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Abstract:
Eckert, Edward A. (University of Michigan, Ann Arbor). Envelope protein(s) derived from influenza virus. J. Bacteriol. 91:1907-1910. 1966.-Lipids were extracted from influenza virus, strain PR8, with methanol-chloroform, and the protein residue was dissolved in 67% glacial acetic acid. Hemagglutinating activity and complement-fixing reactivity were markedly reduced or lost during lipid extraction, and then increased after acetic acid treatment and subsequent dialysis. Evidence is presented that the envelope protein(s) responsible for these activities is dissociated in acetic acid and reassociated at neutral pH.
Insights
Influenza virus envelope proteins responsible for hemagglutinating and complement-fixing activities were studied. Acid treatment dissociated these proteins, which then reassociated at neutral pH, restoring viral activity.
Area of Science:
- Virology
- Protein Chemistry
- Biochemistry
Background:
- Influenza virus envelope proteins play crucial roles in viral infectivity and antigenicity.
- Understanding the structural and functional properties of these proteins is essential for developing antiviral strategies and vaccines.
Purpose of the Study:
- To investigate the role of influenza virus envelope proteins in hemagglutinating and complement-fixing activities.
- To elucidate the dissociation and reassociation behavior of these proteins under different chemical conditions.
Main Methods:
- Lipid extraction from influenza virus (strain PR8) using methanol-chloroform.
- Dissociation of protein residue in 67% glacial acetic acid.
- Assessment of hemagglutinating and complement-fixing activities.
- Reassociation of proteins through subsequent dialysis.
Main Results:
- Lipid extraction significantly reduced or abolished hemagglutinating and complement-fixing activities.
- Treatment with glacial acetic acid and subsequent dialysis restored these activities.
- Evidence suggests that the envelope proteins responsible for these activities dissociate in acidic conditions and reassociate at neutral pH.
Conclusions:
- The study identifies specific influenza virus envelope proteins responsible for key biological activities.
- These proteins exhibit pH-dependent dissociation and reassociation, influencing their functional state.
- This finding provides insights into the molecular mechanisms underlying influenza virus structure and function.