4eca: Difference between revisions

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{{Seed}}
[[Image:4eca.png|left|200px]]


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==ASPARAGINASE FROM E. COLI, MUTANT T89V WITH COVALENTLY BOUND ASPARTATE==
The line below this paragraph, containing "STRUCTURE_4eca", creates the "Structure Box" on the page.
<StructureSection load='4eca' size='340' side='right'caption='[[4eca]], [[Resolution|resolution]] 2.20&Aring;' scene=''>
You may change the PDB parameter (which sets the PDB file loaded into the applet)
== Structural highlights ==
or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
<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>
or leave the SCENE parameter empty for the default display.
</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>
{{STRUCTURE_4eca|  PDB=4eca  |  SCENE=  }}
<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>
</table>
== Function ==
[https://www.uniprot.org/uniprot/ASPG2_ECOLI ASPG2_ECOLI]
== 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/ec/4eca_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=4eca ConSurf].
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
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.


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


From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 4eca" style="background-color:#fffaf0;"></div>


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==See Also==
The line below this paragraph, {{ABSTRACT_PUBMED_8706862}}, adds the Publication Abstract to the page
*[[Asparaginase 3D structures|Asparaginase 3D structures]]
(as it appears on PubMed at http://www.pubmed.gov), where 8706862 is the PubMed ID number.
== References ==
-->
<references/>
{{ABSTRACT_PUBMED_8706862}}
__TOC__
 
</StructureSection>
==About this Structure==
[[Category: Escherichia coli K-12]]
4ECA is a [[Single protein]] structure of sequence 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].
[[Category: Large Structures]]
 
[[Category: Lubkowski J]]
==Reference==
[[Category: Palm GJ]]
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:[http://www.ncbi.nlm.nih.gov/pubmed/8706862 8706862]
[[Category: Wlodawer A]]
[[Category: Asparaginase]]
[[Category: Escherichia coli]]
[[Category: Single protein]]
[[Category: Lubkowski, J.]]
[[Category: Palm, G J.]]
[[Category: Wlodawer, A.]]
[[Category: Acyl-enzyme intermediate]]
[[Category: Hydrolase]]
[[Category: Threonine amidohydrolase]]
 
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Retrieved from "https://proteopedia.org/4eca"