Crystal structure of CotA native enzyme in the acid condition, PH5.6

Experimental Data Snapshot

  • Resolution: 2.30 Å
  • R-Value Free: 0.187 
  • R-Value Work: 0.159 
  • R-Value Observed: 0.160 

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This is version 1.3 of the entry. See complete history


Crystal structure of CotA laccase complexed with 2,2-azinobis-(3-ethylbenzothiazoline-6-sulfonate) at a novel binding site

Liu, Z.Xie, T.Zhong, Q.Wang, G.

(2016) Acta Crystallogr F Struct Biol Commun 72: 328-335

  • DOI: https://doi.org/10.1107/S2053230X1600426X
  • Primary Citation of Related Structures:  
    4YVN, 4YVU

  • PubMed Abstract: 

    The CotA laccase from Bacillus subtilis is an abundant component of the spore outer coat and has been characterized as a typical laccase. The crystal structure of CotA complexed with 2,2-azinobis-(3-ethylbenzothiazoline-6-sulfonate) (ABTS) in a hole motif has been solved. The novel binding site was about 26 Å away from the T1 binding pocket. Comparison with known structures of other laccases revealed that the hole is a specific feature of CotA. The key residues Arg476 and Ser360 were directly bound to ABTS. Site-directed mutagenesis studies revealed that the residues Arg146, Arg429 and Arg476, which are located at the bottom of the novel binding site, are essential for the oxidation of ABTS and syringaldazine. Specially, a Thr480Phe variant was identified to be almost 3.5 times more specific for ABTS than for syringaldazine compared with the wild type. These results suggest this novel binding site for ABTS could be a potential target for protein engineering of CotA laccases.

  • Organizational Affiliation

    Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, People's Republic of China.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Spore coat protein A513Bacillus subtilis subsp. subtilis str. 168Mutation(s): 0 
Gene Names: cotApigBSU06300
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
Small Molecules
Experimental Data & Validation

Experimental Data

  • Resolution: 2.30 Å
  • R-Value Free: 0.187 
  • R-Value Work: 0.159 
  • R-Value Observed: 0.160 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 101.73α = 90
b = 101.73β = 90
c = 135.572γ = 120
Software Package:
Software NamePurpose
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: 2016-03-30
    Type: Initial release
  • Version 1.1: 2016-04-06
    Changes: Database references
  • Version 1.2: 2016-04-27
    Changes: Database references
  • Version 1.3: 2023-11-08
    Changes: Data collection, Database references, Derived calculations, Refinement description