1OC1

ISOPENICILLIN N SYNTHASE aminoadipoyl-cysteinyl-aminobutyrate-FE COMPLEX


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.197 
  • R-Value Work: 0.173 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural Studies on the Reaction of Isopenicillin N Synthase with the Substrate Analogue Delta-(L-Alpha-Aminoadipoyl)-L-Cysteinyl-D-Alpha-Aminobutyrate

Long, A.J.Clifton, I.J.Roach, P.L.Baldwin, J.E.Schofield, C.J.Rutledge, P.J.

(2003) Biochem.J. 372: 687

  • DOI: 10.1042/BJ20021627
  • Primary Citation of Related Structures:  1OBN

  • PubMed Abstract: 
  • Isopenicillin N synthase (IPNS) is a non-haem iron(II) oxidase which catalyses the biosynthesis of isopenicillin N from the tripeptide delta-(L-alpha-aminoadipoyl)-L-cysteinyl-D-valine (ACV). Herein we report crystallographic studies to investigate t ...

    Isopenicillin N synthase (IPNS) is a non-haem iron(II) oxidase which catalyses the biosynthesis of isopenicillin N from the tripeptide delta-(L-alpha-aminoadipoyl)-L-cysteinyl-D-valine (ACV). Herein we report crystallographic studies to investigate the reaction of IPNS with the truncated substrate analogue delta-(L-alpha-aminoadipoyl)-L-cysteinyl-D-alpha-aminobutyrate (ACAb). It has been reported previously that this analogue gives rise to three beta-lactam products when incubated with IPNS: two methyl penams and a cepham. Crystal structures of the IPNS-Fe(II)-ACAb and IPNS-Fe(II)-ACAb-NO complexes have now been solved and are reported herein. These structures and modelling studies based on them shed light on the diminished product selectivity shown by IPNS in its reaction with ACAb and further rationalize the presence of certain key residues at the IPNS active site.


    Related Citations: 
    • Structure of Isopenicillin N Synthase Complexed with Substrate and the Mechanism of Penicillin Formation
      Roach, P.L.,Clifton, I.J.,Hensgens, C.M.,Shibata, N.,Schofield, C.J.,Hajdu, J.,Baldwin, J.E.
      (1997) Nature 387: 827


    Organizational Affiliation

    The Dyson Perrins Laboratory and the Oxford Centre for Molecular Sciences, University of Oxford, South Parks Road, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ISOPENICILLIN N SYNTHETASE
A
331Emericella nidulans (strain FGSC A4 / ATCC 38163 / CBS 112.46 / NRRL 194 / M139)Gene Names: ipnA (ips)
EC: 1.21.3.1
Find proteins for P05326 (Emericella nidulans (strain FGSC A4 / ATCC 38163 / CBS 112.46 / NRRL 194 / M139))
Go to UniProtKB:  P05326
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ASV
Query on ASV

Download SDF File 
Download CCD File 
A
DELTA-(L-ALPHA-AMINOADIPOYL)-L-CYSTEINYL-D-VINYLGLYCINE
C13 H21 N3 O6 S
JJJCGQKXGIRXKN-YIZRAAEISA-N
 Ligand Interaction
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
FE2
Query on FE2

Download SDF File 
Download CCD File 
A
FE (II) ION
Fe
CWYNVVGOOAEACU-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.197 
  • R-Value Work: 0.173 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 100.976α = 90.00
b = 100.976β = 90.00
c = 115.658γ = 120.00
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-02-02
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Version format compliance
  • Version 1.2: 2017-07-05
    Type: Refinement description