Site- and strand-specific nicking in vitro at oriT by the traY-traI endonuclease of plasmid R100

作者: S. Inamoto , Y. Yoshioka , E. Ohtsubo

DOI: 10.1016/S0021-9258(18)99193-3

关键词: DNANicking enzymeMolecular biologyA-sitePlasmidEndonucleaseGenetic transferGeneBase pairBiology

摘要: Abstract We developed an in vitro system to reproduce a site- and strand-specific nicking at the oriT region of plasmid R100. The reaction was dependent on purified TraY protein lysate, which prepared from cells overproducing TraI protein. This supports idea that products two genes, traY traI, constitute endonuclease introduces specific nick vivo conjugative plasmids related were "complex" DNA molecules with covalently linked 5'-end nick. introduced strand, is supposed be transferred recipient during conjugation, located site 59 base pairs upstream binding site, sbyA.

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