Polyclonal antisera elicited bý lysozymes: insights into antigenic structure and evolution

Area of Science:

• Immunology
• Molecular Evolution
• Protein Biochemistry

Background:

• The multideterminant-regulatory model explains the antigenic structure of globular proteins.
• Evolutionary studies of bird lysozymes c provided key insights into protein antigenicity.

Purpose of the Study:

• To review evidence supporting the multideterminant-regulatory model.
• To demonstrate the correlation between immunological differences and amino acid sequence differences.
• To highlight the utility of immunological distances in inferring evolutionary relationships.

Main Methods:

• Analysis of polyclonal antisera elicited by evolutionary variants of bird lysozymes c.
• Examination of antigenic properties of lysozyme c and other globular proteins.
• Calculation of immunological distances and comparison with amino acid sequence data.

Main Results:

• The entire surface of globular proteins is largely antigenic.
• Nearly all evolutionary substitutions impact immunological cross-reactivity.
• Immunological distances provide a reliable method for inferring genealogical relationships and evolutionary timescales.

Conclusions:

• Polyclonal antisera are valuable tools for understanding protein evolution and antigenicity.
• Immunological data strongly correlate with molecular evolutionary changes.
• Immunological distances offer a robust approach for reconstructing evolutionary histories.