Spectroscopic studies on the interaction between nicotinamide and bovine serum albumin.
The interaction of nicotinamide (NA) and bovine serum albumin (BSA) was studied by fluorescence and absorption spectroscopy at different temperatures. The results revealed that NA caused the fluorescence quenching of BSA through a static quenching procedure. The binding constants K(A), and the number of binding sites n, corresponding thermodynamic parameters DeltaG, DeltaH, DeltaS between NA and BSA at different temperatures were calculated. The primary binding pattern between NA and BSA was interpreted as hydrophobic interaction. In addition, the effect of NA on the conformation of BSA was analyzed using synchronous fluorescence spectroscopy. The binding average distance, r between the donor (BSA) and acceptor (NA) was determined based on the Förster's theory and it was found to be 3.1 nm.
Xu
Hui
H
School of Chemistry and Materials Science, Ludong University, Yantai City, Shandong Province 264025, China. xuhui235@yahoo.com.cn
Liu
Quanwen
Q
Wen
Yanqing
Y
D000818:Animals; D001665:Binding Sites; D002417:Cattle; D004735:Energy Transfer; D057927:Hydrophobic and Hydrophilic Interactions; D066298:In Vitro Techniques; D007700:Kinetics; D009536:Niacinamide / Q000737:chemistry* / Q000378:metabolism; D011487:Protein Conformation; D012710:Serum Albumin, Bovine / Q000737:chemistry* / Q000378:metabolism; D013050:Spectrometry, Fluorescence; D013053:Spectrophotometry; D013056:Spectrophotometry, Ultraviolet; D013816:Thermodynamics
D009536:Niacinamide; D012710:Serum Albumin, Bovine