1lkb

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(New page: 200px<br /><applet load="1lkb" size="450" color="white" frame="true" align="right" spinBox="true" caption="1lkb, resolution 1.70&Aring;" /> '''Porcine Pancreatic E...)
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[[Image:1lkb.jpg|left|200px]]<br /><applet load="1lkb" size="450" color="white" frame="true" align="right" spinBox="true"
 
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caption="1lkb, resolution 1.70&Aring;" />
 
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'''Porcine Pancreatic Elastase/Na-Complex'''<br />
 
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==Overview==
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==Porcine Pancreatic Elastase/Na-Complex==
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Porcine pancreatic elastase has been crystallized at slightly acidic pH, under two similar but slightly different conditions. Diffraction data were, collected at a wavelength of 1.5 A to a maximum resolution of 1.7 A. Both, difference electron-density maps and anomalous difference electron-density, maps suggest that in crystals grown from a sodium sulfate solution PPE, binds Na(+) in its metal-binding site. In contrast, PPE binds Ca(2+) in, crystals grown from a solution containing sodium citrate and calcium, chloride. This observation is in contradiction to most PPE structures, reported in the PDB. In addition to the metal-binding site, up to three, other binding sites, which appear to be anion-binding sites, could be, identified based on the observed anomalous intensity differences.
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<StructureSection load='1lkb' size='340' side='right'caption='[[1lkb]], [[Resolution|resolution]] 1.70&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[1lkb]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Sus_scrofa Sus scrofa]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1LKB OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1LKB FirstGlance]. <br>
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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]] 1.7&#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=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr>
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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=1lkb FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1lkb OCA], [https://pdbe.org/1lkb PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1lkb RCSB], [https://www.ebi.ac.uk/pdbsum/1lkb PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1lkb ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/CELA1_PIG CELA1_PIG] Acts upon elastin.
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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/lk/1lkb_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.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=1lkb ConSurf].
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<div style="clear:both"></div>
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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Porcine pancreatic elastase has been crystallized at slightly acidic pH under two similar but slightly different conditions. Diffraction data were collected at a wavelength of 1.5 A to a maximum resolution of 1.7 A. Both difference electron-density maps and anomalous difference electron-density maps suggest that in crystals grown from a sodium sulfate solution PPE binds Na(+) in its metal-binding site. In contrast, PPE binds Ca(2+) in crystals grown from a solution containing sodium citrate and calcium chloride. This observation is in contradiction to most PPE structures reported in the PDB. In addition to the metal-binding site, up to three other binding sites, which appear to be anion-binding sites, could be identified based on the observed anomalous intensity differences.
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==About this Structure==
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Metal binding to porcine pancreatic elastase: calcium or not calcium.,Weiss MS, Panjikar S, Nowak E, Tucker PA Acta Crystallogr D Biol Crystallogr. 2002 Sep;58(Pt 9):1407-12. Epub 2002, Aug 23. PMID:12198296<ref>PMID:12198296</ref>
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1LKB is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Sus_scrofa Sus scrofa] with SO4, CL and NA as [http://en.wikipedia.org/wiki/ligands ligands]. Active as [http://en.wikipedia.org/wiki/Pancreatic_elastase Pancreatic elastase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.4.21.36 3.4.21.36] Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=1LKB OCA].
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==Reference==
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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Metal binding to porcine pancreatic elastase: calcium or not calcium., Weiss MS, Panjikar S, Nowak E, Tucker PA, Acta Crystallogr D Biol Crystallogr. 2002 Sep;58(Pt 9):1407-12. Epub 2002, Aug 23. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=12198296 12198296]
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</div>
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[[Category: Pancreatic elastase]]
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<div class="pdbe-citations 1lkb" style="background-color:#fffaf0;"></div>
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[[Category: Single protein]]
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[[Category: Sus scrofa]]
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[[Category: Nowak, E.]]
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[[Category: Panjikar, S.]]
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[[Category: Tucker, P.A.]]
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[[Category: Weiss, M.S.]]
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[[Category: CL]]
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[[Category: NA]]
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[[Category: SO4]]
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[[Category: beta-barrel]]
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[[Category: chloride binding]]
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[[Category: chymotrypsin-fold]]
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[[Category: sodium binding]]
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[[Category: sulfate binding]]
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''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Tue Nov 20 20:37:24 2007''
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==See Also==
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*[[Elastase 3D structures|Elastase 3D structures]]
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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]]
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[[Category: Sus scrofa]]
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[[Category: Nowak E]]
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[[Category: Panjikar S]]
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[[Category: Tucker PA]]
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[[Category: Weiss MS]]

Current revision

Porcine Pancreatic Elastase/Na-Complex

PDB ID 1lkb

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