Partition functions of unit-copy plasmids can stabilize the maintenance of plasmid pBR322 at low copy number

Author:

Austin S,Friedman S,Ludtke D

Abstract

The maintenance of plasmid pBR322 is highly unstable in a polA12 strain of Escherichia coli at 29 degrees C due to severely reduced copy number. Under these conditions, introduction of the par (partition) locus of plasmid P1 or the par (sop) region of F into pBR322 stabilizes it. A region with similar activity was detected in the P7 plasmid. The activity of the P1 par locus was dependent on the P1 parA gene product and was sensitive to par-specified incompatibility.

Publisher

American Society for Microbiology

Subject

Molecular Biology,Microbiology

Reference18 articles.

1. Partition of unit-copy miniplasmids to daughter cells. III. The DNA sequence and functional organization of the P1 partition region;Abeles A. L.;J. Mol. Biol.,1985

2. Partition of unit-copy miniplasmids to daughter cells. I. P1 and F miniplasmids contain discrete, interchangeable sequences sufficient to promote equipartition;Austin S.;J. Mol. Biol.,1983

3. Partition of unit-copy miniplasmids to daughter cells. II. The partition region of miniplasmid P1 encodes an essential protein and a centromerelike site at which it acts;Austin S.;J. Mol. Biol.,1983

4. Two mini-F encoded proteins are essential for equipartition;Austin S.;Plasmid,1983

5. P1 plasmid replication: multiple functions of RepA protein at the origin;Chattoraj D. K.;Proc. Natl. Acad. Sci. USA,1985

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