Plant-Expressed Recombinant Mountain Cedar Allergen Jun a 1 Is Allergenic and Has Limited Pectate Lyase Activity

Background: Mountain cedar (Juniperus ashei) pollen commonly causes a winter time allergic rhinitis in the central USA. Jun a 1 is the dominant allergenic protein, but biologically active recombinant Jun a 1 has not been successfully expressed, despite numerous attempts with several expression syste...

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Veröffentlicht in:International archives of allergy and immunology 2010-01, Vol.153 (4), p.347-358
Hauptverfasser: Liu, Zun, Bhattacharyya, Shikha, Ning, Bo, Midoro-Horiuti, Terumi, Czerwinski, Edmund W., Goldblum, Randall M., Mort, Andrew, Kearney, Christopher M.
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container_end_page 358
container_issue 4
container_start_page 347
container_title International archives of allergy and immunology
container_volume 153
creator Liu, Zun
Bhattacharyya, Shikha
Ning, Bo
Midoro-Horiuti, Terumi
Czerwinski, Edmund W.
Goldblum, Randall M.
Mort, Andrew
Kearney, Christopher M.
description Background: Mountain cedar (Juniperus ashei) pollen commonly causes a winter time allergic rhinitis in the central USA. Jun a 1 is the dominant allergenic protein, but biologically active recombinant Jun a 1 has not been successfully expressed, despite numerous attempts with several expression systems. Method: Jun a 1 cDNA was inserted into a tobacco mosaic virus vector and transferred to Agrobacterium tumefaciens. Bacteria were syringe-inoculated into leaves of Nicotiana benthamiana (agroinoculation). The interstitial (apoplastic) fluid containing Jun a 1 was isolated. The recombinant protein was analyzed by SDS-PAGE, N-terminal sequencing and MALDI-TOF to confirm identity. Immunogenicity was examined with IgE from allergic patient’s sera, mouse monoclonal anti-Jun a 1 antibodies, IgE-binding inhibition and by degranulation of RBL SX-38 cells sensitized with sera from allergic patients. Pectate lyase activity was assayed by capillary zone electrophoresis and mass spectrometry analysis. Results: Recombinant Jun a 1 was recovered in good quantity (100 µg/g leaf material), was confirmed as Jun a 1, bound IgE from sera from cedar hypersensitive patients and inhibited IgE binding to native Jun a 1. Jun a 1 mutants were created and their pectate lyase activity quantified. For the first time, Jun a 1 pectate lyase activity was demonstrated, which may explain the necrosis seen on host plants, which was similar to that of control plants expressing banana pectate lyase. Conclusions: A means of producing recombinant Jun a 1 is now available for structure/function studies and potentially for diagnostic and therapeutic uses.
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Jun a 1 is the dominant allergenic protein, but biologically active recombinant Jun a 1 has not been successfully expressed, despite numerous attempts with several expression systems. Method: Jun a 1 cDNA was inserted into a tobacco mosaic virus vector and transferred to Agrobacterium tumefaciens. Bacteria were syringe-inoculated into leaves of Nicotiana benthamiana (agroinoculation). The interstitial (apoplastic) fluid containing Jun a 1 was isolated. The recombinant protein was analyzed by SDS-PAGE, N-terminal sequencing and MALDI-TOF to confirm identity. Immunogenicity was examined with IgE from allergic patient’s sera, mouse monoclonal anti-Jun a 1 antibodies, IgE-binding inhibition and by degranulation of RBL SX-38 cells sensitized with sera from allergic patients. Pectate lyase activity was assayed by capillary zone electrophoresis and mass spectrometry analysis. Results: Recombinant Jun a 1 was recovered in good quantity (100 µg/g leaf material), was confirmed as Jun a 1, bound IgE from sera from cedar hypersensitive patients and inhibited IgE binding to native Jun a 1. Jun a 1 mutants were created and their pectate lyase activity quantified. For the first time, Jun a 1 pectate lyase activity was demonstrated, which may explain the necrosis seen on host plants, which was similar to that of control plants expressing banana pectate lyase. Conclusions: A means of producing recombinant Jun a 1 is now available for structure/function studies and potentially for diagnostic and therapeutic uses.</description><identifier>ISSN: 1018-2438</identifier><identifier>EISSN: 1423-0097</identifier><identifier>DOI: 10.1159/000316345</identifier><identifier>PMID: 20559000</identifier><language>eng</language><publisher>Basel, Switzerland: Karger</publisher><subject>Agrobacterium tumefaciens ; Agrobacterium tumefaciens - genetics ; Allergens - genetics ; Allergens - immunology ; Allergens - isolation &amp; purification ; Allergens - metabolism ; Allergies ; Animals ; Antigens, Plant ; Basophils - immunology ; Basophils - metabolism ; Basophils - pathology ; Biological and medical sciences ; Cell Degranulation ; Cell Line ; Fundamental and applied biological sciences. 