A target site for spontaneous insertion of IS10 element in pUC19 DNA located within intrinsically bent DNA

A target site for spontaneous insertion of IS10 element in pUC19 DNA located within intrinsically bent DNA

Residual insertion sequence elements (IS elements) in Escherichia coli strains that are commonly used for DNA cloning are known to cause cloning artifacts by transposing themselves into the recombinant DNA fragments. In such cases, chance insertion of IS elements may occur at integration sites in th...

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Veröffentlicht in:The open microbiology journal 2009-09, Vol.3 (1), p.146-150
Hauptverfasser: Kobori, Shungo, Ko, Yumi, Kato, Mikio
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Escherichia coli
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Ko, Yumi
Kato, Mikio
description Residual insertion sequence elements (IS elements) in Escherichia coli strains that are commonly used for DNA cloning are known to cause cloning artifacts by transposing themselves into the recombinant DNA fragments. In such cases, chance insertion of IS elements may occur at integration sites in the cloning targets, which in the case of the IS10 element is a 9-bp consensus sequence. We report here that the integration of IS10-related DNA sequences into the pUC19 cloning vector and its derivative occurred with considerable frequency in E. coli strains JM107 and DH10B, with duplication of a 9-bp segment (TCTAAAGTA). Notably, native polyacrylamide gel electrophoresis revealed that intrinsically bent DNA flanks the insertion site.
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title A target site for spontaneous insertion of IS10 element in pUC19 DNA located within intrinsically bent DNA
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