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Study on the interaction between curcumin and CopC by spectroscopic and docking methods.

Zhen Song1, Wen Yuan1, Ruitao Zhu1

  • 1Taiyuan Normal University Department of Chemistry, Taiyuan, 030012, China.

International Journal of Biological Macromolecules
|December 1, 2016
PubMed
Summary
This summary is machine-generated.

This study reveals how curcumin interacts with the copper chaperone CopC, altering its structure and forming a complex. This interaction is crucial for understanding potential cancer treatments involving copper chaperones and curcumin.

Keywords:
CopCCurcuminFluorescence

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Biophysics

Background:

  • Curcumin, a polyphenol, exhibits anti-inflammatory and antitumor properties.
  • Copper chaperones are implicated in cancer treatment, particularly their interaction with small molecules.

Purpose of the Study:

  • To investigate the interaction between curcumin and the copper chaperone CopC.
  • To elucidate the structural and binding characteristics of the CopC-curcumin complex.

Main Methods:

  • UV-vis absorption spectroscopy
  • FTIR spectroscopy
  • Circular Dichroism (CD) spectroscopy
  • Fluorescence spectroscopy
  • Molecular docking

Main Results:

  • Curcumin binding induced conformational changes in CopC, reducing beta-sheet content and increasing random coil.
  • A host-guest inclusion supramolecular complex formed between CopC and curcumin with a formation constant of (2.85±0.21)×10^5 M^-1.
  • Curcumin's binding affinity for Cu2+ is lower than CopC's, and Cu2+ influences the curcumin-CopC binding.

Conclusions:

  • The CopC-curcumin complex formation is primarily driven by hydrophobic forces.
  • Thermodynamic parameters (ΔH and ΔS) were determined, indicating the binding mechanism.
  • Molecular docking visualized the binding site of curcumin on CopC, providing structural insights.