| Autor: |
H, Breiteneder, S, Sowka, S, Wagner, M, Krebitz, C, Hafner, T, Kinaciyan, H Y, Yeang, O, Scheiner |
| Rok vydání: |
1999 |
| Předmět: |
|
| Zdroj: |
International archives of allergy and immunology. 118(2-4) |
| ISSN: |
1018-2438 |
| Popis: |
The 43-kD latex allergen Hev b 7 was purified from the latex of Hevea brasiliensis and identified by N-terminal and internal peptide sequences as highly homologous to patatins. Patatins are storage proteins encoded by a multigene family found in plants such as potato and tomato. We have obtained a cDNA clone coding for a cytoplasmic form of Hev b 7. The recombinant protein was expressed in the methylotrophic yeast Pichia pastoris at 10 mg/l culture supernatant. Both natural Hev b 7 and rHev b 7 were recognized by IgE in 11% of the latex-allergic patients. rHev b 7 inhibited binding to its counterpart in natural rubber latex extracts. Purified rHev b 7 used at concentrations of 10 micrograms/ml in skin prick tests produced wheal-and-flare reactions of sizes equal to those produced by nHev b 7. Furthermore, we were able to show that rHev b 7 possessed esterase activity. A plant expression system for the production of larger quantities of recombinant latex allergens as an alternative to the preparation from H. brasiliensis sap is discussed. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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