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Unusually strong immunological cross-reaction between elongation factor Tu of Escherichia coli and Bacillus subtilis

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Abstract

Polyclonal antibodies were prepared against the purified elongation factor Tu (EF-Tu) of Escherichia coli and Bacillus subtilis. Using the methods of Western blotting and microcomplement fixation the cross-reactivities of EF-Tu of 19 different prokaryotes were determined. The immunological distance were compared with the results of 16S rRNA oligonucleotide analysis. An unexpectedly high cross-reactivity was revealed between the EF-Tu of B. subtilis and the antiserum against the EF-Tu of E. coli. A comparison of the predicted amino acid sequences from the tuf-genes of E. coli and B. subtilis yielded two identical peptide fragments that are likely candidates for antibody binding sites.

Original languageEnglish
Pages (from-to)258-262
Number of pages5
JournalArchives of Microbiology
Volume152
Issue number3
DOIs
StatePublished - Aug 1989

Keywords

  • Antibody binding site
  • Cross-reactivity
  • Elongation factor Tu
  • Microcomplement fixation
  • Western blot

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