3D structure of the reduced form of CotA

Experimental Data Snapshot

  • Resolution: 2.50 Å
  • R-Value Free: 0.213 
  • R-Value Work: 0.173 
  • R-Value Observed: 0.175 

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This is version 1.3 of the entry. See complete history


Dioxygen Reduction by Multi-Copper Oxidases; a Structural Perspective.

Bento, I.Martins, L.O.Lopes, G.G.Carrondo, M.A.Lindley, P.F.

(2005) Dalton Trans 7: 3507

  • DOI: https://doi.org/10.1039/b504806k
  • Primary Citation of Related Structures:  
    1W6L, 1W6W, 1W8E, 2BHF

  • PubMed Abstract: 

    The multi-copper oxidases oxidise substrate molecules by accepting electrons at a mononuclear copper centre and transferring them to a trinuclear centre. Dioxygen binds to the trinuclear centre and, following the transfer of four electrons, is reduced to two molecules of water. The precise mechanism of this reduction has been unclear, but recent X-ray structural studies using the CotA endospore coat protein from Bacillus subtilis have given further insights into the principal stages. It is proposed that the mechanism involves binding of the dioxygen into the trinuclear centre so that it is sited approximately symmetrically between the two type 3 copper ions with one oxygen atom close to the type 2 copper ion. Further stages involve the formation of a peroxide intermediate and following the splitting of this intermediate, the migration of the hydroxide moieties towards the solvent exit channel. The migration steps are likely to involve a movement of the type 2 copper ion and its environment. Details of a putative mechanism are described herein based both on structures already reported in the literature and on structures of the CotA protein in the oxidised and reduced states and with the addition of peroxide and the inhibitor, azide.

  • Organizational Affiliation

    Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa Apartado 127, Av. República, 2781-901, Oeiras, Portugal. bento@itqb.unl.pt

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
SPORE COAT PROTEIN A513Bacillus subtilisMutation(s): 0 
Find proteins for P07788 (Bacillus subtilis (strain 168))
Explore P07788 
Go to UniProtKB:  P07788
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP07788
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.50 Å
  • R-Value Free: 0.213 
  • R-Value Work: 0.173 
  • R-Value Observed: 0.175 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 102.101α = 90
b = 102.101β = 90
c = 136.257γ = 120
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2005-10-26
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2023-12-13
    Changes: Data collection, Database references, Derived calculations, Other, Refinement description