ISL1: a new transposable element in Lactobacillus casei |
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| Authors: | Mariko Shimizu-Kadota Mayumi Kiwaki Hideo Hirokawa Nobuo Tsuchida |
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| Affiliation: | (1) Yakult Central Institute for Microbiological Research, Kunitachi, 186 Tokyo, Japan;(2) Life Science Institute, Sophia University, Kioicho, Chiyoda-ku, 102 Tokyo, Japan;(3) Present address: Department of Oral Microbiology, Dental School, Tokyo Medical and Dental University, Bunkyo-ku, 113 Tokyo, Japan |
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| Abstract: | Summary The genome structures of a temperate Lactobacillus phage,  FSW, and its virulent mutants, FSVs, were examined by restriction, heteroduplex and nucleotide-sequence analyses. The results showed that two out of three FSVs had the same 1.3 kbp insertion (designated as ISL1) at different positions in the FSW sequence. ISL1 was 1,256 bp long and contained at least two long open reading frames of 279 and 822 bases on one strand. Inverted repeats were found at the termini of the ISL1 which was bracketed by 3 bp direct repeats of the FSW sequence. From this evidence, we concluded that ISL1 was a transposable element in Lactobacillus casei. |
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