3SCF

Fe(II)-HppE with S-HPP and NO


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.85 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.243 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural basis of regiospecificity of a mononuclear iron enzyme in antibiotic fosfomycin biosynthesis.

Yun, D.Dey, M.Higgins, L.J.Yan, F.Liu, H.W.Drennan, C.L.

(2011) J.Am.Chem.Soc. 133: 11262-11269

  • DOI: 10.1021/ja2025728
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Hydroxypropylphosphonic acid epoxidase (HppE) is an unusual mononuclear iron enzyme that uses dioxygen to catalyze the oxidative epoxidation of (S)-2-hydroxypropylphosphonic acid (S-HPP) in the biosynthesis of the antibiotic fosfomycin. Additionally, ...

    Hydroxypropylphosphonic acid epoxidase (HppE) is an unusual mononuclear iron enzyme that uses dioxygen to catalyze the oxidative epoxidation of (S)-2-hydroxypropylphosphonic acid (S-HPP) in the biosynthesis of the antibiotic fosfomycin. Additionally, the enzyme converts the R-enantiomer of the substrate (R-HPP) to 2-oxo-propylphosphonic acid. To probe the mechanism of HppE regiospecificity, we determined three X-ray structures: R-HPP with inert cobalt-containing enzyme (Co(II)-HppE) at 2.1 Å resolution; R-HPP with active iron-containing enzyme (Fe(II)-HppE) at 3.0 Å resolution; and S-HPP-Fe(II)-HppE in complex with dioxygen mimic NO at 2.9 Å resolution. These structures, along with previously determined structures of S-HPP-HppE, identify the dioxygen binding site on iron and elegantly illustrate how HppE is able to recognize both substrate enantiomers to catalyze two completely distinct reactions.


    Organizational Affiliation

    Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Epoxidase
A, B, C
198Streptomyces wedmorensisMutation(s): 0 
Gene Names: hppE (fom4)
EC: 1.11.1.23
Find proteins for Q56185 (Streptomyces wedmorensis)
Go to UniProtKB:  Q56185
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL

Download SDF File 
Download CCD File 
A, C
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
S0H
Query on S0H

Download SDF File 
Download CCD File 
A, B, C
(S)-2-HYDROXYPROPYLPHOSPHONIC ACID
C3 H9 O4 P
ZFVCONUOLQASEW-VKHMYHEASA-N
 Ligand Interaction
FE2
Query on FE2

Download SDF File 
Download CCD File 
A, B, C
FE (II) ION
Fe
CWYNVVGOOAEACU-UHFFFAOYSA-N
 Ligand Interaction
NO
Query on NO

Download SDF File 
Download CCD File 
A, B
NITRIC OXIDE
Nitrogen monoxide
N O
ODUCDPQEXGNKDN-UHFFFAOYAM
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.85 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.243 
  • Space Group: P 42 21 2
Unit Cell:
Length (Å)Angle (°)
a = 111.661α = 90.00
b = 111.661β = 90.00
c = 152.158γ = 90.00
Software Package:
Software NamePurpose
ADSCdata collection
SCALEPACKdata scaling
CNSphasing
CNSrefinement
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2011-06-07 
  • Released Date: 2011-07-06 
  • Deposition Author(s): Drennan, C.L.

Revision History 

  • Version 1.0: 2011-07-06
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2011-08-10
    Type: Database references