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. 1988 Jan;170(1):352–358. doi: 10.1128/jb.170.1.352-358.1988

Sequence requirements of Escherichia coli attTn7, a specific site of transposon Tn7 insertion.

R L McKown 1, K A Orle 1, T Chen 1, N L Craig 1
PMCID: PMC210649  PMID: 2826397

Abstract

Transposon Tn7 transposes at high frequency to a specific site, attTn7, in the Escherichia coli chromosome. We devised a quantitative assay for Tn7 transposition in which Tn7-end derivatives containing the cis-acting transposition sequences of Tn7 transpose from a bacteriophage lambda vector upon infection into cells containing the Tn7-encoded transposition proteins. We used this assay to identify a 68-base-pair DNA segment containing the sequences essential for attTn7 target activity. This segment is positioned asymmetrically with respect to the specific point of Tn7 insertion in attTn7 and lacks obvious homology to the sequences at the ends of Tn7 which participate directly in transposition. We also show that some sequences essential for attTn7 target activity are contained within the protein-coding sequence of a bacterial gene.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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