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Talens-Perales D, Nicolau-Sanus M, Polaina J, Daròs JA. Expression of an extremophilic xylanase in Nicotiana benthamiana and its use for the production of prebiotic xylooligosaccharides. Sci Rep 2022; 12:15743. [PMID: 36131073 PMCID: PMC9492658 DOI: 10.1038/s41598-022-19774-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Accepted: 09/05/2022] [Indexed: 11/30/2022] Open
Abstract
A gene construct encoding a xylanase, which is active in extreme conditions of temperature and alkaline pH (90 °C, pH 10.5), has been transitorily expressed with high efficiency in Nicotiana benthamiana using a viral vector. The enzyme, targeted to the apoplast, accumulates in large amounts in plant tissues in as little as 7 days after inoculation, without detrimental effects on plant growth. The properties of the protein produced by the plant, in terms of resistance to temperature, pH, and enzymatic activity, are equivalent to those observed when Escherichia coli is used as a host. Purification of the plant-produced recombinant xylanase is facilitated by exporting the protein to the apoplastic space. The production of this xylanase by N. benthamiana, which avoids the hindrances derived from the use of E. coli, namely, intracellular production requiring subsequent purification, represents an important step for potential applications in the food industry in which more sustainable and green products are continuously demanded. As an example, the use of the enzyme producing prebiotic xylooligosdaccharides from xylan is here reported.
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Affiliation(s)
- David Talens-Perales
- Department of Food Biotechnology, Institute of Agrochemistry and Food Technology, Spanish National Research Council (IATA-CSIC), Paterna, Valencia, Spain
| | - María Nicolau-Sanus
- Instituto de Biología Molecular y Celular de Plantas (Consejo Superior de Investigaciones Científicas-Universitat Politècnica de València), 46022, Valencia, Spain
| | - Julio Polaina
- Department of Food Biotechnology, Institute of Agrochemistry and Food Technology, Spanish National Research Council (IATA-CSIC), Paterna, Valencia, Spain.
| | - José-Antonio Daròs
- Instituto de Biología Molecular y Celular de Plantas (Consejo Superior de Investigaciones Científicas-Universitat Politècnica de València), 46022, Valencia, Spain.
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Abd-Aziz N, Tan BC, Rejab NA, Othman RY, Khalid N. A New Plant Expression System for Producing Pharmaceutical Proteins. Mol Biotechnol 2020; 62:240-251. [PMID: 32108286 DOI: 10.1007/s12033-020-00242-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
In the past decade, interest in the production of recombinant pharmaceutical proteins in plants has tremendously progressed because plants do not harbor mammalian viruses, are economically competitive, easily scalable, and capable of carrying out complex post-translational modifications required for recombinant pharmaceutical proteins. Mucuna bracteata is an essential perennial cover crop species widely planted as an underground cover in oil palm and rubber plantations. As a legume, they have high biomass, thrive in its habitat, and can fix nitrogen. Thus, M. bracteata is a cost-efficient crop that shows ideal characteristics as a platform for mass production of recombinant protein. In this study, we established a new platform for the transient production of a recombinant protein in M. bracteata via vacuum-assisted agro-infiltration. Five-week-old M. bracteata plants were vacuum infiltrated with Agrobacterium tumefaciens harboring a plasmid that encodes for an anti-toxoplasma immunoglobulin (IgG) under different parameters, including trifoliate leaf positional effects, days to harvest post-infiltration, and the Agrobacterium strain used. Our results showed that vacuum infiltration of M. bracteata plant with A. tumefaciens strain GV3101 produced the highest concentration of heterologous protein in its bottom trifoliate leaf at 2 days post-infiltration. The purified anti-toxoplasma IgG was then analyzed using Western blot and ELISA. It was demonstrated that, while structural heterogeneity existed in the purified anti-toxoplasma IgG from M. bracteata, its transient expression level was two-fold higher than the model platform, Nicotiana benthamiana. This study has laid the foundation towards establishing M. bracteata as a potential platform for the production of recombinant pharmaceutical protein.
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Affiliation(s)
- Nazrin Abd-Aziz
- Institute of Biological Sciences, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Boon Chin Tan
- Centre for Research in Biotechnology for Agriculture, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Nur Ardiyana Rejab
- Institute of Biological Sciences, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia
- Centre for Research in Biotechnology for Agriculture, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Rofina Yasmin Othman
- Institute of Biological Sciences, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia.
