View source for 7llk


==Cryo-EM structure of Q23.17_DS-SOSIP in complex with Glycan276-Dependent Broadly Neutralizing Antibody 179NC75 Fab==
<StructureSection load='7llk' size='340' side='right'caption='[[7llk]], [[Resolution|resolution]] 4.80&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[7llk]] is a 12 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=7LLK OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7LLK 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]] 4.8&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><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></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=7llk FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7llk OCA], [https://pdbe.org/7llk PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7llk RCSB], [https://www.ebi.ac.uk/pdbsum/7llk PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7llk ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/O55774_9HIV1 O55774_9HIV1] The envelope glyprotein gp160 precursor down-modulates cell surface CD4 antigen by interacting with it in the endoplasmic reticulum and blocking its transport to the cell surface.[RuleBase:RU004292]
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Recognition of N-linked glycan at residue N276 (glycan276) at the periphery of the CD4-binding site (CD4bs) on the HIV-envelope trimer is a formidable challenge for many CD4bs-directed antibodies. To understand how this glycan can be recognized, here we isolate two lineages of glycan276-dependent CD4bs antibodies. Antibody CH540-VRC40.01 (named for donor-lineage.clone) neutralizes 81% of a panel of 208 diverse strains, while antibody CH314-VRC33.01 neutralizes 45%. Cryo-electron microscopy (cryo-EM) structures of these two antibodies and 179NC75, a previously identified glycan276-dependent CD4bs antibody, in complex with HIV-envelope trimer reveal substantially different modes of glycan276 recognition. Despite these differences, binding of glycan276-dependent antibodies maintains a glycan276 conformation similar to that observed in the absence of glycan276-binding antibodies. By contrast, glycan276-independent CD4bs antibodies, such as VRC01, displace glycan276 upon binding. These results provide a foundation for understanding antibody recognition of glycan276 and suggest its presence may be crucial for priming immunogens seeking to initiate broad CD4bs recognition.

Structural basis of glycan276-dependent recognition by HIV-1 broadly neutralizing antibodies.,Cottrell CA, Manne K, Kong R, Wang S, Zhou T, Chuang GY, Edwards RJ, Henderson R, Janowska K, Kopp M, Lin BC, Louder MK, Olia AS, Rawi R, Shen CH, Taft JD, Torres JL, Wu NR, Zhang B, Doria-Rose NA, Cohen MS, Haynes BF, Shapiro L, Ward AB, Acharya P, Mascola JR, Kwong PD Cell Rep. 2021 Nov 2;37(5):109922. doi: 10.1016/j.celrep.2021.109922. PMID:34731616<ref>PMID:34731616</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 7llk" style="background-color:#fffaf0;"></div>

==See Also==
*[[Antibody 3D structures|Antibody 3D structures]]
*[[Gp120 3D structures|Gp120 3D structures]]
*[[Gp41 3D Structures|Gp41 3D Structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Human immunodeficiency virus 1]]
[[Category: Large Structures]]
[[Category: Acharya P]]
[[Category: Manne K]]