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| | <StructureSection load='4rsp' size='340' side='right'caption='[[4rsp]], [[Resolution|resolution]] 1.62Å' scene=''> | | <StructureSection load='4rsp' size='340' side='right'caption='[[4rsp]], [[Resolution|resolution]] 1.62Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[4rsp]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Mers Mers]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4RSP OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4RSP FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[4rsp]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Middle_East_respiratory_syndrome-related_coronavirus Middle East respiratory syndrome-related coronavirus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4RSP OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4RSP FirstGlance]. <br> |
| - | </td></tr><tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=BOC:TERT-BUTYL+HYDROGEN+CARBONATE'>BOC</scene>, <scene name='pdbligand=CEV:ETHYL+(4R)-4-AMINO-5-[(3S)-2-OXOPYRROLIDIN-3-YL]PENTANOATE'>CEV</scene>, <scene name='pdbligand=CSO:S-HYDROXYCYSTEINE'>CSO</scene></td></tr> | + | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=BOC:TERT-BUTYL+HYDROGEN+CARBONATE'>BOC</scene>, <scene name='pdbligand=CEV:ETHYL+(4R)-4-AMINO-5-[(3S)-2-OXOPYRROLIDIN-3-YL]PENTANOATE'>CEV</scene>, <scene name='pdbligand=CSO:S-HYDROXYCYSTEINE'>CSO</scene></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">orf1a ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1335626 MERS])</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=4rsp FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4rsp OCA], [https://pdbe.org/4rsp PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4rsp RCSB], [https://www.ebi.ac.uk/pdbsum/4rsp PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4rsp ProSAT]</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=4rsp FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4rsp OCA], [http://pdbe.org/4rsp PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4rsp RCSB], [http://www.ebi.ac.uk/pdbsum/4rsp PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4rsp ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| | + | == Function == |
| | + | [https://www.uniprot.org/uniprot/V9TU12_MERS V9TU12_MERS] Catalytic subunit of viral RNA capping enzyme which catalyzes the RNA guanylyltransferase reaction for genomic and sub-genomic RNAs. The kinase-like NiRAN domain of NSP12 transfers RNA to the amino terminus of NSP9, forming a covalent RNA-protein intermediate. Subsequently, the NiRAN domain transfers RNA to GDP, forming the core cap structure GpppA-RNA. The NSP14 and NSP16 methyltransferases then add methyl groups to form functional cap structures.[ARBA:ARBA00034461] |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | | | |
| | ==See Also== | | ==See Also== |
| - | *[[SARS Coronavirus Main Proteinase|SARS Coronavirus Main Proteinase]] | + | *[[Virus protease 3D structures|Virus protease 3D structures]] |
| | == References == | | == References == |
| | <references/> | | <references/> |
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| | </StructureSection> | | </StructureSection> |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Mers]] | + | [[Category: Middle East respiratory syndrome-related coronavirus]] |
| - | [[Category: Mesecar, A D]] | + | [[Category: Mesecar AD]] |
| - | [[Category: Tomar, S]] | + | [[Category: Tomar S]] |
| - | [[Category: Hydrolase-hydrolase inhibitor complex]]
| + | |
| - | [[Category: Protease]]
| + | |
| Structural highlights
Function
V9TU12_MERS Catalytic subunit of viral RNA capping enzyme which catalyzes the RNA guanylyltransferase reaction for genomic and sub-genomic RNAs. The kinase-like NiRAN domain of NSP12 transfers RNA to the amino terminus of NSP9, forming a covalent RNA-protein intermediate. Subsequently, the NiRAN domain transfers RNA to GDP, forming the core cap structure GpppA-RNA. The NSP14 and NSP16 methyltransferases then add methyl groups to form functional cap structures.[ARBA:ARBA00034461]
Publication Abstract from PubMed
All coronaviruses, including the recently emerged Middle East respiratory syndrome coronavirus (MERS-CoV) from the beta-CoV subgroup, require the proteolytic activity of nsp5 protease (aka 3C-like protease, 3CLpro) during virus replication, making it a high value target for the development of anti-coronavirus therapeutics. Kinetic studies indicate that in contrast to 3CLpro from other beta-CoV 2c members including HKU4 and HKU5, MERS-CoV 3CLpro is less efficient at processing a peptide substrate due to MERS-CoV 3CLpro being a weakly associated dimer. Conversely, HKU4, HKU5 and SARS-CoV 3CLpro enzymes are tightly associated dimers. AUC studies support that MERS-CoV 3CLpro is a weakly associated dimer (Kd ~ 52 mu) with a slow off-rate. Peptidomimetic inhibitors of MERS-CoV 3CLpro were synthesized and utilized in AUC experiments and demonstrate that MERS-CoV 3CLpro undergoes significant ligand-induced dimerization. Kinetic studies also revealed that designed reversible inhibitors act as activators at low compound concentration as a result of induced dimerization. Primary sequence comparisons and X-ray structural analyses of two MERS-CoV 3CLpro-inhibitor complexes, determined to 1.6 A, reveal remarkable structural similarity of the dimer interface with 3CLpro from HKU4-CoV and HKU5-CoV. Despite this structural similarity, substantial differences in the dimerization ability suggest that long-range interactions by the non-conserved amino acids distant from the dimer interface may control MERS-CoV 3CLpro dimerization. Activation of MERS-CoV 3CLpro through ligand-induced dimerization appears to be unique within the genogroup 2c and may potentially increase the complexity in the development of MERS-CoV 3CLpro inhibitors as antiviral agents.
Ligand-induced dimerization of MERS coronavirus nsp5 protease (3CLpro): implications for nsp5 regulation and the development of antivirals.,Tomar S, Johnston ML, St John SE, Osswald HL, Nyalapatla PR, Paul LN, Ghosh AK, Denison MR, Mesecar AD J Biol Chem. 2015 Jun 8. pii: jbc.M115.651463. PMID:26055715[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Tomar S, Johnston ML, St John SE, Osswald HL, Nyalapatla PR, Paul LN, Ghosh AK, Denison MR, Mesecar AD. Ligand-induced dimerization of MERS coronavirus nsp5 protease (3CLpro): implications for nsp5 regulation and the development of antivirals. J Biol Chem. 2015 Jun 8. pii: jbc.M115.651463. PMID:26055715 doi:http://dx.doi.org/10.1074/jbc.M115.651463
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