acid pH pulse during fed-batch fermentation. Biotechnol Prog 2020; 36:e2966. [PMID: 31960616 PMCID: PMC7317458 DOI: 10.1002/btpr.2966] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Revised: 01/14/2020] [Accepted: 01/16/2020] [Indexed: 11/09/2022]
Abstract
To meet the challenges of global health, vaccine design and development must be reconsidered to achieve cost of goods as low as 15¢ per dose. A new recombinant protein-based rotavirus vaccine candidate derived from non-replicative viral subunits fused to a P2 tetanus toxoid CD4(+) T cell epitope is currently under clinical development. We have sought to simplify the existing manufacturing process to meet these aims. To this end, we have taken a holistic process development approach to reduce process complexity and costs while producing a product with the required characteristics. We have changed expression system from Escherichia coli to Pichia pastoris, to produce a secreted product, thereby reducing the number of purification steps. However, the presence of proteases poses challenges to product quality. To understand the effect of fermentation parameters on product quality small-scale fermentations were carried out. Media pH and fermentation duration had the greatest impact on the proportion of full-length product. A novel acidic pH pulse strategy was used to minimize proteolysis, and this combined with an early harvest time significantly increased the proportion of full-length material (60-75%). An improved downstream process using a combination of CIEX and AIEX to further reduce proteases, resulted in maintaining product quality (95% yield).
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Affiliation(s)
| | - Stephen A. Morris
- Department of Biochemical EngineeringUniversity College LondonLondonUnited Kingdom
| | - Kawaljit Kaur
- Department of Pharmaceutical Chemistry, Vaccine Analytics and Formulation CenterUniversity of KansasLawrenceKansas
| | - John M. Hickey
- Department of Pharmaceutical Chemistry, Vaccine Analytics and Formulation CenterUniversity of KansasLawrenceKansas
| | - Sangeeta B. Joshi
- Department of Pharmaceutical Chemistry, Vaccine Analytics and Formulation CenterUniversity of KansasLawrenceKansas
| | - David B. Volkin
- Department of Pharmaceutical Chemistry, Vaccine Analytics and Formulation CenterUniversity of KansasLawrenceKansas
| | - Daniel G. Bracewell
- Department of Biochemical EngineeringUniversity College LondonLondonUnited Kingdom
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Mathieu Y, Offen WA, Forget SM, Ciano L, Viborg AH, Blagova E, Henrissat B, Walton PH, Davies GJ, Brumer H. Discovery of a Fungal Copper Radical Oxidase with High Catalytic Efficiency toward 5-Hydroxymethylfurfural and Benzyl Alcohols for Bioprocessing. ACS Catal 2020. [DOI: 10.1021/acscatal.9b04727] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Yann Mathieu
- Michael Smith Laboratories, University of British Columbia, 2185 East Mall, Vancouver, British Columbia V6T 1Z4, Canada
| | - Wendy A. Offen
- Department of Chemistry, University of York, Heslington, YO10 5DD, York, U.K
| | - Stephanie M. Forget
- Michael Smith Laboratories, University of British Columbia, 2185 East Mall, Vancouver, British Columbia V6T 1Z4, Canada
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
| | - Luisa Ciano
- Department of Chemistry, University of York, Heslington, YO10 5DD, York, U.K
| | - Alexander Holm Viborg
- Michael Smith Laboratories, University of British Columbia, 2185 East Mall, Vancouver, British Columbia V6T 1Z4, Canada
| | - Elena Blagova
- Department of Chemistry, University of York, Heslington, YO10 5DD, York, U.K
| | - Bernard Henrissat
- Architecture et Fonction des Macromolécules Biologiques (AFMB), CNRS, Aix-Marseille University, Marseille, 13288, France
- INRA, USC1408 Architecture et Fonction des Macromolécules Biologiques (AFMB), Marseille, 13288, France
| | - Paul H. Walton
- Department of Chemistry, University of York, Heslington, YO10 5DD, York, U.K
| | - Gideon J. Davies
- Department of Chemistry, University of York, Heslington, YO10 5DD, York, U.K
| | - Harry Brumer
- Michael Smith Laboratories, University of British Columbia, 2185 East Mall, Vancouver, British Columbia V6T 1Z4, Canada
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
- Department of Biochemistry and Molecular Biology, University of British Columbia, 2350 Health Sciences Mall, Vancouver, British Columbia V6T 1Z3, Canada
- Department of Botany, University of British Columbia, 3200 University Boulevard, Vancouver, British Columbia V6T 1Z4, Canada
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Hassan SWM, Abd El Latif HH, Ali SM. Production of Cold-Active Lipase by Free and Immobilized Marine Bacillus cereus HSS: Application in Wastewater Treatment. Front Microbiol 2018; 9:2377. [PMID: 30405541 PMCID: PMC6205956 DOI: 10.3389/fmicb.2018.02377] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Accepted: 09/18/2018] [Indexed: 12/28/2022] Open
Abstract
Lipases are enzymes that have the potential to hydrolyze triacylglycerol to free fatty acids and glycerol and have various applications. The aim of the present study was to isolate and screen marine bacteria for lipase production, optimize the production, and treat wastewater. A total of 20 marine bacterial isolates were obtained from the Mediterranean Sea and were screened for lipase production. All isolates were found to have lipolytic ability. The differences between the isolates were studied using RAPD-PCR. The most promising lipase producer (isolate 3) that exhibited the highest lipolytic hydrolysis (20 mm) was identified as Bacillus cereus HSS using 16S rDNA analysis and had the accession number MF581790. Optimization of lipase production was carried out using the Plackett-Burman experimental design with cotton seed oil as the inducer under shaking conditions at 10°C. The most significant factors that affected lipase production were FeSO4, KCl, and oil concentrations. By using the optimized culture conditions, the lipase activity increased by 1.8-fold compared with basal conditions. Immobilization by adsorption of cells on sponge and recycling raised lipase activity by 2.8-fold compared with free cells. The repeated reuse of the immobilized B. cereus HSS maintained reasonable lipase activity. A trial for the economic treatment of oily wastewater was carried out. Removal efficiencies of biological oxygen demand, total suspended solids, and oil and grease were 87.63, 90, and 94.7%, respectively, which is promising for future applications.
