View source for 2lm9


==The NMR structure of a major allergen from dust mite==
<StructureSection load='2lm9' size='340' side='right'caption='[[2lm9]]' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[2lm9]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Blomia_tropicalis Blomia tropicalis]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2LM9 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2LM9 FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Solution NMR</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=2lm9 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2lm9 OCA], [https://pdbe.org/2lm9 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2lm9 RCSB], [https://www.ebi.ac.uk/pdbsum/2lm9 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2lm9 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/ALL21_BLOTA ALL21_BLOTA] 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Blo t 21 is a paralogue of the group 5 allergen, Blo t 5, a major allergen from the dust mite Blomia tropicalis. Blo t 21 has moderate sequence identity (40.7%) to Blo t 5 and low-to-moderate cross-reactivity to Blo t 5. In B. tropicalis, the most prevalent and allergenic allergens are in the order of Blo t 21, Blo t 5 and Blo t 7. Here, we determined the NMR solution structure of Blo t 21 which represents the first structure of the group 21 dust mite allergen. The structure of Blo t 21 closely resembles the structures of Blo t 5 and Der p 5, comprising three anti-parallel alpha-helices arranged in a helical bundle. Using site-directed mutagenesis and specific IgE binding ELISA, Blo t 21 was found to contain both conserved and unique charged IgE eptope residues at the L2 loop region and on helix alpha3. Cross-inhibition assays confirmed that Blo t 21 has a low-to-moderate cross-reactivity with Blo t 5 and Der p 5 and represents a novel group of major allergen in B. tropicalis. In addition to group 5 allergens, Blo t 21 has also a low-to-moderate cross-reactivity with group 21 allergens from Dermatophagoides mites, confirming that B. tropicalis is a major and distinct source of dust mite allergens.

NMR structure and IgE epitopes of Blo t 21, a major dust mite allergen from Blomia tropicalis.,Tan KW, Ong TC, Gao YF, Tiong YS, Wong KN, Chew FT, Mok YK J Biol Chem. 2012 Aug 10. PMID:22887997<ref>PMID:22887997</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 2lm9" style="background-color:#fffaf0;"></div>
== References ==
<references/>
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</StructureSection>
[[Category: Blomia tropicalis]]
[[Category: Large Structures]]
[[Category: Mok YK]]
[[Category: Tan KW]]