Crystal Structure of Tyrosinase from Bacillus megaterium V218F mutant

Experimental Data Snapshot

  • Resolution: 1.80 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.207 
  • R-Value Observed: 0.209 

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Influencing the monophenolase/diphenolase activity ratio in tyrosinase.

Goldfeder, M.Kanteev, M.Adir, N.Fishman, A.

(2013) Biochim Biophys Acta 1834: 629-633

  • DOI: https://doi.org/10.1016/j.bbapap.2012.12.021
  • Primary Citation of Related Structures:  
    4HD4, 4HD6, 4HD7

  • PubMed Abstract: 

    Tyrosinase is a type 3 copper enzyme with great potential for production of commercially valuable diphenols from monophenols. However, the use of tyrosinase is limited by its further oxidation of diphenols to quinones. We recently determined the structure of the Bacillus megaterium tyrosinase revealing a residue, V218, which we proposed to take part in positioning of substrates within the active site. In the structure of catechol oxidase from Ipomoea batatas, the lack of monophenolase activity was attributed to the presence of F261 near CuA. Consequently, we engineered two variants, V218F and V218G. V218F was expected to have a decreased monophenolase activity, due to the bulky residue extending into the active site. Surprisingly, both V218F and V218G exhibited a 9- and 4.4-fold higher monophenolase/diphenolase activity ratio, respectively. X-ray structures of variant V218F display a flexibility of the phenylalanine residue along with an adjacent histidine, which we propose to be the source of the change in activity ratio.

  • Organizational Affiliation

    Department of Biotechnology and Food Engineering, Technion-Israel Institute of Technology, Haifa 32000, Israel.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B
303Priestia megateriumMutation(s): 2 
Find proteins for B2ZB02 (Priestia megaterium)
Explore B2ZB02 
Go to UniProtKB:  B2ZB02
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupB2ZB02
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.80 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.207 
  • R-Value Observed: 0.209 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 48α = 90
b = 78.58β = 106.13
c = 85.89γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling
PDB_EXTRACTdata extraction

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2013-01-23
    Type: Initial release
  • Version 1.1: 2013-02-13
    Changes: Database references
  • Version 1.2: 2024-02-28
    Changes: Data collection, Database references, Derived calculations