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Affiliation(s)
| | | | - Safaa M. Ali
- City of Scientific Research and Technological Applications, Alexandria, Egypt
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Zhu W, Gong G, Pan J, Han S, Zhang W, Hu Y, Xie L. High level expression and purification of recombinant human serum albumin in Pichia pastoris. Protein Expr Purif 2018. [DOI: 10.1016/j.pep.2018.02.003] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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9
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Raschmanová H, Paulová L, Branská B, Knejzlík Z, Melzoch K, Kovar K. Production and cleavage of a fusion protein of porcine trypsinogen and enhanced green fluorescent protein (EGFP) in Pichia pastoris. Folia Microbiol (Praha) 2018; 63:773-787. [DOI: 10.1007/s12223-018-0619-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2017] [Accepted: 05/23/2018] [Indexed: 10/14/2022]
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Engineering strategies for enhanced production of protein and bio-products in Pichia pastoris: A review. Biotechnol Adv 2017; 36:182-195. [PMID: 29129652 DOI: 10.1016/j.biotechadv.2017.11.002] [Citation(s) in RCA: 225] [Impact Index Per Article: 32.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2017] [Revised: 10/16/2017] [Accepted: 11/06/2017] [Indexed: 11/24/2022]
Abstract
Pichia pastoris has been recognized as one of the most industrially important hosts for heterologous protein production. Despite its high protein productivity, the optimization of P. pastoris cultivation is still imperative due to strain- and product-specific challenges such as promoter strength, methanol utilization type and oxygen demand. To address the issues, strategies involving genetic and process engineering have been employed. Optimization of codon usage and gene dosage, as well as engineering of promoters, protein secretion pathways and methanol metabolic pathways have proved beneficial to innate protein expression levels. Large-scale production of proteins via high cell density fermentation additionally relies on the optimization of process parameters including methanol feed rate, induction temperature and specific growth rate. Recent progress related to the enhanced production of proteins in P. pastoris via various genetic engineering and cultivation strategies are reviewed. Insight into the regulation of the P. pastoris alcohol oxidase 1 (AOX1) promoter and the development of methanol-free systems are highlighted. Novel cultivation strategies such as mixed substrate feeding are discussed. Recent advances regarding substrate and product monitoring techniques are also summarized. Application of P. pastoris to the production of biodiesel and other value-added products via metabolic engineering are also reviewed. P. pastoris is becoming an indispensable platform through the use of these combined engineering strategies.
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A Novel Colletotrichum graminicola Raffinose Oxidase in the AA5 Family. Appl Environ Microbiol 2017; 83:AEM.01383-17. [PMID: 28778886 DOI: 10.1128/aem.01383-17] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Accepted: 07/24/2017] [Indexed: 12/17/2022] Open
Abstract
We describe here the identification and characterization of a copper radical oxidase from auxiliary activities family 5 (AA5_2) that was distinguished by showing preferential activity toward raffinose. Despite the biotechnological potential of carbohydrate oxidases from family AA5, very few members have been characterized. The gene encoding raffinose oxidase from Colletotrichum graminicola (CgRaOx; EC 1.1.3.-) was identified utilizing a bioinformatics approach based on the known modular structure of a characterized AA5_2 galactose oxidase. CgRaOx was expressed in Pichia pastoris, and the purified enzyme displayed the highest activity on the trisaccharide raffinose, whereas the activity on the disaccharide melibiose was three times lower and more than ten times lower activity was detected on d-galactose at a 300 mM substrate concentration. Thus, the substrate preference of CgRaOx was distinguished clearly from the substrate preferences of the known galactose oxidases. The site of oxidation for raffinose was studied by 1H nuclear magnetic resonance and mass spectrometry, and we confirmed that the hydroxyl group at the C-6 position was oxidized to an aldehyde and that in addition uronic acid was produced as a side product. A new electrospray ionization mass spectrometry method for the identification of C-6 oxidized products was developed, and the formation mechanism of the uronic acid was studied. CgRaOx presented a novel activity pattern in the AA5 family.IMPORTANCE Currently, there are only a few characterized members of the CAZy AA5 protein family. These enzymes are interesting from an application point of view because of their ability to utilize the cheap and abundant oxidant O2 without the requirement of complex cofactors such as FAD or NAD(P). Here, we present the identification and characterization of a novel AA5 member from Colletotrichum graminicola As discussed in the present study, the bioinformatics approach using the modular structure of galactose oxidase was successful in finding a C-6 hydroxyl carbohydrate oxidase having substrate preference for the trisaccharide raffinose. By the discovery of this activity, the diversity of the CAZy AA5 family is increasing.
