2nxz

From Proteopedia

(Difference between revisions)

Revision as of 08:44, 18 October 2017

HIV-1 gp120 Envelope Glycoprotein (T257S, S334A, S375W) Complexed with CD4 and Antibody 17b

Structural highlights

2nxz is a 4 chain structure with sequence from 9hiv1 and Human. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	, , , ,
Related:	1gc1, 1rzj, 1rzk, 2nxy, 2ny0, 2ny1, 2ny2, 2ny3, 2ny4, 2ny5, 2ny6, 2ny7
Gene:	CD4 (HUMAN)
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[Q8QDX5_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 (By similarity).[SAAS:SAAS000328_004_020447] The gp120-gp41 heterodimer allows rapid transcytosis of the virus through CD4 negative cells such as simple epithelial monolayers of the intestinal, rectal and endocervical epithelial barriers. Both gp120 and gp41 specifically recognize glycosphingolipids galactosyl-ceramide (GalCer) or 3' sulfo-galactosyl-ceramide (GalS) present in the lipid rafts structures of epithelial cells. Binding to these alternative receptors allows the rapid transcytosis of the virus through the epithelial cells. This transcytotic vesicle-mediated transport of virions from the apical side to the basolateral side of the epithelial cells does not involve infection of the cells themselves (By similarity). [CD4_HUMAN] Accessory protein for MHC class-II antigen/T-cell receptor interaction. May regulate T-cell activation. Induces the aggregation of lipid rafts.

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

The remarkable diversity, glycosylation and conformational flexibility of the human immunodeficiency virus type 1 (HIV-1) envelope (Env), including substantial rearrangement of the gp120 glycoprotein upon binding the CD4 receptor, allow it to evade antibody-mediated neutralization. Despite this complexity, the HIV-1 Env must retain conserved determinants that mediate CD4 binding. To evaluate how these determinants might provide opportunities for antibody recognition, we created variants of gp120 stabilized in the CD4-bound state, assessed binding of CD4 and of receptor-binding-site antibodies, and determined the structure at 2.3 A resolution of the broadly neutralizing antibody b12 in complex with gp120. b12 binds to a conformationally invariant surface that overlaps a distinct subset of the CD4-binding site. This surface is involved in the metastable attachment of CD4, before the gp120 rearrangement required for stable engagement. A site of vulnerability, related to a functional requirement for efficient association with CD4, can therefore be targeted by antibody to neutralize HIV-1.

Structural definition of a conserved neutralization epitope on HIV-1 gp120.,Zhou T, Xu L, Dey B, Hessell AJ, Van Ryk D, Xiang SH, Yang X, Zhang MY, Zwick MB, Arthos J, Burton DR, Dimitrov DS, Sodroski J, Wyatt R, Nabel GJ, Kwong PD Nature. 2007 Feb 15;445(7129):732-7. PMID:17301785^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Zhou T, Xu L, Dey B, Hessell AJ, Van Ryk D, Xiang SH, Yang X, Zhang MY, Zwick MB, Arthos J, Burton DR, Dimitrov DS, Sodroski J, Wyatt R, Nabel GJ, Kwong PD. Structural definition of a conserved neutralization epitope on HIV-1 gp120. Nature. 2007 Feb 15;445(7129):732-7. PMID:17301785 doi:http://dx.doi.org/10.1038/nature05580

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 See Also
6 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/2nxz"

@@ Line 1: / Line 1: @@
 ==HIV-1 gp120 Envelope Glycoprotein (T257S, S334A, S375W) Complexed with CD4 and Antibody 17b==
 <StructureSection load='2nxz' size='340' side='right' caption='[[2nxz]], [[Resolution|resolution]] 2.04&Aring;' scene=''>
@@ Line 6: / Line 7: @@
 <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1gc1|1gc1]], [[1rzj|1rzj]], [[1rzk|1rzk]], [[2nxy|2nxy]], [[2ny0|2ny0]], [[2ny1|2ny1]], [[2ny2|2ny2]], [[2ny3|2ny3]], [[2ny4|2ny4]], [[2ny5|2ny5]], [[2ny6|2ny6]], [[2ny7|2ny7]]</td></tr>
 <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">CD4 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</td></tr>
-<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2nxz FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2nxz OCA], [http://pdbe.org/2nxz PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2nxz RCSB], [http://www.ebi.ac.uk/pdbsum/2nxz PDBsum]</span></td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2nxz FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2nxz OCA], [http://pdbe.org/2nxz PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2nxz RCSB], [http://www.ebi.ac.uk/pdbsum/2nxz PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=2nxz ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 31: / Line 32: @@
 ==See Also==
-*[[Antibody|Antibody]]
 *[[CD4|CD4]]
-*[[Gp120|Gp120]]
+*[[3D structures of antibody|3D structures of antibody]]
 == References ==
 <references/>

2nxz

From Proteopedia

Revision as of 08:44, 18 October 2017

HIV-1 gp120 Envelope Glycoprotein (T257S, S334A, S375W) Complexed with CD4 and Antibody 17b

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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