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Genetic evidence that control of F replication is negative

✍ Scribed by Kline, Bruce C. ;Seelke, Ralph W.

Book ID: 104725523
Publisher: Springer
Year: 1982
Tongue: English
Weight: 729 KB
Volume: 187
Category: Article
ISSN: 0026-8925
DOI: 10.1007/bf00331120

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✦ Synopsis

We have taken advantage of two situations in which the incompatibility barrier between F plasmids is overcome to show that wild-type genes controlling F copy number (cop+) are dominant in trans over mutant genes. The simplest interpretation of our findings is that the cop mutations have inactivated a repressor gene that controls F replication. Since the cop. mutations all map in a region that others have shown by sequence analysis to theoretically encode four proteins, a strong possibility exists that one of these proteins is the repressor.

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