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Adelantado N, Tarazona P, Grillitsch K, García-Ortega X, Monforte S, Valero F, Feussner I, Daum G, Ferrer P. The effect of hypoxia on the lipidome of recombinant Pichia pastoris. Microb Cell Fact 2017; 16:86. [PMID: 28526017 PMCID: PMC5437588 DOI: 10.1186/s12934-017-0699-4] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Accepted: 05/10/2017] [Indexed: 01/17/2023] Open
Abstract
Background Cultivation of recombinant Pichia pastoris (Komagataella sp.) under hypoxic conditions has a strong positive effect on specific productivity when the glycolytic GAP promoter is used for recombinant protein expression, mainly due to upregulation of glycolytic conditions. In addition, transcriptomic analyses of hypoxic P. pastoris pointed out important regulation of lipid metabolism and unfolded protein response (UPR). Notably, UPR that plays a role in the regulation of lipid metabolism, amino acid metabolism and protein secretion, was found to be upregulated under hypoxia. Results To improve our understanding of the interplay between lipid metabolism, UPR and protein secretion, the lipidome of a P. pastoris strain producing an antibody fragment was studied under hypoxic conditions. Furthermore, lipid composition analyses were combined with previously available transcriptomic datasets to further understand the impact of hypoxia on lipid metabolism. Chemostat cultures operated under glucose-limiting conditions under normoxic and hypoxic conditions were analyzed in terms of intra/extracellular product distribution and lipid composition. Integrated analysis of lipidome and transcriptome datasets allowed us to demonstrate an important remodeling of the lipid metabolism under limited oxygen availability. Additionally, cells with reduced amounts of ergosterol through fluconazole treatment were also included in the study to observe the impact on protein secretion and its lipid composition. Conclusions Our results show that cells adjust their membrane composition in response to oxygen limitation mainly by changing their sterol and sphingolipid composition. Although fluconazole treatment results a different lipidome profile than hypoxia, both conditions result in higher recombinant protein secretion levels. Electronic supplementary material The online version of this article (doi:10.1186/s12934-017-0699-4) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Núria Adelantado
- Department of Chemical, Biological and Environmental Engineering, Escola d'Enginyeria, Universitat Autònoma de Barcelona, Bellaterra, 08193, Barcelona, Catalonia, Spain.,Evonik Nutrition & Care GmbH, Hanau, Germany
| | - Pablo Tarazona
- Department of Plant Biochemistry, Albrecht-von-Haller-Institute for Plant Sciences, Georg-August-University, Justus-von-Liebig-Weg 11, 37077, Göttingen, Germany
| | - Karlheinz Grillitsch
- Austrian Centre of Industrial Biotechnology (ACIB), Graz, Austria.,Institute of Biochemistry, Graz University of Technology, Petersgasse 12/II, 8010, Graz, Austria
| | - Xavier García-Ortega
- Department of Chemical, Biological and Environmental Engineering, Escola d'Enginyeria, Universitat Autònoma de Barcelona, Bellaterra, 08193, Barcelona, Catalonia, Spain
| | - Sergi Monforte
- Department of Chemical, Biological and Environmental Engineering, Escola d'Enginyeria, Universitat Autònoma de Barcelona, Bellaterra, 08193, Barcelona, Catalonia, Spain
| | - Francisco Valero
- Department of Chemical, Biological and Environmental Engineering, Escola d'Enginyeria, Universitat Autònoma de Barcelona, Bellaterra, 08193, Barcelona, Catalonia, Spain
| | - Ivo Feussner
- Department of Plant Biochemistry, Albrecht-von-Haller-Institute for Plant Sciences, Georg-August-University, Justus-von-Liebig-Weg 11, 37077, Göttingen, Germany.,Department of Plant Biochemistry, Göttingen Center for Molecular Biosciences (GZMB), Georg-August-University, Justus-von-Liebig-Weg 11, 37077, Göttingen, Germany
| | - Günther Daum
- Austrian Centre of Industrial Biotechnology (ACIB), Graz, Austria. .,Institute of Biochemistry, Graz University of Technology, Petersgasse 12/II, 8010, Graz, Austria.
