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Interaction of ethanol with blood proteins
Ostrovsky YuM1, I I Stepuro, A N Artsukevich
1Institute of Biochemistry, Byelorussian SSR Academy of Sciences, Grodno, USSR.
Alcohol and Alcoholism (Oxford, Oxfordshire). Supplement
|January 1, 1987
Summary
Ethanol (alcohol) reversibly binds to human serum albumin and hemoglobin during intoxication. This binding alters protein structure, stability, and ligand interactions, impacting biological functions.
Area of Science:
- Biochemistry
- Molecular Biology
- Pharmacology
Background:
- Ethanol is a common toxin with known biological effects.
- Human serum albumin and hemoglobin are crucial proteins involved in transport and oxygen carriage.
- Understanding ethanol's molecular interactions is vital for toxicology and medicine.
Purpose of the Study:
- To investigate the binding of ethanol to human serum albumin and hemoglobin at intoxication-relevant concentrations.
- To determine the effects of ethanol binding on protein conformation, stability, and ligand interactions.
Main Methods:
- In vitro studies using purified human serum albumin and hemoglobin.
- Spectroscopic techniques to assess protein conformation and stability.
- Ligand binding assays to evaluate changes in hydrophobic interactions.
Main Results:
- Ethanol reversibly bound to both albumin and hemoglobin.
- Alcohol altered protein conformation and reduced stability.
- Ethanol decreased domain-domain interactions in albumin and affected binding of hydrophobic ligands like ANS and bilirubin.
Conclusions:
- Ethanol interacts directly with key human proteins at physiologically relevant concentrations.
- These interactions lead to significant structural and functional changes in albumin and hemoglobin.
- The findings provide molecular insights into alcohol's toxicological effects.