==Crystal structure of Pseudomonas Aeruginosa Lectin 1 complexed with galactose at 1.6 A resolution==

<StructureSection load='1oko' size='340' side='right'caption='[[1oko]], [[Resolution|resolution]] 1.60&Aring;' scene=''>

<table><tr><td colspan='2'>[[1oko]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Pseudomonas_aeruginosa Pseudomonas aeruginosa]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1OKO OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1OKO FirstGlance]. <br>

</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=GAL:BETA-D-GALACTOSE'>GAL</scene>, <scene name='pdbligand=GLA:ALPHA+D-GALACTOSE'>GLA</scene>, <scene name='pdbligand=MPD:(4S)-2-METHYL-2,4-PENTANEDIOL'>MPD</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'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1oko FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1oko OCA], [http://pdbe.org/1oko PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1oko RCSB], [http://www.ebi.ac.uk/pdbsum/1oko PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1oko ProSAT]</span></td></tr>

== Function ==

[[http://www.uniprot.org/uniprot/PA1L_PSEAE PA1L_PSEAE]] D-galactose specific lectin. Binds in decreasing order of affinity: melibiose, methyl-alpha-D-galactoside, D-galactose, methyl-beta-D-galactoside, N-acetyl-D-galactosamine. Similar to plant lectins in its selective (carbohydrate-specific) hemagglutinating activity.

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== Publication Abstract from PubMed ==

The structure of the tetrameric Pseudomonas aeruginosa lectin I (PA-IL) in complex with galactose and calcium was determined at 1.6 A resolution, and the native protein was solved at 2.4 A resolution. Each monomer adopts a beta-sandwich fold with ligand binding site at the apex. All galactose hydroxyl groups, except O1, are involved in a hydrogen bond network with the protein and O3 and O4 also participate in the co-ordination of the calcium ion. The stereochemistry of calcium galactose binding is reminiscent of that observed in some animal C-type lectins. The structure of the complex provides a framework for future design of anti-bacterial compounds.

Structural basis of calcium and galactose recognition by the lectin PA-IL of Pseudomonas aeruginosa.,Cioci G, Mitchell EP, Gautier C, Wimmerova M, Sudakevitz D, Perez S, Gilboa-Garber N, Imberty A FEBS Lett. 2003 Dec 4;555(2):297-301. PMID:14644431<ref>PMID:14644431</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>

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<div class="pdbe-citations 1oko" style="background-color:#fffaf0;"></div>

==See Also==

*[[Galactose-binding lectin|Galactose-binding lectin]]

== References ==

<references/>

[[Category: Pseudomonas aeruginosa]]

[[Category: Gilboa-Garber, N]]

[[Category: Sugar binding protein]]