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J Microbiol Methods. 2002 Mar;49(1):89-96.

Cointegrate resolution following transposition of Tn1792 in Streptomyces avermitilis facilitates analysis of transposon-tagged genes.

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School of Biological Sciences, University of Wales Swansea, Singleton Park, SA2 8PP, Swansea, UK.


The insertion sequence IS6100, belonging to the IS6 family, normally forms a cointegrate as an end product of transposition. The IS6100-based minitransposon, Tn1792, has been developed as a genetic tool to mutagenise antibiotic-producing Streptomyces. Here, we describe resolution of Tn1792 cointegrates in Streptomyces avermitilis that can facilitate both the initial isolation of Tn1792 insertion mutants and also the subsequent rescue of Tn1792-tagged sequences. This is the first reported example of cointegrate resolution for an IS6-type transposable element. As a result of mutagenesis, several putative genes involved in morphological development and antibiotic production have been isolated.

[Indexed for MEDLINE]

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