Crystal structure of Hen Egg White Lysozyme in complex with I3C

  • Classification: HYDROLASE
  • Organism(s): Gallus gallus
  • Mutation(s): No 

  • Deposited: 2019-06-13 Released: 2019-07-10 
  • Deposition Author(s): Truong, J.Q.
  • Funding Organization(s): Australian Research Council (ARC)

Experimental Data Snapshot

  • Resolution: 1.89 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.197 
  • R-Value Observed: 0.201 

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Ligand Structure Quality Assessment 

This is version 1.3 of the entry. See complete history


Combining random microseed matrix screening and the magic triangle for the efficient structure solution of a potential lysin from bacteriophage P68.

Truong, J.Q.Panjikar, S.Shearwin-Whyatt, L.Bruning, J.B.Shearwin, K.E.

(2019) Acta Crystallogr D Struct Biol 75: 670-681

  • DOI: https://doi.org/10.1107/S2059798319009008
  • Primary Citation of Related Structures:  
    6O43, 6PBB

  • PubMed Abstract: 

    Two commonly encountered bottlenecks in the structure determination of a protein by X-ray crystallography are screening for conditions that give high-quality crystals and, in the case of novel structures, finding derivatization conditions for experimental phasing. In this study, the phasing molecule 5-amino-2,4,6-triiodoisophthalic acid (I3C) was added to a random microseed matrix screen to generate high-quality crystals derivatized with I3C in a single optimization experiment. I3C, often referred to as the magic triangle, contains an aromatic ring scaffold with three bound I atoms. This approach was applied to efficiently phase the structures of hen egg-white lysozyme and the N-terminal domain of the Orf11 protein from Staphylococcus phage P68 (Orf11 NTD) using SAD phasing. The structure of Orf11 NTD suggests that it may play a role as a virion-associated lysin or endolysin.

  • Organizational Affiliation

    School of Biological Sciences, The University of Adelaide, North Terrace, Adelaide, South Australia 5005, Australia.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Lysozyme129Gallus gallusMutation(s): 0 
Find proteins for P00698 (Gallus gallus)
Explore P00698 
Go to UniProtKB:  P00698
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP00698
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.89 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.197 
  • R-Value Observed: 0.201 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 77.16α = 90
b = 77.16β = 90
c = 38.201γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
Aimlessdata scaling

Structure Validation

View Full Validation Report

Ligand Structure Quality Assessment 

Entry History & Funding Information

Deposition Data

  • Released Date: 2019-07-10 
  • Deposition Author(s): Truong, J.Q.

Funding OrganizationLocationGrant Number
Australian Research Council (ARC)AustraliaDP150103009
Australian Research Council (ARC)AustraliaDP160101450

Revision History  (Full details and data files)

  • Version 1.0: 2019-07-10
    Type: Initial release
  • Version 1.1: 2019-07-17
    Changes: Data collection, Database references
  • Version 1.2: 2019-07-24
    Changes: Data collection, Database references
  • Version 1.3: 2020-01-01
    Changes: Author supporting evidence