View source for 1nst


==THE SULFOTRANSFERASE DOMAIN OF HUMAN HAPARIN SULFATE N-DEACETYLASE/N-SULFOTRANSFERASE==
<StructureSection load='1nst' size='340' side='right'caption='[[1nst]], [[Resolution|resolution]] 2.30&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1nst]] is a 1 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=1NST OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1NST 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]] 2.3&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=A3P:ADENOSINE-3-5-DIPHOSPHATE'>A3P</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=1nst FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1nst OCA], [https://pdbe.org/1nst PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1nst RCSB], [https://www.ebi.ac.uk/pdbsum/1nst PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1nst ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/NDST1_HUMAN NDST1_HUMAN] Essential bifunctional enzyme that catalyzes both the N-deacetylation and the N-sulfation of glucosamine (GlcNAc) of the glycosaminoglycan in heparan sulfate. Modifies the GlcNAc-GlcA disaccharide repeating sugar backbone to make N-sulfated heparosan, a prerequisite substrate for later modifications in heparin biosynthesis. Plays a role in determining the extent and pattern of sulfation of heparan sulfate. Compared to other NDST enzymes, its presence is absolutely required. Participates in biosynthesis of heparan sulfate that can ultimately serve as L-selectin ligands, thereby playing a role in inflammatory response.<ref>PMID:10758005</ref> <ref>PMID:12634318</ref> 
== 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/ns/1nst_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=1nst ConSurf].
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Heparan sulfate N-deacetylase/N-sulfotransferase (HSNST) catalyzes the first and obligatory step in the biosynthesis of heparan sulfates and heparin. The crystal structure of the sulfotransferase domain (NST1) of human HSNST-1 has been determined at 2.3-A resolution in a binary complex with 3'-phosphoadenosine 5'-phosphate (PAP). NST1 is approximately spherical with an open cleft, and consists of a single alpha/beta fold with a central five-stranded parallel beta-sheet and a three-stranded anti-parallel beta-sheet bearing an interstrand disulfide bond. The structural regions alpha1, alpha6, beta1, beta7, 5'-phosphosulfate binding loop (between beta1 and alpha1), and a random coil (between beta8 and alpha13) constitute the PAP binding site of NST1. The alpha6 and random coil (between beta2 and alpha2), which form an open cleft near the 5'-phosphate of the PAP molecule, may provide interactions for substrate binding. The conserved residue Lys-614 is in position to form a hydrogen bond with the bridge oxygen of the 5'-phosphate.

Crystal structure of the sulfotransferase domain of human heparan sulfate N-deacetylase/ N-sulfotransferase 1.,Kakuta Y, Sueyoshi T, Negishi M, Pedersen LC J Biol Chem. 1999 Apr 16;274(16):10673-6. PMID:10196134<ref>PMID:10196134</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 1nst" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Kakuta Y]]
[[Category: Negishi M]]
[[Category: Pedersen LC]]