4H1P

Use of Europium for SAD Phasing at the Cu K alpha wavelength


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.231 
  • R-Value Work: 0.174 

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This is version 1.2 of the entry. See complete history

Literature

Use of europium ions for SAD phasing of Lysozyme at the Cu Kalpha wavelength

Vijayakumar, B.Velmurugan, D.

(2013) Acta Crystallogr.,Sect.F 69: 20-24

  • DOI: 10.1107/S1744309112047562

  • PubMed Abstract: 
  • Europium is shown to be a good anomalous scatterer in SAD phasing for solving the structure of biological macromolecules. The large value of the anomalous contribution of europium, f'' = 11.17 e(-), at the Cu Kα wavelength is an advantage in de novo ...

    Europium is shown to be a good anomalous scatterer in SAD phasing for solving the structure of biological macromolecules. The large value of the anomalous contribution of europium, f'' = 11.17 e(-), at the Cu Kα wavelength is an advantage in de novo phasing and automated model building. Tetragonal crystals of hen egg-white lysozyme (HEWL) incorporating europium(III) chloride (50 mM) were obtained which diffracted to a resolution of 2.3 Å at a wavelength of 1.54 Å (Cu Kα). The master data set (360° frames) was split and analyzed for anomalous signal-to-noise ratio, multiplicity, completeness, SAD phasing and automated building. The structure solution and model building of the split data sets were carried out using phenix.autosol and phenix.autobuild. The contributions of the Eu ions to SAD phasing using in-house data collection are discussed. This study revealed successful lysozyme phasing by SAD using laboratory-source data involving Eu ions, which are mainly coordinated by the side chains of Asn46, Asp52 and Asp101 together with some water molecules.


    Organizational Affiliation

    Centre of Advanced Study in Crystallography and Biophysics, University of Madras, Maraimalai Guindy Campus, Chennai 600 025, India.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Lysozyme C
A
129Gallus gallusGene Names: LYZ
EC: 3.2.1.17
Find proteins for P00698 (Gallus gallus)
Go to Gene View: LYZ
Go to UniProtKB:  P00698
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NA
Query on NA

Download SDF File 
Download CCD File 
A
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
CL
Query on CL

Download SDF File 
Download CCD File 
A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
EU
Query on EU

Download SDF File 
Download CCD File 
A
EUROPIUM ION
Eu
MGVUQZZTJGLWJV-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.231 
  • R-Value Work: 0.174 
  • Space Group: P 43 21 2
Unit Cell:
Length (Å)Angle (°)
a = 77.485α = 90.00
b = 77.485β = 90.00
c = 36.986γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
AUTOMARdata reduction
MAR345dtbdata collection
AutoSolphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-10-24
    Type: Initial release
  • Version 1.1: 2013-01-09
    Type: Database references
  • Version 1.2: 2013-04-24
    Type: Database references