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Olive-pollen profilin. Molecular and immunologic properties

A Ledesma1, R Rodríguez, M Villalba

  • 1Depto. Bioquímica y Biología Molecular, Facultad de Química, UCM, Madrid, Spain.

Allergy
|June 24, 1998
PubMed
Summary

Olive pollen profilin is a significant allergen affecting 24% of hypersensitive patients. It shows high cross-reactivity with other pollens due to structural similarities.

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Area of Science:

  • Allergen research
  • Immunology
  • Structural biology

Background:

  • Olive pollen is a common cause of allergic reactions.
  • Profilins are known panallergens found in various plant pollens.
  • Understanding specific profilin allergens is crucial for diagnosis and treatment.

Purpose of the Study:

  • To isolate and characterize olive pollen profilin.
  • To determine its molecular and structural properties.
  • To assess its allergenic potential and cross-reactivity.

Main Methods:

  • Protein isolation and purification techniques.
  • Molecular mass determination (e.g., SDS-PAGE).
  • Amino acid composition analysis.
  • Secondary structure prediction (e.g., CD spectroscopy).
  • Allergenicity assessment through patient recognition frequency and cross-reactivity studies.

Main Results:

  • Olive pollen profilin (15 kDa) was isolated and characterized.
  • Its secondary structure comprises 15% alpha-helix, 33% beta-strand, 20% beta-turn, and 32% random coil.
  • It is recognized by 24% of olive-hypersensitive patients.
  • High cross-reactivity was observed with other pollens, indicating shared conformational epitopes.

Conclusions:

  • Olive pollen profilin is a significant allergen.
  • Its structural similarity to profilins from birch and ash pollen explains cross-reactivity.
  • These findings aid in understanding and diagnosing pollen allergies.

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