View source for 9lim


==Crystal structure of the monkeypox virus N-tagged I7L protease in the P212121 space group==
<StructureSection load='9lim' size='340' side='right'caption='[[9lim]], [[Resolution|resolution]] 2.32&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[9lim]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Monkeypox_virus_Zaire-96-I-16 Monkeypox virus Zaire-96-I-16]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=9LIM OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=9LIM 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]] 2.32&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=SO4:SULFATE+ION'>SO4</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=9lim FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=9lim OCA], [https://pdbe.org/9lim PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=9lim RCSB], [https://www.ebi.ac.uk/pdbsum/9lim PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=9lim ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/Q8V512_MONPZ Q8V512_MONPZ] 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Monkeypox virus (MPXV), an orthopoxvirus that has long been endemic in Africa, has posed a significant global health threat since 2022. The I7L protease, a highly conserved cysteine proteinase essential for orthopoxvirus replication, represents a promising target for broad-spectrum antiviral drug development. Here, the first crystal structure of MPXV I7L protease is reported, revealing its unique dimeric form and different conformations of a cap region nearby the active site. Molecular dynamics simulations and AlphaFold3 prediction of protease-substrate structures both suggest that this highly flexible cap acts as a conformational switch, regulating the substrate access to the active site. Additionally, the structural basis of substrate recognition and the catalytic mechanism of the protease are elucidated, mapping determinants of substrate specificity. These insights enable us to design covalent inhibitors to mimic the natural substrates and develop a fluorescence resonance energy transfer (FRET)-based protease assay to effectively assess the inhibitory activity, leading to the discovery of first-in-class inhibitors of MPXV I7L protease with nanomolar potency. Therefore, this work provides a comprehensive understanding of the MPXV I7L protease's structure, dynamics, and function, and presents an example of successful rational design of covalent peptidomimetic inhibitors, serving as a good starting point for drug development against MPXV.

Dynamic Cap-Mediated Substrate Access and Potent Inhibitor Design of Monkeypox Virus I7L Protease.,Su H, Wu G, Xiong M, Wang Y, Cao J, You M, Xiang Y, Nie T, Li M, Xiao G, Zhang L, Shao Q, Xu Y Adv Sci (Weinh). 2025 Apr 7:e2501625. doi: 10.1002/advs.202501625. PMID:40193298<ref>PMID:40193298</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 9lim" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Monkeypox virus Zaire-96-I-16]]
[[Category: Li MJ]]
[[Category: Su HX]]
[[Category: Wang YH]]
[[Category: Xu YC]]