3b7e: Difference between revisions

<StructureSection load='3b7e' size='340' side='right' caption='[[3b7e]], [[Resolution|resolution]] 1.45&Aring;' scene=''>

<table><tr><td colspan='2'>[[3b7e]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/9infa 9infa]. The May 2009 RCSB PDB [http://pdb.rcsb.org/pdb/static.do?p=education_discussion/molecule_of_the_month/index.html Molecule of the Month] feature on ''Influenza Neuraminidase''  by David Goodsell is [http://dx.doi.org/10.2210/rcsb_pdb/mom_2009_5 10.2210/rcsb_pdb/mom_2009_5]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3B7E OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3B7E FirstGlance]. <br>

</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=FUC:ALPHA-L-FUCOSE'>FUC</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene>, <scene name='pdbligand=ZMR:ZANAMIVIR'>ZMR</scene></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=3b7e FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3b7e OCA], [http://pdbe.org/3b7e PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3b7e RCSB], [http://www.ebi.ac.uk/pdbsum/3b7e PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3b7e ProSAT]</span></td></tr>

[[http://www.uniprot.org/uniprot/NRAM_I18A0 NRAM_I18A0]] 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 (By similarity).  Unlike other strains, A/WSN/33 neuraminidase binds and activates plasminogen into plasmin in the vicinity of HA so that activated plasmin cleaves HA rendering the virus infectious (By similarity).  

*[[Teaching Scenes%2C Tutorials%2C and Educators' Pages|Teaching Scenes%2C Tutorials%2C and Educators' Pages]]

*[[Zanamivir|Zanamivir]]

[[Category: Exo-alpha-sialidase]]

[[Category: Wilson, I A]]

[[Category: Xu, X]]

[[Category: Zhu, X]]

[[Category: Virion]]