Abstract
New mononuclear copper(II) Schiff base complex were designed and synthesized, targetingDNA using carrier protein HSA. [Display omitted]
•New metal-based complex was synthesized and characterized.•DNA binding studies revealed the electrostatic interaction mode of binding.•Complex 1 shows efficient hydrolytic cleavage of pBR322 DNA.•Complex 1 recognizes minor groove.
New copper(II) complex with Schiff base ligand 4-[(2-Hydroxy-3-methoxy-benzylidene)-amino]-benzoic acid (H2L) was synthesized and characterized by spectroscopic and analytical and single crystal X-ray diffraction studies which revealed that the complex 1 exist in a distorted octahedral environment. In vitro CT-DNA binding studies were performed by employing different biophysical technique which indicated that the 1 strongly binds to DNA in comparison to ligand via electrostatic binding mode. Complex 1 cleaves pBR322 DNA via hydrolytic pathway and recognizes minor groove of DNA double helix. The HSA binding results showed that ligand and complex 1 has ability to quench the fluorescence emission intensity of Trp 214 residue available in the subdomain IIA of HSA.