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- W2057063041 endingPage "4606" @default.
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- W2057063041 abstract "ABSTRACT Surprisingly little is known about the role of host factors in regulating transposition, despite the potentially deleterious rearrangements caused by the movement of transposons. An extensive mutant screen was therefore conducted to identify Escherichia coli host factors that regulate transposition. An E. coli mutant library was screened using a papillation assay that allows detection of IS 903 transposition events by the formation of blue papillae on a colony. Several host mutants were identified that exhibited a unique papillation pattern: a predominant ring of papillae just inside the edge of the colony, implying that transposition was triggered within these cells based on their spatial location within the colony. These mutants were found to be in pur genes, whose products are involved in the purine biosynthetic pathway. The transposition ring phenotype was also observed with Tn 552 , but not Tn 10 , establishing that this was not unique to IS 903 and that it was not an artifact of the assay. Further genetic analyses of purine biosynthetic mutants indicated that the ring of transposition was consistent with a GTP requirement for IS 903 and Tn 552 transposition. Together, our observations suggest that transposition occurs during late stages of colony growth and that transposition occurs inside the colony edge in response to both a gradient of exogenous purines across the colony and the developmental stage of the cells." @default.
- W2057063041 created "2016-06-24" @default.
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- W2057063041 date "2005-07-01" @default.
- W2057063041 modified "2023-09-26" @default.
- W2057063041 title "Genetic Evidence that GTP Is Required for Transposition of IS <i>903</i> and Tn <i>552</i> in <i>Escherichia coli</i>" @default.
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- W2057063041 doi "https://doi.org/10.1128/jb.187.13.4598-4606.2005" @default.
- W2057063041 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/1151752" @default.
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