X-ray structure of the complex between hen egg white lysozyme and pentachlorocarbonyliridate(III) (5 days)

Experimental Data Snapshot

  • Resolution: 1.92 Å
  • R-Value Free: 0.260 
  • R-Value Work: 0.198 
  • R-Value Observed: 0.220 

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Interaction between proteins and Ir based CO releasing molecules: mechanism of adduct formation and CO release.

Petruk, A.A.Vergara, A.Marasco, D.Bikiel, D.Doctorovich, F.Estrin, D.A.Merlino, A.

(2014) Inorg Chem 53: 10456-10462

  • DOI: https://doi.org/10.1021/ic501498g
  • Primary Citation of Related Structures:  
    4N9R, 4NHP, 4NHQ, 4NHS, 4NHT, 4NIJ

  • PubMed Abstract: 

    Carbon monoxide releasing molecules (CORMs) have important bactericidal, anti-inflammatory, neuroprotective, and antiapoptotic effects and can be used as tools for CO physiology experiments, including studies on vasodilation. In this context, a new class of CO releasing molecules, based on pentachlorocarbonyliridate(III) derivative have been recently reported. Although there is a growing interest in the characterization of protein-CORMs interactions, only limited structural information on CORM binding to protein and CO release has been available to date. Here, we report six different crystal structures describing events ranging from CORM entrance into the protein crystal up to the CO release and a biophysical characterization by isothermal titration calorimetry, Raman microspectroscopy, and molecular dynamics simulations of the complex between a pentachlorocarbonyliridate(III) derivative and hen egg white lysozyme, a model protein. Altogether, the data indicate the formation of a complex in which the ligand can bind to different sites of the protein surface and provide clues on the mechanism of adduct formation and CO release.

  • Organizational Affiliation

    Departamento de Química Inorgánica, Analítica y Química Física/INQUIMAE-CONICET, University of Buenos Aires , Ciudad Universitaria, Pab. 2, C1428EHA Buenos Aires, Argentina.

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: 1.92 Å
  • R-Value Free: 0.260 
  • R-Value Work: 0.198 
  • R-Value Observed: 0.220 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 80.19α = 90
b = 80.19β = 90
c = 36.677γ = 90
Software Package:
Software NamePurpose
CrystalCleardata collection
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-09-17
    Type: Initial release
  • Version 1.1: 2015-06-24
    Changes: Database references