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首页> 外文期刊>Plasmid: An International Journal Devoted to Extrachromosomal Gene Systems >Sequences essential for replication of plasmid pIJ101 in Streptomyces lividans.
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Sequences essential for replication of plasmid pIJ101 in Streptomyces lividans.

机译:淡紫色链霉菌中质粒pIJ101复制所必需的序列。

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摘要

A 2.1-kb SacII DNA fragment of the high-copy-number Streptomyces lividans plasmid pIJ101 previously has been shown to include the functions required for maintenance of pIJ101 as an extrachromosomal replicon. This fragment contains the open translational reading frames rep and orf 56 plus an intervening segment believed to be noncoding. Using deletion mutations, we show that the pIJ101 replication origin and other cis-acting sites necessary and sufficient for replication map to a DNA segment that extends 515 bp 5' to the translational start of Rep and lacks orf56. Plasmids that include this segment are maintained in S. lividans as extrachromosomal replicons when complemented in trans by the rep gene product.
机译:先前已显示出高拷贝数的青紫链霉菌质粒pIJ101的2.1-kb SacII DNA片段具有维持pIJ101作为染色体外复制子所需的功能。该片段包含开放翻译阅读框rep和orf 56以及被认为是非编码的中间片段。使用删除突变,我们表明pIJ101复制起点和其他必要和足够的复制的顺式作用位点映射到一个DNA片段,该片段延伸515 bp 5'到Rep的翻译起点,并且缺少orf56。当包含rep基因产物反式互补时,包含该区段的质粒作为染色体外复制子维持在紫葡萄链球菌中。

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