X-ray structure of the adduct between hen egg white lysozyme and cis-diamminediiodoplatinum(II)

Experimental Data Snapshot

  • Resolution: 1.99 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.184 
  • R-Value Observed: 0.184 

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Peculiar features in the crystal structure of the adduct formed between cis-PtI2(NH3)2 and hen egg white lysozyme.

Messori, L.Marzo, T.Gabbiani, C.Valdes, A.A.Quiroga, A.G.Merlino, A.

(2013) Inorg Chem 52: 13827-13829

  • DOI: https://doi.org/10.1021/ic402611m
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The reactivity of cis-diamminediiodidoplatinum(II), cis-PtI2(NH3)2, the iodo analogue of cisplatin, with hen egg white lysozyme (HEWL) was investigated by electrospray ionization mass spectrometry and X-ray crystallography. Interestingly, the study compound forms a stable 1:1 protein adduct for which the crystal structure was solved at 1.99 Å resolution. In this adduct, the Pt(II) center, upon release of one ammonia ligand, selectively coordinates to the imidazole of His15. Both iodide ligands remain bound to platinum, with this being a highly peculiar and unexpected feature. Notably, two equivalent modes of Pt(II) binding are possible that differ only in the location of I atoms with respect to ND1 of His15. The structure of the adduct was compared with that of HEWL-cisplatin, previously described; differences are stressed and their important mechanistic implications discussed.

  • Organizational Affiliation

    Department of Chemistry, University of Florence , Via della Lastruccia 3, 50019 Sesto Fiorentino, Italy.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Lysozyme C129Gallus 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: 1.99 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.184 
  • R-Value Observed: 0.184 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 77.017α = 90
b = 77.017β = 90
c = 36.834γ = 90
Software Package:
Software NamePurpose
CrystalCleardata collection
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

  • Released Date: 2014-06-04 
  • Deposition Author(s): Merlino, A.

Revision History  (Full details and data files)

  • Version 1.0: 2014-06-04
    Type: Initial release