Download MendeleyStructural characteristics of lipocalin allergens: Crystal structure of the immunogenic dog allergen Can f 6.
Clayton, G.M., White, J., Lee, S., Kappler, J.W., Chan, S.K.(2019) PLoS One 14: e0213052-e0213052
- PubMed: 31525203
- DOI: https://doi.org/10.1371/journal.pone.0213052
- Primary Citation of Related Structures:
6NRE - PubMed Abstract:
Lipocalins represent the most important protein family of the mammalian respiratory allergens. Four of the seven named dog allergens are lipocalins: Can f 1, Can f 2, Can f 4, and Can f 6. We present the structure of Can f 6 along with data on the biophysical and biological activity of this protein in comparison with other animal lipocalins. The Can f 6 structure displays the classic lipocalin calyx-shaped ligand binding cavity within a central β-barrel similar to other lipocalins. Despite low sequence identity between the different dog lipocalin proteins, there is a high degree of structural similarity. On the other hand, Can f 6 has a similar primary sequence to cat, horse, mouse lipocalins as well as a structure that may underlie their cross reactivity. Interestingly, the entrance to the ligand binding pocket is capped by a His instead of the usually seen Tyr that may help select its natural ligand binding partner. Our highly pure recombinant Can f 6 is able to bind to human IgE (hIgE) demonstrating biological antigenicity.
Organizational Affiliation:
Department of Biomedical Research, National Jewish Health, Denver, Colorado, United States of America.