- Centre for Research in Biotechnology for Agriculture, University of Malaya, 50603, Kuala Lumpur, Malaysia.
| | - Norzulaani Khalid
- Institute of Biological Sciences, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia.
- Centre for Research in Biotechnology for Agriculture, University of Malaya, 50603, Kuala Lumpur, Malaysia.
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3
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Adaikpoh BI, Akbar S, Albataineh H, Misra SK, Sharp JS, Stevens DC. Myxobacterial Response to Methyljasmonate Exposure Indicates Contribution to Plant Recruitment of Micropredators. Front Microbiol 2020; 11:34. [PMID: 32047489 PMCID: PMC6997564 DOI: 10.3389/fmicb.2020.00034] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Accepted: 01/09/2020] [Indexed: 11/25/2022] Open
Abstract
Chemical exchanges between plants and microbes within rhizobiomes are critical to the development of community structure. Volatile root exudates such as the phytohormone methyljasmonate (MeJA) contribute to various plant stress responses and have been implicated to play a role in the maintenance of microbial communities. Myxobacteria are competent predators of plant pathogens and are generally considered beneficial to rhizobiomes. While plant recruitment of myxobacteria to stave off pathogens has been suggested, no involved chemical signaling processes are known. Herein we expose predatory myxobacteria to MeJA and employ untargeted mass spectrometry, motility assays, and RNA sequencing to monitor changes in features associated with predation such as specialized metabolism, swarm expansion, and production of lytic enzymes. From a panel of four myxobacteria, we observe the most robust metabolic response from plant-associated Archangium sp. strain Cb G35 with 10 μM MeJA impacting the production of at least 300 metabolites and inducing a ≥ fourfold change in transcription for 56 genes. We also observe that MeJA induces A. sp. motility supporting plant recruitment of a subset of the investigated micropredators. Provided the varying responses to MeJA exposure, our observations indicate that MeJA contributes to the recruitment of select predatory myxobacteria suggesting further efforts are required to explore the microbial impact of plant exudates associated with biotic stress.
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Affiliation(s)
| | | | | | | | | | - D. Cole Stevens
- Department of BioMolecular Sciences, The University of Mississippi, Oxford, MS, United States
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4
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Amiri M, Jalali-Javaran M, Haddad R, Ehsani P. In silico and in vivo analyses of the mutated human tissue plasminogen activator (mtPA) and the antithetical effects of P19 silencing suppressor on its expression in two Nicotiana species. Sci Rep 2018; 8:14079. [PMID: 30232346 PMCID: PMC6145930 DOI: 10.1038/s41598-018-32099-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2017] [Accepted: 08/13/2018] [Indexed: 11/23/2022] Open
Abstract
Human tissue-type plasminogen activator is one of the most important therapeutic proteins involved in the breakdown of blood clots following the stroke. A mutation was found at position 1541 bp (G514E) and the mutated form was cloned into the binary vector pTRAc-ERH. In silico analysis showed that this mutation might have no significant effect on the active site of the tissue plasminogen activator enzyme. Accordingly, zymography assay confirmed the serine protease activity of the mutated form and its derivatives. The expression of the mutated form was verified with/without co-agroinjection of the P19 gene silencing suppressor in both Nicotiana tabacum and N. benthamiana. The ELISA results showed that the concentration of the mutated form in the absence of P19 was 0.65% and 0.74% of total soluble protein versus 0.141% and 1.36% in the presence of P19 in N. benthamiana and N. tabacum, respectively. In N. tabacum, co-agroinjection of P19 had the synergistic effect and increased the mutated tissue plasminogen activator production two-fold higher. However, in N. benthamiana, the presence of P19 had the adverse effect of five-fold reduction in the concentration. Moreover, results showed that the activity of the mutated form and its derivatives was more than that of the purified commercial tissue plasminogen activator.
