4BPM

Crystal structure of a human integral membrane enzyme


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.08 Å
  • R-Value Free: 0.218 
  • R-Value Work: 0.200 

wwPDB Validation 3D Report Full Report


This is version 1.4 of the entry. See complete history

Literature

Crystallizing Membrane Proteins in the Lipidic Mesophase. Experience with Human Prostaglandin E2 Synthase 1 and an Evolving Strategy.

Li, D.Howe, N.Dukkipati, A.Shah, S.T.A.Bax, B.D.Edge, C.Bridges, A.Hardwicke, P.Singh, O.M.P.Giblin, G.Pautsch, A.Pfau, R.Schnapp, G.Wang, M.Olieric, V.Caffrey, M.

(2014) Cryst.Growth Des. 14: 2034

  • DOI: 10.1021/cg500157x

  • PubMed Abstract: 
  • The lipidic mesophase or in meso method for crystallizing membrane proteins has several high profile targets to its credit and is growing in popularity. Despite its success, the method is in its infancy as far as rational crystallogenesis is concerne ...

    The lipidic mesophase or in meso method for crystallizing membrane proteins has several high profile targets to its credit and is growing in popularity. Despite its success, the method is in its infancy as far as rational crystallogenesis is concerned. Consequently, significant time, effort, and resources are still required to generate structure-grade crystals, especially with a new target type. Therefore, a need exists for crystallogenesis protocols that are effective with a broad range of membrane protein types. Recently, a strategy for crystallizing a prokaryotic α-helical membrane protein, diacylglycerol kinase (DgkA), by the in meso method was reported (Cryst. Growth. Des.2013, 14, 2846-2857). Here, we describe its application to the human α-helical microsomal prostaglandin E2 synthase 1 (mPGES1). While the DgkA strategy proved useful, significant modifications were needed to generate structure-quality crystals of this important therapeutic target. These included protein engineering, using an additive phospholipid in the hosting mesophase, performing multiple rounds of salt screening, and carrying out trials at 4 °C in the presence of a tight binding ligand. The crystallization strategy detailed here should prove useful for generating structures of other integral membrane proteins by the in meso method.


    Organizational Affiliation

    Membrane Structural and Functional Biology Group, School of Medicine and School of Biochemistry and Immunology, Trinity College Dublin, Dublin 2, Ireland.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PROSTAGLANDIN E SYNTHASE, FUSION PEPTIDE
A
178Homo sapiensMutation(s): 1 
Gene Names: PTGES (MGST1L1, MPGES1, PGES, PIG12), LTC4S
EC: 5.3.99.3 4.4.1.20
Find proteins for O14684 (Homo sapiens)
Go to Gene View: PTGES
Go to UniProtKB:  O14684
Find proteins for Q16873 (Homo sapiens)
Go to Gene View: LTC4S
Go to UniProtKB:  Q16873
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
LVJ
Query on LVJ

Download SDF File 
Download CCD File 
A
2-[[2,6-bis(chloranyl)-3-[(2,2-dimethylpropanoylamino)methyl]phenyl]amino]-1-methyl-6-(2-methyl-2-oxidanyl-propoxy)-N-[2,2,2-tris(fluoranyl)ethyl]benzimidazole-5-carboxamide
C27 H32 Cl2 F3 N5 O4
CHFOASGROVVRSK-UHFFFAOYSA-N
 Ligand Interaction
GSH
Query on GSH

Download SDF File 
Download CCD File 
A
GLUTATHIONE
C10 H17 N3 O6 S
RWSXRVCMGQZWBV-WDSKDSINSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
LVJKi: 2.4 nM BINDINGMOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.08 Å
  • R-Value Free: 0.218 
  • R-Value Work: 0.200 
  • Space Group: H 3 2
Unit Cell:
Length (Å)Angle (°)
a = 86.400α = 90.00
b = 86.400β = 90.00
c = 181.120γ = 120.00
Software Package:
Software NamePurpose
SHELXphasing
XDSdata reduction
XSCALEdata scaling
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-04-16
    Type: Initial release
  • Version 1.1: 2014-05-14
    Type: Database references
  • Version 1.2: 2017-03-15
    Type: Source and taxonomy
  • Version 1.3: 2019-03-06
    Type: Data collection, Experimental preparation
  • Version 1.4: 2019-04-03
    Type: Data collection, Experimental preparation