| | - Pau Ferrer
- Department of Chemical, Biological and Environmental Engineering, Escola d'Enginyeria, Universitat Autònoma de Barcelona, Bellaterra, 08193, Barcelona, Catalonia, Spain
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Efficient extracellular expression of transpeptidase sortase A in Pichia pastoris. Protein Expr Purif 2017; 133:132-138. [DOI: 10.1016/j.pep.2017.03.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2016] [Revised: 02/28/2017] [Accepted: 03/13/2017] [Indexed: 11/21/2022]
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14
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Su L, Ji D, Tao X, Yu L, Wu J, Xia Y. Recombinant expression, characterization, and application of a phospholipase B from Fusarium oxysporum. J Biotechnol 2017; 242:92-100. [DOI: 10.1016/j.jbiotec.2016.12.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Revised: 11/20/2016] [Accepted: 12/07/2016] [Indexed: 02/06/2023]
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15
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Enhancing production of lipase MAS1 from marine Streptomyces sp. strain in Pichia pastoris by chaperones co-expression. ELECTRON J BIOTECHN 2016. [DOI: 10.1016/j.ejbt.2016.06.003] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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16
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Luley-Goedl C, Czabany T, Longus K, Schmölzer K, Zitzenbacher S, Ribitsch D, Schwab H, Nidetzky B. Combining expression and process engineering for high-quality production of human sialyltransferase in Pichia pastoris. J Biotechnol 2016; 235:54-60. [PMID: 27018228 DOI: 10.1016/j.jbiotec.2016.03.046] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Revised: 03/23/2016] [Accepted: 03/24/2016] [Indexed: 11/18/2022]
Abstract
The human β-galactoside α2,6-sialyltransferase I, ST6Gal-I has drawn considerable interest for its use as biocatalyst for in-vitro glycoengineering of recombinantly produced therapeutic proteins. By attaching sialic acid onto the terminal galactoses of biantennary protein N-glycans, ST6Gal-I facilitates protein remodeling towards a humanized glycosylation and thus optimized efficacy in pharmacological use. Secreted expression of ST6Gal-I in Pichia pastoris is promising, but proteolysis restricts both the yield and the quality of the enzyme produced. Focusing on an N-terminally truncated (Δ108) variant of ST6Gal-I previously shown to represent a minimally sized, still active form of ST6Gal-I, we show here that protein expression engineering and optimization of bioreactor cultivation of P. pastoris KM71H (pPICZαB) synergized to enhance the maximum enzyme titer about 57-fold to 17units/L. N-Terminal fusion to the Flag-tag plus deletion of a potential proteolytic site (Lys(114)-Asn→Gln(114)-Asn) improved the intrinsic resistance of Δ108ST6Gal-I to degradation in P. pastoris culture. A mixed glycerol/methanol feeding protocol for P. pastoris growth and induction was key for enzyme production in high yield and quality. The sialyltransferase was recovered from the bioreactor culture in a yield of 70% using a single step of anion-exchange chromatography. Its specific activity was 0.05units/mg protein.
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Affiliation(s)
| | - Tibor Czabany
- Institute of Biotechnology and Biochemical Engineering, Graz University of Technology, Petersgasse 12/I, 8010 Graz, Austria
| | - Karin Longus
- Institute of Biotechnology and Biochemical Engineering, Graz University of Technology, Petersgasse 12/I, 8010 Graz, Austria
| | - Katharina Schmölzer
- Austrian Center of Industrial Biotechnology, Petersgasse 14, 8010 Graz, Austria
| | - Sabine Zitzenbacher
- Austrian Center of Industrial Biotechnology, Petersgasse 14, 8010 Graz, Austria
| | - Doris Ribitsch
- Austrian Center of Industrial Biotechnology, Petersgasse 14, 8010 Graz, Austria
| | - Helmut Schwab
- Institute of Molecular Biotechnology, Graz University of Technology, Petersgasse 14, 8010 Graz, Austria
| | - Bernd Nidetzky
- Austrian Center of Industrial Biotechnology, Petersgasse 14, 8010 Graz, Austria; Institute of Biotechnology and Biochemical Engineering, Graz University of Technology, Petersgasse 12/I, 8010 Graz, Austria.
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McKee LS, Sunner H, Anasontzis GE, Toriz G, Gatenholm P, Bulone V, Vilaplana F, Olsson L. A GH115 α-glucuronidase from Schizophyllum commune contributes to the synergistic enzymatic deconstruction of softwood glucuronoarabinoxylan. BIOTECHNOLOGY FOR BIOFUELS 2016; 9:2. [PMID: 26734072 PMCID: PMC4700659 DOI: 10.1186/s13068-015-0417-6] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2015] [Accepted: 12/15/2015] [Indexed: 05/11/2023]
Abstract
BACKGROUND Lignocellulosic biomass from softwood represents a valuable resource for the production of biofuels and bio-based materials as alternatives to traditional pulp and paper products. Hemicelluloses constitute an extremely heterogeneous fraction of the plant cell wall, as their molecular structures involve multiple monosaccharide components, glycosidic linkages, and decoration patterns. The complete enzymatic hydrolysis of wood hemicelluloses into monosaccharides is therefore a complex biochemical process that requires the activities of multiple degradative enzymes with complementary activities tailored to the structural features of a particular substrate. Glucuronoarabinoxylan (GAX) is a major hemicellulose component in softwood, and its structural complexity requires more enzyme specificities to achieve complete hydrolysis compared to glucuronoxylans from hardwood and arabinoxylans from grasses. RESULTS We report the characterisation of a recombinant α-glucuronidase (Agu115) from Schizophyllum commune capable of removing (4-O-methyl)-glucuronic acid ((Me)GlcA) residues from polymeric and oligomeric xylan. The enzyme is required for the complete deconstruction of spruce glucuronoarabinoxylan (GAX) and acts synergistically with other xylan-degrading enzymes, specifically a xylanase (Xyn10C), an α-l-arabinofuranosidase (AbfA), and a β-xylosidase (XynB). Each enzyme in this mixture showed varying degrees of potentiation by the other activities, likely due to increased physical access to their respective target monosaccharides. The exo-acting Agu115 and AbfA were unable to remove all of their respective target side chain decorations from GAX, but their specific activity was significantly boosted by the addition of the endo-Xyn10C xylanase. We demonstrate that the proposed enzymatic cocktail (Agu115 with AbfA, Xyn10C and XynB) achieved almost complete conversion of GAX to arabinofuranose (Araf), xylopyranose (Xylp), and MeGlcA monosaccharides. Addition of Agu115 to the enzymatic cocktail contributes specifically to 25 % of the conversion. However, traces of residual oligosaccharides resistant to this combination of enzymes were still present after deconstruction, due to steric hindrances to enzyme access to the substrate. CONCLUSIONS Our GH115 α-glucuronidase is capable of finely tailoring the molecular structure of softwood GAX, and contributes to the almost complete saccharification of GAX in synergy with other exo- and endo-xylan-acting enzymes. This has great relevance for the cost-efficient production of biofuels from softwood lignocellulose.
