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Updated: Jan 21, 2026
08:26
Luminophore Formation in Various Conformations of Bovine Serum Albumin by Binding of GoldIII
Published on: August 31, 2018
7.3K
Structural Characterization of a Gold/Serum Albumin Complex
Alessandro Pratesi1, Damiano Cirri1, Dolores Fregona2
1Laboratory of Metals in Medicine (MetMed), Department of Chemistry "U. Schiff" , University of Florence , via della Lastruccia 3 , 50019 Sesto Fiorentino , Italy.
Inorganic Chemistry
|July 31, 2019
Summary
This study reveals the first crystal structure of a gold adduct with serum albumin. A gold(I) center binds to Cys34, releasing the dithiocarbamato ligand from the medicinal gold(III) complex.
Area of Science:
- Medicinal inorganic chemistry
- Protein crystallography
- Biochemistry
Background:
- Bovine serum albumin (BSA) is a key protein in biological systems.
- Gold complexes are investigated for medicinal applications.
- Understanding drug-protein interactions is crucial for drug development.
Purpose of the Study:
- To determine the structural basis of the interaction between a gold(III) dithiocarbamato complex and bovine serum albumin.
- To elucidate the binding site and the fate of the ligand upon complexation.
Main Methods:
- X-ray crystallography was employed to determine the structure of the gold-BSA adduct.
- Synthesis and characterization of the gold(III) dithiocarbamato complex (AuL12).
Main Results:
- A stable adduct formed between the gold(III) complex and BSA.
- The crystal structure revealed a single gold(I) center bound to cysteine 34 (Cys34) of BSA.
- The dithiocarbamato ligand was released from the gold center upon binding.
Conclusions:
- This work provides the first structural evidence of a gold adduct with serum albumin.
- The findings highlight the specific binding of gold to a cysteine residue in serum albumin.
- The study offers insights into the mechanism of gold complexation with proteins.
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