2q8i
From Proteopedia
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| - | {{STRUCTURE_2q8i| PDB=2q8i | SCENE= }} | ||
| - | ===Pyruvate dehydrogenase kinase isoform 3 in complex with antitumor drug radicicol=== | ||
| - | {{ABSTRACT_PUBMED_17683942}} | ||
| - | == | + | ==Pyruvate dehydrogenase kinase isoform 3 in complex with antitumor drug radicicol== |
| - | [[2q8i]] is a 2 chain structure with sequence from [ | + | <StructureSection load='2q8i' size='340' side='right'caption='[[2q8i]], [[Resolution|resolution]] 2.60Å' scene=''> |
| + | == Structural highlights == | ||
| + | <table><tr><td colspan='2'>[[2q8i]] is a 2 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=2Q8I OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2Q8I 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]] 2.6Å</td></tr> | ||
| + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=K:POTASSIUM+ION'>K</scene>, <scene name='pdbligand=RDC:RADICICOL'>RDC</scene>, <scene name='pdbligand=RED:DIHYDROLIPOIC+ACID'>RED</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=2q8i FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2q8i OCA], [https://pdbe.org/2q8i PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2q8i RCSB], [https://www.ebi.ac.uk/pdbsum/2q8i PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2q8i ProSAT]</span></td></tr> | ||
| + | </table> | ||
| + | == Function == | ||
| + | [https://www.uniprot.org/uniprot/PDK3_HUMAN PDK3_HUMAN] Inhibits pyruvate dehydrogenase activity by phosphorylation of the E1 subunit PDHA1, and thereby regulates glucose metabolism and aerobic respiration. Can also phosphorylate PDHA2. Decreases glucose utilization and increases fat metabolism in response to prolonged fasting, and as adaptation to a high-fat diet. Plays a role in glucose homeostasis and in maintaining normal blood glucose levels in function of nutrient levels and under starvation. Plays a role in the generation of reactive oxygen species.<ref>PMID:10748134</ref> <ref>PMID:11486000</ref> <ref>PMID:16436377</ref> <ref>PMID:18718909</ref> <ref>PMID:22865452</ref> <ref>PMID:15861126</ref> <ref>PMID:17683942</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/q8/2q8i_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=2q8i ConSurf]. | ||
| + | <div style="clear:both"></div> | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | Pyruvate dehydrogenase kinase (PDK) isoforms are molecular switches that downregulate the pyruvate dehydrogenase complex (PDC) by reversible phosphorylation in mitochondria. We have determined structures of human PDK1 or PDK3 bound to the inhibitors AZD7545, dichloroacetate (DCA), and radicicol. We show that the trifluoromethylpropanamide end of AZD7545 projects into the lipoyl-binding pocket of PDK1. This interaction results in inhibition of PDK1 and PDK3 activities by aborting kinase binding to the PDC scaffold. Paradoxically, AZD7545 at saturating concentrations robustly increases scaffold-free PDK3 activity, similar to the inner lipoyl domain. Good DCA density is present in the helix bundle in the N-terminal domain of PDK1. Bound DCA promotes local conformational changes that are communicated to both nucleotide-binding and lipoyl-binding pockets of PDK1, leading to the inactivation of kinase activity. Finally, radicicol inhibits kinase activity by binding directly to the ATP-binding pocket of PDK3, similar to Hsp90 and Topo VI from the same ATPase/kinase superfamily. | ||
| + | |||
| + | Distinct structural mechanisms for inhibition of pyruvate dehydrogenase kinase isoforms by AZD7545, dichloroacetate, and radicicol.,Kato M, Li J, Chuang JL, Chuang DT Structure. 2007 Aug;15(8):992-1004. Epub 2007 Aug 2. PMID:17683942<ref>PMID:17683942</ref> | ||
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| + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
| + | </div> | ||
| + | <div class="pdbe-citations 2q8i" style="background-color:#fffaf0;"></div> | ||
==See Also== | ==See Also== | ||
*[[Pyruvate dehydrogenase kinase|Pyruvate dehydrogenase kinase]] | *[[Pyruvate dehydrogenase kinase|Pyruvate dehydrogenase kinase]] | ||
| - | + | == References == | |
| - | == | + | <references/> |
| - | < | + | __TOC__ |
| + | </StructureSection> | ||
[[Category: Homo sapiens]] | [[Category: Homo sapiens]] | ||
| - | [[Category: | + | [[Category: Large Structures]] |
| - | [[Category: Chuang | + | [[Category: Chuang DT]] |
| - | [[Category: | + | [[Category: Chuang JL]] |
| - | [[Category: | + | [[Category: Kato M]] |
| - | [[Category: | + | [[Category: Li J]] |
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Current revision
Pyruvate dehydrogenase kinase isoform 3 in complex with antitumor drug radicicol
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Categories: Homo sapiens | Large Structures | Chuang DT | Chuang JL | Kato M | Li J
