4D87

Crystal Structure of Tyrosinase from Bacillus megaterium in complex with SDS


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.5 Å
  • R-Value Free: 0.293 
  • R-Value Work: 0.259 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Changes in tyrosinase specificity by ionic liquids and sodium dodecyl sulfate.

Goldfeder, M.Egozy, M.Shuster Ben-Yosef, V.Adir, N.Fishman, A.

(2013) Appl.Microbiol.Biotechnol. 97: 1953-1961

  • DOI: 10.1007/s00253-012-4050-z

  • PubMed Abstract: 
  • Tyrosinase is a member of the type 3 copper enzyme family involved in the production of melanin in a wide range of organisms. The ability of tyrosinases to convert monophenols into diphenols has stimulated studies regarding the production of substitu ...

    Tyrosinase is a member of the type 3 copper enzyme family involved in the production of melanin in a wide range of organisms. The ability of tyrosinases to convert monophenols into diphenols has stimulated studies regarding the production of substituted catechols, important intermediates for the synthesis of pharmaceuticals, agrochemicals, polymerization inhibitors, and antioxidants. Despite its enormous potential, the use of tyrosinases for catechol synthesis has been limited due to the low monophenolase/diphenolase activity ratio. In the presence of two water miscible ionic liquids, [BMIM][BF(4)] and ethylammonium nitrate, the selectivity of a tyrosinase from Bacillus megaterium (TyrBm) was altered, and the ratio of monophenolase/diphenolase activity increased by up to 5-fold. Furthermore, the addition of sodium dodecyl sulphate (SDS) at levels of 2-50 mM increased the activity of TyrBm by 2-fold towards the natural substrates L-tyrosine and L-Dopa and 15- to 20-fold towards the non-native phenol and catechol. The R209H tyrosinase variant we previously identified as having a preferential ratio of monophenolase/diphenolase activity was shown to have a 45-fold increase in activity towards phenol in the presence of SDS. We propose that the effect of SDS on the ability of tyrosinase to convert non-natural substrates is due to the interaction of surfactant molecules with residues located at the entrance to the active site, as visualized by the newly determined crystal structure of TyrBm in the presence of SDS. The effect of SDS on R209 may enable less polar substrates such as phenol and catechol, to penetrate more efficiently into the enzyme catalytic pocket.


    Organizational Affiliation

    Department of Biotechnology and Food Engineering, Technion-Israel Institute of Technology, Haifa 32000, 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 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SDS
Query on SDS

Download SDF File 
Download CCD File 
A
DODECYL SULFATE
C12 H26 O4 S
MOTZDAYCYVMXPC-UHFFFAOYSA-N
 Ligand Interaction
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: 3.5 Å
  • R-Value Free: 0.293 
  • R-Value Work: 0.259 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 47.840α = 90.00
b = 79.140β = 103.56
c = 85.930γ = 90.00
Software Package:
Software NamePurpose
SCALAdata scaling
REFMACrefinement
MOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-06-20
    Type: Initial release
  • Version 1.1: 2013-02-27
    Type: Database references