4eca

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{{Seed}}
 
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[[Image:4eca.png|left|200px]]
 
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==ASPARAGINASE FROM E. COLI, MUTANT T89V WITH COVALENTLY BOUND ASPARTATE==
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The line below this paragraph, containing "STRUCTURE_4eca", creates the "Structure Box" on the page.
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<StructureSection load='4eca' size='340' side='right'caption='[[4eca]], [[Resolution|resolution]] 2.20&Aring;' scene=''>
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You may change the PDB parameter (which sets the PDB file loaded into the applet)
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== Structural highlights ==
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or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
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<table><tr><td colspan='2'>[[4eca]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli_K-12 Escherichia coli K-12]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4ECA OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4ECA FirstGlance]. <br>
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or leave the SCENE parameter empty for the default display.
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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]] 2.2&#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=AEI:THREONINE-ASPARTIC+ESTER'>AEI</scene></td></tr>
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{{STRUCTURE_4eca| PDB=4eca | SCENE= }}
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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=4eca FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4eca OCA], [https://pdbe.org/4eca PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4eca RCSB], [https://www.ebi.ac.uk/pdbsum/4eca PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4eca ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/ASPG2_ECOLI ASPG2_ECOLI]
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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/ec/4eca_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.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=4eca 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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Escherichia coli asparaginase II catalyzes the hydrolysis of L-asparagine to L-aspartate via a threonine-bound acyl-enzyme intermediate. A nearly inactive mutant in which one of the active site threonines, Thr-89, was replaced by valine was constructed, expressed, and crystallized. Its structure, solved at 2.2 A resolution, shows high overall similarity to the wild-type enzyme, but an aspartyl moiety is covalently bound to Thr-12, resembling a reaction intermediate. Kinetic analysis confirms the deacylation deficiency, which is also explained on a structural basis. The previously identified oxyanion hole is described in more detail.
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===ASPARAGINASE FROM E. COLI, MUTANT T89V WITH COVALENTLY BOUND ASPARTATE===
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A covalently bound catalytic intermediate in Escherichia coli asparaginase: crystal structure of a Thr-89-Val mutant.,Palm GJ, Lubkowski J, Derst C, Schleper S, Rohm KH, Wlodawer A FEBS Lett. 1996 Jul 22;390(2):211-6. PMID:8706862<ref>PMID:8706862</ref>
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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</div>
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<div class="pdbe-citations 4eca" style="background-color:#fffaf0;"></div>
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==See Also==
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The line below this paragraph, {{ABSTRACT_PUBMED_8706862}}, adds the Publication Abstract to the page
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*[[Asparaginase 3D structures|Asparaginase 3D structures]]
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(as it appears on PubMed at http://www.pubmed.gov), where 8706862 is the PubMed ID number.
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== References ==
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<references/>
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{{ABSTRACT_PUBMED_8706862}}
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__TOC__
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</StructureSection>
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==About this Structure==
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[[Category: Escherichia coli K-12]]
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4ECA is a 4 chains structure of sequences from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4ECA OCA].
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[[Category: Large Structures]]
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[[Category: Lubkowski J]]
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==Reference==
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[[Category: Palm GJ]]
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<ref group="xtra">PMID:8706862</ref><references group="xtra"/>
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[[Category: Wlodawer A]]
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[[Category: Asparaginase]]
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[[Category: Escherichia coli]]
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[[Category: Lubkowski, J.]]
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[[Category: Palm, G J.]]
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[[Category: Wlodawer, A.]]
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[[Category: Acyl-enzyme intermediate]]
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[[Category: Hydrolase]]
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[[Category: Threonine amidohydrolase]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Feb 17 16:34:05 2009''
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Current revision

ASPARAGINASE FROM E. COLI, MUTANT T89V WITH COVALENTLY BOUND ASPARTATE

PDB ID 4eca

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