Expression and analysis of recombinant Amb a V and Amb t V allergens. Comparison with native proteins by immunological assays and NMR spectroscopy

T. Rafnar, B. Ghosh, W. J. Metzler, S. K. Huang, M. P. Perry, L. Mueller, D. G. Marsh

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The Amb V allergens are small, highly disulfide-bonded ragweed pollen allergens that serve as useful models for understanding the molecular basis of the human immune response. We have produced recombinant Amb a V and Amb t V (from short and giant ragweed pollens, respectively) in Escherichia coli and have compared their structural and functional characteristics to those of the native proteins. Recombinant Amb t V was indistinguishable from native Amb t V as determined by NMR spectroscopy and antibody-binding studies. Whereas inhibition analysis showed that recombinant Amb a V possessed only ~50% of the antibody-binding activity of native Amb a V, the two proteins were similarly effective in stimulating Amb a V-specific T-cells. Our results demonstrate that even highly homologous proteins exhibit different abilities to fold into their native three-dimensional conformations and establish the potential and limits of expressing the recombinant Amb V allergens intracellularly in E. coli.

Original languageEnglish
Pages (from-to)21119-21123
Number of pages5
JournalJournal of Biological Chemistry
Issue number29
Publication statusPublished - Jan 1 1992
Externally publishedYes


ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology
  • Cell Biology

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