View source for 2omb


==Bence Jones KWR Protein- Immunoglobulin Light Chain Dimer, P3(1)21 Crystal Form==
<StructureSection load='2omb' size='340' side='right'caption='[[2omb]], [[Resolution|resolution]] 2.90&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[2omb]] is a 4 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=2OMB OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2OMB 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]] 2.9&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=IPH:PHENOL'>IPH</scene>, <scene name='pdbligand=PCA:PYROGLUTAMIC+ACID'>PCA</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</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=2omb FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2omb OCA], [https://pdbe.org/2omb PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2omb RCSB], [https://www.ebi.ac.uk/pdbsum/2omb PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2omb ProSAT]</span></td></tr>
</table>
== 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/om/2omb_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=2omb ConSurf].
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== Publication Abstract from PubMed ==
A Bence Jones protein isolated in the early 1960s from a patient (initials KWR) suffering from plasma-cell dyscrasia was crystallized and its structure was analyzed in four different unit cells by X-ray diffraction. The final models of the molecule in all crystal forms were virtually the same, although the elbow angles relating the constant and variable domains of the Bence Jones dimers varied over a range of 10 degrees. The tetragonal form had an R factor of 22.6% and an R(free) of 28.3% at 2.2 A resolution. Phosphate or sulfate ions (depending on the crystallization conditions) were found in the antigen-combining sites in all crystals, as well as an unidentified ligand tightly bound in the hydrophobic 'deep pocket' beneath the antigen-binding site. The ligand was treated as a phenol molecule. Two trigonal crystal forms were among those solved. One was grown at pH 4.0 and the other was only obtained after sitting for more than eight months at room temperature. The latter crystal was composed of molecules that were degraded in their constant domains. Both low pH and proteolytic degradation of constant domains are known to promote the polymerization of some Bence Jones proteins into amyloid fibrils. Indeed, in both trigonal crystal forms the molecules are organized with pseudo-hexagonal symmetry about the unique crystallographic axes in a manner suggestive of such fibrils. The arrangement of Bence Jones dimers is also consistent with other observations regarding Bence Jones amyloid-fibril structure and current models.

Bence Jones KWR protein structures determined by X-ray crystallography.,Makino DL, Henschen-Edman AH, Larson SB, McPherson A Acta Crystallogr D Biol Crystallogr. 2007 Jul;63(Pt 7):780-92. Epub 2007, Jun 15. PMID:17582169<ref>PMID:17582169</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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== References ==
<references/>
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</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Larson SB]]
[[Category: Makino DL]]
[[Category: McPherson A]]