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Affiliation(s)
- Mahshid Amiri
- Department of Biotechnology and Plant Breeding, Faculty of Agriculture, Tarbiat Modares University (TMU), Tehran, Iran
| | - Mokhtar Jalali-Javaran
- Department of Biotechnology and Plant Breeding, Faculty of Agriculture, Tarbiat Modares University (TMU), Tehran, Iran.
| | - Raheem Haddad
- Agricultural Biotechnology Department, Imam Khomeini International University, Qazvin, Iran
| | - Parastoo Ehsani
- Department of Molecular Biology, Pasteur Institute of Iran (IPI), Tehran, Iran.
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5
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Genetic manipulations in crops: Challenges and opportunities. Genomics 2017; 109:494-505. [PMID: 28778540 DOI: 10.1016/j.ygeno.2017.07.007] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Revised: 07/21/2017] [Accepted: 07/25/2017] [Indexed: 01/01/2023]
Abstract
An alarming increase in the human population necessitates doubling the world food production in the next few decades. Although a number of possible biotechnological measures are under consideration, central to these efforts is the development of transgenic crops to produce more food, and the traits with which plants could better adapt to adverse environmental conditions in a changing climate. The emergence of new tools for the introduction of foreign genes into plants has increased both our knowledge and the capacity to develop transgenic plants. In addition, a better understanding of genetic modifications has allowed us to study the impact that genetically modified crop plants may have on the environment. This article discusses different techniques routinely used to carry out genetic modifications in plants while highlighting challenges with them, which future research must address to increase acceptance of GM crops for meeting food security challenges effectively.
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Leth IK, McDonald KA. Growth kinetics and scale-up of Agrobacterium tumefaciens. Appl Microbiol Biotechnol 2017; 101:4895-4903. [PMID: 28357545 DOI: 10.1007/s00253-017-8241-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Revised: 02/24/2017] [Accepted: 03/09/2017] [Indexed: 12/15/2022]
Abstract
Production of recombinant proteins in plants through Agrobacterium-mediated transient expression is a promising method of producing human therapeutic proteins, vaccines, and commercial enzymes. This process has been shown to be viable at a large scale and involves growing large quantities of wild-type plants and infiltrating the leaf tissue with a suspension of Agrobacterium tumefaciens bearing the genes of interest. This study examined one of the steps in this process that had not yet been optimized: the scale-up of Agrobacterium production to sufficient volumes for large-scale plant infiltration. Production of Agrobacterium strain C58C1 pTFS40 was scaled up from shake flasks (50-100 mL) to benchtop (5 L) scale with three types of media: Lysogeny broth (LB), yeast extract peptone (YEP) media, and a sucrose-based defined media. The maximum specific growth rate (μ max) of the strain in the three types of media was 0.46 ± 0.04 h-1 in LB media, 0.43 ± 0.03 h-1 in YEP media, and 0.27 ± 0.01 h-1 in defined media. The maximum biomass concentration reached at this scale was 2.0 ± 0.1, 2.8 ± 0.1, and 2.6 ± 0.1 g dry cell weight (DCW)/L for the three media types. Production was successfully scaled up to a 100-L working volume reactor with YEP media, using k L a as the scale-up parameter.
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Affiliation(s)
- Ingrid K Leth
- Department of Chemical Engineering, University of California at Davis, Davis, CA, 95616, USA
| | - Karen A McDonald
- Department of Chemical Engineering, University of California at Davis, Davis, CA, 95616, USA.
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Leth IK, McDonald KA. Media development for large scale Agrobacterium tumefaciens culture. Biotechnol Prog 2017; 33:1218-1225. [PMID: 28556626 DOI: 10.1002/btpr.2504] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Revised: 05/03/2017] [Indexed: 11/09/2022]
Abstract
A chemically defined media was developed for growing Agrobacterium tumefaciens at large scale for commercial production of recombinant proteins by transient expression in plants. Design of experiments was used to identify major and secondary effects of ten media components: sucrose, ammonium sulfate ((NH4 )2 SO4 ), magnesium sulfate heptahydrate (MgSO4 *7H2 O), calcium chloride dihydrate (CaCl2 *2H2 O), iron (II) sulfate heptahydrate (FeSO4 *7H2 O), manganese (II) sulfate monohydrate (MnSO4 *H2 O), zinc sulfate heptahydrate (ZnSO4 *7H2 O), sodium chloride (NaCl), potassium chloride (KCl) and a sodium/potassium phosphate buffer (Na2 HPO4 /KH2 PO4 ). Calcium and zinc were found to have no detectable impact on biomass concentration or transient expression level, and concentrations of the other components that maximized final biomass concentration were determined. The maximum specific growth rate of Agrobacterium strain C58C1 pTFS40 in this media was 0.33 ± 0.01 h-1 and the final biomass concentration after 26 h of batch growth in shake flasks was 2.6 g dry cell weight/L. Transient expression levels of the reporter protein GUS following infiltration of a recombinant Agrobacterium strain C58C1 into N. benthamiana were comparable when the strain was grown in the defined media, Lysogeny Broth (LB) media, or yeast extract-peptone (YEP) media. In LB and YEP media, free amino acid concentration was measured at three points over the course of batch growth of Agrobacterium strain C58C1 pTFS40; results indicated that l-serine and l-asparagine were depleted from the media first, followed by l-alanine and l-glutamic acid. © 2017 American Institute of Chemical Engineers Biotechnol. Prog., 33:1218-1225, 2017.
