title: Structural and immunological aspects of Polybia scutellaris Antigen 5.
abstract: Vespid venoms contain Antigen 5, an important allergen whose primary structure and immunological behavior have been extensively studied from venoms of vespids of the Northern Hemisphere. We report herein structural and immunological aspects of Antigen 5 from Polybia scutellaris subspecies rioplatensis (vulgar name: camoati) found in South America. Mast cell degranulation, histamine release, and IgE induction experiments performed in mice allow us to suggest that P. scutellaris Antigen 5 is a variant with reduced IgE response and anaphylactic activity. Sequence data indicate that the protein has a 72.5-90.3% similarity to that of members of the vespid Antigen 5 family with an already known primary structure. Moreover, results suggest that the protein-a new member of an extracellular protein superfamily-could be a good candidate for immunotherapy related to vespid allergy.
authors.affiliation: Instituto de Química y Fisicoquímica Biológicas (UBA-CONICET), Junin 956, Universidad de Buenos Aires, Buenos Aires, Argentina.
authors.forename: María L
authors.initials: ML
authors.lastname: Pirpignani
authors.forename: Elena
authors.initials: E
authors.lastname: Rivera
authors.forename: Ulf
authors.initials: U
authors.lastname: Hellman
authors.forename: Mirtha
authors.initials: M
authors.lastname: Biscoglio de Jiménez Bonino
mesh_terms: D000485:Allergens / Q000737:chemistry* / Q000276:immunology*; D000595:Amino Acid Sequence; D000818:Animals; D000941:Antigens / Q000737:chemistry* / Q000276:immunology*; D015550:Cell Degranulation; D003545:Cysteine / Q000378:metabolism; D006031:Glycosylation; D006636:Histamine Release; D007073:Immunoglobulin E / Q000096:biosynthesis; D008297:Male; D008407:Mast Cells / Q000276:immunology; D051379:Mice; D008807:Mice, Inbred BALB C; D008969:Molecular Sequence Data; D010084:Oxidation-Reduction; D017433:Protein Structure, Secondary; D051381:Rats; D017207:Rats, Sprague-Dawley; D016415:Sequence Alignment; D014862:Wasp Venoms / Q000737:chemistry* / Q000276:immunology*; D014863:Wasps / Q000276:immunology*
chemical_list: D000485:Allergens; D000941:Antigens; D014862:Wasp Venoms; C469232:antigen 5, Polybia scutellaris; D007073:Immunoglobulin E; D003545:Cysteine