doi: 10.1016/0923-2508(92)90071-u.
Characterization of a linear extrachromosomal DNA element (pBL1) isolated after interspecific mating between Streptomyces bambergiensis and S. lividans
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- PMID: 1299837
- DOI: 10.1016/0923-2508(92)90071-u
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Characterization of a linear extrachromosomal DNA element (pBL1) isolated after interspecific mating between Streptomyces bambergiensis and S. lividans
Res Microbiol.
1992 Nov-Dec.
Free article
Abstract
Streptomyces bambergiensis S712 harbours a giant linear plasmid PSB1 of 640 kb. After mating with the plasmidless S. lividans strain TK64, conjugants carrying a smaller extrachromosomal DNA element, pBL1, were identified. pBL1 is a 43-kb linear DNA molecule bound to a protein which protects it from attack by both 3'- and 5'-exonucleases. The absence of this protein drastically reduces the transforming efficiency of pBL1. pBL1 shares homology with linear plasmids and chromosomal DNA from S. bambergiensis strains.
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