2as8: Difference between revisions

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[[Image:2as8.gif|left|200px]]
{{Seed}}
[[Image:2as8.png|left|200px]]


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{{STRUCTURE_2as8|  PDB=2as8  |  SCENE=  }}  
{{STRUCTURE_2as8|  PDB=2as8  |  SCENE=  }}  


'''Crystal structure of mature and fully active Der p 1 allergen'''
===Crystal structure of mature and fully active Der p 1 allergen===




==Overview==
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BACKGROUND: Der p 1 is a 25-kd allergen with cysteine protease activity. Sensitization to Der p 1 affects a large proportion of individuals with allergy, resulting in rhinitis, asthma, and/or atopic dermatitis. OBJECTIVE: We determined the Der p 1 crystallographic structure to understand the relationships among structure, function, and allergenicity. METHODS: Recombinant pro-Der p 1 was produced in Pichia pastoris and allowed to mature spontaneously before purification by a 2-step procedure. Protease activity was checked by using a fluorogenic peptide substrate. Allergenicity was analysed by IgE binding assays and basophil activation test. The determination of the 3-dimensional structure was obtained by X-ray crystallography at 1.9 A resolution. RESULTS: The recombinant protein is fully active and expresses an allergenicity equivalent to its natural counterpart. Der p 1 exhibits a cysteine protease fold typical of the papain family, has a magnesium binding site, and forms dimers with a large interface. The crystal lattice shows that the dimers are tightly packed in a compact double layer of proteins. Such an assembly likely exists in dry fecal pellets, the natural form of allergen exposure, and appears ideal to interact with cell surface and trigger allergic inflammation. CONCLUSION: We present here the 3-dimensional structural features of mature fully active Der p 1, one of the main allergens involved in human allergic diseases. This opens the possibility to evaluate the importance of enzymatic activity in pathology and possible new therapeutic interventions.
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{{ABSTRACT_PUBMED_16522455}}


==About this Structure==
==About this Structure==
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[[Category: VanderElst, L.]]
[[Category: VanderElst, L.]]
[[Category: Cysteine proteinase fold]]
[[Category: Cysteine proteinase fold]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 29 14:28:01 2008''

Revision as of 11:28, 29 July 2008

File:2as8.png

Template:STRUCTURE 2as8

Crystal structure of mature and fully active Der p 1 allergen

Template:ABSTRACT PUBMED 16522455

About this Structure

2AS8 is a Single protein structure of sequence from Dermatophagoides pteronyssinus. Full crystallographic information is available from OCA.

Reference

Three-dimensional structure and IgE-binding properties of mature fully active Der p 1, a clinically relevant major allergen., de Halleux S, Stura E, VanderElst L, Carlier V, Jacquemin M, Saint-Remy JM, J Allergy Clin Immunol. 2006 Mar;117(3):571-6. Epub 2006 Jan 30. PMID:16522455

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