View source for 2bhb


==Zn substituted E. coli Aminopeptidase P==
<StructureSection load='2bhb' size='340' side='right'caption='[[2bhb]], [[Resolution|resolution]] 2.41&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[2bhb]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/"bacillus_coli"_migula_1895 "bacillus coli" migula 1895]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2BHB OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2BHB FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=FLC:CITRATE+ANION'>FLC</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=MRD:(4R)-2-METHYLPENTANE-2,4-DIOL'>MRD</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1a16|1a16]], [[1jaw|1jaw]], [[1m35|1m35]], [[1n51|1n51]], [[1w2m|1w2m]], [[1w7v|1w7v]], [[1wbq|1wbq]], [[1wl6|1wl6]], [[1wl9|1wl9]], [[1wlr|1wlr]], [[2bh3|2bh3]], [[2bha|2bha]], [[2bhc|2bhc]], [[2bhd|2bhd]], [[2bn7|2bn7]], [[2bws|2bws]], [[2bwt|2bwt]], [[2bwu|2bwu]], [[2bwv|2bwv]], [[2bww|2bww]], [[2bwx|2bwx]], [[2bwy|2bwy]]</td></tr>
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Xaa-Pro_aminopeptidase Xaa-Pro aminopeptidase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.4.11.9 3.4.11.9] </span></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2bhb FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2bhb OCA], [http://pdbe.org/2bhb PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2bhb RCSB], [http://www.ebi.ac.uk/pdbsum/2bhb PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=2bhb ProSAT]</span></td></tr>
</table>
== 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/bh/2bhb_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=2bhb ConSurf].
<div style="clear:both"></div>
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== Publication Abstract from PubMed ==
The effect of metal substitution on the activity and structure of the aminopeptidase P (APPro) from Escherichia coli has been investigated. Measurements of activity in the presence of Mn2+, Mg2+, Zn2+, Na+, and Ca2+ show that significant activity is seen only in the Mn-bound form of the enzyme. The addition of Zn2+ to [MnMn(APPro)] is strongly inhibitory. Crystal structures of [MnMn(APPro)], [MgMg(APPro)], [ZnZn(APPro)], [ZnMg(APPro)], [Ca_(APPro)], [Na_(APPro)], and [apo(APPro)] were determined. The structures of [Ca_(APPro)] and [Na_(APPro)] have a single metal atom at their active site. Surprisingly, when a tripeptide substrate (ValProLeu) was soaked into [Na_(APPro)] crystals in the presence of 200 mM Mg2+, the structure had substrate, but no metal, bound at the active site. The structure of apo APPro complexed with ValProLeu shows that the N-terminal amino group of a substrate can be bound at the active site by carboxylate side chains that normally bind the second metal atom, providing a model for substrate binding in a single-metal active enzyme. Structures of [MnMn(APPro)] and [ZnZn(APPro)] complexes of ProLeu, a product inhibitor, in the presence of excess Zn reveal a third metal-binding site, formed by two conserved His residues and the dipeptide inhibitor. A Zn atom bound at such a site would stabilize product binding and enhance inhibition.

Structural and functional implications of metal ion selection in aminopeptidase P, a metalloprotease with a dinuclear metal center.,Graham SC, Bond CS, Freeman HC, Guss JM Biochemistry. 2005 Oct 25;44(42):13820-36. PMID:16229471<ref>PMID:16229471</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 2bhb" style="background-color:#fffaf0;"></div>

==See Also==
*[[Aminopeptidase 3D structures|Aminopeptidase 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Bacillus coli migula 1895]]
[[Category: Large Structures]]
[[Category: Xaa-Pro aminopeptidase]]
[[Category: Bond, C S]]
[[Category: Freeman, H C]]
[[Category: Graham, S C]]
[[Category: Guss, J M]]
[[Category: Dinuclear hydrolase]]
[[Category: Hydrolase]]
[[Category: Metalloenzyme]]
[[Category: Pita-bread fold]]
[[Category: Proline-specific peptidase]]