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.

2htq

From Proteopedia

(Difference between revisions)

Jump to: navigation, search

Revision as of 06:45, 27 June 2018

N8 neuraminidase in complex with zanamivir

Structural highlights

2htq is a 1 chain structure with sequence from Influenza a virus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:
Related:	2ht5, 2ht7, 2ht8, 2htr, 2htu, 2htv, 2htw, 2hty, 2hu0, 2hu4
Activity:	Exo-alpha-sialidase, with EC number 3.2.1.18
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[NRAM_I63A3] Catalyzes the removal of terminal sialic acid residues from viral and cellular glycoconjugates. Cleaves off the terminal sialic acids on the glycosylated HA during virus budding to facilitate virus release. Additionally helps virus spread through the circulation by further removing sialic acids from the cell surface. These cleavages prevent self-aggregation and ensure the efficient spread of the progeny virus from cell to cell. Otherwise, infection would be limited to one round of replication. Described as a receptor-destroying enzyme because it cleaves a terminal sialic acid from the cellular receptors. May facilitate viral invasion of the upper airways by cleaving the sialic acid moities on the mucin of the airway epithelial cells. Likely to plays a role in the budding process through its association with lipid rafts during intracellular transport. May additionally display a raft-association independent effect on budding. Plays a role in the determination of host range restriction on replication and virulence. Sialidase activity in late endosome/lysosome traffic seems to enhance virus replication.

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 worldwide spread of H5N1 avian influenza has raised concerns that this virus might acquire the ability to pass readily among humans and cause a pandemic. Two anti-influenza drugs currently being used to treat infected patients are oseltamivir (Tamiflu) and zanamivir (Relenza), both of which target the neuraminidase enzyme of the virus. Reports of the emergence of drug resistance make the development of new anti-influenza molecules a priority. Neuraminidases from influenza type A viruses form two genetically distinct groups: group-1 contains the N1 neuraminidase of the H5N1 avian virus and group-2 contains the N2 and N9 enzymes used for the structure-based design of current drugs. Here we show by X-ray crystallography that these two groups are structurally distinct. Group-1 neuraminidases contain a cavity adjacent to their active sites that closes on ligand binding. Our analysis suggests that it may be possible to exploit the size and location of the group-1 cavity to develop new anti-influenza drugs.

The structure of H5N1 avian influenza neuraminidase suggests new opportunities for drug design.,Russell RJ, Haire LF, Stevens DJ, Collins PJ, Lin YP, Blackburn GM, Hay AJ, Gamblin SJ, Skehel JJ Nature. 2006 Sep 7;443(7107):45-9. Epub 2006 Aug 16. PMID:16915235^[1]

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

References

↑ Russell RJ, Haire LF, Stevens DJ, Collins PJ, Lin YP, Blackburn GM, Hay AJ, Gamblin SJ, Skehel JJ. The structure of H5N1 avian influenza neuraminidase suggests new opportunities for drug design. Nature. 2006 Sep 7;443(7107):45-9. Epub 2006 Aug 16. PMID:16915235 doi:http://dx.doi.org/10.1038/nature05114

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/2htq"

@@ Line 1: / Line 1: @@
 ==N8 neuraminidase in complex with zanamivir==
 <StructureSection load='2htq' size='340' side='right' caption='[[2htq]], [[Resolution|resolution]] 2.20&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[2htq]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/9infa 9infa]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2HTQ OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2HTQ FirstGlance]. <br>
+<table><tr><td colspan='2'>[[2htq]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Influenza_a_virus Influenza a virus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2HTQ OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2HTQ FirstGlance]. <br>
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=ZMR:ZANAMIVIR'>ZMR</scene></td></tr>
 <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2ht5|2ht5]], [[2ht7|2ht7]], [[2ht8|2ht8]], [[2htr|2htr]], [[2htu|2htu]], [[2htv|2htv]], [[2htw|2htw]], [[2hty|2hty]], [[2hu0|2hu0]], [[2hu4|2hu4]]</td></tr>
 <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Exo-alpha-sialidase Exo-alpha-sialidase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.2.1.18 3.2.1.18] </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=2htq FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2htq OCA], [http://pdbe.org/2htq PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2htq RCSB], [http://www.ebi.ac.uk/pdbsum/2htq 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=2htq FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2htq OCA], [http://pdbe.org/2htq PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2htq RCSB], [http://www.ebi.ac.uk/pdbsum/2htq PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=2htq ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 14: / Line 15: @@
 Check<jmol>
   <jmolCheckbox>
-    <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/ht/2htq_consurf.spt"</scriptWhenChecked>
+    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/ht/2htq_consurf.spt"</scriptWhenChecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <text>to colour the structure by Evolutionary Conservation</text>
@@ Line 37: / Line 38: @@
 </StructureSection>
 [[Category: Exo-alpha-sialidase]]
+[[Category: Influenza a virus]]
 [[Category: Blackburn, G M]]
 [[Category: Collins, P J]]

2htq

From Proteopedia

Revision as of 06:45, 27 June 2018

N8 neuraminidase in complex with zanamivir

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

Personal tools

Navigation

Search

Toolbox