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{{STRUCTURE_3m3e|  PDB=3m3e  |  SCENE=  }}
==Crystal Structure of Agrocybe aegerita lectin AAL mutant E66A complexed with p-Nitrophenyl Thomsen-Friedenreich disaccharide==
===Crystal Structure of Agrocybe aegerita lectin AAL mutant E66A complexed with p-Nitrophenyl Thomsen-Friedenreich disaccharide===
<StructureSection load='3m3e' size='340' side='right' caption='[[3m3e]], [[Resolution|resolution]] 2.10&Aring;' scene=''>
{{ABSTRACT_PUBMED_20530247}}
== Structural highlights ==
<table><tr><td colspan='2'>[[3m3e]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Agrocybe_aegerita Agrocybe aegerita]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3M3E OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3M3E FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=NPO:P-NITROPHENOL'>NPO</scene>, <scene name='pdbligand=A2G:N-ACETYL-2-DEOXY-2-AMINO-GALACTOSE'>A2G</scene>, <scene name='pdbligand=GAL:BETA-D-GALACTOSE'>GAL</scene></td></tr>
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3afk|3afk]], [[3m3c|3m3c]], [[3m3o|3m3o]], [[3m3q|3m3q]]</td></tr>
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">AAL ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=5400 Agrocybe aegerita])</td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3m3e FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3m3e OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3m3e RCSB], [http://www.ebi.ac.uk/pdbsum/3m3e PDBsum]</span></td></tr>
</table>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Thomsen-Friedenreich (TF) antigen, which plays an important role in the regulation of cancer cell proliferation, occurs in approximately 90% of all human cancers and precancerous conditions. Although TF antigen has been known for almost 80 yr as a pancarcinoma antigen, the recognition mechanism between TF antigen and target protein has not been structurally characterized. A number of studies indicated that TF disaccharide is a potential ligand of the galactoside-binding galectins. In this work, we identified the TF antigen as a potential ligand of the antitumor galectin AAL (Agrocybe aegerita lectin) through glycan array analysis and reported the crystal structure of AAL complexed with the TF antigen. The structure provides a first look at the recognition mode between AAL and TF antigen, which is unique in a conservative (Glu-water-Arg-water) structural motif-based hydrogen bond network. Structure-based mutagenesis analysis further revealed the residues responsible for recognition specificity and binding affinity. Crystal structures of AAL complexed with two other TF-containing glycans showed that the unique TF recognition mode is kept intact, which may be commonly adopted in some cancer-related galectins. The finding provided the new target and approach for the antitumor drug design and relative strategy based on the AAL-TF recognition mode as a prototype model.


==Function==
Structural insights into the recognition mechanism between an antitumor galectin AAL and the Thomsen-Friedenreich antigen.,Feng L, Sun H, Zhang Y, Li DF, Wang DC FASEB J. 2010 Oct;24(10):3861-8. Epub 2010 Jun 7. PMID:20530247<ref>PMID:20530247</ref>
[[http://www.uniprot.org/uniprot/ATLE_AGRAE ATLE_AGRAE]] Anti-tumor lectin with DNase activity. Inhibits the growth of several tumor cell lines in vitro. Induces lymphocyte infiltration and necrosis of tumor cells in a mouse tumor model. Induces apoptosis in HeLa cells.<ref>PMID:12757412</ref>


==About this Structure==
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
[[3m3e]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Agrocybe_aegerita Agrocybe aegerita]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3M3E OCA].
</div>
 
== References ==
==Reference==
<references/>
<ref group="xtra">PMID:020530247</ref><references group="xtra"/><references/>
__TOC__
</StructureSection>
[[Category: Agrocybe aegerita]]
[[Category: Agrocybe aegerita]]
[[Category: Feng, L.]]
[[Category: Feng, L]]
[[Category: Li, D.]]
[[Category: Li, D]]
[[Category: Wang, D.]]
[[Category: Wang, D]]
[[Category: 3-galnac-alpha-o-p-nitrophenyl]]
[[Category: 3-galnac-alpha-o-p-nitrophenyl]]
[[Category: Aal]]
[[Category: Aal]]
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