View source for 1apy


==HUMAN ASPARTYLGLUCOSAMINIDASE==
<StructureSection load='1apy' size='340' side='right'caption='[[1apy]], [[Resolution|resolution]] 2.00&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1apy]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1APY OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1APY 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]] 2&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=BMA:BETA-D-MANNOSE'>BMA</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</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=1apy FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1apy OCA], [https://pdbe.org/1apy PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1apy RCSB], [https://www.ebi.ac.uk/pdbsum/1apy PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1apy ProSAT]</span></td></tr>
</table>
== Disease ==
[https://www.uniprot.org/uniprot/ASPG_HUMAN ASPG_HUMAN] Defects in AGA are the cause of aspartylglucosaminuria (AGU) [MIM:[https://omim.org/entry/208400 208400]. AGU is an inborn lysosomal storage disease. Clinical features of AGU include mild to severe mental retardation manifesting from the age of 2, coarse facial features and mild connective tissue abnormalities. This recessively inherited disease is overrepresented in the Finnish population.<ref>PMID:1703489</ref> <ref>PMID:1904874</ref> <ref>PMID:2011603</ref> <ref>PMID:8776587</ref> <ref>PMID:9137882</ref> <ref>PMID:11309371</ref> 
== Function ==
[https://www.uniprot.org/uniprot/ASPG_HUMAN ASPG_HUMAN] Cleaves the GlcNAc-Asn bond which joins oligosaccharides to the peptide of asparagine-linked glycoproteins.
== 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/ap/1apy_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.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=1apy ConSurf].
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== Publication Abstract from PubMed ==
The high resolution crystal structure of human lysosomal aspartylglucosaminidase (AGA) has been determined. This lysosomal enzyme is synthesized as a single polypeptide precursor, which is immediately post-translationally cleaved into alpha- and beta-subunits. Two alpha- and beta-chains are found to pack together forming the final heterotetrameric structure. The catalytically essential residue, the N-terminal threonine of the beta-chain is situated in the deep pocket of the funnel-shaped active site. On the basis of the structure of the enzyme-product complex we present a catalytic mechanism for this lysosomal enzyme with an exceptionally high pH optimum. The three-dimensional structure also allows the prediction of the structural consequences of human mutations resulting in aspartylglucosaminuria (AGU), a lysosomal storage disease.

Three-dimensional structure of human lysosomal aspartylglucosaminidase.,Oinonen C, Tikkanen R, Rouvinen J, Peltonen L Nat Struct Biol. 1995 Dec;2(12):1102-8. PMID:8846222<ref>PMID:8846222</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 1apy" style="background-color:#fffaf0;"></div>

==See Also==
*[[Glycosylasparaginase|Glycosylasparaginase]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Oinonen C]]
[[Category: Rouvinen J]]