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The plasmids ofDeinococcusspp. and the cloning and restriction mapping of theD. radiophilusplasmid pUE1

✍ Scribed by Martin W. Mackay; Ghalib H. Al-Bakri; B. E. B. Moseley

Publisher
Springer
Year
1985
Tongue
English
Weight
478 KB
Volume
141
Category
Article
ISSN
0302-8933

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✦ Synopsis

Plasmids were found in strains representing all four species of the genus Deinococcus viz. D. radiodurans, D. radiopugnans, D. radiophilus and D. proteolyticus but were not found in the most intensively-investigated strain of the genus, D. radiodurans R1. Their sizes were calculated from electron micrographs. D. radiophilus yielded three size classes ofplasmid while D. radiodurans Sark, D. proteolyticus and D. radiopugnans each yielded two. Attempts to cure D. radiophilus and D. radiodurans Sark of any of their plasmids, using a variety of methods, were unsuccessful. A 10.8 kbase pair (kb) plasmid from D. radiophilus, pUEI, was cloned into the PstI site of pAT153 and propagated in Escherichia coli HB101. The recombinant plasmid, pUE109 was subjected to single and double digestion with various restriction endonucleases and its restriction map constructed. The resistance ofE. coli HB 101 to ultraviolet radiation was not increased when pUE109 was introduced into it. Attempts to transform D. radiodurans with pUE109 failed to detect tetracycline-resistant transformants.

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