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Affiliation(s)
- Lauren S. McKee
- />Wallenberg Wood Science Centre, Division of Glycoscience, School of Biotechnology, KTH Royal Institute of Technology, AlbaNova University Centre, 106 91 Stockholm, Sweden
| | - Hampus Sunner
- />Wallenberg Wood Science Centre, Division of Industrial Biotechnology, Department of Biology and Biological Engineering, Chalmers University of Technology, 412 96 Gothenburg, Sweden
| | - George E. Anasontzis
- />Wallenberg Wood Science Centre, Division of Industrial Biotechnology, Department of Biology and Biological Engineering, Chalmers University of Technology, 412 96 Gothenburg, Sweden
| | - Guillermo Toriz
- />Wallenberg Wood Science Centre, Department of Chemistry and Chemical Engineering, Chalmers University of Technology, 412 96 Gothenburg, Sweden
- />Department of Wood, Cellulose and Paper Research, University of Guadalajara, Guadalajara, Mexico
| | - Paul Gatenholm
- />Wallenberg Wood Science Centre, Department of Chemistry and Chemical Engineering, Chalmers University of Technology, 412 96 Gothenburg, Sweden
| | - Vincent Bulone
- />Wallenberg Wood Science Centre, Division of Glycoscience, School of Biotechnology, KTH Royal Institute of Technology, AlbaNova University Centre, 106 91 Stockholm, Sweden
- />ARC Centre of Excellence in Plant Cell Walls and School of Agriculture, Food and Wine, The University of Adelaide, Waite Campus, Urrbrae, SA 5064 Australia
| | - Francisco Vilaplana
- />Wallenberg Wood Science Centre, Division of Glycoscience, School of Biotechnology, KTH Royal Institute of Technology, AlbaNova University Centre, 106 91 Stockholm, Sweden
| | - Lisbeth Olsson
- />Wallenberg Wood Science Centre, Division of Industrial Biotechnology, Department of Biology and Biological Engineering, Chalmers University of Technology, 412 96 Gothenburg, Sweden
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Lopes AM, Oliveira-Nascimento LD, Ribeiro A, Tairum CA, Breyer CA, Oliveira MAD, Monteiro G, Souza-Motta CMD, Magalhães PDO, Avendaño JGF, Cavaco-Paulo AM, Mazzola PG, Rangel-Yagui CDO, Sette LD, Converti A, Pessoa A. Therapeuticl-asparaginase: upstream, downstream and beyond. Crit Rev Biotechnol 2015; 37:82-99. [DOI: 10.3109/07388551.2015.1120705] [Citation(s) in RCA: 85] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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19
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Yin DT, Urresti S, Lafond M, Johnston EM, Derikvand F, Ciano L, Berrin JG, Henrissat B, Walton PH, Davies GJ, Brumer H. Structure-function characterization reveals new catalytic diversity in the galactose oxidase and glyoxal oxidase family. Nat Commun 2015; 6:10197. [PMID: 26680532 PMCID: PMC4703870 DOI: 10.1038/ncomms10197] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Accepted: 11/16/2015] [Indexed: 11/09/2022] Open
Abstract
Alcohol oxidases, including carbohydrate oxidases, have a long history of research that has generated fundamental biological understanding and biotechnological applications. Despite a long history of study, the galactose 6-oxidase/glyoxal oxidase family of mononuclear copper-radical oxidases, Auxiliary Activity Family 5 (AA5), is currently represented by only very few characterized members. Here we report the recombinant production and detailed structure-function analyses of two homologues from the phytopathogenic fungi Colletotrichum graminicola and C. gloeosporioides, CgrAlcOx and CglAlcOx, respectively, to explore the wider biocatalytic potential in AA5. EPR spectroscopy and crystallographic analysis confirm a common active-site structure vis-à-vis the archetypal galactose 6-oxidase from Fusarium graminearum. Strikingly, however, CgrAlcOx and CglAlcOx are essentially incapable of oxidizing galactose and galactosides, but instead efficiently catalyse the oxidation of diverse aliphatic alcohols. The results highlight the significant potential of prospecting the evolutionary diversity of AA5 to reveal novel enzyme specificities, thereby informing both biology and applications.
