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| | <StructureSection load='2hqq' size='340' side='right'caption='[[2hqq]], [[Resolution|resolution]] 1.86Å' scene=''> | | <StructureSection load='2hqq' size='340' side='right'caption='[[2hqq]], [[Resolution|resolution]] 1.86Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[2hqq]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Human Human]. 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> | + | <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='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.86Å</td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">KHK ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</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='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[https://en.wikipedia.org/wiki/Ketohexokinase Ketohexokinase], with EC number [https://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.1.3 2.7.1.3] </span></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> | | <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> | | </table> |
| | == Disease == | | == 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>
| + | [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 == | | == Evolutionary Conservation == |
| | [[Image:Consurf_key_small.gif|200px|right]] | | [[Image:Consurf_key_small.gif|200px|right]] |
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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Human]] | + | [[Category: Homo sapiens]] |
| - | [[Category: Ketohexokinase]]
| + | |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Asipu, A]] | + | [[Category: Asipu A]] |
| - | [[Category: Bonthron, D T]] | + | [[Category: Bonthron DT]] |
| - | [[Category: Phillips, S E.V]] | + | [[Category: Phillips SEV]] |
| - | [[Category: Trinh, C H]] | + | [[Category: Trinh CH]] |
| - | [[Category: Fructose kinase]]
| + | |
| - | [[Category: Transferase]]
| + | |
| Structural highlights
Disease
KHK_HUMAN Defects in KHK are the cause of fructosuria (FRUCT) [MIM:229800. Benign defect of intermediary metabolism.[1] [2]
Function
KHK_HUMAN
Evolutionary Conservation
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
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[3]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Trinh CH, Asipu A, Bonthron DT, Phillips SE. Structures of alternatively spliced isoforms of human ketohexokinase. Acta Crystallogr D Biol Crystallogr. 2009 Mar;65(Pt 3):201-11. Epub 2009, Feb 20. PMID:19237742 doi:S0907444908041115
- ↑ Bonthron DT, Brady N, Donaldson IA, Steinmann B. Molecular basis of essential fructosuria: molecular cloning and mutational analysis of human ketohexokinase (fructokinase). Hum Mol Genet. 1994 Sep;3(9):1627-31. PMID:7833921
- ↑ Trinh CH, Asipu A, Bonthron DT, Phillips SE. Structures of alternatively spliced isoforms of human ketohexokinase. Acta Crystallogr D Biol Crystallogr. 2009 Mar;65(Pt 3):201-11. Epub 2009, Feb 20. PMID:19237742 doi:S0907444908041115
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