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Interaction of copper(II) complex of compartmental Schiff base ligand N,N′-bis(3-hydroxysalicylidene)ethylenediamine with bovine serum albumin

Boghaei, D. M ; Sharif University of Technology | 2007

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  1. Type of Document: Article
  2. DOI: 10.1016/j.saa.2006.04.006
  3. Publisher: 2007
  4. Abstract:
  5. Circular dichroism (CD) spectroscopy, cyclic voltammetry (CV) and differential pulse voltammetry (DPV) were used to investigate the interaction between copper(II) complex of compartmental Schiff base ligand (L), N,N′-bis(3-hydroxysalicylidene)ethylenediamine, and bovine serum albumin (BSA) in 0.1 mol dm-3 phosphate buffer solution adjusted to physiological pH 7.0 containing 20% (w/w) dimethylsulfoxide at room temperature. CD spectra show that the interaction of the copper(II) complex with BSA leads to changes in the α-helical content of BSA and therefore changes in secondary structure of the protein with the slight red shift (2 nm) in CD spectra. From the voltammetric data, i.e. changes in limiting current with addition of BSA, the binding constant (K) of the interaction of copper(II) complex with BSA was found to be 1.96 × 104 dm3 mol-1. From the shifts in potential with the addition of BSA, the equilibrium constant ratio (K2/K1) for the binding of the oxidized CuIIL (K1) and reduced CuIL (K2) species to BSA was found to be 3.77, which shows that the reduced form CuIL is bound more strongly to BSA than the oxidized form CuIIL. © 2006
  6. Keywords:
  7. Bovine serum albumin (BSA) ; Circular dichroism (CD) spectroscopy ; Differential pulse voltammetry (DPV) ; Schiff base ligand ; Amines ; Chemical bonds ; Complexation ; Cyclic voltammetry ; Molecular structure ; Proteins ; Copper compounds ; Bovine serum albumin ; Buffer ; Copper ; Ethylenediamine ; Ethylenediamine derivative ; Ligand ; N,N' bis(3 hydroxysalicylidene)ethylenediamine ; N,N'-bis(3-hydroxysalicylidene)ethylenediamine ; Organometallic compound ; Schiff base ; Unclassified drug ; Animal ; pH ; Protein secondary structure ; Solution and solubility ; Animals ; Buffers ; Cattle ; Electric Conductivity ; Ethylenediamines ; Hydrogen-Ion Concentration ; Kinetics ; Ligands ; Organometallic Compounds ; Protein Structure, Secondary ; Schiff Bases ; Serum Albumin, Bovine ; Solutions ; Circular dichroism
  8. Source: Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy ; Volume 66, Issue 3 , 2007 , Pages 650-655 ; 13861425 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S1386142506002435