1qb4: Difference between revisions

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[[Image:1qb4.gif|left|200px]]


<!--
==CRYSTAL STRUCTURE OF MN(2+)-BOUND PHOSPHOENOLPYRUVATE CARBOXYLASE==
The line below this paragraph, containing "STRUCTURE_1qb4", creates the "Structure Box" on the page.
<StructureSection load='1qb4' size='340' side='right'caption='[[1qb4]], [[Resolution|resolution]] 2.60&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'>[[1qb4]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1QB4 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1QB4 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]] 2.6&#8491;</td></tr>
-->
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ASP:ASPARTIC+ACID'>ASP</scene>, <scene name='pdbligand=MN:MANGANESE+(II)+ION'>MN</scene></td></tr>
{{STRUCTURE_1qb4| PDB=1qb4 |  SCENE= }}
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1qb4 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1qb4 OCA], [https://pdbe.org/1qb4 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1qb4 RCSB], [https://www.ebi.ac.uk/pdbsum/1qb4 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1qb4 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/CAPP_ECOLI CAPP_ECOLI] Forms oxaloacetate, a four-carbon dicarboxylic acid source for the tricarboxylic acid cycle.[HAMAP-Rule:MF_00595]
== 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/qb/1qb4_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=1qb4 ConSurf].
<div style="clear:both"></div>


'''CRYSTAL STRUCTURE OF MN(2+)-BOUND PHOSPHOENOLPYRUVATE CARBOXYLASE'''
==See Also==
 
*[[Phosphoenolpyruvate carboxylase|Phosphoenolpyruvate carboxylase]]
 
__TOC__
==Overview==
</StructureSection>
We have determined the crystal structure of Mn2+-bound Escherichia coli phosphoenolpyruvate carboxylase (PEPC) using X-ray diffraction at 2.6 A resolution, and specified the location of enzyme-bound Mn2+, which is essential for catalytic activity. The electron density map reveals that Mn2+ is bound to the side chain oxygens of Glu-506 and Asp-543, and located at the top of the alpha/beta barrel in PEPC. The coordination sphere of Mn2+ observed in E. coli PEPC is similar to that of Mn2+ found in the pyruvate kinase structure. The model study of Mn2+-bound PEPC complexed with phosphoenolpyruvate (PEP) reveals that the side chains of Arg-396, Arg-581 and Arg-713 could interact with PEP.
 
==About this Structure==
1QB4 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=1QB4 OCA].
 
==Reference==
Plausible phosphoenolpyruvate binding site revealed by 2.6 A structure of Mn2+-bound phosphoenolpyruvate carboxylase from Escherichia coli., Matsumura H, Terada M, Shirakata S, Inoue T, Yoshinaga T, Izui K, Kai Y, FEBS Lett. 1999 Sep 17;458(2):93-6. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/10481043 10481043]
[[Category: Escherichia coli]]
[[Category: Escherichia coli]]
[[Category: Phosphoenolpyruvate carboxylase]]
[[Category: Large Structures]]
[[Category: Single protein]]
[[Category: Inoue T]]
[[Category: Inoue, T.]]
[[Category: Izui K]]
[[Category: Izui, K.]]
[[Category: Kai Y]]
[[Category: Kai, Y.]]
[[Category: Matsumura H]]
[[Category: Matsumura, H.]]
[[Category: Shirakata S]]
[[Category: Shirakata, S.]]
[[Category: Terada M]]
[[Category: Terada, M.]]
[[Category: Yoshinaga T]]
[[Category: Yoshinaga, T.]]
[[Category: Alpha beta barrel]]
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May  3 06:05:22 2008''

Latest revision as of 08:14, 14 February 2024

CRYSTAL STRUCTURE OF MN(2+)-BOUND PHOSPHOENOLPYRUVATE CARBOXYLASE

1qb4, resolution 2.60Å

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