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| | <StructureSection load='6t0r' size='340' side='right'caption='[[6t0r]], [[Resolution|resolution]] 2.82Å' scene=''> | | <StructureSection load='6t0r' size='340' side='right'caption='[[6t0r]], [[Resolution|resolution]] 2.82Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[6t0r]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Influenza_a_virus_(a/little_yellow-shouldered_bat/guatemala/060/2010(h17n10)) Influenza a virus (a/little yellow-shouldered bat/guatemala/060/2010(h17n10))]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6T0R OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=6T0R FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[6t0r]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Influenza_A_virus_(A/little_yellow-shouldered_bat/Guatemala/060/2010(H17N10)) Influenza A virus (A/little yellow-shouldered bat/Guatemala/060/2010(H17N10))] and [https://en.wikipedia.org/wiki/Synthetic_construct Synthetic construct]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6T0R OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6T0R FirstGlance]. <br> |
| - | </td></tr><tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">PA ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1129347 Influenza A virus (A/little yellow-shouldered bat/Guatemala/060/2010(H17N10))]), PB1 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1129347 Influenza A virus (A/little yellow-shouldered bat/Guatemala/060/2010(H17N10))]), PB2 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1129347 Influenza A virus (A/little yellow-shouldered bat/Guatemala/060/2010(H17N10))])</td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution|Resolution]] 2.82Å</td></tr> |
| - | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/RNA-directed_RNA_polymerase RNA-directed RNA polymerase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.7.48 2.7.7.48] </span></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=6t0r FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6t0r OCA], [https://pdbe.org/6t0r PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6t0r RCSB], [https://www.ebi.ac.uk/pdbsum/6t0r PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6t0r ProSAT]</span></td></tr> |
| - | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=6t0r FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6t0r OCA], [http://pdbe.org/6t0r PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6t0r RCSB], [http://www.ebi.ac.uk/pdbsum/6t0r PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6t0r ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| | + | == Function == |
| | + | [https://www.uniprot.org/uniprot/H6QM92_9INFA H6QM92_9INFA] |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | </div> | | </div> |
| | <div class="pdbe-citations 6t0r" style="background-color:#fffaf0;"></div> | | <div class="pdbe-citations 6t0r" style="background-color:#fffaf0;"></div> |
| | + | |
| | + | ==See Also== |
| | + | *[[RNA polymerase 3D structures|RNA polymerase 3D structures]] |
| | == References == | | == References == |
| | <references/> | | <references/> |
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| | </StructureSection> | | </StructureSection> |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: RNA-directed RNA polymerase]] | + | [[Category: Synthetic construct]] |
| - | [[Category: Cusack, S]] | + | [[Category: Cusack S]] |
| - | [[Category: Kouba, T]] | + | [[Category: Kouba T]] |
| - | [[Category: Wandzik, J M]] | + | [[Category: Wandzik JM]] |
| - | [[Category: Influenza]]
| + | |
| - | [[Category: Polymerase]]
| + | |
| - | [[Category: Rna]]
| + | |
| - | [[Category: Viral protein]]
| + | |
| - | [[Category: Viral transcription]]
| + | |
| Structural highlights
Function
H6QM92_9INFA
Publication Abstract from PubMed
Influenza polymerase uses unique mechanisms to synthesize capped and polyadenylated mRNAs from the genomic viral RNA (vRNA) template, which is packaged inside ribonucleoprotein particles (vRNPs). Here, we visualize by cryoelectron microscopy the conformational dynamics of the polymerase during the complete transcription cycle from pre-initiation to termination, focusing on the template trajectory. After exiting the active site cavity, the template 3' extremity rebinds into a specific site on the polymerase surface. Here, it remains sequestered during all subsequent transcription steps, forcing the template to loop out as it further translocates. At termination, the strained connection between the bound template 5' end and the active site results in polyadenylation by stuttering at uridine 17. Upon product dissociation, further conformational changes release the trapped template, allowing recycling back into the pre-initiation state. Influenza polymerase thus performs transcription while tightly binding to and protecting both template ends, allowing efficient production of multiple mRNAs from a single vRNP.
A Structure-Based Model for the Complete Transcription Cycle of Influenza Polymerase.,Wandzik JM, Kouba T, Karuppasamy M, Pflug A, Drncova P, Provaznik J, Azevedo N, Cusack S Cell. 2020 Apr 16. pii: S0092-8674(20)30389-5. doi: 10.1016/j.cell.2020.03.061. PMID:32304664[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Wandzik JM, Kouba T, Karuppasamy M, Pflug A, Drncova P, Provaznik J, Azevedo N, Cusack S. A Structure-Based Model for the Complete Transcription Cycle of Influenza Polymerase. Cell. 2020 Apr 16. pii: S0092-8674(20)30389-5. doi: 10.1016/j.cell.2020.03.061. PMID:32304664 doi:http://dx.doi.org/10.1016/j.cell.2020.03.061
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