View source for 6aez


==Crystal structure of human CCL5 trimer==
<StructureSection load='6aez' size='340' side='right'caption='[[6aez]], [[Resolution|resolution]] 1.63&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[6aez]] is a 3 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=6AEZ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6AEZ 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]] 1.63&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><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=6aez FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6aez OCA], [https://pdbe.org/6aez PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6aez RCSB], [https://www.ebi.ac.uk/pdbsum/6aez PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6aez ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/CCL5_HUMAN CCL5_HUMAN] Chemoattractant for blood monocytes, memory T-helper cells and eosinophils. Causes the release of histamine from basophils and activates eosinophils. Binds to CCR1, CCR3, CCR4 and CCR5. One of the major HIV-suppressive factors produced by CD8+ T-cells. Recombinant RANTES protein induces a dose-dependent inhibition of different strains of HIV-1, HIV-2, and simian immunodeficiency virus (SIV). The processed form RANTES(3-68) acts as a natural chemotaxis inhibitor and is a more potent inhibitor of HIV-1-infection. The second processed form RANTES(4-68) exhibits reduced chemotactic and HIV-suppressive activity compared with RANTES(1-68) and RANTES(3-68) and is generated by an unidentified enzyme associated with monocytes and neutrophils.<ref>PMID:16791620</ref> <ref>PMID:1380064</ref> <ref>PMID:8525373</ref> <ref>PMID:9516414</ref> <ref>PMID:15923218</ref> 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
CC-type chemokine ligand 5 (CCL5) is involved in the pathogenesis of many inflammatory conditions. Under physiological conditions, CCL5 oligomerization and aggregation are considered to be responsible for its inflammatory properties. The structural basis of CCL5 oligomerization remains controversial because the current oligomer models contain no consensus interactions. In this study, NMR and biophysical analyses proposed evidence that the CC-type CCL5 dimer acts as the basic unit to constitute the oligomer and that CCL5 oligomerizes alternatively through E66-K25 and E66-R44/K45 interactions. In addition, a newly determined trimer structure, constituted by CCL5 and the E66S mutant, reported an interfacial interaction through the N-terminal (12)FAY(14) sequence. The interaction contributes to CCL5 aggregation and precipitation but not to oligomerization. In accordance with the observations, an integrative model explains the CCL5 oligomerization and aggregation mechanism in which CCL5 assembly consists of two types of dimer-dimer interactions and one aggregation mechanism. For full-length CCL5, the molecular accumulation triggers oligomerization through the E66-K25 and E66-R44/K45 interactions, and the (12)FAY(14) interaction acts as a secondary effect to derive aggregation and precipitation. In contrast, the E66-R44/K45 interaction might dominate in CCL5 N-terminal truncations, and the interaction would lead to the filament-like formation in solution.

Integrative Model to Coordinate the Oligomerization and Aggregation Mechanisms of CCL5.,Chen YC, Chen SP, Li JY, Chen PC, Lee YZ, Li KM, Zarivach R, Sun YJ, Sue SC J Mol Biol. 2020 Feb 14;432(4):1143-1157. doi: 10.1016/j.jmb.2019.12.049. Epub, 2020 Jan 11. PMID:31931012<ref>PMID:31931012</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 6aez" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Chen PJ]]
[[Category: Chen YC]]
[[Category: Li KM]]
[[Category: Sue SC]]
[[Category: Sun YJ]]
[[Category: Zarivach R]]