View source for 3n06


==A mutant human Prolactin receptor antagonist H27A in complex with the extracellular domain of the human prolactin receptor==
<StructureSection load='3n06' size='340' side='right'caption='[[3n06]], [[Resolution|resolution]] 2.00&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[3n06]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3N06 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3N06 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&#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>, <scene name='pdbligand=NA:SODIUM+ION'>NA</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=3n06 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3n06 OCA], [https://pdbe.org/3n06 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3n06 RCSB], [https://www.ebi.ac.uk/pdbsum/3n06 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3n06 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/PRL_HUMAN PRL_HUMAN] Prolactin acts primarily on the mammary gland by promoting lactation.
== 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/n0/3n06_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=3n06 ConSurf].
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== Publication Abstract from PubMed ==
Human prolactin (hPRL), a member of the family of hematopoietic cytokines, functions as both an endocrine hormone and autocrine/paracrine growth factor. We have previously demonstrated that recognition of the hPRL receptor (hPRLr) depends strongly on solution acidity over the physiologic range from pH 6 &amp;- 8. The hPRL-receptor binding interface contains four histidines, whose protonation is hypothesized to regulate pH-dependent receptor recognition. Here, we systematically dissect its molecular origin by characterizing the consequences of His to Ala mutations on pH-dependent receptor-binding kinetics, site-specific histidine protonation, and high resolution structures of the intermolecular interface. Thermodynamic modeling of the pH dependence to receptor-binding affinity reveals large changes in site-specific protonation constants for a majority of interface histidines upon complexation. Removal of individual His imidazoles reduces these perturbations in protonation constants, which is most likely explained by the introduction of solvent-filled, buried cavities in the crystallographic structures without inducing significant conformational rearrangements.

Two independent histidines, one in human prolactin and one in its receptor, are critical for pH dependent receptor recognition and activation.,Kulkarni MV, Tettamanzi MC, Murphy JW, Keeler C, Myszka DG, Chayen NE, Lolis EJ, Hodsdon ME J Biol Chem. 2010 Sep 30. PMID:20889499<ref>PMID:20889499</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 3n06" style="background-color:#fffaf0;"></div>

==See Also==
*[[Prolactin|Prolactin]]
*[[Prolactin receptor|Prolactin receptor]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Chayen NE]]
[[Category: Hodsdon ME]]
[[Category: Keeler C]]
[[Category: Kulkarni MV]]
[[Category: Lolis EJ]]
[[Category: Murphy JW]]
[[Category: Myszka DG]]
[[Category: Tettamanzi MC]]