View source for 3drq


==Crystal structure of the HIV-1 broadly neutralizing antibody 2F5 in complex with the gp41 FP-MPER Hyb3K construct 514GIGALFLGFLGAAGS528KK-Ahx-655KNEQELLELDKWASLWN671 soaked in PEG/2-propanol solution==
<StructureSection load='3drq' size='340' side='right'caption='[[3drq]], [[Resolution|resolution]] 2.00&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[3drq]] 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=3DRQ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3DRQ 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=ACA:6-AMINOHEXANOIC+ACID'>ACA</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</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=3drq FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3drq OCA], [https://pdbe.org/3drq PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3drq RCSB], [https://www.ebi.ac.uk/pdbsum/3drq PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3drq ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/Q6PYX1_HUMAN Q6PYX1_HUMAN] 
== 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/dr/3drq_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=3drq ConSurf].
<div style="clear:both"></div>
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== Publication Abstract from PubMed ==
2F5 is a monoclonal antibody with potent and broadly neutralizing activity against HIV-1. It targets the membrane-proximal external region (MPER) of the gp41 subunit of the envelope glycoprotein and interferes with the process of fusion between viral and host cell membranes. This study presents eight 2F5 F(ab)' crystal structures in complex with various gp41 peptide epitopes. These structures reveal several key features of this antibody-antigen interaction. (1) Whenever free of contacts caused by crystal artifacts, the extended complementarity-determining region H3 loop is mobile; this is true for ligand-free and epitope-bound forms. (2) The interaction between the antibody and the gp41 ELDKWA epitope core is absolutely critical, and there are also close and specific contacts with residues located N-terminal to the epitope core. (3) Residues located at the C-terminus of the gp41 ELDKWA core do not interact as tightly with the antibody. However, in the presence of a larger peptide containing the gp41 fusion peptide segment, these residues adopt a conformation consistent with the start of an alpha-helix. (4) At high sulfate concentrations, the electron density maps of 2F5 F(ab)'-peptide complexes contain a peak that may mark a binding site for phosphate groups of negatively charged lipid headgroups. The refined atomic-level details of 2F5 paratope-epitope interactions revealed here should contribute to a better understanding of the mechanism of 2F5-based virus neutralization, in general, and prove important for the design of potential vaccine candidates intended to elicit 2F5-like antibody production.

Structural details of HIV-1 recognition by the broadly neutralizing monoclonal antibody 2F5: epitope conformation, antigen-recognition loop mobility, and anion-binding site.,Julien JP, Bryson S, Nieva JL, Pai EF J Mol Biol. 2008 Dec 12;384(2):377-92. Epub 2008 Sep 18. PMID:18824005<ref>PMID:18824005</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 3drq" style="background-color:#fffaf0;"></div>

==See Also==
*[[Antibody 3D structures|Antibody 3D structures]]
*[[3D structures of human antibody|3D structures of human antibody]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Bryson S]]
[[Category: Julien JP]]
[[Category: Pai EF]]