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Characterization of a novel integrative element, ICESt1, in the lactic acid bacterium Streptococcus thermophilus.

ABSTRACT: The 35.5-kb ICESt1 element of Streptococcus thermophilus CNRZ368 is bordered by a 27-bp repeat and integrated into the 3' end of a gene encoding a putative fructose-1,6-biphosphate aldolase. This element encodes site-specific integrase and excisionase enzymes related to those of conjugative transposons Tn5276 and Tn5252. The integrase was found to be involved in a site-specific excision of a circular form. ICESt1 also encodes putative conjugative transfer proteins related to those of the conjugative transposon Tn916. Therefore, ICESt1 could be or could be derived from an integrative conjugative element.

SUBMITTER: Burrus V 

PROVIDER: S-EPMC92057 | biostudies-literature | 2000 Apr

REPOSITORIES: biostudies-literature

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Characterization of a novel integrative element, ICESt1, in the lactic acid bacterium Streptococcus thermophilus.

Burrus V V   Roussel Y Y   Decaris B B   Guédon G G  

Applied and environmental microbiology 20000401 4

The 35.5-kb ICESt1 element of Streptococcus thermophilus CNRZ368 is bordered by a 27-bp repeat and integrated into the 3' end of a gene encoding a putative fructose-1,6-biphosphate aldolase. This element encodes site-specific integrase and excisionase enzymes related to those of conjugative transposons Tn5276 and Tn5252. The integrase was found to be involved in a site-specific excision of a circular form. ICESt1 also encodes putative conjugative transfer proteins related to those of the conjuga  ...[more]

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