Purification of tea leaf (Camellia sinensis) polyphenol oxidase by using affinity chromatography and investigation of its kinetic properties

  • Cansu Öztürk
  • Mine Aksoy
  • Ömer İrfan KüfrevioğluEmail author
Original Paper


Polyphenol oxidase (PPO) was purified from tea leaves (Camellia sinensis) via affinity chromatography for the first time and the purified enzyme was characterized. The purity of enzyme and molecular weight was determined by SDS-PAGE and non-denaturing PAGE (native PAGE). Single bands were observed with both electrophoretically methods. The PAGE results indicated that the molecular weight of PPO from tea leaf was approximately 50 kDa. The pH, temperature, and kinetic parameters were studied. Km values were 3.782 and 3.881 mM for catechol and 4-methylcatechol respectively. Vmax values for catechol and 4-methylcatechol were also determined as 1.676 and 1.912 µmol/L min respectively. Additionally, the inhibition effects of sodium metabisulfite, sodium sulfite, ascorbic acid, glutathione, dithioerythritol were investigated on the enzyme activity and IC50, Ki values were calculated for these substances.


Tea leaf Purification Polyphenol oxidase Characterization Inhibition 



The authors declare that there is no financial or material support.

Author contributions

MA, OIK: Designed the experiments. MA and CO: Performed the experiments. MA, CO and OIK: Analyzed the data.OIK: Contributed reagents/materials. MA, CO and OIK: Wrote the paper. The final manuscript was read and approved by all authors.


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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  • Cansu Öztürk
    • 1
  • Mine Aksoy
    • 1
  • Ömer İrfan Küfrevioğlu
    • 1
    Email author
  1. 1.Department of Chemistry, Faculty of SciencesAtatürk UniversityErzurumTurkey

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