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Affiliation(s)
- Ingrid K Leth
- Dept. of Chemical Engineering, University of California at Davis, Davis, CA, 95616
| | - Karen A McDonald
- Dept. of Chemical Engineering, University of California at Davis, Davis, CA, 95616
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8
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Improved transient production of a cellulase enzyme in detached sunflower leaves using plant hormones. BIOTECHNOL BIOPROC E 2017. [DOI: 10.1007/s12257-016-0410-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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9
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Park SH, Ong RG, Sticklen M. Strategies for the production of cell wall-deconstructing enzymes in lignocellulosic biomass and their utilization for biofuel production. PLANT BIOTECHNOLOGY JOURNAL 2016; 14:1329-44. [PMID: 26627868 PMCID: PMC5063159 DOI: 10.1111/pbi.12505] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2015] [Revised: 10/23/2015] [Accepted: 11/02/2015] [Indexed: 05/18/2023]
Abstract
Microbial cell wall-deconstructing enzymes are widely used in the food, wine, pulp and paper, textile, and detergent industries and will be heavily utilized by cellulosic biorefineries in the production of fuels and chemicals. Due to their ability to use freely available solar energy, genetically engineered bioenergy crops provide an attractive alternative to microbial bioreactors for the production of cell wall-deconstructing enzymes. This review article summarizes the efforts made within the last decade on the production of cell wall-deconstructing enzymes in planta for use in the deconstruction of lignocellulosic biomass. A number of strategies have been employed to increase enzyme yields and limit negative impacts on plant growth and development including targeting heterologous enzymes into specific subcellular compartments using signal peptides, using tissue-specific or inducible promoters to limit the expression of enzymes to certain portions of the plant or certain times, and fusion of amplification sequences upstream of the coding region to enhance expression. We also summarize methods that have been used to access and maintain activity of plant-generated enzymes when used in conjunction with thermochemical pretreatments for the production of lignocellulosic biofuels.
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Affiliation(s)
- Sang-Hyuck Park
- Department of Plant, Soil and Microbial Sciences, Michigan State University, East Lansing, MI, USA
| | - Rebecca Garlock Ong
- Department of Chemical Engineering and Materials Science, DOE Great Lakes Bioenergy Research Center, Michigan State University, Lansing, MI, USA
- Department of Chemical Engineering, Michigan Technological University, Houghton, MI, USA
| | - Mariam Sticklen
- Department of Plant, Soil and Microbial Sciences, Michigan State University, East Lansing, MI, USA
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10
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Willis JD, Mazarei M, Stewart CN. Transgenic Plant-Produced Hydrolytic Enzymes and the Potential of Insect Gut-Derived Hydrolases for Biofuels. FRONTIERS IN PLANT SCIENCE 2016; 7:675. [PMID: 27303411 PMCID: PMC4885837 DOI: 10.3389/fpls.2016.00675] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Accepted: 05/02/2016] [Indexed: 05/25/2023]
Abstract
Various perennial C4 grass species have tremendous potential for use as lignocellulosic biofuel feedstocks. Currently available grasses require costly pre-treatment and exogenous hydrolytic enzyme application to break down complex cell wall polymers into sugars that can then be fermented into ethanol. It has long been hypothesized that engineered feedstock production of cell wall degrading (CWD) enzymes would be an efficient production platform for of exogenous hydrolytic enzymes. Most research has focused on plant overexpression of CWD enzyme-coding genes from free-living bacteria and fungi that naturally break down plant cell walls. Recently, it has been found that insect digestive tracts harbor novel sources of lignocellulolytic biocatalysts that might be exploited for biofuel production. These CWD enzyme genes can be located in the insect genomes or in symbiotic microbes. When CWD genes are transformed into plants, negative pleiotropic effects are possible such as unintended cell wall digestion. The use of codon optimization along with organelle and tissue specific targeting improves CWD enzyme yields. The literature teaches several important lessons on strategic deployment of CWD genes in transgenic plants, which is the focus of this review.
