View source for 2plk

==Crystal structure of lysine/ornithine decarboxylase complexed with cadaverine from Vibrio vulnificus==
<StructureSection load='2plk' size='340' side='right' caption='[[2plk]], [[Resolution|resolution]] 2.14&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[2plk]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Vibvu Vibvu]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2PLK OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2PLK FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=P3D:(4-{(E)-[(5-AMINOPENTYL)IMINO]METHYL}-5-HYDROXY-6-METHYLPYRIDIN-3-YL)METHYL+DIHYDROGEN+PHOSPHATE'>P3D</scene></td></tr>
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2plj|2plj]]</td></tr>
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">LysA ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=216895 VIBVU])</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=2plk FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2plk OCA], [http://pdbe.org/2plk PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2plk RCSB], [http://www.ebi.ac.uk/pdbsum/2plk PDBsum]</span></td></tr>
</table>
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
  <jmolCheckbox>
    <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/pl/2plk_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
    <text>to colour the structure by Evolutionary Conservation</text>
  </jmolCheckbox>
</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=2plk ConSurf].
<div style="clear:both"></div>
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== Publication Abstract from PubMed ==
The beta/alpha-barrel fold type basic amino acid decarboxylases include eukaryotic ornithine decarboxylases (ODC) and bacterial and plant enzymes with activity on L-arginine and meso-diaminopimelate. These enzymes catalyze essential steps in polyamine and lysine biosynthesis. Phylogenetic analysis suggests that diverse bacterial species also contain ODC-like enzymes from this fold type. However, in comparison with the eukaryotic ODCs, amino acid differences were identified in the sequence of the 3(10)-helix that forms a key specificity element in the active site, suggesting they might function on novel substrates. Putative decarboxylases from a phylogenetically diverse range of bacteria were characterized to determine their substrate preference. Enzymes from species within Methanosarcina, Pseudomonas, Bartonella, Nitrosomonas, Thermotoga, and Aquifex showed a strong preference for L-ornithine, whereas the enzyme from Vibrio vulnificus (VvL/ODC) had dual specificity functioning well on both L-ornithine and L-lysine. The x-ray structure of VvL/ODC was solved in the presence of the reaction products putrescine and cadaverine to 1.7 and 2.15A, respectively. The overall structure is similar to eukaryotic ODC; however, reorientation of the 3(10)-helix enlarging the substrate binding pocket allows L-lysine to be accommodated. The structure of the putrescine-bound enzyme suggests that a bridging water molecule between the shorter L-ornithine and key active site residues provides the structural basis for VvL/ODC to also function on this substrate. Our data demonstrate that there is greater structural and functional diversity in bacterial polyamine biosynthetic decarboxylases than previously suspected.

Phylogenetic diversity and the structural basis of substrate specificity in the beta/alpha-barrel fold basic amino acid decarboxylases.,Lee J, Michael AJ, Martynowski D, Goldsmith EJ, Phillips MA J Biol Chem. 2007 Sep 14;282(37):27115-25. Epub 2007 Jul 11. PMID:17626020<ref>PMID:17626020</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 2plk" style="background-color:#fffaf0;"></div>

==See Also==
*[[Ornithine decarboxylase|Ornithine decarboxylase]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Vibvu]]
[[Category: Goldsmith, E J]]
[[Category: Lee, J]]
[[Category: Phillips, M A]]
[[Category: Beta barrel]]
[[Category: Beta/alpha barrel]]
[[Category: Lyase]]
[[Category: Type iv decarboxylase]]