The major allergen of sesame seeds (Sesamum indicum) is a 2S albumin

Elide A. Pastorello, Elena Varin, Laura Farioli, Valerio Pravettoni, Claudio Ortolani, Chiara Trambaioli, Donatella Fortunato, Maria Gabriella Giuffrida, Federica Rivolta, Anna Robino, Ambra M. Calamari, Luisa Lacava, A. Conti

Research output: Contribution to journalArticlepeer-review

Abstract

Background: Allergic reactions induced by ingestion of foods containing sesame seeds are a well recognized cause of severe food-induced anaphylaxis. Objective: This study aimed to identify and characterize the clinically most important major allergen of sesame seeds. Methods: Sodium dodecyl sulfate-polyacrylamide gel electrophoresis and IgE immunoblotting were performed on sera of 10 patients selected for severe and documented allergic reaction after eating food containing sesame. The major allergen was purified by gel filtration and characterized by isoelectric point (pI), glycosylation and amino acid sequencing. Results: All the patients had positive IgE antibodies and skin prick tests (SPTs) to sesame. The major, clinically most important allergen was a protein with molecular mass of about 9000. It was not glycosylated, the amino acid sequence showed it was a 2S albumin with a pI of 7.3; the small and the large subunits, forming the whole protein, showed pI values of 6.5 and 6.0.

Original languageEnglish
Pages (from-to)85-93
Number of pages9
JournalJournal of Chromatography B: Biomedical Sciences and Applications
Volume756
Issue number1-2
DOIs
Publication statusPublished - May 25 2001

Keywords

  • Albumin
  • Food allergens
  • Sesame seeds

ASJC Scopus subject areas

  • Chemistry(all)

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