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Affiliation(s)
- Jonathan D. Willis
- Department of Plant Sciences, University of TennesseeKnoxville, TN, USA
- Oak Ridge National Laboratory, BioEnergy Science CenterOak Ridge, TN, USA
| | - Mitra Mazarei
- Department of Plant Sciences, University of TennesseeKnoxville, TN, USA
- Oak Ridge National Laboratory, BioEnergy Science CenterOak Ridge, TN, USA
| | - C. Neal Stewart
- Department of Plant Sciences, University of TennesseeKnoxville, TN, USA
- Oak Ridge National Laboratory, BioEnergy Science CenterOak Ridge, TN, USA
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Fujiuchi N, Matsuda R, Matoba N, Fujiwara K. Removal of bacterial suspension water occupying the intercellular space of detached leaves after agroinfiltration improves the yield of recombinant hemagglutinin in a Nicotiana benthamiana transient gene expression system. Biotechnol Bioeng 2016; 113:901-6. [PMID: 26461274 DOI: 10.1002/bit.25854] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2015] [Revised: 10/02/2015] [Accepted: 10/08/2015] [Indexed: 11/07/2022]
Abstract
The use of detached leaves instead of whole plants provides an alternative means for recombinant protein production based on Agrobacterium tumefaciens-mediated transient gene overexpression. However, the process for high-level protein production in detached leaves has not yet been established. In this study, we focused on leaf handling and maintenance conditions immediately after infiltration with Agrobacterium suspension (agroinfiltration) to improve recombinant protein expression in detached Nicotiana benthamiana leaves. We demonstrated that the residual water of bacterial suspension in detached leaves had significant impact on the yield of recombinant influenza hemagglutinin (HA). Immediately after agroinfiltration, detached leaves were stored in a dehumidified chamber to allow bacterial suspension water occupying intercellular space to be removed by transpiration. We varied the duration of this water removal treatment from 0.7 to 4.4 h, which resulted in leaf fresh weights ranging from 0.94 to 1.28 g g(-1) relative to weights measured just before agroinfiltration. We used these relative fresh weights (RFWs) as an indicator of the amount of residual water. The detached leaves were then incubated in humidified chambers for 6 days. We found that the presence of residual water significantly decreased HA yield, with a clear inverse correlation observed between HA yield and RFW. We next compared HA yields in detached leaves with those obtained from intact leaves by whole-plant expression performed at the same time. The maximum HA yield obtained from a detached leaf with a RFW of approximately 1.0, namely, 800 μg gFW(-1), was comparable to the mean HA yield of 846 μg gFW(-1) generated in intact leaves. Our results indicate the necessity of removing bacterial suspension water from agroinfiltrated detached leaves in transient overexpression systems and point to a critical factor enabling the detached-leaf system as a viable recombinant protein factory.
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Affiliation(s)
- Naomichi Fujiuchi
- Department of Biological and Environmental Engineering, Graduate School of Agricultural and Life Sciences, University of Tokyo, 1-1-1 Yayoi, Bunkyo, Tokyo, 113-8657, Japan.
