1RLZ

Deoxyhypusine synthase holoenzyme in its high ionic strength, low pH crystal form


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.15 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.199 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

A New Crystal Structure of Deoxyhypusine Synthase Reveals the Configuration of the Active Enzyme and of an Enzyme-NAD-Inhibitor Ternary Complex

Umland, T.C.Wolff, E.C.Park, M.-H.Davies, D.R.

(2004) J.Biol.Chem. 279: 28697-28705

  • DOI: 10.1074/jbc.M404095200
  • Primary Citation of Related Structures:  1ROZ, 1RQD

  • PubMed Abstract: 
  • Deoxyhypusine synthase catalyzes the first step in the two-step post-translational synthesis of hypusine, which is uniquely present in eukaryotic initiation factor 5A (eIF5A). Deoxyhypusine synthase and eIF5A are conserved throughout the eukaryotic k ...

    Deoxyhypusine synthase catalyzes the first step in the two-step post-translational synthesis of hypusine, which is uniquely present in eukaryotic initiation factor 5A (eIF5A). Deoxyhypusine synthase and eIF5A are conserved throughout the eukaryotic kingdom, and both are essential for cell proliferation and survival. A previous study (Liao, D. I., Wolff, E. C., Park, M. H., and Davies, D. R. (1998) Structure 6, 23-32) of human deoxyhypusine synthase revealed four active sites of the homotetrameric enzyme located within deep tunnels. These Form I crystals were obtained under conditions of acidic pH and high ionic strength and likely contain an inactive enzyme. Each active-site entrance is blocked by a ball-and-chain motif composed of a region of extended structure capped by a two-turn alpha-helix. We report here at 2.2 A a new Form II crystal of the deoxyhypusine synthase:NAD holoenzyme grown at low ionic strength and pH 8.0, near the optimal pH for enzymatic activity. The ball-and-chain motif could not be detected in the electron density, suggesting that it swings freely and thus it no longer obstructs the active-site entrance. The deoxyhypusine synthase competitive inhibitor N(1)-guanyl-1,7-diaminoheptane (GC(7))is observed bound within the putative active site of the enzyme in the new crystal form (Form II) after exposure to the inhibitor. This first structure of a deoxyhypusine synthase.NAD.inhibitor ternary complex under physiological conditions now provides a structural context to discuss the results of previous biochemical investigations of the deoxyhypusine synthase reaction mechanism. This structure also provides a basis for the development of improved inhibitors and antiproliferative agents.


    Related Citations: 
    • Crystal structure of the NAD complex of human deoxyhypusine synthase: an enzyme with a ball-and-chain mechanism for blocking the active site
      Liao, D.I.,Wolff, E.C.,Park, M.-H.,Davies, D.R.
      (1998) Structure 6: 23


    Organizational Affiliation

    Laboratory of Molecular Biology, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Deoxyhypusine synthase
A
369Homo sapiensGene Names: DHPS (DS)
EC: 2.5.1.46
Find proteins for P49366 (Homo sapiens)
Go to Gene View: DHPS
Go to UniProtKB:  P49366
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NAD
Query on NAD

Download SDF File 
Download CCD File 
A
NICOTINAMIDE-ADENINE-DINUCLEOTIDE
C21 H27 N7 O14 P2
BAWFJGJZGIEFAR-NNYOXOHSSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.15 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.199 
  • Space Group: P 4 21 2
Unit Cell:
Length (Å)Angle (°)
a = 108.600α = 90.00
b = 108.600β = 90.00
c = 69.830γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
CNSrefinement
CNSphasing
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-07-13
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance
  • Version 1.3: 2014-11-12
    Type: Structure summary