1PRH

THE X-RAY CRYSTAL STRUCTURE OF THE MEMBRANE PROTEIN PROSTAGLANDIN H2 SYNTHASE-1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.5 Å
  • R-Value Free: 0.316 
  • R-Value Work: 0.267 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The X-ray crystal structure of the membrane protein prostaglandin H2 synthase-1.

Picot, D.Loll, P.J.Garavito, R.M.

(1994) Nature 367: 243-249

  • DOI: 10.1038/367243a0
  • Primary Citation of Related Structures:  1CQE

  • PubMed Abstract: 
  • The three-dimensional structure of prostaglandin H2 synthase-1, an integral membrane protein, has been determined at 3.5 A resolution by X-ray crystallography. This bifunctional enzyme comprises three independent folding units: an epidermal growth fa ...

    The three-dimensional structure of prostaglandin H2 synthase-1, an integral membrane protein, has been determined at 3.5 A resolution by X-ray crystallography. This bifunctional enzyme comprises three independent folding units: an epidermal growth factor domain, a membrane-binding motif and an enzymatic domain. Two adjacent but spatially distinct active sites were found for its haem-dependent peroxidase and cyclooxygenase activities. The cyclooxygenase active site is created by a long, hydrophobic channel that is the site of non-steroidal anti-inflammatory drug binding. The conformation of the membrane-binding motif strongly suggests that the enzyme integrates into only one leaflet of the lipid bilayer and is thus a monotopic membrane protein.


    Related Citations: 
    • X-Ray Crystal Structure of Canine Myeloperoxidase at 3 Angstroms Resolution
      Zeng, J.,Fenna, R.E.
      (1992) J.Mol.Biol. 226: 185


    Organizational Affiliation

    Department of Biochemistry and Molecular Biology, University of Chicago, Illinois 60637.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PROSTAGLANDIN H2 SYNTHASE-1
A, B
554Ovis ariesGene Names: PTGS1 (COX1)
EC: 1.14.99.1
Membrane protein
mpstruct
Group: 
MONOTOPIC MEMBRANE PROTEINS
Sub Group: 
Cyclooxygenases
Protein: 
Ram Prostaglandin H2 synthase-1 (cyclooxygenase-1 or COX-1)
Find proteins for P05979 (Ovis aries)
Go to Gene View: PTGS1
Go to UniProtKB:  P05979
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
HEM
Query on HEM

Download SDF File 
Download CCD File 
A, B
PROTOPORPHYRIN IX CONTAINING FE
HEME
C34 H32 Fe N4 O4
KABFMIBPWCXCRK-RGGAHWMASA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.5 Å
  • R-Value Free: 0.316 
  • R-Value Work: 0.267 
  • Space Group: I 2 2 2
Unit Cell:
Length (Å)Angle (°)
a = 99.400α = 90.00
b = 210.300β = 90.00
c = 233.100γ = 90.00
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
X-PLORphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1995-03-31
    Type: Initial release
  • Version 1.1: 2008-03-03
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance