Open AccessDNA sequence homology between att B‐related sites of Corynebacterium diphtheriae, Corynebacterium ulcerans, Corynebacterium glutamicum , and the att P side of γ‐Cornephage
Author(s) -
Cianciotto Nicholas,
SerwoldDavis Terry,
Groman Neal,
Ratti Giulio,
Rappuoli Rino
Publication year - 1990
Publication title -
fems microbiology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.899
H-Index - 151
eISSN - 1574-6968
pISSN - 0378-1097
DOI - 10.1111/j.1574-6968.1990.tb04015.x
Subject(s) - corynebacterium glutamicum , corynebacterium diphtheriae , biology , homology (biology) , corynebacterium , nucleic acid sequence , dna , restriction map , genetics , sequence analysis , insertion sequence , microbiology and biotechnology , virology , genome , bacteria , gene , diphtheria , vaccination , transposable element
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.