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Jun a 1 is the dominant allergenic protein, but biologically active recombinant Jun a 1 has not been successfully expressed, despite numerous attempts with several expression systems. Method: Jun a 1 cDNA was inserted into a tobacco mosaic virus vector and transferred to Agrobacterium tumefaciens. Bacteria were syringe-inoculated into leaves of Nicotiana benthamiana (agroinoculation). The interstitial (apoplastic) fluid containing Jun a 1 was isolated. The recombinant protein was analyzed by SDS-PAGE, N-terminal sequencing and MALDI-TOF to confirm identity. Immunogenicity was examined with IgE from allergic patient’s sera, mouse monoclonal anti-Jun a 1 antibodies, IgE-binding inhibition and by degranulation of RBL SX-38 cells sensitized with sera from allergic patients. Pectate lyase activity was assayed by capillary zone electrophoresis and mass spectrometry analysis. Results: Recombinant Jun a 1 was recovered in good quantity (100 µg/g leaf material), was confirmed as Jun a 1, bound IgE from sera from cedar hypersensitive patients and inhibited IgE binding to native Jun a 1. Jun a 1 mutants were created and their pectate lyase activity quantified. For the first time, Jun a 1 pectate lyase activity was demonstrated, which may explain the necrosis seen on host plants, which was similar to that of control plants expressing banana pectate lyase. Conclusions: A means of producing recombinant Jun a 1 is now available for structure/function studies and potentially for diagnostic and therapeutic uses.</description><subject>Agrobacterium tumefaciens</subject><subject>Agrobacterium tumefaciens - genetics</subject><subject>Allergens - genetics</subject><subject>Allergens - immunology</subject><subject>Allergens - isolation &amp; purification</subject><subject>Allergens - metabolism</subject><subject>Allergies</subject><subject>Animals</subject><subject>Antigens, Plant</subject><subject>Basophils - immunology</subject><subject>Basophils - metabolism</subject><subject>Basophils - pathology</subject><subject>Biological and medical sciences</subject><subject>Cell Degranulation</subject><subject>Cell Line</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>Fundamental immunology</subject><subject>Genetic Vectors - genetics</subject><subject>Humans</subject><subject>Immunoglobulin E - metabolism</subject><subject>Immunopathology</subject><subject>Juniperus - immunology</subject><subject>Juniperus ashei</subject><subject>Medical sciences</subject><subject>Musa</subject><subject>Mutagenesis, Site-Directed</subject><subject>Mutation - genetics</subject><subject>Nicotiana</subject><subject>Nicotiana benthamiana</subject><subject>Original Paper</subject><subject>Plant Proteins - genetics</subject><subject>Plant Proteins - immunology</subject><subject>Plant Proteins - isolation &amp; purification</subject><subject>Plant Proteins - metabolism</subject><subject>Pollen</subject><subject>Polysaccharide-Lyases - metabolism</subject><subject>Protein Binding</subject><subject>Rats</subject><subject>Recombinant Proteins - genetics</subject><subject>Rhinitis, Allergic, Seasonal - immunology</subject><subject>Sarcoidosis. 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Jun a 1 is the dominant allergenic protein, but biologically active recombinant Jun a 1 has not been successfully expressed, despite numerous attempts with several expression systems. Method: Jun a 1 cDNA was inserted into a tobacco mosaic virus vector and transferred to Agrobacterium tumefaciens. Bacteria were syringe-inoculated into leaves of Nicotiana benthamiana (agroinoculation). The interstitial (apoplastic) fluid containing Jun a 1 was isolated. The recombinant protein was analyzed by SDS-PAGE, N-terminal sequencing and MALDI-TOF to confirm identity. Immunogenicity was examined with IgE from allergic patient’s sera, mouse monoclonal anti-Jun a 1 antibodies, IgE-binding inhibition and by degranulation of RBL SX-38 cells sensitized with sera from allergic patients. Pectate lyase activity was assayed by capillary zone electrophoresis and mass spectrometry analysis. Results: Recombinant Jun a 1 was recovered in good quantity (100 µg/g leaf material), was confirmed as Jun a 1, bound IgE from sera from cedar hypersensitive patients and inhibited IgE binding to native Jun a 1. Jun a 1 mutants were created and their pectate lyase activity quantified. For the first time, Jun a 1 pectate lyase activity was demonstrated, which may explain the necrosis seen on host plants, which was similar to that of control plants expressing banana pectate lyase. Conclusions: A means of producing recombinant Jun a 1 is now available for structure/function studies and potentially for diagnostic and therapeutic uses.</abstract><cop>Basel, Switzerland</cop><pub>Karger</pub><pmid>20559000</pmid><doi>10.1159/000316345</doi><tpages>12</tpages><oa>free_for_read</oa></addata></record>
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ispartof International archives of allergy and immunology, 2010-01, Vol.153 (4), p.347-358
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source MEDLINE; Karger_医学期刊; Alma/SFX Local Collection
subjects Agrobacterium tumefaciens
Agrobacterium tumefaciens - genetics
Allergens - genetics
Allergens - immunology
Allergens - isolation & purification
Allergens - metabolism
Allergies
Animals
Antigens, Plant
Basophils - immunology
Basophils - metabolism
Basophils - pathology
Biological and medical sciences
Cell Degranulation
Cell Line
Fundamental and applied biological sciences. Psychology
Fundamental immunology
Genetic Vectors - genetics
Humans
Immunoglobulin E - metabolism
Immunopathology
Juniperus - immunology
Juniperus ashei
Medical sciences
Musa
Mutagenesis, Site-Directed
Mutation - genetics
Nicotiana
Nicotiana benthamiana
Original Paper
Plant Proteins - genetics
Plant Proteins - immunology
Plant Proteins - isolation & purification
Plant Proteins - metabolism
Pollen
Polysaccharide-Lyases - metabolism
Protein Binding
Rats
Recombinant Proteins - genetics
Rhinitis, Allergic, Seasonal - immunology
Sarcoidosis. Granulomatous diseases of unproved etiology. Connective tissue diseases. Elastic tissue diseases. Vasculitis
Tobacco mosaic virus
Tobacco Mosaic Virus - genetics
Trees
title Plant-Expressed Recombinant Mountain Cedar Allergen Jun a 1 Is Allergenic and Has Limited Pectate Lyase Activity
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