Protein & Peptide Letters

Prof. Ben M. Dunn  
Department of Biochemistry and Molecular Biology
University of Florida
College of Medicine
P.O. Box 100245
Gainesville, FL
USA
Email: bdunn@ufl.edu

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Evaluation of Different Glycoforms of Honeybee Venom Major Allergen Phospholipase A2 (Api m 1) Produced in Insect Cells

Author(s): Simon Blank, Yvonne Michel, Henning Seismann, Melanie Plum, Kerstin Greunke, Thomas Grunwald, Reinhard Bredehorst, Markus Ollert, Ingke Braren and Edzard Spillner

Affiliation: Institute of Biochemistry and Molecular Biology, Department of Chemistry, University of Hamburg, Martin-Luther-King-Platz 6, 20146 Hamburg, Germany.

Abstract:

Allergic reactions to hymenoptera stings are one of the major reasons for IgE-mediated anaphylaxis. However, proper diagnosis using venom extracts is severely affected by molecular cross-reactivity. In this study recombinant honeybee venom major allergen phospholipase A2 (Api m 1) was produced for the first time in insect cells. Using baculovirus infection of different insect cell lines allergen versions providing a varying degree of cross-reactive carbohydrate determinants as well as a non glycosylated variant could be obtained as secreted soluble proteins in high yields. The resulting molecules were analyzed for their glycosylation and proved to show advantageous properties regarding cross-reactivity in sIgE-based assays. Additionally, in contrast to the enzymatically active native protein the inactivated allergen did not induce IgE-independent effector cell activation. Thus, insect cell-derived recombinant Api m 1 with defined CCD phenotypes might provide further insights into hymenoptera venom IgE reactivities and contribute to an improved diagnosis of hymenoptera venom allergy.

Keywords: Allergen, baculovirus, carbohydrates, cross-reactivity, honeybee, phospholipase, recombinant allergen, venom allergy, Glycoforms, Honeybee Venom, Phospholipase A2, hymenoptera stings, IgE-mediated anaphylaxis, CCD phenotypes, hymenoptera venom, Site Directed Mutagenesis, Recombinant Baculovirus, RBL-SX38, agglutinin, HBV acid phosphatase, MUXF-HASAllergen, baculovirus, carbohydrates, cross-reactivity, honeybee, phospholipase, recombinant allergen, venom allergy, Glycoforms, Honeybee Venom, Phospholipase A2, hymenoptera stings, IgE-mediated anaphylaxis, CCD phenotypes, hymenoptera venom, Site Directed Mutagenesis, Recombinant Baculovirus, RBL-SX38, agglutinin, HBV acid phosphatase, MUXF-HAS

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Article Details

VOLUME: 18
ISSUE: 4
Page: [415 - 422]
Pages: 8
DOI: 10.2174/092986611794653923
Price: $58