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[[ | ==STRUCTURE OF THE CAP-BINDING DOMAIN OF INFLUENZA VIRUS POLYMERASE SUBUNIT PB2 WITH BOUND M7GTP== | ||
<StructureSection load='2vqz' size='340' side='right' caption='[[2vqz]], [[Resolution|resolution]] 2.30Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[2vqz]] is a 5 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=2VQZ OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2VQZ FirstGlance]. <br> | |||
</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=MGT:7N-METHYL-8-HYDROGUANOSINE-5-TRIPHOSPHATE'>MGT</scene><br> | |||
<tr><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=MSE:SELENOMETHIONINE'>MSE</scene></td></tr> | |||
<tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2jdq|2jdq]]</td></tr> | |||
<tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2vqz FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2vqz OCA], [http://www.rcsb.org/pdb/explore.do?structureId=2vqz RCSB], [http://www.ebi.ac.uk/pdbsum/2vqz PDBsum]</span></td></tr> | |||
<table> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
Influenza virus mRNAs are synthesized by the trimeric viral polymerase using short capped primers obtained by a 'cap-snatching' mechanism. The polymerase PB2 subunit binds the 5' cap of host pre-mRNAs, which are cleaved after 10-13 nucleotides by the PB1 subunit. Using a library-screening method, we identified an independently folded domain of PB2 that has specific cap binding activity. The X-ray structure of the domain with bound cap analog m(7)GTP at 2.3-A resolution reveals a previously unknown fold and a mode of ligand binding that is similar to, but distinct from, other cap binding proteins. Binding and functional studies with point mutants confirm that the identified site is essential for cap binding in vitro and cap-dependent transcription in vivo by the trimeric polymerase complex. These findings clarify the nature of the cap binding site in PB2 and will allow efficient structure-based design of new anti-influenza compounds inhibiting viral transcription. | |||
The structural basis for cap binding by influenza virus polymerase subunit PB2.,Guilligay D, Tarendeau F, Resa-Infante P, Coloma R, Crepin T, Sehr P, Lewis J, Ruigrok RW, Ortin J, Hart DJ, Cusack S Nat Struct Mol Biol. 2008 May;15(5):500-6. Epub 2008 May 4. PMID:18454157<ref>PMID:18454157</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
==See Also== | ==See Also== | ||
*[[RNA polymerase|RNA polymerase]] | *[[RNA polymerase|RNA polymerase]] | ||
== References == | |||
== | <references/> | ||
< | __TOC__ | ||
</StructureSection> | |||
[[Category: Influenza a virus]] | [[Category: Influenza a virus]] | ||
[[Category: Coloma, R.]] | [[Category: Coloma, R.]] | ||
Revision as of 03:58, 2 October 2014
STRUCTURE OF THE CAP-BINDING DOMAIN OF INFLUENZA VIRUS POLYMERASE SUBUNIT PB2 WITH BOUND M7GTPSTRUCTURE OF THE CAP-BINDING DOMAIN OF INFLUENZA VIRUS POLYMERASE SUBUNIT PB2 WITH BOUND M7GTP
Structural highlights
Publication Abstract from PubMedInfluenza virus mRNAs are synthesized by the trimeric viral polymerase using short capped primers obtained by a 'cap-snatching' mechanism. The polymerase PB2 subunit binds the 5' cap of host pre-mRNAs, which are cleaved after 10-13 nucleotides by the PB1 subunit. Using a library-screening method, we identified an independently folded domain of PB2 that has specific cap binding activity. The X-ray structure of the domain with bound cap analog m(7)GTP at 2.3-A resolution reveals a previously unknown fold and a mode of ligand binding that is similar to, but distinct from, other cap binding proteins. Binding and functional studies with point mutants confirm that the identified site is essential for cap binding in vitro and cap-dependent transcription in vivo by the trimeric polymerase complex. These findings clarify the nature of the cap binding site in PB2 and will allow efficient structure-based design of new anti-influenza compounds inhibiting viral transcription. The structural basis for cap binding by influenza virus polymerase subunit PB2.,Guilligay D, Tarendeau F, Resa-Infante P, Coloma R, Crepin T, Sehr P, Lewis J, Ruigrok RW, Ortin J, Hart DJ, Cusack S Nat Struct Mol Biol. 2008 May;15(5):500-6. Epub 2008 May 4. PMID:18454157[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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