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2atm
From Proteopedia
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[[Image:2atm.gif|left|200px]] | [[Image:2atm.gif|left|200px]] | ||
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'''Crystal structure of the recombinant allergen Ves v 2''' | '''Crystal structure of the recombinant allergen Ves v 2''' | ||
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[[Category: Skov, L K.]] | [[Category: Skov, L K.]] | ||
[[Category: Spangfort, M D.]] | [[Category: Spangfort, M D.]] | ||
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| - | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 19:27:47 2008'' | |
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Revision as of 16:27, 3 May 2008
Crystal structure of the recombinant allergen Ves v 2
Overview
Wasp venom from Vespula vulgaris contains three major allergens: Ves v 1, Ves v 2 and Ves v 5. Here, the cloning, expression, biochemical characterization and crystal structure determination of the hyaluronidase Ves v 2 from family 56 of the glycoside hydrolases are reported. The allergen was expressed in Escherichia coli as an insoluble protein and refolded and purified to obtain full enzymatic activity. Three N-glycosylation sites at Asn79, Asn99 and Asn127 were identified in Ves v 2 from a natural source by enzymatic digestions combined with MALDI-TOF mass spectrometry. The crystal structure of recombinant Ves v 2 was determined at 2.0 A resolution and reveals a central (beta/alpha)(7) core that is further stabilized by two disulfide bonds (Cys19-Cys308 and Cys185-Cys197). Based on sequence alignments and structural comparison with the honeybee allergen Api m 2, it is proposed that a conserved cavity near the active site is involved in binding of the substrate. Surface epitopes and putative glycosylation sites have been compared with those of two other major group 2 allergens from Apis mellifera (honeybee) and Dolichovespula maculata (white-faced hornet). The analysis suggests that the harboured allergic IgE-mediated cross-reactivity between Ves v 2 and the allergen from D. maculata is much higher than that between Ves v 2 and the allergen from A. mellifera.
About this Structure
2ATM is a Single protein structure of sequence from Vespula vulgaris. Full crystallographic information is available from OCA.
Reference
Structure of recombinant Ves v 2 at 2.0 Angstrom resolution: structural analysis of an allergenic hyaluronidase from wasp venom., Skov LK, Seppala U, Coen JJ, Crickmore N, King TP, Monsalve R, Kastrup JS, Spangfort MD, Gajhede M, Acta Crystallogr D Biol Crystallogr. 2006 Jun;62(Pt 6):595-604. Epub 2006, May 12. PMID:16699186 Page seeded by OCA on Sat May 3 19:27:47 2008
