View source for 6est


==INTERACTION OF THE PEPTIDE CF3-LEU-ALA-NH-C6H4-CF3(TFLA) WITH PORCINE PANCREATIC ELASTASE. X-RAY STUDIES AT 1.8 ANGSTROMS==
<StructureSection load='6est' size='340' side='right'caption='[[6est]], [[Resolution|resolution]] 1.80&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[6est]] 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=6EST OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6EST FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.8&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=DMF:DIMETHYLFORMAMIDE'>DMF</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'>[https://proteopedia.org/fgij/fg.htm?mol=6est FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6est OCA], [https://pdbe.org/6est PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6est RCSB], [https://www.ebi.ac.uk/pdbsum/6est PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6est ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/CELA1_PIG CELA1_PIG] Acts upon elastin.
== 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/es/6est_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.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=6est ConSurf].
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== Publication Abstract from PubMed ==
The peptide trifluoroacetyl-Leu-Ala-(p-trifluoromethylanilide), is a reversible inhibitor of pancreatic porcine elastase and is characterized by a Km of 2.5 x 10(-8) M. Co-crystals of the 1:1 complex were obtained in an acetate buffer + dimethylformamide solution at pH 5.7. Diffraction data were recorded on films at the LURE synchrotron facility. The inhibitor was localized on difference Fourier maps, and the refinement of the structure was performed by simulated annealing (XPLOR). The current agreement factor is R = 19% (for 13224 observed structure factors and 1.8 A effective resolution). The RMS deviations from ideality of bond distances and angles are 0.02 A and 2 degrees, respectively. The inhibitor molecule was found in the active site, bent around the side chain of Phe-215 in a geometry that resembles the previously reported structure of the CF3-Lys-Ala complex at 2.5 A, in a parallel beta-sheet association with the loop 214-216. The analysis of the close contacts (less than 3.5 A) indicates that the trifluoromethylamide bond interacts with the active site and not the Leu-Ala or Ala-anilide bonds. The two fluorinated groups of the inhibitor exhibit different specificities: the trifluoroacetyl group (N terminus) is tightly stacked between the two chain loops 191-195 and 213-215, while the trifluoromethylanilide (C terminus) shows less specificity and only a single contact.

Interaction of the peptide CF3-Leu-Ala-NH-C6H4-CF3 (TFLA) with porcine pancreatic elastase. X-ray studies at 1.8 A.,de la Sierra IL, Papamichael E, Sakarellos C, Dimicoli JL, Prange T J Mol Recognit. 1990 Feb;3(1):36-44. PMID:2354062<ref>PMID:2354062</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 6est" style="background-color:#fffaf0;"></div>

==See Also==
*[[Elastase 3D structures|Elastase 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Sus scrofa]]
[[Category: Li De Lasierra I]]
[[Category: Prange T]]