View source for 9hbo


==Highly optimized CNS penetrant inhibitors of EGFR Exon20 Insertion Mutations. Compound 51 bound to EGFRinsNPG [V948R]==
<StructureSection load='9hbo' size='340' side='right'caption='[[9hbo]], [[Resolution|resolution]] 2.45&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[9hbo]] is a 2 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=9HBO OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=9HBO 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]] 2.45&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=A1IUK:1-[2-[5-[1-[bis(fluoranyl)methyl]-5-methyl-pyrazol-4-yl]-2,4-bis(fluoranyl)phenyl]-3-pyrimidin-4-yl-4,6-dihydropyrrolo[3,4-d]imidazol-5-yl]propan-1-one'>A1IUK</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=9hbo FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=9hbo OCA], [https://pdbe.org/9hbo PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=9hbo RCSB], [https://www.ebi.ac.uk/pdbsum/9hbo PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=9hbo ProSAT]</span></td></tr>
</table>
== Disease ==
[https://www.uniprot.org/uniprot/EGFR_HUMAN EGFR_HUMAN] Defects in EGFR are associated with lung cancer (LNCR) [MIM:[https://omim.org/entry/211980 211980]. LNCR is a common malignancy affecting tissues of the lung. The most common form of lung cancer is non-small cell lung cancer (NSCLC) that can be divided into 3 major histologic subtypes: squamous cell carcinoma, adenocarcinoma, and large cell lung cancer. NSCLC is often diagnosed at an advanced stage and has a poor prognosis.
== Function ==
[https://www.uniprot.org/uniprot/EGFR_HUMAN EGFR_HUMAN] Receptor tyrosine kinase binding ligands of the EGF family and activating several signaling cascades to convert extracellular cues into appropriate cellular responses. Known ligands include EGF, TGFA/TGF-alpha, amphiregulin, epigen/EPGN, BTC/betacellulin, epiregulin/EREG and HBEGF/heparin-binding EGF. Ligand binding triggers receptor homo- and/or heterodimerization and autophosphorylation on key cytoplasmic residues. The phosphorylated receptor recruits adapter proteins like GRB2 which in turn activates complex downstream signaling cascades. Activates at least 4 major downstream signaling cascades including the RAS-RAF-MEK-ERK, PI3 kinase-AKT, PLCgamma-PKC and STATs modules. May also activate the NF-kappa-B signaling cascade. Also directly phosphorylates other proteins like RGS16, activating its GTPase activity and probably coupling the EGF receptor signaling to the G protein-coupled receptor signaling. Also phosphorylates MUC1 and increases its interaction with SRC and CTNNB1/beta-catenin.<ref>PMID:7657591</ref> <ref>PMID:11602604</ref> <ref>PMID:12873986</ref> <ref>PMID:10805725</ref> <ref>PMID:11116146</ref> <ref>PMID:11483589</ref> <ref>PMID:17115032</ref> <ref>PMID:21258366</ref> <ref>PMID:12297050</ref> <ref>PMID:12620237</ref> <ref>PMID:15374980</ref> <ref>PMID:19560417</ref> <ref>PMID:20837704</ref>   Isoform 2 may act as an antagonist of EGF action.<ref>PMID:7657591</ref> <ref>PMID:11602604</ref> <ref>PMID:12873986</ref> <ref>PMID:10805725</ref> <ref>PMID:11116146</ref> <ref>PMID:11483589</ref> <ref>PMID:17115032</ref> <ref>PMID:21258366</ref> <ref>PMID:12297050</ref> <ref>PMID:12620237</ref> <ref>PMID:15374980</ref> <ref>PMID:19560417</ref> <ref>PMID:20837704</ref> 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Despite recent advances in the inhibition of EGFR (epidermal growth factor receptor), there remains a clinical need for new EGFR Exon20 insertion (Ex20Ins) inhibitors that spare EGFR WT. Herein, we report the discovery and optimization of two chemical series leading to ether 23 and biaryl 36 as potent, selective, and brain-penetrant inhibitors of Ex20Ins mutants. Building on our earlier discovery of alkyne 5 which allowed access to CNS property space for an Ex20Ins inhibitor, we utilized structure-based design to move to lower lipophilicity and lower CL(int) compounds while maintaining a WT selectivity margin. During optimization, aldehyde oxidase (AO) metabolism was identified as a human clearance risk, and through SAR exploration, lower AO metabolism was achieved. Potency and WT margin were optimized across a range of Ex20Ins mutants including the potential acquired resistance T790M mutant and efficacy demonstrated in an LXF2478 Ex20Ins ASV model with margin to EGFR WT in vivo.

Highly Optimized CNS Penetrant Inhibitors of EGFR Exon20 Insertion Mutations.,McCoull W, Thomson C, Braybrooke E, Chan C, Colclough N, Cortes Gonzalez MA, Cosulich S, Davies NL, Floc'h N, Greenwood R, Hargreaves D, Huang P, Hunt TA, Johnson T, Johnstrom P, Kettle JG, Kondrashov M, Kostomiris DH, Li S, Lister A, Martin S, McKerrecher D, McLean N, Nissink JWM, Orme JP, Orwig P, Packer MJ, Pearson S, Qin L, Felisberto-Rodrigues C, Savoca A, Schou M, Stokes S, Swaih AM, Talbot S, Tucker MJ, Ward RA, Wadforth E, Wang C, Wilson J, Yang Y J Med Chem. 2025 Jan 27. doi: 10.1021/acs.jmedchem.4c02811. PMID:39869768<ref>PMID:39869768</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 9hbo" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Felisberto-Rodrigues C]]
[[Category: Hargreaves D]]