4HD7

Crystal Structure of Tyrosinase from Bacillus megaterium V218G mutant soaked in CuSO4


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.282 
  • R-Value Work: 0.254 
  • R-Value Observed: 0.257 

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This is version 1.1 of the entry. See complete history


Literature

Influencing the monophenolase/diphenolase activity ratio in tyrosinase.

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

(2013) Biochim Biophys Acta 1834: 629-633

  • DOI: 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 ...

    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.


    Related Citations: 
    • First structures of an active bacterial tyrosinase reveal copper plasticity.
      Sendovski, M., Kanteev, M., Ben-Yosef, V.S., Adir, N., Fishman, A.
      (2011) J Mol Biol 405: 227

    Organizational Affiliation

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



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
TyrosinaseA, B303Priestia megateriumMutation(s): 2 
EC: 1.14.18.1
UniProt
Find proteins for B2ZB02 (Priestia megaterium)
Explore B2ZB02 
Go to UniProtKB:  B2ZB02
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupB2ZB02
Protein Feature View
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  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.282 
  • R-Value Work: 0.254 
  • R-Value Observed: 0.257 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 47.9α = 90
b = 78.67β = 105.91
c = 85.77γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling
PHASERphasing
PHENIXrefinement
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