View source for 5wiy


==Kelch domain of human Keap1 bound to small molecule inhibitor fragment: 4-amino-1,7-dihydro-6H-pyrazolo[3,4-d]pyrimidine-6-thione==
<StructureSection load='5wiy' size='340' side='right'caption='[[5wiy]], [[Resolution|resolution]] 2.23&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[5wiy]] 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=5WIY OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5WIY 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]] 2.23&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=1XM:4-AMINO-1,7-DIHYDRO-6H-PYRAZOLO[3,4-D]PYRIMIDINE-6-THIONE'>1XM</scene>, <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=5wiy FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5wiy OCA], [https://pdbe.org/5wiy PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5wiy RCSB], [https://www.ebi.ac.uk/pdbsum/5wiy PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5wiy ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/KEAP1_HUMAN KEAP1_HUMAN] 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Development of small molecule inhibitors of protein-protein interactions (PPIs) is hampered by our poor understanding of the druggability of PPI target sites. Here, we describe the combined application of alanine-scanning mutagenesis, fragment screening, and FTMap computational hot spot mapping to evaluate the energetics and druggability of the highly charged PPI interface between Kelch-like ECH-associated protein 1 (KEAP1) and nuclear factor erythroid 2 like 2 (Nrf2), an important drug target. FTMap identifies four binding energy hot spots at the active site. Only two of these are exploited by Nrf2, which alanine scanning of both proteins shows to bind primarily through E79 and E82 interacting with KEAP1 residues S363, R380, R415, R483, and S508. We identify fragment hits and obtain X-ray complex structures for three fragments via crystal soaking using a new crystal form of KEAP1. Combining these results provides a comprehensive and quantitative picture of the origins of binding energy at the interface. Our findings additionally reveal non-native interactions that might be exploited in the design of uncharged synthetic ligands to occupy the same site on KEAP1 that has evolved to bind the highly charged DEETGE binding loop of Nrf2. These include pi-stacking with KEAP1 Y525 and interactions at an FTMap-identified hot spot deep in the binding site. Finally, we discuss how the complementary information provided by alanine-scanning mutagenesis, fragment screening, and computational hot spot mapping can be integrated to more comprehensively evaluate PPI druggability.

Interaction Energetics and Druggability of the Protein-Protein Interaction between Kelch-like ECH-Associated Protein 1 (KEAP1) and Nuclear Factor Erythroid 2 Like 2 (Nrf2).,Zhong M, Lynch A, Muellers SN, Jehle S, Luo L, Hall DR, Iwase R, Carolan JP, Egbert M, Wakefield A, Streu K, Harvey CM, Ortet PC, Kozakov D, Vajda S, Allen KN, Whitty A Biochemistry. 2020 Feb 4;59(4):563-581. doi: 10.1021/acs.biochem.9b00943. Epub, 2020 Jan 2. PMID:31851823<ref>PMID:31851823</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 5wiy" style="background-color:#fffaf0;"></div>

==See Also==
*[[Kelch-like protein 3D structures|Kelch-like protein 3D structures]]
== References ==
<references/>
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</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Allen KN]]
[[Category: Carolan JP]]
[[Category: Lynch AJ]]