Odorant-binding proteins are small, water-soluble proteins that solubilize hydrophobic odorant molecules to facilitate their transport to their receptors. The OS-D family is named after a protein identified in the antenna of Drosphila melanogaster. Homologues of OS-D are wide-spread among insects . They share features with vertebrate odorant-binding proteins but show no sequence similarities.
Tha p 1, a major allergen from pine processionary caterpillar belongs to the OS-D family .
Family-defining Pfam domains (at least one of these domains is present in each family member):
|Pfam domain||Pfam clan|
|PF03392||Insect pheromone-binding family, A10/OS-D||-|
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