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==Biochemical, Cellular and Structural Characterization of Novel ERK3 Inhibitors==
<StructureSection load='6yky' size='340' side='right'caption='[[6yky]], [[Resolution|resolution]] 2.52&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[6yky]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6YKY OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6YKY 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]] 2.52&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=OWQ:3-(4-methoxyphenyl)-~{N}-[(3~{R})-1-pyridin-4-ylpyrrolidin-3-yl]-[1,2,3]triazolo[4,5-d]pyrimidin-5-amine'>OWQ</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=6yky FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6yky OCA], [https://pdbe.org/6yky PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6yky RCSB], [https://www.ebi.ac.uk/pdbsum/6yky PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6yky ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/MK06_HUMAN MK06_HUMAN] Atypical MAPK protein. Phosphorylates microtubule-associated protein 2 (MAP2) and MAPKAPK5. The precise role of the complex formed with MAPKAPK5 is still unclear, but the complex follows a complex set of phosphorylation events: upon interaction with atypical MAPKAPK5, ERK3/MAPK6 is phosphorylated at Ser-189 and then mediates phosphorylation and activation of MAPKAPK5, which in turn phosphorylates ERK3/MAPK6. May promote entry in the cell cycle (By similarity).
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Triazolo[4,5-d]pyrimidin-5-amines were identified from kinase selectivity screening as novel ERK3 inhibitors with sub-100 nanomolar potencies in a biochemical assay using MK5 as substrate and with an attractive kinase selectivity profile. ERK3 crystal structures clarified the inhibitor binding mode in the ATP pocket with impact on A-loop, GC-loop and alphaC-helix conformations suggesting a potential structural link towards MK5 interaction via the FHIEDE motif. The inhibitors also showed sub-100 nM potencies in a cellular ERK3 NanoBRET assay and with excellent correlation to the biochemical IC50s. This novel series provides valuable tool compounds to further investigate the biological function and activation mechanism of ERK3.

Biochemical, cellular and structural characterization of novel and selective ERK3 inhibitors.,Gradler U, Busch M, Leuthner B, Raba M, Burgdorf L, Lehmann M, Linde N, Esdar C Bioorg Med Chem Lett. 2020 Sep 11;30(22):127551. doi: 10.1016/j.bmcl.2020.127551. PMID:32927028<ref>PMID:32927028</ref>

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

==See Also==
*[[Mitogen-activated protein kinase 3D structures|Mitogen-activated protein kinase 3D structures]]
== References ==
<references/>
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</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Graedler U]]