This old version of Proteopedia is provided for student assignments while the new version is undergoing repairs. Content and edits done in this old version of Proteopedia after March 1, 2026 will eventually be lost when it is retired in about June of 2026.

Apply for new accounts at the new Proteopedia. Your logins will work in both the old and new versions.

6hjn

From Proteopedia

(Difference between revisions)

Jump to: navigation, search

Revision as of 08:41, 10 October 2018

Structure of Influenza Hemagglutinin ectodomain (A/duck/Alberta/35/76)

Structural highlights

6hjn is a 6 chain structure with sequence from I76a4. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	, , , ,
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[Q9WCE0_I76A4] Binds to sialic acid-containing receptors on the cell surface, bringing about the attachment of the virus particle to the cell. This attachment induces virion internalization of about two third of the virus particles through clathrin-dependent endocytosis and about one third through a clathrin- and caveolin-independent pathway. Plays a major role in the determination of host range restriction and virulence. Class I viral fusion protein. Responsible for penetration of the virus into the cell cytoplasm by mediating the fusion of the membrane of the endocytosed virus particle with the endosomal membrane. Low pH in endosomes induces an irreversible conformational change in HA2, releasing the fusion hydrophobic peptide. Several trimers are required to form a competent fusion pore (By similarity).[RuleBase:RU003324][SAAS:SAAS013829_004_327643] [HEMA_I76A4] Binds to sialic acid-containing receptors on the cell surface, bringing about the attachment of the virus particle to the cell. This attachment induces virion internalization of about two third of the virus particles through clathrin-dependent endocytosis and about one third through a clathrin- and caveolin-independent pathway. Plays a major role in the determination of host range restriction and virulence. Class I viral fusion protein. Responsible for penetration of the virus into the cell cytoplasm by mediating the fusion of the membrane of the endocytosed virus particle with the endosomal membrane. Low pH in endosomes induces an irreversible conformational change in HA2, releasing the fusion hydrophobic peptide. Several trimers are required to form a competent fusion pore. Binds to sialic acid-containing receptors on the cell surface, bringing about the attachment of the virus particle to the cell. This attachment induces virion internalization either through clathrin-dependent endocytosis or through clathrin- and caveolin-independent pathway. Plays a major role in the determination of host range restriction and virulence. Class I viral fusion protein. Responsible for penetration of the virus into the cell cytoplasm by mediating the fusion of the membrane of the endocytosed virus particle with the endosomal membrane. Low pH in endosomes induces an irreversible conformational change in HA2, releasing the fusion hydrophobic peptide. Several trimers are required to form a competent fusion pore.[HAMAP-Rule:MF_04072]

Publication Abstract from PubMed

Viruses with membranes fuse them with cellular membranes, to transfer their genomes into cells at the beginning of infection. For Influenza virus, the membrane glycoprotein involved in fusion is the hemagglutinin (HA), the 3D structure of which is known from X-ray crystallographic studies. The soluble ectodomain fragments used in these studies lacked the "membrane anchor" portion of the molecule. Since this region has a role in membrane fusion, we have determined its structure by analyzing the intact, full-length molecule in a detergent micelle, using cryo-EM. We have also compared the structures of full-length HA-detergent micelles with full-length HA-Fab complex detergent micelles, to describe an infectivity-neutralizing monoclonal Fab that binds near the ectodomain membrane anchor junction. We determine a high-resolution HA structure which compares favorably in detail with the structure of the ectodomain seen by X-ray crystallography; we detect, clearly, all five carbohydrate side chains of HA; and we find that the ectodomain is joined to the membrane anchor by flexible, eight-residue-long, linkers. The linkers extend into the detergent micelle to join a central triple-helical structure that is a major component of the membrane anchor.

Influenza hemagglutinin membrane anchor.,Benton DJ, Nans A, Calder LJ, Turner J, Neu U, Lin YP, Ketelaars E, Kallewaard NL, Corti D, Lanzavecchia A, Gamblin SJ, Rosenthal PB, Skehel JJ Proc Natl Acad Sci U S A. 2018 Sep 17. pii: 1810927115. doi:, 10.1073/pnas.1810927115. PMID:30224494^[1]

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

References

↑ Benton DJ, Nans A, Calder LJ, Turner J, Neu U, Lin YP, Ketelaars E, Kallewaard NL, Corti D, Lanzavecchia A, Gamblin SJ, Rosenthal PB, Skehel JJ. Influenza hemagglutinin membrane anchor. Proc Natl Acad Sci U S A. 2018 Sep 17. pii: 1810927115. doi:, 10.1073/pnas.1810927115. PMID:30224494 doi:http://dx.doi.org/10.1073/pnas.1810927115

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/6hjn"

@@ Line 3: / Line 3: @@
 <StructureSection load='6hjn' size='340' side='right' caption='[[6hjn]], [[Resolution|resolution]] 3.30&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[6hjn]] is a 6 chain structure with sequence from [http://en.wikipedia.org/wiki/Influenza_a_virus_(strain_a/duck/alberta/35/1976_h1n1) Influenza a virus (strain a/duck/alberta/35/1976 h1n1)]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6HJN OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6HJN FirstGlance]. <br>
+<table><tr><td colspan='2'>[[6hjn]] is a 6 chain structure with sequence from [http://en.wikipedia.org/wiki/I76a4 I76a4]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6HJN OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6HJN FirstGlance]. <br>
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=BMA:BETA-D-MANNOSE'>BMA</scene>, <scene name='pdbligand=FUC:ALPHA-L-FUCOSE'>FUC</scene>, <scene name='pdbligand=MAN:ALPHA-D-MANNOSE'>MAN</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene>, <scene name='pdbligand=UPL:UNKNOWN+BRANCHED+FRAGMENT+OF+PHOSPHOLIPID'>UPL</scene></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=6hjn FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6hjn OCA], [http://pdbe.org/6hjn PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6hjn RCSB], [http://www.ebi.ac.uk/pdbsum/6hjn PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6hjn ProSAT]</span></td></tr>
@@ Line 22: / Line 22: @@
 __TOC__
 </StructureSection>
+[[Category: I76a4]]
 [[Category: Benton, D J]]
 [[Category: Rosenthal, P B]]

6hjn

From Proteopedia

Revision as of 08:41, 10 October 2018

Structure of Influenza Hemagglutinin ectodomain (A/duck/Alberta/35/76)

Structural highlights

Function

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

Personal tools

Navigation

Search

Toolbox