View source for 3w82


==Human alpha-L-iduronidase in complex with iduronic acid==
<StructureSection load='3w82' size='340' side='right'caption='[[3w82]], [[Resolution|resolution]] 2.76&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[3w82]] is a 2 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=3W82 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3W82 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]] 2.76&#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=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=FUC:ALPHA-L-FUCOSE'>FUC</scene>, <scene name='pdbligand=IDR:L-IDURONIC+ACID'>IDR</scene>, <scene name='pdbligand=MAN:ALPHA-D-MANNOSE'>MAN</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene>, <scene name='pdbligand=PO3:PHOSPHITE+ION'>PO3</scene>, <scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</scene>, <scene name='pdbligand=TLA:L(+)-TARTARIC+ACID'>TLA</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=3w82 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3w82 OCA], [https://pdbe.org/3w82 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3w82 RCSB], [https://www.ebi.ac.uk/pdbsum/3w82 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3w82 ProSAT]</span></td></tr>
</table>
== Disease ==
[https://www.uniprot.org/uniprot/IDUA_HUMAN IDUA_HUMAN] Hurler-Scheie syndrome;Hurler syndrome;Scheie syndrome. Defects in IDUA are the cause of mucopolysaccharidosis type 1H (MPS1H) [MIM:[https://omim.org/entry/607014 607014]; also known as Hurler syndrome. MPS1H is a severe form of mucopolysaccharidosis type 1, a rare lysosomal storage disease characterized by progressive physical deterioration with urinary excretion of dermatan sulfate and heparan sulfate. Patients with MPS1H usually present, within the first year of life, a combination of hepatosplenomegaly, skeletal deformities, corneal clouding and severe mental retardation. Obstructive airways disease, respiratory infection and cardiac complications usually result in death before 10 years of age.<ref>PMID:8019563</ref> <ref>PMID:8401515</ref> <ref>PMID:8328452</ref> <ref>PMID:1301941</ref> <ref>PMID:7951228</ref> <ref>PMID:7550232</ref> <ref>PMID:7550242</ref> <ref>PMID:1946389</ref> <ref>PMID:10466419</ref> <ref>PMID:10735634</ref> <ref>PMID:12559846</ref> <ref>PMID:15300847</ref> <ref>PMID:21394825</ref>   Defects in IDUA are the cause of mucopolysaccharidosis type 1H/S (MPS1H/S) [MIM:[https://omim.org/entry/607015 607015]; also known as Hurler-Scheie syndrome. MPS1H/S is a form of mucopolysaccharidosis type 1, a rare lysosomal storage disease characterized by progressive physical deterioration with urinary excretion of dermatan sulfate and heparan sulfate. MPS1H/S represents an intermediate phenotype of the MPS1 clinical spectrum. It is characterized by relatively little neurological involvement, but most of the somatic symptoms described for severe MPS1 develop in the early to mid-teens, causing considerable loss of mobility.  Defects in IDUA are the cause of mucopolysaccharidosis type 1S (MPS1S) [MIM:[https://omim.org/entry/607016 607016]; also known as Scheie syndrome. MPS1S is a mild form of mucopolysaccharidosis type 1, a rare lysosomal storage disease characterized by progressive physical deterioration with urinary excretion of dermatan sulfate and heparan sulfate. Patients with MPS1S may have little or no neurological involvement, normal stature and life span, but present development of joints stiffness, mild hepatosplenomegaly, aortic valve disease and corneal clouding.
== Function ==
[https://www.uniprot.org/uniprot/IDUA_HUMAN IDUA_HUMAN] 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
N-glycosylation is a major posttranslational modification that endows proteins with various functions. It is established that N-glycans are essential for the correct folding and stability of some enzymes; however, the actual effects of N-glycans on their activities are poorly understood. Here, we show that human alpha-l-iduronidase (hIDUA), of which a dysfunction causes accumulation of dermatan/heparan sulfate leading to mucopolysaccharidosis type I, uses its own N-glycan as a substrate binding and catalytic module. Structural analysis revealed that the mannose residue of the N-glycan attached to N372 constituted a part of the substrate-binding pocket and interacted directly with a substrate. A deglycosylation study showed that enzyme activity was highly correlated with the N-glycan attached to N372. The kinetics of native and deglycosylated hIDUA suggested that the N-glycan is also involved in catalytic processes. Our study demonstrates a previously unrecognized function of N-glycans.

Human alpha-L-iduronidase uses its own N-glycan as a substrate-binding and catalytic module.,Maita N, Tsukimura T, Taniguchi T, Saito S, Ohno K, Taniguchi H, Sakuraba H Proc Natl Acad Sci U S A. 2013 Sep 3;110(36):14628-33. doi:, 10.1073/pnas.1306939110. Epub 2013 Aug 19. PMID:23959878<ref>PMID:23959878</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 3w82" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Maita N]]
[[Category: Ohno K]]
[[Category: Saito S]]
[[Category: Sakuraba H]]
[[Category: Taniguchi H]]
[[Category: Taniguchi T]]
[[Category: Tsukimura T]]