| | - Ryo Matsuda
- Department of Biological and Environmental Engineering, Graduate School of Agricultural and Life Sciences, University of Tokyo, 1-1-1 Yayoi, Bunkyo, Tokyo, 113-8657, Japan
| | - Nobuyuki Matoba
- Owensboro Cancer Research Program, James Graham Brown Cancer Center, University of Louisville School of Medicine, Owensboro, Kentucky
- Department of Pharmacology and Toxicology, University of Louisville School of Medicine, Louisville, Kentucky
| | - Kazuhiro Fujiwara
- Department of Biological and Environmental Engineering, Graduate School of Agricultural and Life Sciences, University of Tokyo, 1-1-1 Yayoi, Bunkyo, Tokyo, 113-8657, Japan
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Gascuel Q, Buendia L, Pecrix Y, Blanchet N, Muños S, Vear F, Godiard L. RXLR and CRN Effectors from the Sunflower Downy Mildew Pathogen Plasmopara halstedii Induce Hypersensitive-Like Responses in Resistant Sunflower Lines. FRONTIERS IN PLANT SCIENCE 2016; 7:1887. [PMID: 28066456 PMCID: PMC5165252 DOI: 10.3389/fpls.2016.01887] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Accepted: 11/29/2016] [Indexed: 05/20/2023]
Abstract
Plasmopara halstedii is an obligate biotrophic oomycete causing downy mildew disease on sunflower, Helianthus annuus, an economically important oil crop. Severe symptoms of the disease (e.g., plant dwarfism, leaf bleaching, sporulation and production of infertile flower) strongly impair seed yield. Pl resistance genes conferring resistance to specific P. halstedii pathotypes were located on sunflower genetic map but yet not cloned. They are present in cultivated lines to protect them against downy mildew disease. Among the 16 different P. halstedii pathotypes recorded in France, pathotype 710 is frequently found, and therefore continuously controlled in sunflower by different Pl genes. High-throughput sequencing of cDNA from P. halstedii led us to identify potential effectors with the characteristic RXLR or CRN motifs described in other oomycetes. Expression of six P. halstedii putative effectors, five RXLR and one CRN, was analyzed by qRT-PCR in pathogen spores and in the pathogen infecting sunflower leaves and selected for functional analyses. We developed a new method for transient expression in sunflower plant leaves and showed for the first time subcellular localization of P. halstedii effectors fused to a fluorescent protein in sunflower leaf cells. Overexpression of the CRN and of 3 RXLR effectors induced hypersensitive-like cell death reactions in some sunflower near-isogenic lines resistant to pathotype 710 and not in susceptible corresponding lines, suggesting they could be involved in Pl loci-mediated resistances.
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Affiliation(s)
- Quentin Gascuel
- Laboratoire des Interactions Plantes Microorganismes, INRA, CNRS, Université de ToulouseCastanet Tolosan, France
| | - Luis Buendia
- Laboratoire des Interactions Plantes Microorganismes, INRA, CNRS, Université de ToulouseCastanet Tolosan, France
| | - Yann Pecrix
- Laboratoire des Interactions Plantes Microorganismes, INRA, CNRS, Université de ToulouseCastanet Tolosan, France
| | - Nicolas Blanchet
- Laboratoire des Interactions Plantes Microorganismes, INRA, CNRS, Université de ToulouseCastanet Tolosan, France
| | - Stéphane Muños
- Laboratoire des Interactions Plantes Microorganismes, INRA, CNRS, Université de ToulouseCastanet Tolosan, France
| | | | - Laurence Godiard
- Laboratoire des Interactions Plantes Microorganismes, INRA, CNRS, Université de ToulouseCastanet Tolosan, France
- *Correspondence: Laurence Godiard,
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13
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Robert S, Goulet MC, D'Aoust MA, Sainsbury F, Michaud D. Leaf proteome rebalancing in Nicotiana benthamiana for upstream enrichment of a transiently expressed recombinant protein. PLANT BIOTECHNOLOGY JOURNAL 2015; 13:1169-79. [PMID: 26286859 DOI: 10.1111/pbi.12452] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2015] [Revised: 07/03/2015] [Accepted: 07/15/2015] [Indexed: 05/18/2023]
Abstract
A key factor influencing the yield of biopharmaceuticals in plants is the ratio of recombinant to host proteins in crude extracts. Postextraction procedures have been devised to enrich recombinant proteins before purification. Here, we assessed the potential of methyl jasmonate (MeJA) as a generic trigger of recombinant protein enrichment in Nicotiana benthamiana leaves before harvesting. Previous studies have reported a significant rebalancing of the leaf proteome via the jasmonate signalling pathway, associated with ribulose 1,5-bisphosphate carboxylase oxygenase (RuBisCO) depletion and the up-regulation of stress-related proteins. As expected, leaf proteome alterations were observed 7 days post-MeJA treatment, associated with lowered RuBisCO pools and the induction of stress-inducible proteins such as protease inhibitors, thionins and chitinases. Leaf infiltration with the Agrobacterium tumefaciens bacterial vector 24 h post-MeJA treatment induced a strong accumulation of pathogenesis-related proteins after 6 days, along with a near-complete reversal of MeJA-mediated stress protein up-regulation. RuBisCO pools were partly restored upon infiltration, but most of the depletion effect observed in noninfiltrated plants was maintained over six more days, to give crude protein samples with 50% less RuBisCO than untreated tissue. These changes were associated with net levels reaching 425 μg/g leaf tissue for the blood-typing monoclonal antibody C5-1 expressed in MeJA-treated leaves, compared to less than 200 μg/g in untreated leaves. Our data confirm overall the ability of MeJA to trigger RuBisCO depletion and recombinant protein enrichment in N. benthamiana leaves, estimated here for C5-1 at more than 2-fold relative to host proteins.
