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J Bacteriol. 1993 January; 175(1): 141-147

research-article

Characterization of IS1001, an insertion sequence element of Bordetella parapertussis.

A van der Zee, C Agterberg, M van Agterveld, M Peeters and F R Mooi

Laboratory of Medical Microbiology, St. Elisabeth Hospital, Tilburg, The Netherlands.

ABSTRACT

By analysis of repetitive DNA in Bordetella parapertussis, an insertion sequence element, designated IS1001, was identified. Sequence analysis revealed that IS1001 comprised 1,306 bp and contained inverted repeats at its termini. Furthermore, several open reading frames that may code for transposition functions were identified. The largest open reading frame coded for a protein comprising 406 amino acid residues and showed homology to TnpA, which is encoded by an insertion sequence element (IS1096) found in Mycobacterium smegmatis. Examination of flanking sequences revealed that insertion of IS1001 occurs preferentially in stretches of T's or A's and results in a duplication of target sequences of 6 to 8 bases. IS1001 was found in about 20 copies in 10 B. parapertussis strains analyzed. No restriction fragment length polymorphism was observed in B. parapertussis when IS1001 was used as a probe. An insertion sequence element similar or identical to IS1001 was found in B. bronchiseptica strains isolated from pigs and a rabbit. In these strains, about five copies of the IS1001-like element were present at different positions in the bacterial chromosome. Neither B. pertussis nor B. bronchiseptica strains isolated from humans and dogs contained an IS1001-like element. Therefore, IS1001 may be used as a specific probe for the detection of B. parapertussis in human clinical samples.


J Bacteriol. 1993 January; 175(1): 141-147




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