View source for 29sj


==Three viral endonucleases bound to the same inhibitor (9-hydroxy-3,4-dihydro-2H-pyrazino[1,2-c]pyrimidine-1,8-dione derivative). (1a) Influenza virus A/pH1N1 PA subunit endonuclease with magnesium ions.==
<StructureSection load='29sj' size='340' side='right'caption='[[29sj]], [[Resolution|resolution]] 1.86&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[29sj]] is a 2 chain structure with sequence from [https://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=29SJ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=29SJ FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.86&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=A1J4F:9-oxidanyl-6-[(1-phenylcyclohexyl)methyl]-2-propan-2-yl-3,4-dihydropyrazino[1,2-c]pyrimidine-1,8-dione'>A1J4F</scene>, <scene name='pdbligand=CME:S,S-(2-HYDROXYETHYL)THIOCYSTEINE'>CME</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=29sj FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=29sj OCA], [https://pdbe.org/29sj PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=29sj RCSB], [https://www.ebi.ac.uk/pdbsum/29sj PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=29sj ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/PA_I09A0 PA_I09A0] Plays an essential role in viral RNA transcription and replication by forming the heterotrimeric polymerase complex together with PB1 and PB2 subunits. The complex transcribes viral mRNAs by using a unique mechanism called cap-snatching. It consists in the hijacking and cleavage of host capped pre-mRNAs. These short capped RNAs are then used as primers for viral mRNAs. The PB2 subunit is responsible for the binding of the 5' cap of cellular pre-mRNAs which are subsequently cleaved after 10-13 nucleotides by the PA subunit that carries the endonuclease activity.[HAMAP-Rule:MF_04063]
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</StructureSection>
[[Category: Influenza A virus]]
[[Category: Large Structures]]
[[Category: Cusack S]]
[[Category: Gaudon S]]