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. 1990 Sep;172(9):4959–4963. doi: 10.1128/jb.172.9.4959-4963.1990

Uncoupling of transpositional immunity from gamma delta transposition by a mutation at the end of gamma delta.

L A Wiater 1, N D Grindley 1
PMCID: PMC213151  PMID: 2168371

Abstract

The transposon gamma delta, in common with other members of the Tn3 family, confers transpositional immunity, a phenomenon by which plasmids containing a single transposon end show reduced activity as targets for further insertion by the same element. We found that a copy of a mutant delta end, in which the two terminal base pairs (5' GG) were substituted with cytosines, conferred the same degree of immunity as the unaltered delta end. However, a transposon analog with the mutant delta end as its termini could not transpose. These results suggest that the binding of transposase to a site on a target replicon is sufficient to confer immunity and that immunity does not involve subsequent DNA transactions at the bound target site, analogous to the catalytic processes that occur at the transposon ends during transposition.

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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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