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Antigenic determinants of Streptococcus pyogenes ribosomes

L V Nikolaeva1, E P Savel'ev

  • 1Shemyakin & Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, Russia.

Biochemistry and Molecular Biology International
|September 1, 1995
PubMed

Insights

Researchers identified specific ribosomal proteins in Streptococcus pyogenes that trigger antibody production in monkeys. These key antigenic proteins are located on the 50S and 30S ribosomal subunits.

Area of Science:

  • Microbiology
  • Immunology
  • Molecular Biology

Background:

  • Streptococcus pyogenes is a significant human pathogen.
  • Ribosomes are essential cellular machinery involved in protein synthesis.
  • Understanding bacterial ribosomal protein antigenicity is crucial for vaccine development and diagnostics.

Purpose of the Study:

  • To identify specific ribosomal proteins from Streptococcus pyogenes (group A, strain 29 M) that elicit an antibody response after immunization.
  • To determine the ribosomal subunit localization of these immunogenic proteins.

Main Methods:

  • Isolation and separation of 70S, 50S, and 30S ribosomal proteins from Streptococcus pyogenes.
  • One- and two-dimensional gel electrophoresis for protein separation.
  • Immunoblotting (Western blotting) to detect antibody binding to separated proteins.

Main Results:

  • Three major ribosomal proteins of Streptococcus pyogenes 70S ribosomes exhibited significant antigenic properties.
  • One identified immunogenic protein was associated with the 50S ribosomal subunit.
  • Two immunogenic proteins were associated with the 30S ribosomal subunit.

Conclusions:

  • The identified antigenic proteins are likely specific to group A streptococci.
  • Antibodies are primarily produced against these specific streptococcal ribosomal proteins, rather than evolutionarily conserved ones.
  • These findings contribute to understanding host-pathogen interactions and potential targets for therapeutic or diagnostic strategies.

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