Abstract
Pollen allergens interact with the human immune system and the resulting IgE antibodies provide specific probes for their identification and characterisation. In one case, grass allergenic proteins are expressed late in pollen development coincident with the laying down of reserves. Sequence similarity of allergens has indicated possible functions for some allergens. The major birch pollen allergen shows sequence similarity with pathogenesis-related proteins, which form a secondary response in plant host-pathogen interactions and show anti-microbial activity. Some allergens of unknown function are cysteine-rich proteins, while some others have cysteine-rich regions; for example, the major allergen from rye-grass pollen, Lol p 1, has a cysteine-rich N-terminal region, while at the C-terminal region four tryptophan residues together with tyrosine and phenylalanine residues resemble those of cellulose- or sugar-binding domains of other proteins. Several pollen allergens show sequence similarity to cell wall-associated enzymes, while others show hydrolytic enzyme activity often associated with cell walls.
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Knox, R.B., Suphioglu, C. Pollen allergens: development and function. Sexual Plant Reprod 9, 318–323 (1996). https://doi.org/10.1007/BF02441949
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DOI: https://doi.org/10.1007/BF02441949