4J6V

Crystal Structure of Tyrosinase from Bacillus megaterium N205D mutant


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.210 
  • R-Value Work: 0.193 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

The mechanism of copper uptake by tyrosinase from Bacillus megaterium.

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

(2013) J.Biol.Inorg.Chem. 18: 895-903

  • DOI: 10.1007/s00775-013-1034-0
  • Primary Citation of Related Structures:  4J6T, 4J6U

  • PubMed Abstract: 
  • Tyrosinase belongs to the type¬†3 copper enzyme family, containing a dinuclear copper center, CuA and CuB. It is mainly responsible for melanin production in a wide range of organisms. Although copper ions are essential for the activity of tyrosinase, ...

    Tyrosinase belongs to the type 3 copper enzyme family, containing a dinuclear copper center, CuA and CuB. It is mainly responsible for melanin production in a wide range of organisms. Although copper ions are essential for the activity of tyrosinase, the mechanism of copper uptake is still unclear. We have recently determined the crystal structure of tyrosinase from Bacillus megaterium (TyrBm) and revealed that this enzyme has tighter binding of CuA in comparison with CuB. Investigating copper accumulation in TyrBm, we found that the presence of copper has a more significant effect on the diphenolase activity. By decreasing the concentration of copper, we increased the diphenolase to monophenolase activity ratio twofold. Using a rational design approach, we identified five variants having an impact on copper uptake. We have found that a major role of the highly conserved Asn205 residue is to stabilize the orientation of the His204 imidazole ring in the binding site, thereby promoting the correct coordination of CuB. Further investigation of these variants revealed that Phe197, Met61, and Met184, which are located at the entrance to the binding site, not only play a role in copper uptake, but are also important for enhancing the diphenolase activity. We propose a mechanism of copper accumulation by the enzyme as well as an approach to changing the selectivity of TyrBm towards L-dopa production.


    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, 32000, Haifa, Israel.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Tyrosinase
A, B
303Bacillus megateriumN/A
Find proteins for B2ZB02 (Bacillus megaterium)
Go to UniProtKB:  B2ZB02
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CU
Query on CU

Download SDF File 
Download CCD File 
A, B
COPPER (II) ION
Cu
JPVYNHNXODAKFH-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.210 
  • R-Value Work: 0.193 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 54.900α = 90.00
b = 78.330β = 105.50
c = 82.160γ = 90.00
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
PHENIXrefinement
SCALAdata scaling
MOSFLMdata reduction
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-12-25
    Type: Initial release