2F60

Crystal Structure of the Dihydrolipoamide Dehydrogenase (E3)-Binding Domain of Human E3-Binding Protein


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.55 Å
  • R-Value Free: 0.223 
  • R-Value Work: 0.206 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural Insight into Interactions between Dihydrolipoamide Dehydrogenase (E3) and E3 Binding Protein of Human Pyruvate Dehydrogenase Complex.

Brautigam, C.A.Wynn, R.M.Chuang, J.L.Machius, M.Tomchick, D.R.Chuang, D.T.

(2006) Structure 14: 611-621

  • DOI: 10.1016/j.str.2006.01.001
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The 9.5 MDa human pyruvate dehydrogenase complex (PDC) utilizes the specific dihydrolipoamide dehydrogenase (E3) binding protein (E3BP) to tether the essential E3 component to the 60-meric core of the complex. Here, we report crystal structures of th ...

    The 9.5 MDa human pyruvate dehydrogenase complex (PDC) utilizes the specific dihydrolipoamide dehydrogenase (E3) binding protein (E3BP) to tether the essential E3 component to the 60-meric core of the complex. Here, we report crystal structures of the binding domain (E3BD) of human E3BP alone and in complex with human E3 at 1.6 angstroms and 2.2 angstroms, respectively. The latter structure shows that residues from E3BD contact E3 across its 2-fold axis, resulting in one E3BD binding site on the E3 homodimer. Negligible conformational changes occur in E3BD upon its high-affinity binding to E3. Modifications of E3BD residues at the center of the E3BD/E3 interface impede E3 binding far more severely than those of residues on the periphery, validating the "hot spot" paradigm for protein interactions. A cluster of disease-causing E3 mutations located near the center of the E3BD/E3 interface prevents the efficient recruitment of these E3 variants by E3BP into the PDC, leading to the dysfunction of the PDC catalytic machine.


    Organizational Affiliation

    Department of Biochemistry, The University of Texas Southwestern Medical Center at Dallas, Dallas, Texas 75390, USA. chad.brautigam@utsouthwestern.edu




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Pyruvate dehydrogenase protein X component
K
64Homo sapiensMutation(s): 2 
Gene Names: PDHX (PDX1)
Find proteins for O00330 (Homo sapiens)
Go to Gene View: PDHX
Go to UniProtKB:  O00330
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL

Download SDF File 
Download CCD File 
K
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.55 Å
  • R-Value Free: 0.223 
  • R-Value Work: 0.206 
  • Space Group: P 65 2 2
Unit Cell:
Length (Å)Angle (°)
a = 36.845α = 90.00
b = 36.845β = 90.00
c = 191.542γ = 120.00
Software Package:
Software NamePurpose
PHASERphasing
HKL-2000data collection
CNSrefinement
HKL-2000data reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-01-17
    Type: Initial release
  • Version 1.1: 2008-05-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Non-polymer description, Version format compliance