title: Synthesis, characterization and interaction studies of copper based drug with Human Serum Albumin (HSA): spectroscopic and molecular docking investigations.
abstract: A new water soluble copper(II) complex, [Cu(glygly)(ssz)(H(2)O)]⋅6H(2)O, 1 derived from dipeptide (glycyl glycine anion) and sulfasalazine was synthesized and characterized by elemental analysis (CHN), molar conductance measurements and spectroscopic methods (IR, UV-vis, ESI-MS). The complex 1 is non-ionic in nature and possess octahedral geometry around Cu(II) metal ion. The interaction of complex 1 with Human Serum Albumin (HSA) was investigated under physiological condition in Tris-HCl buffer solution at pH 7.4 by means of various spectroscopic methods (fluorescence, CD and FTIR) and molecular docking technique. The results of fluorescence titration revealed that the complex 1 strongly quench the intrinsic fluorescence of HSA through a static quenching procedure. Binding constants (K(b)) and the number of binding sites (n≈1) were calculated using modified Stern-Volmer equations. The thermodynamic parameters ΔG at different temperatures were calculated subsequently the value of ΔH and ΔS was also calculated which revealed that the hydrophobic and hydrogen bonding interactions play a major role in HSA-complex 1 association. The distance r between donor (HSA) and acceptor (complex 1) was obtained according to fluorescence resonance energy transfer and the alterations of HSA secondary structure induced by complex 1 were confirmed by FT-IR and CD measurements.
authors: Department of Chemistry, Aligarh Muslim University, Aligarh 202 002, UP, India. tsartaj62@yahoo.com
authors: Sartaj
authors: S
authors: Tabassum
authors: Waddhaah M
authors: WM
authors: Al-Asbahy
authors: Mohd
authors: M
authors: Afzal
authors: Farukh
authors: F
authors: Arjmand
mesh_terms: D001665:Binding Sites; D003198:Computer Simulation; D056831:Coordination Complexes / Q000138:chemical synthesis* / Q000737:chemistry; D003300:Copper / Q000737:chemistry*; D004735:Energy Transfer; D006801:Humans; D011485:Protein Binding; D017433:Protein Structure, Secondary; D017434:Protein Structure, Tertiary; D012709:Serum Albumin / Q000737:chemistry* / Q000378:metabolism; D013816:Thermodynamics
chemical_list: D056831:Coordination Complexes; D012709:Serum Albumin; D003300:Copper