4M2E

Crystal structure of non-heme iron oxygenase OrfP in complex with Fe and L-homoarginine


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.06 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.223 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Biosynthesis of streptolidine involved two unexpected intermediates produced by a dihydroxylase and a cyclase through unusual mechanisms.

Chang, C.Y.Lyu, S.Y.Liu, Y.C.Hsu, N.S.Wu, C.C.Tang, C.F.Lin, K.H.Ho, J.Y.Wu, C.J.Tsai, M.D.Li, T.L.

(2014) Angew.Chem.Int.Ed.Engl. 53: 1943-1948

  • DOI: 10.1002/anie.201307989
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Streptothricin-F (STT-F), one of the early-discovered antibiotics, consists of three components, a β-lysine homopolymer, an aminosugar D-gulosamine, and an unusual bicyclic streptolidine. The biosynthesis of streptolidine is a long-lasting but unreso ...

    Streptothricin-F (STT-F), one of the early-discovered antibiotics, consists of three components, a β-lysine homopolymer, an aminosugar D-gulosamine, and an unusual bicyclic streptolidine. The biosynthesis of streptolidine is a long-lasting but unresolved puzzle. Herein, a combination of genetic/biochemical/structural approaches was used to unravel this problem. The STT gene cluster was first sequenced from a Streptomyces variant BCRC 12163, wherein two gene products OrfP and OrfR were characterized in vitro to be a dihydroxylase and a cyclase, respectively. Thirteen high-resolution crystal structures for both enzymes in different reaction intermediate states were snapshotted to help elucidate their catalytic mechanisms. OrfP catalyzes an Fe(II) -dependent double hydroxylation reaction converting L-Arg into (3R,4R)-(OH)2 -L-Arg via (3S)-OH-L-Arg, while OrfR catalyzes an unusual PLP-dependent elimination/addition reaction cyclizing (3R,4R)-(OH)2 -L-Arg to the six-membered (4R)-OH-capreomycidine. The biosynthetic mystery finally comes to light as the latter product was incorporation into STT-F by a feeding experiment.


    Organizational Affiliation

    Genomics Research Center, Academia Sinica, 128 Academia Road, Section 2, Nankang, Taipei 115 (Taiwan).




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
L-arginine beta-hydroxylase
A, B, C, D
364Streptomyces lavendulae subsp. lavendulaeMutation(s): 0 
Gene Names: vioC
EC: 1.14.11.41
Find proteins for G9MBV2 (Streptomyces lavendulae subsp. lavendulae)
Go to UniProtKB:  G9MBV2
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FE
Query on FE

Download SDF File 
Download CCD File 
B, C, D
FE (III) ION
Fe
VTLYFUHAOXGGBS-UHFFFAOYSA-N
 Ligand Interaction
HRG
Query on HRG

Download SDF File 
Download CCD File 
A, C, D
L-HOMOARGININE
C7 H16 N4 O2
QUOGESRFPZDMMT-YFKPBYRVSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.06 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.223 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 68.322α = 90.00
b = 117.162β = 91.62
c = 96.038γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data collection
REFMACrefinement
HKL-2000data scaling
HKL-2000data reduction
MOLREPphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-06-25
    Type: Initial release
  • Version 1.1: 2018-07-18
    Type: Data collection