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Olive‐pollen profilin. Molecular and immunologic properties

Olive‐pollen profilin has been isolated and characterized as a significant allergen. Its molecular properties, such as a molecular mass of 15 kDa; amino‐acid composition; and secondary repetitive structure percentages of 15%α‐helix, 33%β‐strand, 20%β‐turn, and 32% random coil, have been determined. Its allergenic capability, a recognition frequency estimated at 24% of olive‐hypersensitive patients, and high cross‐reactivity with all the pollen used have been found. The presence of conformational epitopes in the olive profilin, as well as a high structural and immunologic similarity to other pollen sources such as birch and ash, can be established from these studies.