View source for 2hqq


==Crystal structure of human ketohexokinase complexed to different sugar molecules==
<StructureSection load='2hqq' size='340' side='right'caption='[[2hqq]], [[Resolution|resolution]] 1.86&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[2hqq]] 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=2HQQ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2HQQ 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]] 1.86&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=SO4:SULFATE+ION'>SO4</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=2hqq FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2hqq OCA], [https://pdbe.org/2hqq PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2hqq RCSB], [https://www.ebi.ac.uk/pdbsum/2hqq PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2hqq ProSAT]</span></td></tr>
</table>
== Disease ==
[https://www.uniprot.org/uniprot/KHK_HUMAN KHK_HUMAN] Defects in KHK are the cause of fructosuria (FRUCT) [MIM:[https://omim.org/entry/229800 229800]. Benign defect of intermediary metabolism.<ref>PMID:19237742</ref> <ref>PMID:7833921</ref> 
== Function ==
[https://www.uniprot.org/uniprot/KHK_HUMAN KHK_HUMAN] 
== 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/hq/2hqq_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=2hqq ConSurf].
<div style="clear:both"></div>
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== Publication Abstract from PubMed ==
A molecular understanding of the unique aspects of dietary fructose metabolism may be the key to understanding and controlling the current epidemic of fructose-related obesity, diabetes and related adverse metabolic states in Western populations. Fructose catabolism is initiated by its phosphorylation to fructose 1-phosphate, which is performed by ketohexokinase (KHK). Here, the crystal structures of the two alternatively spliced isoforms of human ketohexokinase, hepatic KHK-C and the peripheral isoform KHK-A, and of the ternary complex of KHK-A with the substrate fructose and AMP-PNP are reported. The structure of the KHK-A ternary complex revealed an active site with both the substrate fructose and the ATP analogue in positions ready for phosphorylation following a reaction mechanism similar to that of the pfkB family of carbohydrate kinases. Hepatic KHK deficiency causes the benign disorder essential fructosuria. The effects of the disease-causing mutations (Gly40Arg and Ala43Thr) have been modelled in the context of the KHK structure.

Structures of alternatively spliced isoforms of human ketohexokinase.,Trinh CH, Asipu A, Bonthron DT, Phillips SE Acta Crystallogr D Biol Crystallogr. 2009 Mar;65(Pt 3):201-11. Epub 2009, Feb 20. PMID:19237742<ref>PMID:19237742</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 2hqq" style="background-color:#fffaf0;"></div>

==See Also==
*[[Ketohexokinase|Ketohexokinase]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Asipu A]]
[[Category: Bonthron DT]]
[[Category: Phillips SEV]]
[[Category: Trinh CH]]