title: [Studies on the interaction of rhein with bovine serum albumin by spectroscopic and voltammetric methods].
abstract: The interaction between rhein and bovine serum albumin(BSA) was studied by UV-Visible, fluorescence spectroscopy and circular dichroism in conjunction with electrochemical method. The results indicated that rhein has a powerful ability to quench the albumin's fluorescence in a static mode. The binding constants(KA) and binding site numbers (n) obtained at different temperatures were 3.67 x 10(5), 0.99 (298 K) and 2.60 x 10(4), 0.83 (309 K) respectively. According to the thermodynamic parameters the main sorts of binding force of rhein-BSA was fixed as electrostatic. The distance between donor and acceptor in rhein-BSA was 3.28 nm based on the Förster energy transfer theory. Results of the circular dichroism and synchronous fluorescence show that the binding can cause conformation change of BSA.
authors.affiliation: College of Chemistry and Chemical Engineering, Shihezi University, Shihezi 832000, China. lianghui861021@163.com
authors.forename: Hui
authors.initials: H
authors.lastname: Liang
authors.forename: Fang
authors.initials: F
authors.lastname: Zhao
authors.forename: Bing-Qi
authors.initials: BQ
authors.lastname: Li
mesh_terms: D000880:Anthraquinones / Q000737:chemistry*; D001665:Binding Sites; D002942:Circular Dichroism; D004735:Energy Transfer; D005453:Fluorescence; D012710:Serum Albumin, Bovine / Q000737:chemistry*; D013050:Spectrometry, Fluorescence; D013816:Thermodynamics
chemical_list: D000880:Anthraquinones; D012710:Serum Albumin, Bovine; C020491:rhein