嗜热链球菌中新型整合元件ICESt1的特性分析
Characterization of a novel integrative element, ICESt1, in the lactic acid bacterium Streptococcus thermophilus.
作者信息
Burrus V, Roussel Y, Decaris B, Guédon G
机构信息
Laboratoire de Génétique et Microbiologie, INRA UA952, Faculté des Sciences, Université Henri Poincaré (Nancy 1), 54506 Vandoeuvre-lès-Nancy, France.
出版信息
Appl Environ Microbiol. 2000 Apr;66(4):1749-53. doi: 10.1128/AEM.66.4.1749-1753.2000.
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.
摘要
嗜热链球菌CNRZ368的35.5 kb ICESt1元件由一个27 bp的重复序列界定，并整合到一个编码假定的果糖-1,6-二磷酸醛缩酶的基因的3'端。该元件编码与接合转座子Tn5276和Tn5252相关的位点特异性整合酶和切除酶。发现整合酶参与环状形式的位点特异性切除。ICESt1还编码与接合转座子Tn916相关的假定的接合转移蛋白。因此，ICESt1可能是一个整合接合元件，或者可能源自一个整合接合元件。
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