3SCG

Fe(II)-HppE with R-HPP

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.258 
  • R-Value Work: 0.217 
  • R-Value Observed: 0.217 

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:  
    3SCF, 3SCG, 3SCH

  • 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, the enzyme converts the R-enantiomer of the substrate (R-HPP) to 2-oxo-propylphosphonic acid ...

    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
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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Epoxidase A, B, C198Streptomyces wedmorensisMutation(s): 0 
Gene Names: fom4, hppE
EC: 1.11.1.23
Find proteins for Q56185 (Streptomyces wedmorensis)
Explore Q56185 
Go to UniProtKB:  Q56185
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.258 
  • R-Value Work: 0.217 
  • R-Value Observed: 0.217 
  • Space Group: P 42 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 111.57α = 90
b = 111.57β = 90
c = 151.334γ = 90
Software Package:
Software NamePurpose
ADSCdata collection
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
CNSphasing

Structure Validation

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Entry History 

Deposition Data

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

Revision History  (Full details and data files)

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