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Affiliation(s)
- DeLu Tyler Yin
- Michael Smith Laboratories and Department of Chemistry, University of British Columbia, 2185 East Mall, Vancouver, British Columbia, Canada V6T 1Z4
| | - Saioa Urresti
- Department of Chemistry, University of York, Heslington, York YO10 5DD, UK
| | - Mickael Lafond
- Michael Smith Laboratories and Department of Chemistry, University of British Columbia, 2185 East Mall, Vancouver, British Columbia, Canada V6T 1Z4.,Institut des Sciences Moléculaires de Marseille-Team BiosCiences UMR 7313-CNRS, Aix-Marseille University, Avenue Escadrille Normandie Niemen, Marseille 13397, France
| | - Esther M Johnston
- Department of Chemistry, University of York, Heslington, York YO10 5DD, UK
| | - Fatemeh Derikvand
- Michael Smith Laboratories and Department of Chemistry, University of British Columbia, 2185 East Mall, Vancouver, British Columbia, Canada V6T 1Z4
| | - Luisa Ciano
- Department of Chemistry, University of York, Heslington, York YO10 5DD, UK
| | - Jean-Guy Berrin
- INRA, UMR1163 Biodiversité et Biotechnologie Fongiques Marseille F-13288, France
| | - Bernard Henrissat
- Architecture et Fonction des Macromolécules Biologiques, CNRS-Aix-Marseille University, 163 Avenue de Luminy, Marseille 13288, France.,INRA, USC 1408 AFMB, Marseille 13288, France.,Department of Biological Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Paul H Walton
- Department of Chemistry, University of York, Heslington, York YO10 5DD, UK
| | - Gideon J Davies
- Department of Chemistry, University of York, Heslington, York YO10 5DD, UK
| | - Harry Brumer
- Michael Smith Laboratories and Department of Chemistry, University of British Columbia, 2185 East Mall, Vancouver, British Columbia, Canada V6T 1Z4
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Mollerup F, Master E. Influence of a family 29 carbohydrate binding module on the recombinant production of galactose oxidase in Pichia pastoris. Data Brief 2015; 6:176-83. [PMID: 26858983 PMCID: PMC4706568 DOI: 10.1016/j.dib.2015.11.032] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2015] [Accepted: 11/10/2015] [Indexed: 11/30/2022] Open
Abstract
Herein, we report the extracellular expression of carbohydrate active fusion enzymes in Pichia pastoris. Particularly, CBM29-1-2 from Piromyces equi was separately fused to the N- and C-terminus of galactose 6-oxidase (GaO, D-galactose: oxygen 6-oxidoreductase, EC 1.1.13.9, CAZy family AA5) from Fusarium graminearum, generating CBM29-GaO and GaO-CBM29, respectively. P. pastoris was transformed with expression vectors encoding GaO, CBM29-GaO and GaO-CBM29, and the fusion proteins were expressed in both shake-flask and 2L bioreactor systems. Volumetric production yields and specific GaO activity increased when expression was performed in a bioreactor system compared to shake-flask cultivation. This was observed for both CBM29-GaO and GaO-CBM29, and is consistent with previous reports of GaO expression in P. pastoris (Spadiut et al., 2010; Anasontzis et al., 2014) [1], [2]. Fusion of CBM29 to the C-terminal of GaO (GaO-CBM29) resulted in a stable uniform protein at the expected calculated size (107 kDa) when analyzed with SDS-PAGE. By comparison, the expression of the N-terminal fusion protein (CBM29-GaO) was low, and two truncated versions of CBM29-GaO were coexpressed with the full-sized protein. Despite differences in protein yield, the specific GaO activity on galactose was not affected by CBM29 fusion to either the N- or C-terminus of the enzyme. A detailed description of the catalytic and physiochemical properties of CBM29-GaO and GaO-CBM29 is available in the parent publication (Mollerup et al., 2015) [3].
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Affiliation(s)
- Filip Mollerup
- Department of Biotechnology and Chemical Technology, Aalto University, 00076 Aalto, Finland
| | - Emma Master
- Department of Biotechnology and Chemical Technology, Aalto University, 00076 Aalto, Finland; Department of Chemical Engineering and Applied Chemistry, University of Toronto, 200 College Street, Toronto, Ontario, Canada M5S 3E5
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Mollerup F, Parikka K, Vuong TV, Tenkanen M, Master E. Influence of a family 29 carbohydrate binding module on the activity of galactose oxidase from Fusarium graminearum. Biochim Biophys Acta Gen Subj 2015; 1860:354-62. [PMID: 26518347 DOI: 10.1016/j.bbagen.2015.10.023] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2015] [Revised: 10/02/2015] [Accepted: 10/23/2015] [Indexed: 11/26/2022]
Abstract
BACKGROUND Galactose oxidase (GaO) selectively oxidizes the primary hydroxyl of galactose to a carbonyl, facilitating targeted chemical derivatization of galactose-containing polysaccharides, leading to renewable polymers with tailored physical and chemical properties. Here we investigate the impact of a family 29 glucomannan binding module on the activity and binding of GaO towards various polysaccharides. Specifically, CBM29-1-2 from Piromyces equi was separately linked to the N- and C-termini of GaO. RESULTS Both GaO-CBM29 and CBM29-GaO were successfully expressed in Pichia pastoris, and demonstrated enhanced binding to galactomannan, galactoglucomannan and galactoxyloglucan. The position of the CBM29 fusion affected the enzyme function. Particularly, C-terminal fusion led to greatest increases in galactomannan binding and catalytic efficiency, where relative to wild-type GaO, kcat/Km values increased by 7.5 and 19.8 times on guar galactomannan and locust bean galactomannan, respectively. The fusion of CBM29 also induced oligomerization of GaO-CBM29. MAJOR CONCLUSIONS Similar to impacts of cellulose-binding modules associated with cellulolytic enzymes, increased substrate binding impeded the action of GaO fusions on more concentrated preparations of galactomannan, galactoglucomannan and galactoxyloglucan; this was especially true for GaO-CBM29. Given the N-terminal positioning of the native galactose-binding CBM32 in GaO, the varying impacts of N-terminal versus C-terminal fusion of CBM29-1-2 may reflect competing action of neighboring CBMs. GENERAL SIGNIFICANCE This study thoroughly examines and discusses the effects of CBM fusion to non-lignocellulytic enzymes on soluble polysaccharides. Herein kinetics of GaO on galactose containing polysaccharides is presented for the first time.
