3DWW

Electron crystallographic structure of human microsomal prostaglandin E synthase 1


Experimental Data Snapshot

  • Method: ELECTRON CRYSTALLOGRAPHY

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structural basis for induced formation of the inflammatory mediator prostaglandin E2

Jegerschold, C.Pawelzik, S.C.Purhonen, P.Bhakat, P.Gheorghe, K.R.Gyobu, N.Mitsuoka, K.Morgenstern, R.Jakobsson, P.J.Hebert, H.

(2008) Proc Natl Acad Sci U S A 105: 11110-11115

  • DOI: 10.1073/pnas.0802894105
  • Primary Citation of Related Structures:  
    3DWW

  • PubMed Abstract: 
  • Prostaglandins (PG) are bioactive lipids produced from arachidonic acid via the action of cyclooxygenases and terminal PG synthases. Microsomal prostaglandin E synthase 1 (MPGES1) constitutes an inducible glutathione-dependent integral membrane protein that catalyzes the oxidoreduction of cyclooxygenase derived PGH(2) into PGE(2) ...

    Prostaglandins (PG) are bioactive lipids produced from arachidonic acid via the action of cyclooxygenases and terminal PG synthases. Microsomal prostaglandin E synthase 1 (MPGES1) constitutes an inducible glutathione-dependent integral membrane protein that catalyzes the oxidoreduction of cyclooxygenase derived PGH(2) into PGE(2). MPGES1 has been implicated in a number of human diseases or pathological conditions, such as rheumatoid arthritis, fever, and pain, and is therefore regarded as a primary target for development of novel antiinflammatory drugs. To provide a structural basis for insight in the catalytic mechanism, we determined the structure of MPGES1 in complex with glutathione by electron crystallography from 2D crystals induced in the presence of phospholipids. Together with results from site-directed mutagenesis and activity measurements, we can thereby demonstrate the role of specific amino acid residues. Glutathione is found to bind in a U-shaped conformation at the interface between subunits in the protein trimer. It is exposed to a site facing the lipid bilayer, which forms the specific environment for the oxidoreduction of PGH(2) to PGE(2) after displacement of the cytoplasmic half of the N-terminal transmembrane helix. Hence, insight into the dynamic behavior of MPGES1 and homologous membrane proteins in inflammation and detoxification is provided.


    Organizational Affiliation

    Department of Biosciences and Nutrition, Karolinska Institutet and School of Technology and Health, Royal Institute of Technology, Novum, S-141 57 Huddinge, Sweden. caroline.jegerschold@ki.se



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Prostaglandin E synthase ABC158Homo sapiensMutation(s): 0 
Gene Names: PTGESMGST1L1MPGES1PGESPIG12
EC: 5.3.99.3 (PDB Primary Data), 1.11.1 (UniProt), 2.5.1.18 (UniProt)
Find proteins for O14684 (Homo sapiens)
Explore O14684 
Go to UniProtKB:  O14684
NIH Common Fund Data Resources
PHAROS:  O14684
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GSH
Query on GSH

Download Ideal Coordinates CCD File 
A, B, C
GLUTATHIONE
C10 H17 N3 O6 S
RWSXRVCMGQZWBV-WDSKDSINSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON CRYSTALLOGRAPHY
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 93.2α = 90
b = 84.6β = 90
c = 100γ = 90

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-07-28
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2012-03-21
    Changes: Non-polymer description