DNA sequence homology between attB-related sites of Corynebacterium diphtheriae, Corynebacterium ulcerans, Corynebacterium glutamicum, and the attP side of γ-Cornephage

Nicholas Cianciotto, Terry Serwold-Davis, Neal Groman, Giulio Ratti*, Rino Rappuoli

*Corresponding author for this work

Research output: Contribution to journalArticle

11 Scopus citations

Abstract

Chromosomal restriction fragments of Corynebacterium ulcerans and C. diphtheriae, containing an integration site for corynephages of the β family, show homology on Southern blots. Homologous DNA in also found in the soil isolate C. glutamicum, although this strain is not susceptible to gb-corynephages. Three of these DNA fragments, one for each bacterial strain, and a fragment of γ-corynephage DNA previously shown to contain the phage integration site, were cloned and sequenced. Alignment of the 3 bacterial sequences shows a very high degreee of homology in a stretch of ca 120 nucleotides, whereas the rest of the sequences is generally non-homologous. Within this common bacterial portion, a segment of ca. 96 nucleotides (core sequence) is also highly homologous to the plague sequence. The first half (ca. 50 bp) of the core sequence is identical in all aligned sequences whereas the second half, which is largely occupied by a stem-and-loop structure, contains point mutations peculiar to each clone. The described sequences are likely to be involved in phage integration/excision processes.

Original languageEnglish (US)
Pages (from-to)299-301
Number of pages3
JournalFEMS Microbiology Letters
Volume66
Issue number1-3
DOIs
StatePublished - Jan 1 1990

Keywords

  • Corynebacterium
  • DNA sequence
  • γ-Corynephage

ASJC Scopus subject areas

  • Microbiology
  • Molecular Biology
  • Genetics

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