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Affiliation(s)
- Filip Mollerup
- Department of Biotechnology and Chemical Technology, Aalto University, 00076 Aalto, Finland
| | - Kirsti Parikka
- Department of Food and Environmental Sciences, University of Helsinki, P.O. Box 27, Helsinki 00014, Finland
| | - Thu V Vuong
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, 200 College Street, Toronto, Ontario, M5S 3E5, Canada
| | - Maija Tenkanen
- Department of Food and Environmental Sciences, University of Helsinki, P.O. Box 27, Helsinki 00014, Finland
| | - Emma Master
- Department of Biotechnology and Chemical Technology, Aalto University, 00076 Aalto, Finland; Department of Chemical Engineering and Applied Chemistry, University of Toronto, 200 College Street, Toronto, Ontario, M5S 3E5, Canada.
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22
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Parikka K, Master E, Tenkanen M. Oxidation with galactose oxidase: Multifunctional enzymatic catalysis. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.molcatb.2015.06.006] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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23
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Pedro AQ, Martins LM, Dias JML, Bonifácio MJ, Queiroz JA, Passarinha LA. An artificial neural network for membrane-bound catechol-O-methyltransferase biosynthesis with Pichia pastoris methanol-induced cultures. Microb Cell Fact 2015; 14:113. [PMID: 26246150 PMCID: PMC4527236 DOI: 10.1186/s12934-015-0304-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2015] [Accepted: 07/25/2015] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND Membrane proteins are important drug targets in many human diseases and gathering structural information regarding these proteins encourages the pharmaceutical industry to develop new molecules using structure-based drug design studies. Specifically, membrane-bound catechol-O-methyltransferase (MBCOMT) is an integral membrane protein that catalyzes the methylation of catechol substrates and has been linked to several diseases such as Parkinson's disease and Schizophrenia. Thereby, improvements in the clinical outcome of the therapy to these diseases may come from structure-based drug design where reaching MBCOMT samples in milligram quantities are crucial for acquiring structural information regarding this target protein. Therefore, the main aim of this work was to optimize the temperature, dimethylsulfoxide (DMSO) concentration and the methanol flow-rate for the biosynthesis of recombinant MBCOMT by Pichia pastoris bioreactor methanol-induced cultures using artificial neural networks (ANN). RESULTS The optimization trials intended to evaluate MBCOMT expression by P. pastoris bioreactor cultures led to the development of a first standard strategy for MBCOMT bioreactor biosynthesis with a batch growth on glycerol until the dissolved oxygen spike, 3 h of glycerol feeding and 12 h of methanol induction. The ANN modeling of the aforementioned fermentation parameters predicted a maximum MBCOMT specific activity of 384.8 nmol/h/mg of protein at 30°C, 2.9 mL/L/H methanol constant flow-rate and with the addition of 6% (v/v) DMSO with almost 90% of healthy cells at the end of the induction phase. These results allowed an improvement of MBCOMT specific activity of 6.4-fold in comparison to that from the small-scale biosynthesis in baffled shake-flasks. CONCLUSIONS The ANN model was able to describe the effects of temperature, DMSO concentration and methanol flow-rate on MBCOMT specific activity, as shown by the good fitness between predicted and observed values. This experimental procedure highlights the potential role of chemical chaperones such as DMSO in improving yields of recombinant membrane proteins with a different topology than G-coupled receptors. Finally, the proposed ANN shows that the manipulation of classic fermentation parameters coupled with the addition of specific molecules can open and reinforce new perspectives in the optimization of P. pastoris bioprocesses for membrane proteins biosynthesis.
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Affiliation(s)
- Augusto Q Pedro
- CICS-UBI, Centro de Investigação em Ciências da Saúde, Universidade da Beira Interior, Avenida Infante D. Henrique, 6201-001, Covilhã, Portugal.
| | - Luís M Martins
- CICS-UBI, Centro de Investigação em Ciências da Saúde, Universidade da Beira Interior, Avenida Infante D. Henrique, 6201-001, Covilhã, Portugal.
| | - João M L Dias
- Department of Biochemistry, Cambridge System Biology Centre, University of Cambridge, Sanger Building, 80 Tennis Court Road, Cambridge, CB2 1GA, UK.
| | - Maria J Bonifácio
- Departamento de Investigação e Desenvolvimento, Bial, 4745-457, São Mamede do Coronado, Portugal.
| | - João A Queiroz
- CICS-UBI, Centro de Investigação em Ciências da Saúde, Universidade da Beira Interior, Avenida Infante D. Henrique, 6201-001, Covilhã, Portugal.
| | - Luís A Passarinha
- CICS-UBI, Centro de Investigação em Ciências da Saúde, Universidade da Beira Interior, Avenida Infante D. Henrique, 6201-001, Covilhã, Portugal.
