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.

1l7g

From Proteopedia

(Difference between revisions)

Jump to: navigation, search

Revision as of 15:24, 10 September 2015

Crystal structure of E119G mutant influenza virus neuraminidase in complex with BCX-1812

Structural highlights

1l7g is a 1 chain structure with sequence from 9infa. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	, , , , ,
Related:	1l7f, 1l7h
Activity:	Exo-alpha-sialidase, with EC number 3.2.1.18
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum

Function

[NRAM_I75A5] 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

Zanamivir and oseltamivir, specific inhibitors of influenza virus neuraminidase, have significantly different characteristics in resistance studies. In both cases resistance is known to arise through mutations in either the hemagglutinin or neuraminidase surface proteins. A new inhibitor under development by Biocryst Pharmaceuticals, BCX-1812, has both a guanidino group, as in zanamivir, and a bulky hydrophobic group, as in oseltamivir. Using influenza A/NWS/Tern/Australia/G70C/75 (H1N9), neuraminidase variants E119G and R292K have previously been selected by different inhibitors. The sensitivity of these variants to BCX-1812 has now been measured and found in both cases to be intermediate between those of zanamivir and oseltamivir. In addition, the X-ray crystal structures of the complexes of BCX-1812 with the wild type and the two mutant neuraminidases were determined. The ligand is bound in an identical manner in each structure, with a rearrangement of the side chain of E276 from its ligand-free position. A structural explanation of the mechanism of resistance of BCX-1812, relative to zanamivir and oseltamivir in particular, is provided.

Structural studies of the resistance of influenza virus neuramindase to inhibitors.,Smith BJ, McKimm-Breshkin JL, McDonald M, Fernley RT, Varghese JN, Colman PM J Med Chem. 2002 May 23;45(11):2207-12. PMID:12014958^[1]

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

References

↑ Smith BJ, McKimm-Breshkin JL, McDonald M, Fernley RT, Varghese JN, Colman PM. Structural studies of the resistance of influenza virus neuramindase to inhibitors. J Med Chem. 2002 May 23;45(11):2207-12. PMID:12014958

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/1l7g"

@@ Line 2: / Line 2: @@
 <StructureSection load='1l7g' size='340' side='right' caption='[[1l7g]], [[Resolution|resolution]] 1.85&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[1l7g]] 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=1L7G OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1L7G FirstGlance]. <br>
+<table><tr><td colspan='2'>[[1l7g]] 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=1L7G OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1L7G FirstGlance]. <br>
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=BCZ:3-(1-ACETYLAMINO-2-ETHYL-BUTYL)-4-GUANIDINO-2-HYDROXY-CYCLOPENTANECARBOXYLIC+ACID'>BCZ</scene>, <scene name='pdbligand=BMA:BETA-D-MANNOSE'>BMA</scene>, <scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene>, <scene name='pdbligand=MAN:ALPHA-D-MANNOSE'>MAN</scene></td></tr>
 <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1l7f|1l7f]], [[1l7h|1l7h]]</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=1l7g FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1l7g OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1l7g RCSB], [http://www.ebi.ac.uk/pdbsum/1l7g 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=1l7g FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1l7g OCA], [http://pdbe.org/1l7g PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1l7g RCSB], [http://www.ebi.ac.uk/pdbsum/1l7g PDBsum]</span></td></tr>
 </table>
 == Function ==
@@ Line 28: / Line 28: @@
 From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 </div>
+<div class="pdbe-citations 1l7g" style="background-color:#fffaf0;"></div>
 ==See Also==
@@ Line 36: / Line 37: @@
 </StructureSection>
 [[Category: Exo-alpha-sialidase]]
-[[Category: Influenza a virus]]
 [[Category: Colman, P M]]
 [[Category: Fernley, R T]]

1l7g

From Proteopedia

Revision as of 15:24, 10 September 2015

Crystal structure of E119G mutant influenza virus neuraminidase in complex with BCX-1812

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