View source for 1ize

==Crystal structure of Aspergillus oryzae Aspartic proteinase complexed with pepstatin==
<StructureSection load='1ize' size='340' side='right' caption='[[1ize]], [[Resolution|resolution]] 1.90&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1ize]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Aspergillus_oryzae Aspergillus oryzae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1IZE OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1IZE FirstGlance]. <br>
</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=MAN:ALPHA-D-MANNOSE'>MAN</scene><br>
<tr><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=IVA:ISOVALERIC+ACID'>IVA</scene>, <scene name='pdbligand=STA:STATINE'>STA</scene></td></tr>
<tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1izd|1izd]]</td></tr>
<tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1ize FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ize OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1ize RCSB], [http://www.ebi.ac.uk/pdbsum/1ize PDBsum]</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/iz/1ize_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/chain_selection.php?pdb_ID=2ata ConSurf].
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The X-ray structures of Aspergillus oryzae aspartic proteinase (AOAP) and its complex with inhibitor pepstatin have been determined at 1.9A resolution. AOAP was crystallized in an orthorhombic system with the space group P2(1)2(1)2(1) and cell dimensions of a=49.4A, b=79.4A, and c=93.6A. By the soaking of pepstatin, crystals are transformed into a monoclinic system with the space group C2 and cell dimensions of a=106.8A, b=38.6A, c=78.7A, and beta=120.3 degrees. The structures of AOAP and AOAP/pepstatin complex were refined to an R-factor of 0.177 (R(free)=0.213) and of 0.185 (0.221), respectively. AOAP has a crescent-shaped structure with two lobes (N-lobe and C-lobe) and the deep active site cleft is constructed between them. At the center of the active site cleft, two Asp residues (Asp33 and Asp214) form the active dyad with a hydrogen bonding solvent molecule between them. Pepstatin binds to the active site cleft via hydrogen bonds and hydrophobic interactions with the enzyme. The structures of AOAP and AOAP/pepstatin complex including interactions between the enzyme and pepstatin are very similar to those of other structure-solved aspartic proteinases and their complexes with pepstatin. Generally, aspartic proteinases cleave a peptide bond between hydrophobic amino acid residues, but AOAP can also recognize the Lys/Arg residue as well as hydrophobic amino acid residues, leading to the activation of trypsinogen and chymotrypsinogen. The X-ray structure of AOAP/pepstatin complex and preliminary modeling show two possible sites of recognition for the positively charged groups of Lys/Arg residues around the active site of AOAP.

Crystal structures of Aspergillus oryzae aspartic proteinase and its complex with an inhibitor pepstatin at 1.9A resolution.,Kamitori S, Ohtaki A, Ino H, Takeuchi M J Mol Biol. 2003 Mar 7;326(5):1503-11. PMID:12595261<ref>PMID:12595261</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>

==See Also==
*[[Proteinase|Proteinase]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Aspergillus oryzae]]
[[Category: Ino, H.]]
[[Category: Kamitori, S.]]
[[Category: Ohtaki, A.]]
[[Category: Takeuchi, M.]]
[[Category: Acid protease]]
[[Category: Hydrolase-hydrolase inhibitor complex]]
[[Category: Sugar binding]]