1IPS

ISOPENICILLIN N SYNTHASE FROM ASPERGILLUS NIDULANS (MANGANESE COMPLEX)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.265 
  • R-Value Work: 0.220 
  • R-Value Observed: 0.220 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Crystal structure of isopenicillin N synthase is the first from a new structural family of enzymes.

Roach, P.L.Clifton, I.J.Fulop, V.Harlos, K.Barton, G.J.Hajdu, J.Andersson, I.Schofield, C.J.Baldwin, J.E.

(1995) Nature 375: 700-704

  • DOI: 10.1038/375700a0
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Penicillin antibiotics are all produced from fermentation-derived penicillins because their chemical synthesis is not commercially viable. The key step in penicillin biosynthesis, in which both the beta-lactam and thiazolidine rings of the nucleus ar ...

    Penicillin antibiotics are all produced from fermentation-derived penicillins because their chemical synthesis is not commercially viable. The key step in penicillin biosynthesis, in which both the beta-lactam and thiazolidine rings of the nucleus are created, is mediated by isopenicillin N synthase (IPNS), which binds ferrous iron and uses dioxygen as a cosubstrate. In a unique enzymatic step, with no chemical precedent, IPNS catalyses the transfer of four hydrogen atoms from its tripeptide substrate to dioxygen forming, in a single reaction, the complete bicyclic nucleus of the penicillins. We now report the structure of IPNS complexed with manganese, which reveals the active site is unusually buried within a 'jelly-roll' motif and lined by hydrophobic residues, and suggest how this structure permits the process of penicillin formation. Sequence analyses indicate IPNS, 1-aminocyclopropane-1-carboxylic acid oxidase and many of the 2-oxo-acid-dependent oxygenases contain a conserved jelly-roll motif, forming a new structural family of enzymes.


    Related Citations: 
    • Crystallization and Preliminary X-Ray Diffraction Studies on Recombinant Isopenicillin N Synthase from Aspergillus Nidulans
      Roach, P.L., Schofield, C.J., Baldwin, J.E., Clifton, I.J., Hajdu, J.
      (1995) Protein Sci 4: 1007

    Organizational Affiliation

    Dyson Perrins Laboratory, University of Oxford, UK.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ISOPENICILLIN N SYNTHASEA, B331Aspergillus nidulansMutation(s): 0 
Gene Names: PCB C
EC: 1.21.3.1
Find proteins for P05326 (Emericella nidulans (strain FGSC A4 / ATCC 38163 / CBS 112.46 / NRRL 194 / M139))
Explore P05326 
Go to UniProtKB:  P05326
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MN
Query on MN

Download CCD File 
A, B
MANGANESE (II) ION
Mn
WAEMQWOKJMHJLA-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.265 
  • R-Value Work: 0.220 
  • R-Value Observed: 0.220 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 59.2α = 90
b = 127β = 90
c = 139.6γ = 90
Software Package:
Software NamePurpose
DMmodel building
MLPHAREphasing
X-PLORrefinement
DENZOdata reduction
SCALEPACKdata scaling
DMphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1998-03-25
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance