1k9u
From Proteopedia
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|PDB= 1k9u |SIZE=350|CAPTION= <scene name='initialview01'>1k9u</scene>, resolution 1.75Å | |PDB= 1k9u |SIZE=350|CAPTION= <scene name='initialview01'>1k9u</scene>, resolution 1.75Å | ||
|SITE= | |SITE= | ||
| - | |LIGAND= <scene name='pdbligand= | + | |LIGAND= <scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene> |
|ACTIVITY= | |ACTIVITY= | ||
|GENE= Phlpr ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=15957 Phleum pratense]) | |GENE= Phlpr ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=15957 Phleum pratense]) | ||
| + | |DOMAIN= | ||
| + | |RELATEDENTRY= | ||
| + | |RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1k9u FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1k9u OCA], [http://www.ebi.ac.uk/pdbsum/1k9u PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1k9u RCSB]</span> | ||
}} | }} | ||
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[[Category: Verdino, P.]] | [[Category: Verdino, P.]] | ||
[[Category: Westritschnig, K.]] | [[Category: Westritschnig, K.]] | ||
| - | [[Category: CA]] | ||
| - | [[Category: SO4]] | ||
[[Category: calcium-binding]] | [[Category: calcium-binding]] | ||
[[Category: cross-reactivity]] | [[Category: cross-reactivity]] | ||
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[[Category: pollen allergen]] | [[Category: pollen allergen]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Mar 30 21:45:30 2008'' |
Revision as of 18:45, 30 March 2008
| |||||||
| , resolution 1.75Å | |||||||
|---|---|---|---|---|---|---|---|
| Ligands: | , | ||||||
| Gene: | Phlpr (Phleum pratense) | ||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
Crystal Structure of the Calcium-Binding Pollen Allergen Phl p 7 (Polcalcin) at 1.75 Angstroem
Overview
The timothy grass pollen allergen Phl p 7 assembles most of the IgE epitopes of a novel family of 2 EF-hand calcium-binding proteins and therefore represents a diagnostic marker allergen and vaccine candidate for immunotherapy. Here we report the first three-dimensional structure of a representative of the 2 EF-hand allergen family, Phl p 7, in the calcium-bound form. The protein occurs as a novel dimer assembly with unique features: in contrast to well known EF-hand proteins such as calmodulin, parvalbumin or the S100 proteins, Phl p 7 adopts an extended conformation. Two protein monomers assemble in a head-to-tail arrangement with domain-swapped EF-hand pairing. The intertwined dimer adopts a barrel-like structure with an extended hydrophobic cavity providing a ligand-binding site. Calcium binding acts as a conformational switch between an open and a closed dimeric form of Phl p 7. These findings are interesting in the context of lipid- and calcium-dependent pollen tube growth. Furthermore, the structure of Phl p 7 allows for the rational development of vaccine strategies for treatment of sensitized allergic patients.
About this Structure
1K9U is a Single protein structure of sequence from Phleum pratense. Full crystallographic information is available from OCA.
Reference
The cross-reactive calcium-binding pollen allergen, Phl p 7, reveals a novel dimer assembly., Verdino P, Westritschnig K, Valenta R, Keller W, EMBO J. 2002 Oct 1;21(19):5007-16. PMID:12356717
Page seeded by OCA on Sun Mar 30 21:45:30 2008
