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6u0n

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Revision as of 01:04, 7 March 2020

Asymmetrically open conformational state (Class II) of HIV-1 Env trimer BG505 SOSIP.664 in complex with sCD4 and E51 Fab

6u0n, resolution 3.50Å

Structural highlights

6u0n is a 15 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:	6u0l
Gene:	env (9HIV1), CD4 (HUMAN)
Experimental data:	Check to display Experimental Data
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[Q2N0S6_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).[RuleBase:RU004292][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).[SAAS:SAAS000328_004_240990] [CD4_HUMAN] Accessory protein for MHC class-II antigen/T-cell receptor interaction. May regulate T-cell activation. Induces the aggregation of lipid rafts.

Publication Abstract from PubMed

The human immunodeficiency virus (HIV-1) envelope (Env) glycoprotein, a (gp120-gp41)3 trimer, mediates fusion of viral and host cell membranes after gp120 binding to host receptor CD4. Receptor binding triggers conformational changes allowing coreceptor (CCR5) recognition through CCR5's tyrosine-sulfated amino (N) terminus, release of the gp41 fusion peptide and fusion. We present 3.3 A and 3.5 A cryo-EM structures of E51, a tyrosine-sulfated coreceptor-mimicking antibody, complexed with a CD4-bound open HIV-1 native-like Env trimer. Two classes of asymmetric Env interact with E51, revealing tyrosine-sulfated interactions with gp120 mimicking CCR5 interactions, and two conformations of gp120-gp41 protomers (A and B protomers in AAB and ABB trimers) that differ in their degree of CD4-induced trimer opening and induction of changes to the fusion peptide. By integrating the new structural information with previous closed and open envelope trimer structures, we modeled the order of conformational changes on the path to coreceptor binding site exposure and subsequent viral-host cell membrane fusion.

Asymmetric opening of HIV-1 Env bound to CD4 and a coreceptor-mimicking antibody.,Yang Z, Wang H, Liu AZ, Gristick HB, Bjorkman PJ Nat Struct Mol Biol. 2019 Dec;26(12):1167-1175. doi: 10.1038/s41594-019-0344-5., Epub 2019 Dec 2. PMID:31792452^[1]

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

References

↑ Yang Z, Wang H, Liu AZ, Gristick HB, Bjorkman PJ. Asymmetric opening of HIV-1 Env bound to CD4 and a coreceptor-mimicking antibody. Nat Struct Mol Biol. 2019 Dec;26(12):1167-1175. doi: 10.1038/s41594-019-0344-5., Epub 2019 Dec 2. PMID:31792452 doi:http://dx.doi.org/10.1038/s41594-019-0344-5

1 Structural highlights
2 Function
3 Publication Abstract from PubMed
4 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/6u0n"

@@ Line 1: / Line 1: @@
 ==Asymmetrically open conformational state (Class II) of HIV-1 Env trimer BG505 SOSIP.664 in complex with sCD4 and E51 Fab==
-<StructureSection load='6u0n' size='340' side='right'caption='[[6u0n]], [[Resolution|resolution]] 3.50&Aring;' scene=''>
+<SX load='6u0n' size='340' side='right' viewer='molstar' caption='[[6u0n]], [[Resolution|resolution]] 3.50&Aring;' scene=''>
 == Structural highlights ==
 <table><tr><td colspan='2'>[[6u0n]] is a 15 chain structure with sequence from [http://en.wikipedia.org/wiki/9hiv1 9hiv1] and [http://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6U0N OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6U0N FirstGlance]. <br>
@@ Line 24: / Line 24: @@
 <references/>
 __TOC__
-</StructureSection>
+</SX>
 [[Category: Human]]
 [[Category: Large Structures]]

6u0n

From Proteopedia

Revision as of 01:04, 7 March 2020

Asymmetrically open conformational state (Class II) of HIV-1 Env trimer BG505 SOSIP.664 in complex with sCD4 and E51 Fab

Structural highlights

Function

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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