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. 1978 Nov;75(11):5437–5441. doi: 10.1073/pnas.75.11.5437

Structure of the lambda att sites generated by int-dependent deletions.

R H Hoess, A Landy
PMCID: PMC392979  PMID: 364480

Abstract

Bacteriophage lambda integrates into the chromosome of its Escherichia coli host by means of a site-specific recombination between a locus on the phage chromosome (phage att site) and a locus on the bacterial chromosome (bacterial att site). The nucleotide sequence of four lambda att sites altered in site-specific recombination has been determined. The int-dependent deletions that generated these att sites have one end point within the phage att site and extend either to the left or to the right. As a result of the new internucleotide bond created by deletion formation, these phage have alterations in the 15-base-pair common core region. The new DNA sequences brought to the att sites by the deletions, designated delta for regions to the left and delta' for regions to the right, do not share any discernible homology with their analogous counterparts in the phage att site arms, P and P', respectively, or with the bacterial att site arms, B and B', respectively. The finding of alterations in the 15-base-pair common core region necessitates a reinterpretation of the genetic properties of these att sites in site-specific recombination. The structure of these sites in relation to their genetic properties can be viewed as being consistent with a model in which the only specificity elements in int-dependent site-specific recombination are the common core region, O, and the phage arms, P and P'.

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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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