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  • The interaction between 4-aminoantipyrine and bovine serum albumin: multiple spectroscopic and molecular docking investigations.

The interaction between 4-aminoantipyrine and bovine serum albumin: multiple spectroscopic and molecular docking investigations.

Journal of hazardous materials (2011-04-19)
Yue Teng, Rutao Liu, Chao Li, Qing Xia, Pengjun Zhang
ABSTRACT

4-Aminoantipyrine (AAP) is widely used in the pharmaceutical industry, in biochemical experiments and in environmental monitoring. AAP as an aromatic pollutant in the environment poses a great threat to human health. To evaluate the toxicity of AAP at the protein level, the effects of AAP on bovine serum albumin (BSA) were investigated by multiple spectroscopic techniques and molecular modeling. After the inner filter effect was eliminated, the experimental results showed that AAP effectively quenched the intrinsic fluorescence of BSA via static quenching. The number of binding sites, the binding constant, the thermodynamic parameters and binding subdomain were measured, and indicated that AAP could spontaneously bind with BSA on subdomain IIIA through electrostatic forces. Molecular docking results revealed that AAP interacted with the Glu 488 and Glu 502 residues of BSA. Furthermore, the conformation of BSA was demonstrably changed in the presence of AAP. The skeletal structure of BSA loosened, exposing internal hydrophobic aromatic ring amino acids and peptide strands to the solution.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
4-Aminoantipyrine, ≥99.0%, JIS special grade
Sigma-Aldrich
4-Aminoantipyrine, puriss. p.a., reag. Ph. Eur., ≥99%
Supelco
4-Aminoantipyrine, for spectrophotometric det. of H2O2 and phenols, ≥98.0%
Sigma-Aldrich
4-Aminoantipyrine, reagent grade