The study of the X-ray induced enzymatic reduction of molecular oxygen to water for laccase from Steccherinum murashkinskyi.The 16-th structure of the series with total exposition time 453 min. The crystal was quick refreezing before this data collection.

Experimental Data Snapshot

  • Resolution: 1.35 Å
  • R-Value Free: 0.162 
  • R-Value Work: 0.141 
  • R-Value Observed: 0.142 

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Structural study of the X-ray-induced enzymatic reduction of molecular oxygen to water by Steccherinum murashkinskyi laccase: insights into the reaction mechanism.

Polyakov, K.M.Gavryushov, S.Ivanova, S.Fedorova, T.V.Glazunova, O.A.Popov, A.N.Koroleva, O.V.

(2017) Acta Crystallogr D Struct Biol 73: 388-401

  • DOI: https://doi.org/10.1107/S2059798317003667
  • Primary Citation of Related Structures:  
    5MEJ, 5MEW, 5MHU, 5MHV, 5MHW, 5MHX, 5MHY, 5MHZ, 5MI1, 5MI2, 5MIA, 5MIB, 5MIC, 5MID, 5MIE, 5MIG

  • PubMed Abstract: 

    The laccase from Steccherinum murashkinskyi is a member of the large family of multicopper oxidases that catalyze the oxidation of a wide range of organic and inorganic substrates, accompanied by the reduction of dioxygen to water. The reducing properties of X-ray radiation and the high quality of the laccase crystals allow the study of the catalytic reduction of dioxygen to water directly in a crystal. A series of diffraction data sets with increasing absorbed radiation dose were collected from a single crystal of Steccherinum murashkinskyi laccase at 1.35 Å resolution. Changes in the active-site structure associated with the reduction of molecular oxygen to water on increasing the absorbed dose of ionizing radiation were detected. The structures in the series are mixtures of different states of the enzyme-substrate complex. Nevertheless, it was possible to interpret these structures as complexes of various oxygen ligands with copper ions in different oxidation states. The results allowed the mechanism of oxygen reduction catalyzed by laccases to be refined.

  • Organizational Affiliation

    Department of Health and Society, Malmö University, Jan Waldenströms Gata 25, 205 06 Malmö, Sweden.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Laccase 2546Steccherinum murashkinskyiMutation(s): 0 
Find proteins for I1VE66 (Steccherinum murashkinskyi)
Explore I1VE66 
Go to UniProtKB:  I1VE66
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupI1VE66
Sequence Annotations
  • Reference Sequence


Entity ID: 2
MoleculeChains Length2D Diagram Glycosylation3D Interactions
B, C
Glycosylation Resources
GlyTouCan:  G42666HT
GlyCosmos:  G42666HT
GlyGen:  G42666HT
Experimental Data & Validation

Experimental Data

  • Resolution: 1.35 Å
  • R-Value Free: 0.162 
  • R-Value Work: 0.141 
  • R-Value Observed: 0.142 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 56.268α = 90
b = 84.415β = 90
c = 112.384γ = 90
Software Package:
Software NamePurpose
XSCALEdata reduction
XSCALEdata scaling

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
RFBRRussian Federation16-04-0052

Revision History  (Full details and data files)

  • Version 1.0: 2017-05-10
    Type: Initial release
  • Version 1.1: 2017-05-24
    Changes: Database references
  • Version 1.2: 2019-07-17
    Changes: Data collection
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Derived calculations, Structure summary