5I38

Crystal Structure of tyrosinase from Bacillus megaterium with inhibitor kojic acid in the active site


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.208 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

The unravelling of the complex pattern of tyrosinase inhibition.

Deri, B.Kanteev, M.Goldfeder, M.Lecina, D.Guallar, V.Adir, N.Fishman, A.

(2016) Sci Rep 6: 34993-34993

  • DOI: 10.1038/srep34993
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Tyrosinases are responsible for melanin formation in all life domains. Tyrosinase inhibitors are used for the prevention of severe skin diseases, in skin-whitening creams and to avoid fruit browning, however continued use of many such inhibitors is c ...

    Tyrosinases are responsible for melanin formation in all life domains. Tyrosinase inhibitors are used for the prevention of severe skin diseases, in skin-whitening creams and to avoid fruit browning, however continued use of many such inhibitors is considered unsafe. In this study we provide conclusive evidence of the inhibition mechanism of two well studied tyrosinase inhibitors, KA (kojic acid) and HQ (hydroquinone), which are extensively used in hyperpigmentation treatment. KA is reported in the literature with contradicting inhibition mechanisms, while HQ is described as both a tyrosinase inhibitor and a substrate. By visualization of KA and HQ in the active site of TyrBm crystals, together with molecular modeling, binding constant analysis and kinetic experiments, we have elucidated their mechanisms of inhibition, which was ambiguous for both inhibitors. We confirm that while KA acts as a mixed inhibitor, HQ can act both as a TyrBm substrate and as an inhibitor.


    Organizational Affiliation

    Department of Biotechnology and Food Engineering, Technion-Israel Institute of Technology, Haifa, 3200003, Israel.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Tyrosinase
A, B
287Bacillus megateriumMutation(s): 0 
Find proteins for B2ZB02 (Bacillus megaterium)
Go to UniProtKB:  B2ZB02
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
KOJ
Query on KOJ

Download SDF File 
Download CCD File 
A, B
5-HYDROXY-2-(HYDROXYMETHYL)-4H-PYRAN-4-ONE
C6 H6 O4
BEJNERDRQOWKJM-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: 2.6 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.208 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 70.240α = 90.00
b = 74.970β = 90.00
c = 121.700γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
SCALAdata scaling
PDB_EXTRACTdata extraction
MOSFLMdata reduction
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
ISFIsrael419/15

Revision History 

  • Version 1.0: 2016-10-12
    Type: Initial release
  • Version 1.1: 2016-10-19
    Type: Database references