4rsp
From Proteopedia
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| - | '''Unreleased structure''' | ||
| - | + | ==X-ray structure of MERS-CoV nsp5 protease bound with a designed inhibitor== | |
| + | <StructureSection load='4rsp' size='340' side='right'caption='[[4rsp]], [[Resolution|resolution]] 1.62Å' scene=''> | ||
| + | == Structural highlights == | ||
| + | <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='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.62Å</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='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> | ||
| + | </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;"> | ||
| + | == 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<ref>PMID:26055715</ref> | |
| - | + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |
| - | [[Category: | + | </div> |
| - | [[Category: Mesecar | + | <div class="pdbe-citations 4rsp" style="background-color:#fffaf0;"></div> |
| - | [[Category: Tomar | + | |
| + | ==See Also== | ||
| + | *[[Virus protease 3D structures|Virus protease 3D structures]] | ||
| + | == References == | ||
| + | <references/> | ||
| + | __TOC__ | ||
| + | </StructureSection> | ||
| + | [[Category: Large Structures]] | ||
| + | [[Category: Middle East respiratory syndrome-related coronavirus]] | ||
| + | [[Category: Mesecar AD]] | ||
| + | [[Category: Tomar S]] | ||
Current revision
X-ray structure of MERS-CoV nsp5 protease bound with a designed inhibitor
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