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{{STRUCTURE_1d6n|  PDB=1d6n  |  SCENE=  }}
===TERNARY COMPLEX STRUCTURE OF HUMAN HGPRTASE, PRPP, MG2+, AND THE INHIBITOR HPP REVEALS THE INVOLVEMENT OF THE FLEXIBLE LOOP IN SUBSTRATE BINDING===
{{ABSTRACT_PUBMED_10338013}}


==Disease==
==TERNARY COMPLEX STRUCTURE OF HUMAN HGPRTASE, PRPP, MG2+, AND THE INHIBITOR HPP REVEALS THE INVOLVEMENT OF THE FLEXIBLE LOOP IN SUBSTRATE BINDING==
[[http://www.uniprot.org/uniprot/HPRT_HUMAN HPRT_HUMAN]] Defects in HPRT1 are the cause of Lesch-Nyhan syndrome (LNS) [MIM:[http://omim.org/entry/300322 300322]]. LNS is characterized by complete lack of enzymatic activity that results in hyperuricemia, choreoathetosis, mental retardation, and compulsive self-mutilation.<ref>PMID:6853716</ref><ref>PMID:3384338</ref><ref>PMID:3265398</ref><ref>PMID:2910902</ref><ref>PMID:2347587</ref><ref>PMID:2358296</ref><ref>PMID:2246854</ref><ref>PMID:2071157</ref><ref>PMID:7627191</ref><ref>PMID:9452051</ref> Defects in HPRT1 are the cause of gout HPRT-related (GOUT-HPRT) [MIM:[http://omim.org/entry/300323 300323]]; also known as HPRT-related gout or Kelley-Seegmiller syndrome. Gout is characterized by partial enzyme activity and hyperuricemia.<ref>PMID:6853490</ref><ref>PMID:6572373</ref><ref>PMID:6706936</ref><ref>PMID:3358423</ref><ref>PMID:3198771</ref><ref>PMID:2909537</ref>[:]  
<StructureSection load='1d6n' size='340' side='right'caption='[[1d6n]], [[Resolution|resolution]] 2.70&Aring;' scene=''>
 
== Structural highlights ==
==Function==
<table><tr><td colspan='2'>[[1d6n]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. The July 2012 RCSB PDB [https://pdb.rcsb.org/pdb/static.do?p=education_discussion/molecule_of_the_month/index.html Molecule of the Month] feature on ''Hypoxanthine-guanine phosphoribosyltransferase (HGPRT)''  by David Goodsell is [https://dx.doi.org/10.2210/rcsb_pdb/mom_2012_7 10.2210/rcsb_pdb/mom_2012_7]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1D6N OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1D6N FirstGlance]. <br>
[[http://www.uniprot.org/uniprot/HPRT_HUMAN HPRT_HUMAN]] Converts guanine to guanosine monophosphate, and hypoxanthine to inosine monophosphate. Transfers the 5-phosphoribosyl group from 5-phosphoribosylpyrophosphate onto the purine. Plays a central role in the generation of purine nucleotides through the purine salvage pathway.  
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.7&#8491;</td></tr>
 
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=PPO:3H-PYRAZOLO[4,3-D]PYRIMIDIN-7-OL'>PPO</scene>, <scene name='pdbligand=PRP:ALPHA-PHOSPHORIBOSYLPYROPHOSPHORIC+ACID'>PRP</scene></td></tr>
==About this Structure==
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1d6n FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1d6n OCA], [https://pdbe.org/1d6n PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1d6n RCSB], [https://www.ebi.ac.uk/pdbsum/1d6n PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1d6n ProSAT]</span></td></tr>
[[1d6n]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1D6N OCA].  
</table>
== Disease ==
[https://www.uniprot.org/uniprot/HPRT_HUMAN HPRT_HUMAN] Defects in HPRT1 are the cause of Lesch-Nyhan syndrome (LNS) [MIM:[https://omim.org/entry/300322 300322]. LNS is characterized by complete lack of enzymatic activity that results in hyperuricemia, choreoathetosis, mental retardation, and compulsive self-mutilation.<ref>PMID:6853716</ref> <ref>PMID:3384338</ref> <ref>PMID:3265398</ref> <ref>PMID:2910902</ref> <ref>PMID:2347587</ref> <ref>PMID:2358296</ref> <ref>PMID:2246854</ref> <ref>PMID:2071157</ref> <ref>PMID:7627191</ref> <ref>PMID:9452051</ref>   Defects in HPRT1 are the cause of gout HPRT-related (GOUT-HPRT) [MIM:[https://omim.org/entry/300323 300323]; also known as HPRT-related gout or Kelley-Seegmiller syndrome. Gout is characterized by partial enzyme activity and hyperuricemia.<ref>PMID:6853490</ref> <ref>PMID:6572373</ref> <ref>PMID:6706936</ref> <ref>PMID:3358423</ref> <ref>PMID:3198771</ref> <ref>PMID:2909537</ref> [:]
== Function ==
[https://www.uniprot.org/uniprot/HPRT_HUMAN HPRT_HUMAN] Converts guanine to guanosine monophosphate, and hypoxanthine to inosine monophosphate. Transfers the 5-phosphoribosyl group from 5-phosphoribosylpyrophosphate onto the purine. Plays a central role in the generation of purine nucleotides through the purine salvage pathway.
== 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/d6/1d6n_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=1d6n ConSurf].
<div style="clear:both"></div>


==See Also==
==See Also==
*[[Phosphoribosyltransferase|Phosphoribosyltransferase]]
*[[Phosphoribosyltransferase 3D structures|Phosphoribosyltransferase 3D structures]]
 
== References ==
==Reference==
<references/>
<ref group="xtra">PMID:010338013</ref><references group="xtra"/><references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Homo sapiens]]
[[Category: Hypoxanthine phosphoribosyltransferase]]
[[Category: Large Structures]]
[[Category: Balendiran, G K.]]
[[Category: RCSB PDB Molecule of the Month]]
[[Category: Hgprtase]]
[[Category: Balendiran GK]]
[[Category: Transferase]]