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| | ==Crystal structure of a glycosylated beta-1,3-glucanase (HEV B 2), An allergen from Hevea Brasiliensis (Space group P41)== | | ==Crystal structure of a glycosylated beta-1,3-glucanase (HEV B 2), An allergen from Hevea Brasiliensis (Space group P41)== |
| - | <StructureSection load='4iis' size='340' side='right' caption='[[4iis]], [[Resolution|resolution]] 2.67Å' scene=''> | + | <StructureSection load='4iis' size='340' side='right'caption='[[4iis]], [[Resolution|resolution]] 2.67Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[4iis]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Hevea_brasiliensis Hevea brasiliensis]. This structure supersedes the now removed PDB entry [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=3f55 3f55]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4IIS OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4IIS FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[4iis]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Hevea_brasiliensis Hevea brasiliensis]. This structure supersedes the now removed PDB entry [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=3f55 3f55]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4IIS OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4IIS FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CAC:CACODYLATE+ION'>CAC</scene>, <scene name='pdbligand=FLC:CITRATE+ANION'>FLC</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene></td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.6676Å</td></tr> |
| - | <tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=PCA:PYROGLUTAMIC+ACID'>PCA</scene></td></tr>
| + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CAC:CACODYLATE+ION'>CAC</scene>, <scene name='pdbligand=FLC:CITRATE+ANION'>FLC</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene>, <scene name='pdbligand=PCA:PYROGLUTAMIC+ACID'>PCA</scene></td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4hpg|4hpg]]</td></tr>
| + | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=4iis FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4iis OCA], [https://pdbe.org/4iis PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4iis RCSB], [https://www.ebi.ac.uk/pdbsum/4iis PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4iis ProSAT]</span></td></tr> |
| - | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Glucan_endo-1,3-beta-D-glucosidase Glucan endo-1,3-beta-D-glucosidase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.2.1.39 3.2.1.39] </span></td></tr>
| + | |
| - | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4iis FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4iis OCA], [http://pdbe.org/4iis PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4iis RCSB], [http://www.ebi.ac.uk/pdbsum/4iis PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4iis ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| | + | == Function == |
| | + | [https://www.uniprot.org/uniprot/D1M8S7_HEVBR D1M8S7_HEVBR] |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | ==See Also== | | ==See Also== |
| - | *[[Glucanase|Glucanase]] | + | *[[Glucanase 3D structures|Glucanase 3D structures]] |
| | == References == | | == References == |
| | <references/> | | <references/> |
| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Glucan endo-1,3-beta-D-glucosidase]] | |
| | [[Category: Hevea brasiliensis]] | | [[Category: Hevea brasiliensis]] |
| - | [[Category: Hernandez-Santoyo, A]] | + | [[Category: Large Structures]] |
| - | [[Category: Rodriguez-Romero, A]] | + | [[Category: Hernandez-Santoyo A]] |
| - | [[Category: Allergen]] | + | [[Category: Rodriguez-Romero A]] |
| - | [[Category: Carbohydrate/sugar binding]]
| + | |
| - | [[Category: Gh17 family]]
| + | |
| - | [[Category: Glycoprotein]]
| + | |
| - | [[Category: Glycosidase]]
| + | |
| - | [[Category: Glycoside hydrolase]]
| + | |
| - | [[Category: Hydrolase]]
| + | |
| - | [[Category: Latex]]
| + | |
| - | [[Category: Pathogenesis-related class-2 protein]]
| + | |
| - | [[Category: Tim-barrel]]
| + | |
| Structural highlights
4iis is a 4 chain structure with sequence from Hevea brasiliensis. This structure supersedes the now removed PDB entry 3f55. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
| | Method: | X-ray diffraction, Resolution 2.6676Å |
| Ligands: | , , , , |
| Resources: | FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT |
Function
D1M8S7_HEVBR
Publication Abstract from PubMed
Endogenous glycosylated Hev b 2 (endo-beta-1,3-glucanase) from Hevea brasiliensis is an important latex allergen that is recognized by IgE antibodies from patients who suffer from latex allergy. The carbohydrate moieties of Hev b 2 constitute a potentially important IgE-binding epitope that could be responsible for its cross-reactivity. Here, the structure of the endogenous isoform II of Hev b 2 that exhibits three post-translational modifications, including an N-terminal pyroglutamate and two glycosylation sites at Asn27 and at Asn314, is reported from two crystal polymorphs. These modifications form a patch on the surface of the molecule that is proposed to be one of the binding sites for IgE. A structure is also proposed for the most important N-glycan present in this protein as determined by digestion with specific enzymes. To analyze the role of the carbohydrate moieties in IgE antibody binding and in human basophil activation, the glycoallergen was enzymatically deglycosylated and evaluated. Time-lapse automated video microscopy of basophils stimulated with glycosylated Hev b 2 revealed basophil activation and degranulation. Immunological studies suggested that carbohydrates on Hev b 2 represent an allergenic IgE epitope. In addition, a dimer was found in each asymmetric unit that may reflect a regulatory mechanism of this plant defence protein.
Structural analysis of the endogenous glycoallergen Hev b 2 (endo-beta-1,3-glucanase) from Hevea brasiliensis and its recognition by human basophils.,Rodriguez-Romero A, Hernandez-Santoyo A, Fuentes-Silva D, Palomares LA, Munoz-Cruz S, Yepez-Mulia L, Orozco-Martinez S Acta Crystallogr D Biol Crystallogr. 2014 Feb;70(Pt 2):329-41. doi:, 10.1107/S1399004713027673. Epub 2014 Jan 29. PMID:24531467[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Rodriguez-Romero A, Hernandez-Santoyo A, Fuentes-Silva D, Palomares LA, Munoz-Cruz S, Yepez-Mulia L, Orozco-Martinez S. Structural analysis of the endogenous glycoallergen Hev b 2 (endo-beta-1,3-glucanase) from Hevea brasiliensis and its recognition by human basophils. Acta Crystallogr D Biol Crystallogr. 2014 Feb;70(Pt 2):329-41. doi:, 10.1107/S1399004713027673. Epub 2014 Jan 29. PMID:24531467 doi:http://dx.doi.org/10.1107/S1399004713027673
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