View source for 9inl


==Crystal structure of SARS-Cov-2 main protease E166R mutant in complex with Bofutrelvir==
<StructureSection load='9inl' size='340' side='right'caption='[[9inl]], [[Resolution|resolution]] 2.04&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[9inl]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Severe_acute_respiratory_syndrome_coronavirus_2 Severe acute respiratory syndrome coronavirus 2]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=9INL OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=9INL 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]] 2.04&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=FHR:~{N}-[(2~{S})-3-cyclohexyl-1-oxidanylidene-1-[[(2~{S})-1-oxidanylidene-3-[(3~{S})-2-oxidanylidenepyrrolidin-3-yl]propan-2-yl]amino]propan-2-yl]-1~{H}-indole-2-carboxamide'>FHR</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=9inl FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=9inl OCA], [https://pdbe.org/9inl PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=9inl RCSB], [https://www.ebi.ac.uk/pdbsum/9inl PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=9inl ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/A0A8B1JNT2_SARS2 A0A8B1JNT2_SARS2] 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The COVID-19 pandemic has caused significant global health and economic disruption. Mutations E166N, E166R, E166N, S144A and His163A in the SARS-CoV-2 main protease (M(pro)) have been implicated in reducing the efficacy of certain antiviral treatments. Bofutrelvir, a promising inhibitor, has shown effectiveness against SARS-CoV-2 M(pro). This study aims to evaluate the inhibitory effects of Bofutrelvir on the E166N, E166R, His163A, E166V and S144A mutants of SARS-CoV-2 M(pro), as well as on MERS-CoV M(pro). Our findings indicate a substantial reduction in the inhibitory potency of Bofutrelvir against these mutants and MERS-CoV, with IC(50) values significantly higher than those for the wild-type SARS-CoV-2 M(pro). Specifically, the E166N, E166R, E166V, S144A, and H163A mutations significantly reduce the binding affinity and inhibitory effectiveness of Bofutrelvir due to disrupted hydrogen bonds, altered binding site stability, and reduced enzyme activity. Structural analysis of the crystal complexes showed that changes in interactions at the S1 subsite in the mutants and the loss of hydrogen bonds at the S4 subsite in MERS-CoV M(pro) are critical factors contributing to the diminished inhibitory activity. These insights reveal the necessity of ongoing structural analysis to adapt therapeutic strategies.

Inhibitory efficacy and structural insights of Bofutrelvir against SARS-CoV-2 M(pro) mutants and MERS-CoV M(pro).,Wang W, Zhou X, Li W, Zeng P, Guo L, Wang Q, Li J Commun Biol. 2025 Mar 25;8(1):493. doi: 10.1038/s42003-025-07929-9. PMID:40133408<ref>PMID:40133408</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 9inl" style="background-color:#fffaf0;"></div>
== References ==
<references/>
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</StructureSection>
[[Category: Large Structures]]
[[Category: Severe acute respiratory syndrome coronavirus 2]]
[[Category: Li J]]
[[Category: Zhou XL]]