Functional specificity of the replication fork-arrest complexes of Bacillus subtilis and Escherichia coli: significant specificity for Tus±Ter functioning in E. coli

Blackwell Publishing Ltd
Publication Type:
Journal Article
Molecular Microbiology, 2000, 36 (6), pp. 1327 - 1335
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The Escherichia coli replication terminator TerB was inserted in its two alternate orientations into a Bacillus subtilis fork-arrest assay plasmid. After transferring these new plasmids into B. subtilis, which could overproduce the E. coli terminator protein Tus, it was shown that the E. coli Tus±TerB complex could cause polar replication fork arrest, albeit at a very low level, in B. subtilis. A new B. subtilis±E. coli shuttle plasmid was designed to allow the insertion of either the TerI (B. subtilis) or TerB (E. coli) terminator at the same site and in the active orientation in relation to the approaching replication fork generated in either organism. Fork-arrest assays for both terminator-containing plasmids replicating in both organisms which also produced saturating levels of either the B. subtilis terminator protein (RTP) or Tus were performed
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