View source for 2x3h


==COLIPHAGE K5A LYASE==
<StructureSection load='2x3h' size='340' side='right'caption='[[2x3h]], [[Resolution|resolution]] 1.60&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[2x3h]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/Bacteriophage_k1-5 Bacteriophage k1-5]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2X3H OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2X3H FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=BR:BROMIDE+ION'>BR</scene></td></tr>
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Heparin_lyase Heparin lyase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=4.2.2.7 4.2.2.7] </span></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=2x3h FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2x3h OCA], [http://pdbe.org/2x3h PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2x3h RCSB], [http://www.ebi.ac.uk/pdbsum/2x3h PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=2x3h ProSAT]</span></td></tr>
</table>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
K5 lyase A (KflA) is a tail spike protein (TSP) encoded by a K5A coliphage, which cleaves K5 capsular polysaccharide, a glycosaminoglycan with the repeat unit [-4)-betaGlcA-(1,4)- alphaGlcNAc(1-], displayed on the surface of Escherichia coli K5 strains. The crystal structure of KflA reveals a trimeric arrangement, with each monomer containing a right-handed, single-stranded parallel beta-helix domain. Stable trimer formation by the intertwining of strands in the C-terminal domain, followed by proteolytic maturation, is likely to be catalyzed by an autochaperone as described for K1F endosialidase. The structure of KflA represents the first bacteriophage tail spike protein combining polysaccharide lyase activity with a single-stranded parallel beta-helix fold. We propose a catalytic site and mechanism representing convergence with the syn-beta-elimination site of heparinase II from Pedobacter heparinus.

The K5 lyase KflA combines a viral tail spike structure with a bacterial polysaccharide lyase mechanism.,Thompson JE, Pourhossein M, Waterhouse A, Hudson T, Goldrick M, Derrick JP, Roberts IS J Biol Chem. 2010 Jul 30;285(31):23963-9. Epub 2010 Jun 2. PMID:20519506<ref>PMID:20519506</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 2x3h" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Bacteriophage k1-5]]
[[Category: Heparin lyase]]
[[Category: Large Structures]]
[[Category: Derrick, J P]]
[[Category: Goldrick, M]]
[[Category: Hudson, T]]
[[Category: Pourhossein, M]]
[[Category: Roberts, I S]]
[[Category: Thompson, J E]]
[[Category: Bacteriophage]]
[[Category: Glycosaminoglycan]]
[[Category: Lyase]]