4AL1

Crystal structure of Human PS-1 GSH-analog complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.172 
  • R-Value Work: 0.172 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal Structure of Microsomal Prostaglandin E2 Synthase Provides Insight Into Diversity in the Mapeg Superfamily.

Sjogren, T.Nord, J.Ek, M.Johansson, P.Liu, G.Geschwindner, S.

(2013) Proc.Natl.Acad.Sci.USA 110: 3806

  • DOI: 10.1073/pnas.1218504110
  • Primary Citation of Related Structures:  4AL0

  • PubMed Abstract: 
  • Prostaglandin E2 (PGE2) is a key mediator in inflammatory response. The main source of inducible PGE2, microsomal PGE2 synthase-1 (mPGES-1), has emerged as an interesting drug target for treatment of pain. To support inhibitor design, we have determi ...

    Prostaglandin E2 (PGE2) is a key mediator in inflammatory response. The main source of inducible PGE2, microsomal PGE2 synthase-1 (mPGES-1), has emerged as an interesting drug target for treatment of pain. To support inhibitor design, we have determined the crystal structure of human mPGES-1 to 1.2 Å resolution. The structure reveals three well-defined active site cavities within the membrane-spanning region in each monomer interface of the trimeric structure. An important determinant of the active site cavity is a small cytosolic domain inserted between transmembrane helices I and II. This extra domain is not observed in other structures of proteins within the MAPEG (Membrane-Associated Proteins involved in Eicosanoid and Glutathione metabolism) superfamily but is likely to be present also in microsomal GST-1 based on sequence similarity. An unexpected feature of the structure is a 16-Å-deep cone-shaped cavity extending from the cytosolic side into the membrane-spanning region. We suggest a potential role for this cavity in substrate access. Based on the structure of the active site, we propose a catalytic mechanism in which serine 127 plays a key role. We have also determined the structure of mPGES-1 in complex with a glutathione-based analog, providing insight into mPGES-1 flexibility and potential for structure-based drug design.


    Organizational Affiliation

    Discovery Sciences, AstraZeneca R&D Mölndal, S-43183 Mölndal, Sweden. tove.sjogren@astrazeneca.com




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PROSTAGLANDIN E SYNTHASE
A
152Homo sapiensGene Names: PTGES (MGST1L1, MPGES1, PGES, PIG12)
EC: 5.3.99.3
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Membrane-Associated Proteins in Eicosanoid and Glutathione Metabolism (MAPEG)
Protein: 
Microsomal Prostaglandin E Synthase 1
Find proteins for O14684 (Homo sapiens)
Go to Gene View: PTGES
Go to UniProtKB:  O14684
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
48T
Query on 48T

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Download CCD File 
A
L-gamma-glutamyl-S-(2-biphenyl-4-yl-2-oxoethyl)-L-cysteinylglycine
C24 H27 N3 O7 S
JIZFTRGOFNRYSA-OALUTQOASA-N
 Ligand Interaction
PLM
Query on PLM

Download SDF File 
Download CCD File 
A
PALMITIC ACID
C16 H32 O2
IPCSVZSSVZVIGE-UHFFFAOYSA-N
 Ligand Interaction
BOG
Query on BOG

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Download CCD File 
A
B-OCTYLGLUCOSIDE
C14 H28 O6
HEGSGKPQLMEBJL-RKQHYHRCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.172 
  • R-Value Work: 0.172 
  • Space Group: H 3
Unit Cell:
Length (Å)Angle (°)
a = 76.623α = 90.00
b = 76.623β = 90.00
c = 123.349γ = 120.00
Software Package:
Software NamePurpose
REFMACrefinement
SCALAdata scaling
MOSFLMdata reduction
MOLREPphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-02-06
    Type: Initial release
  • Version 1.1: 2013-02-27
    Type: Database references
  • Version 1.2: 2013-04-03
    Type: Database references