View source for 6met


==Structural basis of coreceptor recognition by HIV-1 envelope spike==
<SX load='6met' size='340' side='right' viewer='molstar' caption='[[6met]], [[Resolution|resolution]] 4.50&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[6met]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] and [https://en.wikipedia.org/wiki/Human_immunodeficiency_virus_1 Human immunodeficiency virus 1]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6MET OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6MET FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution|Resolution]] 4.5&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=A2G:N-ACETYL-2-DEOXY-2-AMINO-GALACTOSE'>A2G</scene>, <scene name='pdbligand=BMA:BETA-D-MANNOSE'>BMA</scene>, <scene name='pdbligand=MAN:ALPHA-D-MANNOSE'>MAN</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene>, <scene name='pdbligand=TYS:O-SULFO-L-TYROSINE'>TYS</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=6met FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6met OCA], [https://pdbe.org/6met PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6met RCSB], [https://www.ebi.ac.uk/pdbsum/6met PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6met ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/Q70145_9HIV1 Q70145_9HIV1] 
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== Publication Abstract from PubMed ==
HIV-1 envelope glycoprotein (Env), which consists of trimeric (gp160)3 cleaved to (gp120 and gp41)3, interacts with the primary receptor CD4 and a coreceptor (such as chemokine receptor CCR5) to fuse viral and target-cell membranes. The gp120-coreceptor interaction has previously been proposed as the most crucial trigger for unleashing the fusogenic potential of gp41. Here we report a cryo-electron microscopy structure of a full-length gp120 in complex with soluble CD4 and unmodified human CCR5, at 3.9 A resolution. The V3 loop of gp120 inserts into the chemokine-binding pocket formed by seven transmembrane helices of CCR5, and the N terminus of CCR5 contacts the CD4-induced bridging sheet of gp120. CCR5 induces no obvious allosteric changes in gp120 that can propagate to gp41; it does bring the Env trimer close to the target membrane. The N terminus of gp120, which is gripped by gp41 in the pre-fusion or CD4-bound Env, flips back in the CCR5-bound conformation and may irreversibly destabilize gp41 to initiate fusion. The coreceptor probably functions by stabilizing and anchoring the CD4-induced conformation of Env near the cell membrane. These results advance our understanding of HIV-1 entry into host cells and may guide the development of vaccines and therapeutic agents.

Structural basis of coreceptor recognition by HIV-1 envelope spike.,Shaik MM, Peng H, Lu J, Rits-Volloch S, Xu C, Liao M, Chen B Nature. 2018 Dec 12. pii: 10.1038/s41586-018-0804-9. doi:, 10.1038/s41586-018-0804-9. PMID:30542158<ref>PMID:30542158</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 6met" style="background-color:#fffaf0;"></div>

==See Also==
*[[CD4 3D structures|CD4 3D structures]]
== References ==
<references/>
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</SX>
[[Category: Homo sapiens]]
[[Category: Human immunodeficiency virus 1]]
[[Category: Large Structures]]
[[Category: Chen B]]
[[Category: Shaik MM]]