View source for 1vkj


==Crystal structure of heparan sulfate 3-O-sulfotransferase isoform 1 in the presence of PAP==
<StructureSection load='1vkj' size='340' side='right'caption='[[1vkj]], [[Resolution|resolution]] 2.50&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1vkj]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/Lk3_transgenic_mice Lk3 transgenic mice]. This structure supersedes the now removed PDB entry [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=1s6t 1s6t]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1VKJ OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1VKJ FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=A3P:ADENOSINE-3-5-DIPHOSPHATE'>A3P</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr>
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1nst|1nst]]</td></tr>
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/[Heparan_sulfate]-glucosamine_3-sulfotransferase_1 [Heparan sulfate]-glucosamine 3-sulfotransferase 1], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.8.2.23 2.8.2.23] </span></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1vkj FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1vkj OCA], [http://pdbe.org/1vkj PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1vkj RCSB], [http://www.ebi.ac.uk/pdbsum/1vkj PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1vkj ProSAT]</span></td></tr>
</table>
== Function ==
[[http://www.uniprot.org/uniprot/HS3S1_MOUSE HS3S1_MOUSE]] Sulfotransferase that utilizes 3'-phospho-5'-adenylyl sulfate (PAPS) to catalyze the transfer of a sulfo group to position 3 of glucosamine residues in heparan. Catalyzes the rate limiting step in the biosynthesis of heparan sulfate (HSact). This modification is a crucial step in the biosynthesis of anticoagulant heparan sulfate as it completes the structure of the antithrombin pentasaccharide binding site.<ref>PMID:9346953</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/vk/1vkj_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=1vkj ConSurf].
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== Publication Abstract from PubMed ==
Heparan sulfate interacts with antithrombin, a protease inhibitor, to regulate blood coagulation. Heparan sulfate 3-O-sulfotransferase isoform 1 performs the crucial last step modification in the biosynthesis of anticoagulant heparan sulfate. This enzyme transfers the sulfuryl group (SO(3)) from 3'-phosphoadenosine 5'-phosphosulfate to the 3-OH position of a glucosamine residue to form the 3-O-sulfo glucosamine, a structural motif critical for binding of heparan sulfate to antithrombin. In this study, we report the crystal structure of 3-O-sulfotransferase isoform 1 at 2.5-A resolution in a binary complex with 3'-phosphoadenosine 5'-phosphate. This structure reveals residues critical for 3'-phosphoadenosine 5'-phosphosulfate binding and suggests residues required for the binding of heparan sulfate. In addition, site-directed mutagenesis analyses suggest that residues Arg-67, Lys-68, Arg-72, Glu-90, His-92, Asp-95, Lys-123, and Arg-276 are essential for enzymatic activity. Among these essential amino acid residues, we find that residues Arg-67, Arg-72, His-92, and Asp-95 are conserved in heparan sulfate 3-O-sulfotransferases but not in heparan N-deacetylase/N-sulfotransferase, suggesting a role for these residues in conferring substrate specificity. Results from this study provide information essential for understanding the biosynthesis of anticoagulant heparan sulfate and the general mechanism of action of heparan sulfate sulfotransferases.

Crystal structure and mutational analysis of heparan sulfate 3-O-sulfotransferase isoform 1.,Edavettal SC, Lee KA, Negishi M, Linhardt RJ, Liu J, Pedersen LC J Biol Chem. 2004 Jun 11;279(24):25789-97. Epub 2004 Apr 1. PMID:15060080<ref>PMID:15060080</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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==See Also==
*[[Sulfotransferase|Sulfotransferase]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Lk3 transgenic mice]]
[[Category: Lee, K A]]
[[Category: Linhardt, R J]]
[[Category: Liu, J]]
[[Category: Negishi, M]]
[[Category: Pedersen, L C]]
[[Category: Thorp, S]]
[[Category: Heparan sulfate]]
[[Category: Pap]]
[[Category: Papss]]
[[Category: Sulfotransferase]]
[[Category: Transferase]]