2nr6: Difference between revisions
New page: left|200px<br /><applet load="2nr6" size="350" color="white" frame="true" align="right" spinBox="true" caption="2nr6, resolution 2.81Å" /> '''Crystal structure of... |
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== | ==Crystal structure of the complex of antibody and the allergen Bla g 2== | ||
<StructureSection load='2nr6' size='340' side='right'caption='[[2nr6]], [[Resolution|resolution]] 2.81Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[2nr6]] is a 6 chain structure with sequence from [https://en.wikipedia.org/wiki/Blattella_germanica Blattella germanica] and [https://en.wikipedia.org/wiki/Mus_musculus Mus musculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2NR6 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2NR6 FirstGlance]. <br> | |||
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.81Å</td></tr> | |||
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CSX:S-OXY+CYSTEINE'>CSX</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></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=2nr6 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2nr6 OCA], [https://pdbe.org/2nr6 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2nr6 RCSB], [https://www.ebi.ac.uk/pdbsum/2nr6 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2nr6 ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[https://www.uniprot.org/uniprot/ASP2_BLAGE ASP2_BLAGE] Functions as a digestive enzyme in the cockroach. | |||
== Evolutionary Conservation == | |||
[[Image:Consurf_key_small.gif|200px|right]] | |||
Check<jmol> | |||
<jmolCheckbox> | |||
<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/nr/2nr6_consurf.spt"</scriptWhenChecked> | |||
<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | |||
<text>to colour the structure by Evolutionary Conservation</text> | |||
</jmolCheckbox> | |||
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=2nr6 ConSurf]. | |||
<div style="clear:both"></div> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
The crystal structure of a 1:1 complex between the German cockroach allergen Bla g 2 and the Fab' fragment of a monoclonal antibody 7C11 was solved at 2.8-angstroms resolution. Bla g 2 binds to the antibody through four loops that include residues 60-70, 83-86, 98-100, and 129-132. Cation-pi interactions exist between Lys-65, Arg-83, and Lys-132 in Bla g 2 and several tyrosines in 7C11. In the complex with Fab', Bla g 2 forms a dimer, which is stabilized by a quasi-four-helix bundle comprised of an alpha-helix and a helical turn from each allergen monomer, exhibiting a novel dimerization mode for an aspartic protease. A disulfide bridge between C51a and C113, unique to the aspartic protease family, connects the two helical elements within each Bla g 2 monomer, thus facilitating formation of the bundle. Mutation of these cysteines, as well as the residues Asn-52, Gln-110, and Ile-114, involved in hydrophobic interactions within the bundle, resulted in a protein that did not dimerize. The mutant proteins induced less beta-hexosaminidase release from mast cells than the wild-type Bla g 2, suggesting a functional role of dimerization in allergenicity. Because 7C11 shares a binding epitope with IgE, the information gained by analysis of the crystal structure of its complex provided guidance for site-directed mutagenesis of the allergen epitope. We have now identified key residues involved in IgE antibody binding; this information will be useful for the design of vaccines for immunotherapy. | |||
Crystal structure of a dimerized cockroach allergen Bla g 2 complexed with a monoclonal antibody.,Li M, Gustchina A, Alexandratos J, Wlodawer A, Wunschmann S, Kepley CL, Chapman MD, Pomes A J Biol Chem. 2008 Aug 15;283(33):22806-14. Epub 2008 Jun 2. PMID:18519566<ref>PMID:18519566</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
<div class="pdbe-citations 2nr6" style="background-color:#fffaf0;"></div> | |||
==See Also== | |||
*[[Monoclonal Antibodies 3D structures|Monoclonal Antibodies 3D structures]] | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Blattella germanica]] | [[Category: Blattella germanica]] | ||
[[Category: Large Structures]] | |||
[[Category: Mus musculus]] | [[Category: Mus musculus]] | ||
[[Category: Gustchina A]] | |||
[[Category: Gustchina | [[Category: Li M]] | ||
[[Category: Li | [[Category: Pomes A]] | ||
[[Category: Pomes | [[Category: Wlodawer A]] | ||
[[Category: Wlodawer | [[Category: Wunschmann S]] | ||
[[Category: | |||
