View source for 3rm4


==AMCase in complex with Compound 1==
<StructureSection load='3rm4' size='340' side='right'caption='[[3rm4]], [[Resolution|resolution]] 1.90&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[3rm4]] 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=3RM4 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3RM4 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]] 1.9&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=3RM:5-{4-[2-(4-BROMOPHENOXY)ETHYL]PIPERAZIN-1-YL}-4H-1,2,4-TRIAZOL-3-AMINE'>3RM</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=3rm4 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3rm4 OCA], [https://pdbe.org/3rm4 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3rm4 RCSB], [https://www.ebi.ac.uk/pdbsum/3rm4 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3rm4 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/CHIA_HUMAN CHIA_HUMAN] Degrades chitin and chitotriose. May participate in the defense against nematodes, fungi and other pathogens. Plays a role in T-helper cell type 2 (Th2) immune response. Contributes to the response to IL-13 and inflammation in response to IL-13. Stimulates chemokine production by pulmonary epithelial cells. Protects lung epithelial cells against apoptosis and promotes phosphorylation of AKT1. Its function in the inflammatory response and in protecting cells against apoptosis is inhibited by allosamidin, suggesting that the function of this protein depends on carbohydrate binding.<ref>PMID:11085997</ref> <ref>PMID:18824549</ref> <ref>PMID:19342690</ref> <ref>PMID:19435888</ref> 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Acidic mammalian chitinase (AMCase) is a member of the glycosyl hydrolase 18 family (EC 3.2.1.14) that has been implicated in the pathophysiology of allergic airway disease such as asthma. Small molecule inhibitors of AMCase were identified using a combination of high-throughput screening, fragment screening, and virtual screening techniques and characterized by enzyme inhibition and NMR and Biacore binding experiments. X-ray structures of the inhibitors in complex with AMCase revealed that the larger more potent HTS hits, e.g. 5-(4-(2-(4-bromophenoxy)ethyl)piperazine-1-yl)-1H-1,2,4-triazol-3-amine 1, spanned from the active site pocket to a hydrophobic pocket. Smaller fragments identified by FBS occupy both these pockets independently and suggest potential strategies for linking fragments. Compound 1 is a 200 nM AMCase inhibitor which reduced AMCase enzymatic activity in the bronchoalveolar lavage fluid in allergen-challenged mice after oral dosing.

Identification and characterization of acidic mammalian chitinase inhibitors.,Cole DC, Olland AM, Jacob J, Brooks J, Bursavich MG, Czerwinski R, DeClercq C, Johnson M, Joseph-McCarthy D, Ellingboe JW, Lin L, Nowak P, Presman E, Strand J, Tam A, Williams CM, Yao S, Tsao DH, Fitz LJ J Med Chem. 2010 Aug 26;53(16):6122-8. PMID:20666458<ref>PMID:20666458</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 3rm4" style="background-color:#fffaf0;"></div>

==See Also==
*[[Chitinase 3D structures|Chitinase 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Olland A]]