2q8h

From Proteopedia

(Difference between revisions)

Revision as of 09:41, 18 October 2017

Structure of pyruvate dehydrogenase kinase isoform 1 in complex with dichloroacetate (DCA)

Structural highlights

2q8h is a 1 chain structure with sequence from Human. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	,
Related:	2q8f, 2q8g, 2q8i
Gene:	PDK1 (HUMAN)
Activity:	[Pyruvate_dehydrogenase_(acetyl-transferring)_kinase [Pyruvate dehydrogenase (acetyl-transferring)] kinase], with EC number 2.7.11.2
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[PDK1_HUMAN] Serine/threonine kinase that plays a key role in regulation of glucose and fatty acid metabolism and homeostasis via phosphorylation of the pyruvate dehydrogenase subunits PDHA1 and PDHA2. This inhibits pyruvate dehydrogenase activity, and thereby regulates metabolite flux through the tricarboxylic acid cycle, down-regulates aerobic respiration and inhibits the formation of acetyl-coenzyme A from pyruvate. Plays an important role in cellular responses to hypoxia and is important for cell proliferation under hypoxia. Protects cells against apoptosis in response to hypoxia and oxidative stress.^[1] ^[2] ^[3] ^[4]

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

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^[5]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Gudi R, Bowker-Kinley MM, Kedishvili NY, Zhao Y, Popov KM. Diversity of the pyruvate dehydrogenase kinase gene family in humans. J Biol Chem. 1995 Dec 1;270(48):28989-94. PMID:7499431
↑ McFate T, Mohyeldin A, Lu H, Thakar J, Henriques J, Halim ND, Wu H, Schell MJ, Tsang TM, Teahan O, Zhou S, Califano JA, Jeoung NH, Harris RA, Verma A. Pyruvate dehydrogenase complex activity controls metabolic and malignant phenotype in cancer cells. J Biol Chem. 2008 Aug 15;283(33):22700-8. doi: 10.1074/jbc.M801765200. Epub 2008 , Jun 9. PMID:18541534 doi:http://dx.doi.org/10.1074/jbc.M801765200
↑ Hitosugi T, Fan J, Chung TW, Lythgoe K, Wang X, Xie J, Ge Q, Gu TL, Polakiewicz RD, Roesel JL, Chen GZ, Boggon TJ, Lonial S, Fu H, Khuri FR, Kang S, Chen J. Tyrosine phosphorylation of mitochondrial pyruvate dehydrogenase kinase 1 is important for cancer metabolism. Mol Cell. 2011 Dec 23;44(6):864-77. doi: 10.1016/j.molcel.2011.10.015. PMID:22195962 doi:http://dx.doi.org/10.1016/j.molcel.2011.10.015
↑ Kato M, Li J, Chuang JL, Chuang DT. Distinct structural mechanisms for inhibition of pyruvate dehydrogenase kinase isoforms by AZD7545, dichloroacetate, and radicicol. Structure. 2007 Aug;15(8):992-1004. Epub 2007 Aug 2. PMID:17683942 doi:10.1016/j.str.2007.07.001
↑ Kato M, Li J, Chuang JL, Chuang DT. Distinct structural mechanisms for inhibition of pyruvate dehydrogenase kinase isoforms by AZD7545, dichloroacetate, and radicicol. Structure. 2007 Aug;15(8):992-1004. Epub 2007 Aug 2. PMID:17683942 doi:10.1016/j.str.2007.07.001

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 See Also
6 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/2q8h"

@@ Line 1: / Line 1: @@
 ==Structure of pyruvate dehydrogenase kinase isoform 1 in complex with dichloroacetate (DCA)==
 <StructureSection load='2q8h' size='340' side='right' caption='[[2q8h]], [[Resolution|resolution]] 2.00&Aring;' scene=''>
@@ Line 7: / Line 8: @@
 <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">PDK1 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</td></tr>
 <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/[Pyruvate_dehydrogenase_(acetyl-transferring)]_kinase [Pyruvate dehydrogenase (acetyl-transferring)] kinase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.11.2 2.7.11.2] </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=2q8h FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2q8h OCA], [http://pdbe.org/2q8h PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2q8h RCSB], [http://www.ebi.ac.uk/pdbsum/2q8h PDBsum]</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=2q8h FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2q8h OCA], [http://pdbe.org/2q8h PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2q8h RCSB], [http://www.ebi.ac.uk/pdbsum/2q8h PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=2q8h ProSAT]</span></td></tr>
 </table>
 == Function ==

2q8h

From Proteopedia

Revision as of 09:41, 18 October 2017

Structure of pyruvate dehydrogenase kinase isoform 1 in complex with dichloroacetate (DCA)

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

Personal tools

Navigation

Search

Toolbox