Lipid transfer protein 1 is a possible allergen in Arabidopsis thaliana

被引:14
作者
Chardin, H
Mayer, C
Sénéchal, H
Wal, JM
Poncet, P
Desvaux, FX
Peltre, G
机构
[1] Univ Paris 05, Fac Chirurg Dent, F-92120 Montrouge, France
[2] CNRS, ESPCI, Paris, France
[3] INSERM, ESPCI, Paris, France
[4] Univ Paris 06, Paris, France
关键词
allergens; lipid transfer proteins; Arabidopsis thaliana;
D O I
10.1159/000070923
中图分类号
R392 [医学免疫学];
学科分类号
100102 ;
摘要
Background: The Arabidopsis thaliana genome was recently fully sequenced, and this plant is now considered as the most useful model to study the effects of genetic engineering. The aim of the present study was to identify A. thaliana IgE-binding molecules and to localize their genes in order to evaluate the potential effect of gene insertion on the expression of IgE-binding molecules. Methods: A. thaliana flower proteins were separated by two-dimensional gel electrophoresis and transferred onto a nitrocellulose sheet. The nitrocellulose sheet was successively incubated with human sera known to contain IgE that binds to rapeseed proteins, alkaline phosphatase-conjugated goat anti-human IgE and 5-bromo-4-chloro-3-indolyl phosphate and nitroblue tetrazolium. One allergen was further identified by N-terminal amino acid microsequencing. Results: The results showed that some individuals possessed IgE that recognized numerous proteins with high molecular masses and various isoelectric points. This binding pattern strongly suggests that the epitopes recognized by these IgE could be, at least partly, sugar residues. Otherwise, out of the 10 sera that possessed IgE to Arabidopsis flower proteins, one serum strongly recognized a unique basic protein with an apparent molecular mass of around 14 kD. This protein was identified by amino acid microsequencing as the lipid transfer protein 1 (LTP1). Conclusion: We have demonstrated that A. thaliana LTP1 is IgE reactive. The gene encoding this protein is located on chromosome 2, but it has been described that family 1 of A. thaliana LTPs constitutes a multigenic family with genes located on various chromosomes. Copyright (C) 2003 S. Karger AG, Basel.
引用
收藏
页码:85 / 90
页数:6
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