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Affiliation(s)
- Stéphanie Robert
- Centre de recherche et d'innovation sur les végétaux, Pavillon Envirotron, Université Laval, Québec, QC, Canada
| | - Marie-Claire Goulet
- Centre de recherche et d'innovation sur les végétaux, Pavillon Envirotron, Université Laval, Québec, QC, Canada
| | | | - Frank Sainsbury
- Centre de recherche et d'innovation sur les végétaux, Pavillon Envirotron, Université Laval, Québec, QC, Canada
- The University of Queensland, Australian Institute for Bioengineering and Nanotechnology, St Lucia, QLD, Australia
| | - Dominique Michaud
- Centre de recherche et d'innovation sur les végétaux, Pavillon Envirotron, Université Laval, Québec, QC, Canada
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14
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Jung SK, McDonald KA, Dandekar AM. Effect of leaf incubation temperature profiles onagrobacterium tumefaciens-mediated transient expression. Biotechnol Prog 2015; 31:783-90. [DOI: 10.1002/btpr.2077] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2014] [Revised: 02/18/2015] [Indexed: 11/07/2022]
Affiliation(s)
- Sang-Kyu Jung
- Dept. of Chemical Engineering and Materials Science; University of California; Davis CA 95616
| | - Karen A. McDonald
- Dept. of Chemical Engineering and Materials Science; University of California; Davis CA 95616
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Guan C, Ji J, Jin C, Wang G, Li X, Guan W. Expression of cholera toxin B subunit-lumbrokinase in edible sunflower seeds-the use of transmucosal carrier to enhance its fusion protein's effect on protection of rats and mice against thrombosis. Biotechnol Prog 2014; 30:1029-39. [PMID: 25080206 DOI: 10.1002/btpr.1963] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2014] [Revised: 06/10/2014] [Indexed: 01/26/2023]
Abstract
Lumbrokinase (LK) is a group of serine proteases with strong fibrinolytic and thrombolytic activities and is useful for treating diseases caused by thrombus. Cholera toxin B subunit (CTB) has been widely used to facilitate antigen delivery by serving as an effective mucosal carrier molecule for the induction of oral tolerance. We investigate here the application of CTB as a transmucosal carrier in enhancing its fusion protein-LKs effect to protect rats against thrombosis. Thus, in this study, CTB-LK fusion gene separated by a furin cleavage site was expressed in seeds of Helianthus annuus L. The activity of recombinant protein in seeds of transgenic sunflower was confirmed by Western blot analysis, fibrin plate assays and GM1 -ganglioside ELISA. The thrombosis model of rats and mice revealed that the oral administration of peeled seeds of sunflower expressing CTB-LK had a more significant anti-thrombotic effect on animals compared with that administration of peeled seeds of sunflower expressing LK. It is possible to conclude that CTB can successfully enhance its fusion protein to be absorbed in rats or mice thrombosis model. The use of CTB as a transmucosal carrier in the delivery of transgenic plant-derived oral therapeutic proteins was supported. In addition, for the purpose of that recombinant CTB-LK was designed for oral administration, thus the expression of CTB-LK in edible sunflower seeds eliminated the need for downstream processing of proteins.
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Affiliation(s)
- Chunfeng Guan
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300072, People's Republic of China
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