View source for 6m12


==Crystal Structure of Rnase L in complex with SU11652==
<StructureSection load='6m12' size='340' side='right'caption='[[6m12]], [[Resolution|resolution]] 2.40&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[6m12]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Sus_scrofa Sus scrofa]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6M12 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6M12 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]] 2.4&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=25L:[[(2R,3R,4R,5R)-5-(6-AMINOPURIN-9-YL)-4-[[(2R,3R,4R,5R)-5-(6-AMINOPURIN-9-YL)-4-[[(2R,3S,4R,5R)-5-(6-AMINOPURIN-9-YL)-3,4-DIHYDROXY-OXOLAN-2-YL]METHOXY-HYDROXY-PHOSPHORYL]OXY-3-HYDROXY-OXOLAN-2-YL]METHOXY-HYDROXY-PHOSPHORYL]OXY-3-HYDROXY-OXOLAN-2-YL]METHOXY-HYDROXY-PHOSPHORYL]+PHOSPHONO+HYDROGEN+PHOSPHATE'>25L</scene>, <scene name='pdbligand=J60:5-[(E)-(5-CHLORO-2-OXO-1,2-DIHYDRO-3H-INDOL-3-YLIDENE)METHYL]-N-[2-(DIETHYLAMINO)ETHYL]-2,4-DIMETHYL-1H-PYRROLE-3-CARBOXAMIDE'>J60</scene>, <scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</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=6m12 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6m12 OCA], [https://pdbe.org/6m12 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6m12 RCSB], [https://www.ebi.ac.uk/pdbsum/6m12 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6m12 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/A5H025_PIG A5H025_PIG] 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The pseudokinase (PK) RNase L is a functional ribonuclease and plays important roles in human innate immunity. The ribonuclease activity of RNase L can be regulated by the kinase inhibitor sunitinib. The combined use of oncolytic virus and sunitinib has been shown to exert synergistic effects in anticancer therapy. In this study, we aimed to uncover the mechanism of action through which sunitinib inhibits RNase L. We solved the crystal structures of RNase L in complex with sunitinib and its analogs toceranib and SU11652. Our results showed that sunitinib bound to the ATP-binding pocket of RNase L. Unexpectedly, the alphaA helix linking the ankyrin repeat-domain and the PK domain affected the binding mode of sunitinib and resulted in an unusual flipped orientation relative to other structures in PDB. Molecular dynamics simulations and dynamic light scattering results support that the binding of sunitinib in the PK domain destabilized the dimer conformation of RNase L and allosterically inhibited its ribonuclease activity. Our study suggested that dimer destabilization could be an effective strategy for the discovery of RNase L inhibitors and that targeting the ATP-binding pocket in the PK domain of RNase L was an efficient approach for modulating its ribonuclease activity.

Sunitinib inhibits RNase L by destabilizing its active dimer conformation.,Tang J, Wang Y, Zhou H, Ye Y, Talukdar M, Fu Z, Liu Z, Li J, Neculai D, Gao J, Huang H Biochem J. 2020 Sep 18;477(17):3387-3399. doi: 10.1042/BCJ20200260. PMID:32830849<ref>PMID:32830849</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 6m12" style="background-color:#fffaf0;"></div>

==See Also==
*[[Ribonuclease 3D structures|Ribonuclease 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Sus scrofa]]
[[Category: Huang H]]
[[Category: Tang J]]