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1e9l

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[[Image:1e9l.jpg|left|200px]]<br /><applet load="1e9l" size="350" color="white" frame="true" align="right" spinBox="true"
 
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caption="1e9l, resolution 2.5&Aring;" />
 
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'''THE CRYSTAL STRUCTURE OF NOVEL MAMMALIAN LECTIN YM1 SUGGESTS A SACCHARIDE BINDING SITE'''<br />
 
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==Overview==
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==The crystal structure of novel mammalian lectin Ym1 suggests a saccharide binding site==
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Ym1, a secretory protein synthesized by activated murine peritoneal macrophages, is a novel mammalian lectin with a binding specificity to GlcN. Lectins are responsible for carbohydrate recognition and for mediating cell-cell and cell-extracellular matrix interactions in microbes, plants, and animals. Glycosaminoglycan heparin/heparan sulfate binding ability was also detected in Ym1. We report here the three-dimensional structure of Ym1 at 2.5-A resolution by x-ray crystallography. The crystal structure of Ym1 consists of two globular domains, a beta/alpha triose-phosphate isomerase barrel domain and a small alpha + beta folding domain. A notable electron density of sugar is detected in the Ym1 crystal structure. The saccharide is located inside the triose-phosphate isomerase domain at the COOH terminal end of the beta-strands. Both hydrophilic and hydrophobic interactions are noted in the sugar-binding site in Ym1. Despite the fact that Ym1 is not a chitinase, structurally, Ym1 shares significant homology with chitinase A of Serratia marcescens. Ym1 and chitinase A have a similar carbohydrate binding cleft. This study provides new structure information, which will lead to better understanding of the biological significance of Ym1 and its putative gene members.
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<StructureSection load='1e9l' size='340' side='right'caption='[[1e9l]], [[Resolution|resolution]] 2.50&Aring;' scene=''>
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== Structural highlights ==
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==About this Structure==
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<table><tr><td colspan='2'>[[1e9l]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Mus_musculus Mus musculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1E9L OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1E9L FirstGlance]. <br>
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1E9L is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Mus_musculus Mus musculus] with <scene name='pdbligand=GCS:'>GCS</scene> as [http://en.wikipedia.org/wiki/ligand ligand]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1E9L OCA].
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.5&#8491;</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GCS:D-GLUCOSAMINE'>GCS</scene></td></tr>
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==Reference==
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1e9l FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1e9l OCA], [https://pdbe.org/1e9l PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1e9l RCSB], [https://www.ebi.ac.uk/pdbsum/1e9l PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1e9l ProSAT]</span></td></tr>
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The crystal structure of a novel mammalian lectin, Ym1, suggests a saccharide binding site., Sun YJ, Chang NC, Hung SI, Chang AC, Chou CC, Hsiao CD, J Biol Chem. 2001 May 18;276(20):17507-14. Epub 2001 Feb 15. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=11278670 11278670]
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/CHIL3_MOUSE CHIL3_MOUSE] Lectin that binds saccharides with a free amino group, such as glucosamine or galactosamine. Binding to oligomeric saccharides is much stronger than binding to mono- or disaccharides. Also binds chitin and heparin. Has weak hexosaminidase activity but no chitinase activity. Has chemotactic activity for T-lymphocytes, bone marrow cells and eosinophils. May play a role in inflammation and allergy.<ref>PMID:10625674</ref> <ref>PMID:11297523</ref> <ref>PMID:11733538</ref>
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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Check<jmol>
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<jmolCheckbox>
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/e9/1e9l_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=1e9l ConSurf].
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<div style="clear:both"></div>
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== References ==
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<references/>
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__TOC__
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</StructureSection>
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[[Category: Large Structures]]
[[Category: Mus musculus]]
[[Category: Mus musculus]]
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[[Category: Single protein]]
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[[Category: Hsiao CD]]
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[[Category: Hsiao, C D.]]
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[[Category: Sun YJ]]
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[[Category: Sun, Y J.]]
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[[Category: GCS]]
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[[Category: inducible]]
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[[Category: inflammation]]
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[[Category: lectin]]
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[[Category: secretory]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 12:25:26 2008''
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Current revision

The crystal structure of novel mammalian lectin Ym1 suggests a saccharide binding site

PDB ID 1e9l

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