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Canales C, Altamirano C, Berrios J. Effect of dilution rate and methanol-glycerol mixed feeding on heterologous Rhizopus oryzae lipase production with Pichia pastoris Mut(+) phenotype in continuous culture. Biotechnol Prog 2015; 31:707-14. [PMID: 25740724 DOI: 10.1002/btpr.2069] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Revised: 01/23/2015] [Indexed: 11/08/2022]
Abstract
The induction using substrate mixtures is an operational strategy for improving the productivity of heterologous protein production with Pichia pastoris. Glycerol as a cosubstrate allows for growth at a higher specific growth rate, but also has been reported to be repressor of the expression from the AOX1 promoter. Thus, further insights about the effects of glycerol are required for designing the induction stage with mixed substrates. The production of Rhizopus oryzae lipase (ROL) was used as a model system to investigate the application of methanol-glycerol feeding mixtures in fast metabolizing methanol phenotype. Cultures were performed in a simple chemostat system and the response surface methodology was used for the evaluation of both dilution rate and methanol-glycerol feeding composition as experimental factors. Our results indicate that productivity and yield of ROL are strongly affected by dilution rate, with no interaction effect between the involved factors. Productivity showed the highest value around 0.04-0.06 h(-1) , while ROL yield decreased along the whole dilution rate range evaluated (0.03-0.1 h(-1) ). Compared to production level achieved with methanol-only feeding, the highest specific productivity was similar in mixed feeding (0.9 UA g-biomass(-1) h(-1) ), but volumetric productivity was 70% higher. Kinetic analysis showed that these results are explained by the effects of dilution rate on specific methanol uptake rate, instead of a repressor effect caused by glycerol feeding. It is concluded that despite the effect of dilution rate on ROL yield, mixed feeding strategy is a proper process option to be applied to P. pastoris Mut(+) phenotype for heterologous protein production.
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Affiliation(s)
- Christian Canales
- School of Biochemical Engineering, Pontificia Universidad Católica de Valparaíso, Av. Brasil 2085, Valparaíso, Chile
| | - Claudia Altamirano
- School of Biochemical Engineering, Pontificia Universidad Católica de Valparaíso, Av. Brasil 2085, Valparaíso, Chile
| | - Julio Berrios
- School of Biochemical Engineering, Pontificia Universidad Católica de Valparaíso, Av. Brasil 2085, Valparaíso, Chile
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Klein T, Niklas J, Heinzle E. Engineering the supply chain for protein production/secretion in yeasts and mammalian cells. J Ind Microbiol Biotechnol 2015; 42:453-64. [PMID: 25561318 DOI: 10.1007/s10295-014-1569-2] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2014] [Accepted: 12/16/2014] [Indexed: 12/14/2022]
Abstract
Metabolic bottlenecks play an increasing role in yeasts and mammalian cells applied for high-performance production of proteins, particularly of pharmaceutical ones that require complex posttranslational modifications. We review the present status and developments focusing on the rational metabolic engineering of such cells to optimize the supply chain for building blocks and energy. Methods comprise selection of beneficial genetic modifications, rational design of media and feeding strategies. Design of better producer cells based on whole genome-wide metabolic network analysis becomes increasingly possible. High-resolution methods of metabolic flux analysis for the complex networks in these compartmented cells are increasingly available. We discuss phenomena that are common to both types of organisms but also those that are different with respect to the supply chain for the production and secretion of pharmaceutical proteins.
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Affiliation(s)
- Tobias Klein
- Research Area Biochemical Engineering, Institute of Chemical Engineering, Vienna University of Technology, Gumpendorfer Strasse 1a, 1060, Vienna, Austria
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Mallem M, Warburton S, Li F, Shandil I, Nylen A, Kim S, Jiang Y, Meehl M, d'Anjou M, Stadheim TA, Choi BK. Maximizing recombinant human serum albumin production in a MutsPichia pastorisstrain. Biotechnol Prog 2014; 30:1488-96. [DOI: 10.1002/btpr.1990] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2014] [Revised: 08/28/2014] [Indexed: 11/08/2022]
Affiliation(s)
| | | | - Fang Li
- GlycoFi, Biologics Discovery; Merck & Co., Inc. Lebanon NH
| | - Ishaan Shandil
- GlycoFi, Biologics Discovery; Merck & Co., Inc. Lebanon NH
| | - Adam Nylen
- GlycoFi, Biologics Discovery; Merck & Co., Inc. Lebanon NH
| | - Sehoon Kim
- GlycoFi, Biologics Discovery; Merck & Co., Inc. Lebanon NH
| | - Youwei Jiang
- GlycoFi, Biologics Discovery; Merck & Co., Inc. Lebanon NH
| | - Michael Meehl
- GlycoFi, Biologics Discovery; Merck & Co., Inc. Lebanon NH
| | - Marc d'Anjou
- GlycoFi, Biologics Discovery; Merck & Co., Inc. Lebanon NH
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