View source for 3cz2


==Dimeric crystal structure of a pheromone binding protein from Apis mellifera at pH 7.0==
<StructureSection load='3cz2' size='340' side='right'caption='[[3cz2]], [[Resolution|resolution]] 2.50&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[3cz2]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Apis_mellifera Apis mellifera]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3CZ2 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3CZ2 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]] 2.5&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CL:CHLORIDE+ION'>CL</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=3cz2 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3cz2 OCA], [https://pdbe.org/3cz2 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3cz2 RCSB], [https://www.ebi.ac.uk/pdbsum/3cz2 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3cz2 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/Q9U9J6_APIME Q9U9J6_APIME] 
== 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/cz/3cz2_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.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=3cz2 ConSurf].
<div style="clear:both"></div>
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== Publication Abstract from PubMed ==
In honeybee (Apis mellifera) societies, the queen controls the development and the caste status of the members of the hive. Queen bees secrete pheromonal blends comprising 10 or more major and minor components, mainly hydrophobic. The major component, 9-keto-2(E)-decenoic acid (9-ODA), acts on the workers and male bees (drones), eliciting social or sexual responses. 9-ODA is captured in the antennal lymph and transported to the pheromone receptor(s) in the sensory neuron membranes by pheromone binding proteins (PBPs). A key issue is to understand how the pheromone, once tightly bound to its PBP, is released to activate the receptor. We report here on the structure at physiological pH of the main antennal PBP, ASP1, identified in workers and male honeybees, in its apo or complexed form, particularly with the main component of the queen mandibular pheromonal mixture (9-ODA). Contrary to the ASP1 structure at low pH, the ASP1 structure at pH 7.0 is a domain-swapped dimer with one or two ligands per monomer. This dimerization is disrupted by a unique residue mutation since Asp35 Asn and Asp35 Ala mutants remain monomeric at pH 7.0, as does native ASP1 at pH 4.0. Asp35 is conserved in only approximately 30% of medium-chain PBPs and is replaced by other residues, such as Asn, Ala and Ser, among others, thus excluding that they may perform domain swapping. Therefore, these different medium-chain PBPs, as well as PBPs from moths, very likely exhibit different mechanisms of ligand release or receptor recognition.

Queen bee pheromone binding protein pH-induced domain swapping favors pheromone release.,Pesenti ME, Spinelli S, Bezirard V, Briand L, Pernollet JC, Campanacci V, Tegoni M, Cambillau C J Mol Biol. 2009 Jul 31;390(5):981-90. Epub 2009 May 28. PMID:19481550<ref>PMID:19481550</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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<div class="pdbe-citations 3cz2" style="background-color:#fffaf0;"></div>

==See Also==
*[[Pheromone binding protein|Pheromone binding protein]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Apis mellifera]]
[[Category: Large Structures]]
[[Category: Bezirard V]]
[[Category: Briand L]]
[[Category: Cambillau C]]
[[Category: Pernollet JC]]
[[Category: Pesenti ME]]
[[Category: Spinelli S]]
[[Category: Tegoni M]]