1h2o
From Proteopedia
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| - | [[Image:1h2o.jpg|left|200px]] | + | [[Image:1h2o.jpg|left|200px]] |
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| - | '''SOLUTION STRUCTURE OF THE MAJOR CHERRY ALLERGEN PRU AV 1 MUTANT E45W''' | + | {{Structure |
| + | |PDB= 1h2o |SIZE=350|CAPTION= <scene name='initialview01'>1h2o</scene> | ||
| + | |SITE= | ||
| + | |LIGAND= | ||
| + | |ACTIVITY= | ||
| + | |GENE= | ||
| + | }} | ||
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| + | '''SOLUTION STRUCTURE OF THE MAJOR CHERRY ALLERGEN PRU AV 1 MUTANT E45W''' | ||
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==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
| - | 1H2O is a [ | + | 1H2O is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Prunus_avium Prunus avium]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1H2O OCA]. |
==Reference== | ==Reference== | ||
| - | Mutational epitope analysis of Pru av 1 and Api g 1, the major allergens of cherry (Prunus avium) and celery (Apium graveolens): correlating IgE reactivity with three-dimensional structure., Neudecker P, Lehmann K, Nerkamp J, Haase T, Wangorsch A, Fotisch K, Hoffmann S, Rosch P, Vieths S, Scheurer S, Biochem J. 2003 Nov 15;376(Pt 1):97-107. PMID:[http:// | + | Mutational epitope analysis of Pru av 1 and Api g 1, the major allergens of cherry (Prunus avium) and celery (Apium graveolens): correlating IgE reactivity with three-dimensional structure., Neudecker P, Lehmann K, Nerkamp J, Haase T, Wangorsch A, Fotisch K, Hoffmann S, Rosch P, Vieths S, Scheurer S, Biochem J. 2003 Nov 15;376(Pt 1):97-107. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/12943529 12943529] |
[[Category: Prunus avium]] | [[Category: Prunus avium]] | ||
[[Category: Single protein]] | [[Category: Single protein]] | ||
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[[Category: structure]] | [[Category: structure]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 11:31:23 2008'' |
Revision as of 09:31, 20 March 2008
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SOLUTION STRUCTURE OF THE MAJOR CHERRY ALLERGEN PRU AV 1 MUTANT E45W
Overview
Birch pollinosis is often accompanied by adverse reactions to food due to pollen-allergen specific IgE cross-reacting with homologous food allergens. The tertiary structure of Pru av 1, the major cherry (Prunus avium) allergen, for example, is nearly identical with Bet v 1, the major birch (Betula verrucosa) pollen allergen. In order to define cross-reactive IgE epitopes, we generated and analysed mutants of Pru av 1 and Api g 1.0101, the major celery (Apium graveolens) allergen, by immunoblotting, EAST (enzyme allergosorbent test), CD and NMR spectroscopy. The mutation of Glu45 to Trp45 in the P-loop region, a known IgE epitope of Bet v 1, significantly reduced IgE binding to Pru av 1 in a subgroup of cherry-allergic patients. The backbone conformation of Pru av 1 wild-type is conserved in the three-dimensional structure of Pru av 1 Trp45, demonstrating that the side chain of Glu45 is involved in a cross-reactive IgE epitope. Accordingly, for a subgroup of celery-allergic patients, IgE binding to the homologous celery allergen Api g 1.0101 was enhanced by the mutation of Lys44 to Glu. The almost complete loss of IgE reactivity to the Pru av 1 Pro112 mutant is due to disruption of its tertiary structure. Neither the mutation Ala112 nor deletion of the C-terminal residues 155-159 influenced IgE binding to Pru av 1. In conclusion, the structure of the P-loop partially explains the cross-reactivity pattern, and modulation of IgE-binding by site-directed mutagenesis is a promising approach to develop hypo-allergenic variants for patient-tailored specific immunotherapy.
About this Structure
1H2O is a Single protein structure of sequence from Prunus avium. Full crystallographic information is available from OCA.
Reference
Mutational epitope analysis of Pru av 1 and Api g 1, the major allergens of cherry (Prunus avium) and celery (Apium graveolens): correlating IgE reactivity with three-dimensional structure., Neudecker P, Lehmann K, Nerkamp J, Haase T, Wangorsch A, Fotisch K, Hoffmann S, Rosch P, Vieths S, Scheurer S, Biochem J. 2003 Nov 15;376(Pt 1):97-107. PMID:12943529
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