Fluorescence spectroscopy and molecular modeling studies on the interaction of aflatoxin B1 and G1 with bovine α-lactalbumin
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Summary
This summary is machine-generated.Aflatoxins B1 and G1 bind to bovine alpha-lactalbumin, forming complexes. Aflatoxin G1 exhibits higher binding affinity and a more compact structure with the protein.
Area Of Science
- Biochemistry
- Food Safety
- Toxicology
Background
- Aflatoxins are toxic metabolites from Aspergillus fungi, linked to liver damage and cancer.
- Bovine alpha-lactalbumin (ALA) is a major milk whey protein with various biological roles.
Purpose Of The Study
- To investigate the interaction between Aflatoxin B1 (AFB1) and Aflatoxin G1 (AFG1) with bovine alpha-lactalbumin (ALA).
- To determine the binding affinity, mechanism, and structural complex formation using biophysical and computational methods.
Main Methods
- Fluorescence spectroscopy to analyze protein-ligand interactions and quenching mechanisms.
- Molecular docking simulations to predict binding sites, modes, and affinities.
- Molecular dynamic (MD) simulations to refine binding parameters and assess complex stability.
Main Results
- Spectroscopy revealed static quenching of ALA's intrinsic fluorescence by AFB1 and AFG1.
- AFG1 demonstrated a higher binding affinity (Ka = 1.35 × 10^4 L mol^-1) and a more stable complex compared to AFB1.
- Molecular docking and MD simulations confirmed hydrophobic and hydrogen bond interactions, with simulation improving affinity constant accuracy.
Conclusions
- Bovine alpha-lactalbumin can form complexes with both Aflatoxin B1 and Aflatoxin G1.
- Aflatoxin G1 shows a stronger interaction and forms a more compact complex with ALA than Aflatoxin B1.
- These findings contribute to understanding aflatoxin interactions with milk proteins, relevant for food safety assessments.
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