2BU8

crystal structures of human pyruvate dehydrogenase kinase 2 containing physiological and synthetic ligands


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.233 

wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

Regulatory Roles of the N-Terminal Domain Based on Crystal Structures of Human Pyruvate Dehydrogenase Kinase 2 Containing Physiological and Synthetic Ligands.

Knoechel, T.R.Tucker, A.D.Robinson, C.M.Phillips, C.Taylor, W.Bungay, P.J.Kasten, S.A.Roche, T.E.Brown, D.G.

(2006) Biochemistry 45: 402

  • DOI: 10.1021/bi051402s
  • Primary Citation of Related Structures:  
    2BTZ, 2BU8, 2BU7, 2BU6, 2BU5, 2BU2

  • PubMed Abstract: 
  • Pyruvate dehydrogenase kinase (PDHK) regulates the activity of the pyruvate dehydrogenase multienzyme complex. PDHK inhibition provides a route for therapeutic intervention in diabetes and cardiovascular disorders. We report crystal structures of human P ...

    Pyruvate dehydrogenase kinase (PDHK) regulates the activity of the pyruvate dehydrogenase multienzyme complex. PDHK inhibition provides a route for therapeutic intervention in diabetes and cardiovascular disorders. We report crystal structures of human PDHK isozyme 2 complexed with physiological and synthetic ligands. Several of the PDHK2 structures disclosed have C-terminal cross arms that span a large trough region between the N-terminal regulatory (R) domains of the PDHK2 dimers. The structures containing bound ATP and ADP demonstrate variation in the conformation of the active site lid, residues 316-321, which enclose the nucleotide beta and gamma phosphates at the active site in the C-terminal catalytic domain. We have identified three novel ligand binding sites located in the R domain of PDHK2. Dichloroacetate (DCA) binds at the pyruvate binding site in the center of the R domain, which together with ADP, induces significant changes at the active site. Nov3r and AZ12 inhibitors bind at the lipoamide binding site that is located at one end of the R domain. Pfz3 (an allosteric inhibitor) binds in an extended site at the other end of the R domain. We conclude that the N-terminal domain of PDHK has a key regulatory function and propose that the different inhibitor classes act by discrete mechanisms. The structures we describe provide insights that can be used for structure-based design of PDHK inhibitors.


    Organizational Affiliation

    PGRD Sandwich, Pfizer Ltd, Sandwich, Kent CT139NJ, United Kingdom.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
PYRUVATE DEHYDROGENASE KINASE ISOENZYME 2 A394Homo sapiensMutation(s): 0 
Gene Names: PDK2PDHK2
EC: 2.7.1.99 (PDB Primary Data), 2.7.11.2 (UniProt)
Find proteins for Q15119 (Homo sapiens)
Explore Q15119 
Go to UniProtKB:  Q15119
NIH Common Fund Data Resources
PHAROS:  Q15119
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ADP
Query on ADP

Download Ideal Coordinates CCD File 
A
ADENOSINE-5'-DIPHOSPHATE
C10 H15 N5 O10 P2
XTWYTFMLZFPYCI-KQYNXXCUSA-N
 Ligand Interaction
TF4
Query on TF4

Download Ideal Coordinates CCD File 
A
DICHLORO-ACETIC ACID
C2 H2 Cl2 O2
JXTHNDFMNIQAHM-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

Download Ideal Coordinates CCD File 
A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
TF4IC50:  183000   nM  BindingDB
TF4IC50:  2000000   nM  BindingDB
TF4IC50:  504000   nM  BindingDB
TF4IC50:  9000000   nM  BindingDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.233 
  • Space Group: P 64
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 110.699α = 90
b = 110.699β = 90
c = 84.609γ = 120
Software Package:
Software NamePurpose
CNXrefinement
HKLdata reduction
SCALEPACKdata scaling
CNXphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-02-02
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2019-03-27
    Changes: Data collection, Other, Source and taxonomy
  • Version 1.4: 2019-05-15
    Changes: Data collection, Experimental preparation