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[[Image:1lan.gif|left|200px]]<br /><applet load="1lan" size="350" color="white" frame="true" align="right" spinBox="true"
caption="1lan, resolution 1.9&Aring;" />
'''LEUCINE AMINOPEPTIDASE COMPLEX WITH L-LEUCINAL'''<br />


==Overview==
==LEUCINE AMINOPEPTIDASE COMPLEX WITH L-LEUCINAL==
The three-dimensional structures of bovine lens leucine aminopeptidase (blLAP) complexed with L-leucinal and of the unliganded enzyme have been determined at crystallographic resolutions of 1.9 and 1.6 A, respectively. Leucinal binds as a hydrated gem-diol to the active site of b1LAP), resembling the presumed gem-diolated intermediate in the catalytic pathway. One hydroxyl group bridges the two active site metal ions, and the other OH group is coordinated to Zn1. The high-resolution structure of the unliganded enzyme reveals one metal-bound water ligand, which is bridging both zinc ions. Together, these structures support a mechanism in which the bridging water ligand is the attacking hydroxide ion nucleophile. The gem-diolate intermediate is probably stabilized by four coordinating bonds to the dizinc center and by interaction with Lys-262 and Arg-336. In the mechanism, Lys-262 polarizes the peptide carbonyl group, which is also coordinated to Zn1. The Arg-336 side chain interacts with the substrate and the gem-diolate intermediate via water molecules. Near Arg-336 in the b1LAP-leucinal structure, an unusually short hydrogen bond is found between two active site water molecules.
<StructureSection load='1lan' size='340' side='right'caption='[[1lan]], [[Resolution|resolution]] 1.90&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1lan]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Bos_taurus Bos taurus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1LAN OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1LAN 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]] 1.9&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=LEU:LEUCINE'>LEU</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='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1lan FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1lan OCA], [https://pdbe.org/1lan PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1lan RCSB], [https://www.ebi.ac.uk/pdbsum/1lan PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1lan ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/AMPL_BOVIN AMPL_BOVIN] Presumably involved in the processing and regular turnover of intracellular proteins. Catalyzes the removal of unsubstituted N-terminal amino acids from various peptides.
== 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/la/1lan_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=1lan ConSurf].
<div style="clear:both"></div>


==About this Structure==
==See Also==
1LAN is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Bos_taurus Bos taurus] with <scene name='pdbligand=ZN:'>ZN</scene>, <scene name='pdbligand=LEU:'>LEU</scene> and <scene name='pdbligand=MRD:'>MRD</scene> as [http://en.wikipedia.org/wiki/ligands ligands]. Active as [http://en.wikipedia.org/wiki/Leucyl_aminopeptidase Leucyl aminopeptidase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.4.11.1 3.4.11.1] Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1LAN OCA].
*[[Aminopeptidase 3D structures|Aminopeptidase 3D structures]]
 
__TOC__
==Reference==
</StructureSection>
Two-metal ion mechanism of bovine lens leucine aminopeptidase: active site solvent structure and binding mode of L-leucinal, a gem-diolate transition state analogue, by X-ray crystallography., Strater N, Lipscomb WN, Biochemistry. 1995 Nov 14;34(45):14792-800. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=7578088 7578088]
[[Category: Bos taurus]]
[[Category: Bos taurus]]
[[Category: Leucyl aminopeptidase]]
[[Category: Large Structures]]
[[Category: Single protein]]
[[Category: Lipscomb WN]]
[[Category: Lipscomb, W N.]]
[[Category: Straeter N]]
[[Category: Straeter, N.]]
[[Category: LEU]]
[[Category: MRD]]
[[Category: ZN]]
[[Category: aminopeptidase]]
[[Category: exopeptidase]]
[[Category: metallopeptidase]]
 
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 13:43:07 2008''
Retrieved from "https://proteopedia.org/1lan"