View source for 4pk6


==Crystal structure of the indoleamine 2,3-dioxygenagse 1 (IDO1) complexed with imidazothiazole derivative==
<StructureSection load='4pk6' size='340' side='right'caption='[[4pk6]], [[Resolution|resolution]] 3.45&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[4pk6]] 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=4PK6 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4PK6 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]] 3.45&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene>, <scene name='pdbligand=PKL:N-[2-(3-CHLOROPHENYL)ETHYL]-3-(4-METHYLPHENYL)IMIDAZO[2,1-B][1,3]THIAZOLE-5-CARBOXAMIDE'>PKL</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=4pk6 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4pk6 OCA], [https://pdbe.org/4pk6 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4pk6 RCSB], [https://www.ebi.ac.uk/pdbsum/4pk6 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4pk6 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/I23O1_HUMAN I23O1_HUMAN] Catalyzes the cleavage of the pyrrol ring of tryptophan and incorporates both atoms of a molecule of oxygen.<ref>PMID:17671174</ref> 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Indoleamine 2,3-dioxygenase 1 (IDO1) is considered as a promising target for the treatment of several diseases, including neurological disorders and cancer. We report here the crystal structures of two IDO1/IDO1 inhibitor complexes, one of which shows that Amg-1 is directly bound to the heme iron of IDO1 with a clear induced fit. We also describe the identification and preliminary optimization of imidazothiazole derivatives as novel IDO1 inhibitors. Using our crystal structure information and structure-activity relationships (SAR) at the pocket-B of IDO1, we found a series of urea derivatives as potent IDO1 inhibitors and revealed that generation of an induced fit and the resulting interaction with Phe226 and Arg231 are essential for potent IDO1 inhibitory activity. The results of this study are very valuable for understanding the mechanism of IDO1 activation, which is very important for structure-based drug design (SBDD) to discover potent IDO1 inhibitors.

Crystal Structures and Structure-Activity Relationships of Imidazothiazole Derivatives as IDO1 Inhibitors.,Tojo S, Kohno T, Tanaka T, Kamioka S, Ota Y, Ishii T, Kamimoto K, Asano S, Isobe Y ACS Med Chem Lett. 2014 Aug 21;5(10):1119-23. doi: 10.1021/ml500247w. eCollection, 2014 Oct 9. PMID:25313323<ref>PMID:25313323</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 4pk6" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Ishii T]]
[[Category: Kamioka S]]
[[Category: Kohno T]]
[[Category: Tojo S]]